Datasheet DTV306, DTV307 Datasheet

Page 1

Television

Tech-Line Tip

TTT01-002

The information contained herein is provided solely to assist in the diagnosis of the problem described. It is not intended as a modification or alteration of the product.

DATE: 6/4/01 MODEL/CHASSIS: DTV306/307 TOPIC:Putting Chassis in Service Position

1. Remove the yoke board as shown in picture 1.

2. Remove the DM-1 power supply as shown in picture 2.

3. Swing the left end of the chassis out as shown in picture 3.

4. Turn the chassis over to get to the bottom as shown in picture 4.

Picture 1

Product Safety Information

Product Safety information is contained in the appropriate TCE Service Data covering models/chassis referenced herein. All specified Product Safety requirements and testing shall be complied with prior to returning equipment to the customer. Servicers who defeat safety features or fail to perform safety checks may be liable for any resulting damages and may expose themselves and others to possible injury.

Page 1 of 3 (TTT01-002)

Page 2

Picture 2

Picture 3

Product Safety Information

Page 2 of 3 (TTT01-002)

Page 3

Picture 4

Product Safety Information

Page 3 of 3 (TTT01-002)

Page 4

Television

Tech-Line Tip

TTT01-006

The information contained herein is provided solely to assist in the diagnosis of the problem described. It is not intended as a modification or alteration of the product.

DATE: 8/9/01 MODEL/CHASSIS: DTV300, DTV306, and DTV307 TOPIC:

TOPIC: Troubleshoot the DM-1 SYMPTOM: No signal in the menu

If when trying to view Satellite channels you get “searching for signal” the problem may be that the 13/18 voltage coming from the DM-1 is missing. Place the unit is standby and hook a voltmeter on the satellite RF input (center is positive and outside shield is ground). Watch for the voltage to go from 13 volts to 18 volts. If the voltage is there, the problem is at the dish. You need to check the multi-switch or the LNB’s. If the voltage is not there, you need to troubleshoot the DM-1 power supply.

Product Safety Information

Page 1 of 1 (TTT01-006)

Page 5

Television

Tech-Line Tip

TTT01-007

The information contained herein is provided solely to assist in the diagnosis of the problem described. It is not intended as a modification or alteration of the product.

DATE: 8/9/01 MODEL/CHASSIS: DTV306 and DVT307 TOPIC:

TOPIC: CR14608 SYMPTOM: Power light comes ON but no power

When you press the power button and the power LED stays on but you have no power, you need to check VCC on pin 16 and 29 of U13101. If the voltage is low, go to CR14608 and check for 5 volts. Upon checking the diode, if the voltage is missing, change the diode. This diode is located in the standby power supply and supplies voltage to the micro continuously.

Product Safety Information

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Page 6

SAFETY PRECAUTIONS

DO NOT OPERATE THIS INSTRUMENT OR PERMIT IT TO BE OPERATED WITHOUT ALL PROTECTIVE DEVICES INSTALLED AND FUNCTIONING. SERVICERS WHO DEFEAT SAFETY FEATURES OR FAIL TO PERFORM SAFETY CHECKS MAY BE LIABLE FOR ANY RESULTING DAMAGE, AND MAY EXPOSE THEMSELVES AND OTHERS TO POSSIBLE INJURY.

READ AND COMPLY WITH ALL CAUTION AND SAFETYRELATED NOTES ON OR INSIDE THE RECEIVER CABINET, AND THE RECEIVER CHASSIS, OR ON THE PICTURE TUBE.

SAFETY GLASSES SHOULD BE USED WHEN SERVICING ELECTRONIC INSTRUMENTS. INADVERTENTLY OVERSTRESSING COMPONENTS MAY CAUSE THEM TO SHATTER, DISCHARGING SMALL PARTICLES.

DESIGN ALTERATION WARNING - Do not alter or add to the

mechanical or electrical design of this TV receiver. Design alterations and additions may alter the safety characteristics of this receiver and create a hazard to the user. Design alterations or additions may void the manufacturer's warranty and may make you, the servicer, responsible for personal injury or property damage resulting therefrom.

BEFORE RETURNING AN INSTRUMENT TO THE CUSTOMER,

always make a safety check of the entire instrument, including, but not limited to, the following items:

FIRE AND SHOCK HAZARD

1. Never release a repaired unit unless all protective devices such as insulators, barriers, covers, strain reliefs and other protective hardware have been installed in accordance with the original design.

2. Be sure that there are no cabinet openings through which an adult or a child might be able to insert their fingers and contact a hazardous voltage. Such openings include, but are not limited to: (a) spacings between picture tube and cabinet mask, (b) excessively wide cabinet ventilation slots, and (c) an improperly fitted or incorrectly secured back cover.

3. Observe original lead dress. Take care to restore leads to their original dress. Make sure that leads are not in contact with sharp edges or thermally hot parts. Always inspect in all areas for pinched, out-ofplace or frayed wiring. Do not change spacing between adjacent components, or between components and printed-circuit board. Check AC power cord for damage.

4. Be certain to remove loose solder balls and all other loose foreign particles.

5. Check components, parts and/or wiring for physical evidence of damage, overheating or deterioration, and replace if necessary. Determine the cause of damage and/or overheating and, if necessary, take corrective action to remove any potential safety hazard.

6. Parts Replacement - Many TV electrical and mechanical parts have special safety-related characteristics, some of which are often not evident from visual inspection, and the protection they give cannot necessarily be obtained by replacing them with components rated for higher voltage, wattage, etc. Parts that have special safety characteristics are identified in this service data by a ( ) on schematics and in the parts list. Use of a substitute replacement that does not have the same safety characteristics as the recommended replacement part in the service data parts list may create shock, fire and/or other hazards. Always consult the appropriate current service literature for the latest information.

7. Some TV receiver chassis' normally have 85VAC (RMS) between chassis and earth ground, regardless of the AC plug polarity. Some TV receiver chassis' are electrically connected directly to one conductor of the AC power cord. Some TV receiver chassis' have a secondary ground system in addition to the main chassis ground. This secondary ground system is not isolated from the AC power line. The two ground systems are electrically separated by insulating material that must not be defeated or altered. Thus, when servicing any unit always use a separate isolation transformer for the chassis. Failure to use a separate isolation transformer may expose the servicer to possible shock hazard, and may cause damage to servicing instruments.

8. Many electronic products use a polarized AC line cord (one wide pin on the plug). Defeating this safety feature may create a potential hazard to the servicer and the user. Extension cords which do not incorporate the polarizing feature should never be used.

PICTURE TUBE IMPLOSION WARNING - The picture tube in this receiver employs integral implosion protection. For continued implosion protection, replace the picture tube only with one of the same type number.

Do not remove, install, or otherwise handle the picture tube in any manner without first putting on shatterproof goggles equipped with side shields. People not so equipped must be kept safely away while picture tubes are handled. Keep the picture tube away from your body. Do not handle the picture tube by its neck. Some "in-line" picture tubes are equipped with a permanently attached deflection yoke; because of potential hazard, do not try to remove such "permanently attached" yokes from the picture tube.

X-RADIATION AND HIGH VOLTAGE LIMITS - Because the picture tube is the primary source of X-radiation in solid-state TV receivers, it is specially constructed to prohibit X-radiation emissions. For continued Xradiation protection, a replacement picture tube must be the same type as the original. The picture shields, mounting hardware and lenses (projection TV) may also perform an X-radiation protection function, and they must be correctly in place. Anode connectors contain an X-radiation shield - use only the manufacturer's specified anode connectors. High voltage must be measured each time servicing that involves power supply, horizontal deflection or high voltage circuits is performed. Correct operation of the Xradiation circuits must also be confirmed each time these circuits are serviced (X-radiation circuits may also be called "horizontal disable" or "hold-down" circuits). Read and apply high voltage limits and, if the chassis is so equipped, the X-radiation protection circuit specifications. These limits and specifications are given on instrument labels and are included in this service data. High voltage is maintained within specified limits by closetolerance safety-related components (and adjustments) in the high voltage circuit. If high voltage exceeds specified limits, check each safety related component specified on the schematic and take corrective action.

ANTENNA LEAKAGE RESISTANCE CHECK - With the instrument AC plug removed from the AC source, connect an electrical jumper across the two AC plug prongs. Place the instrument AC switch (if applicable) in the "on" position. Connect one lead of an ohmmeter to the AC plug prongs and touch the other ohmmeter lead, in turn, to each (exposed) antenna input terminal screw and/or coaxial connector. If the measured resistance is less than 1.0 Megohm, or greater than 5.2 Megohm, an abnormality exists which must be corrected before the instrument is returned to the customer. Repeat this test with the AC switch in the "off" position.

reading

should be

< 0.5mA

earth

ground

2-wire

cord

DEVICE UNDER

TEST

also test with

plug reversed

(use ac adapter

plug as required)

probe all exposed

metal

surfaces

LEAKAGE

CURRENT

TESTER

LEAKAGE CURRENT HOT CHECK FOR 2-WIRE OR 3-WIRE GROUNDED CORD SETS - With the instrument completely reassembled,

plug the AC line cord into the mains AC outlet at normal line voltage via a non-polarized adapter. DO NOT GROUND THE 3RD PRONG OF THE ADAPTER AND DO NOT USE AN ISOLATION TRANSFORMER. Use a leakage current tester or metering system that complies with American National Standards Institute (ANSI) C101.1 Leakage Current for Appliances and with Underwriters Laboratories (UL) 1492 (Section 67). With the instrument AC switch first in the "on" position and then in the "off" position, measure from a known earth ground (metal water pipe, conduit, etc.) to all exposed metal parts of the instrument (antennas, handle bracket, metal cabinet, screwheads, metallic overlays, control shafts, etc.). Any current measured must not exceed 0.5 milliampere. Reverse the adapter plug in the outlet and repeat the test. ANY MEASUREMENTS NOT WITHIN

THE LIMITS SPECIFIED HEREIN INDICATE A POTENTIAL SHOCK HAZARD THAT MUST BE ELIMINATED BEFORE RETURNING THE INSTRUMENT TO THE CUSTOMER OR BEFORE CONNECTING THE ANTENNA OR ACCESSORIES. If a

leakage current tester is not available, connect a 1.5 Kohm, 10 Watt resistor, in parallel with a 0.15 µF, 150V capacitor, between earth ground and each exposed metal part of the instrument (as shown above). Use an AC voltmeter with at least 5000 ohm/volt sensitivity to measure the potential across the resistor. The potential measured for any exposed metal surface must not exceed 0.75 volts.

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DTV307

MODEL-TO-MAJOR ASSEMBL Y CROSS REFERENCE

KEY TO MAJOR ASSEMBLIES

I1 - I/O PCB (1552392A)

B1 - Frame Comb PCB (1552390A)

M1- Deflection/Power Supply PCB (1553100B)

C1 - Red CRT driver PCB (1558634B)

O1 - Front A/V PCB (1552388A)

C2 - Green CRT driver PCB (1558635B)

P1 - Adapter PCB (1558640C)

C3 - Blue CRT driver PCB (1558636B)

R1 - IR Receiver PCB (1550627A) D1 - DM1 Assembly D2 - DM1-CR Assembly

S1 - Deflection SIP PCB (1552391A)

F1 - Front Panel Assembly PCB (1550420C)

H1 - Convergence Amp PCB (1558574A)

T1 - 2nd Tuner/IF PCB(1507271O)

V1 - Digital Convergence Module PCB (1558637B)

CROSS REFERENCE

HD65W20JX1 ..................................... B1,C1,C2,C3,D2,F1,H1,I1,M1,O1,P1,R1,S1,T1,V1

HD65W20YX1 .................................... B1,C1,C2,C3,D2,F1,H1,I1,M1,O1,P1,R1,S1,T1,V1

P61310JX1 .......................................... B1,C1,C2,C3,D2,F1,H1,I1,M1,O1,P1,R1,S1,T1,V1

P61310JX2 .......................................... B1,C1,C2,C3,D1,F1,H1,I1,M1,O1,P1,R1,S1,T1,V1

P61310JX3 .......................................... B1,C1,C2,C3,D1,F1,H1,I1,M1,O1,P1,R1,S1,T1,V1

P61310JX4 .......................................... B1,C1,C2,C3,D2,F1,H1,I1,M1,O1,P1,R1,S1,T1,V1

PS65000JX2 .................................... B1,C1,C2,C3,D1,F1,H1,I1,M1,O1,P1,R1,S1,T1,V1

SPECIFICATIONS

General Specifications

Power Requirements: 95-132VAC, 50-60Hz Power Consumption: 250 watts maximum

RF Specifications

Tuning System: Quartz-controlled multiband

frequency synthesis

Band Coverage: VHF channels 2-13

UHF channels 14-69

Cable channels 1-125 Frequency Coverage: 54-806 MHz Antenna Inputs: 75-ohm UHF/VHF Sensitivity: 10uV

DBS IF Tuning Range

IF Tuning Range 950 - 1450 Mhz

Audio Specifications

Frequency Response: 50-20,000 Hz (@ rated output) Stereo Modes: Dbx stereo, Enhanced SRS Au x Audio In: 250mVRMS typical,

A/V Input: 500mVRMS typical Input Impedance: 50Kohms (source impedance

Power Output: 10 watts/channel Fixed Audio Output: 250mVRMS into 10Kohms

Headphones: 16 ohms recommended

Remote Control

Transmission System: Digitally encoded infrared light Battery Life: One year normal use

2.25VRMS maximum

should be < 2Kohms) RMS into 8 ohms <0.5% THD

Video Specifications

Aux Video In: 1Vp-p, 75 ohms, neg sync SVHS Luma In: 1Vp-p, 75 ohms, neg sync SVHS Chroma In: 286mVp-p burst, 75 ohms Aux Video Out: 1Vp-p, 75 ohms, negative sync A/V Input: 1Vp-p, 75 ohms, neg sync Other Inputs: Component Video (Y, PR, PB)

Specifications subject to change without notice.

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DTV307

SCHEMATIC NOTES

1 . Resistor values are in ohms (K = X1,000; Meg = X1,000,000). Tolerance is 5%, unless otherwise specified. [ ] Indicates a flat (type 1206) surface-mounted device; 1/8 watt unless otherwise specified. / \ Indicates a flat (type 0805) surface-mounted device; 1/10 watt unless otherwise specified.

(no markings) indicates 1/4 watt, 5% tolerance axial-leaded device, unless otherwise specified.

2 . Capacitor values 1.0 and above are in picofarads; values less than 1.0 are in F, unless otherwise specified.

• • Indicates a cylindrical surface mounted device; 50 volt unless otherwise specified.

[ ] Indicates a flat (type 1206) surface-mounted device; 50 volt unless otherwise specified. / \ Indicates a flat (type 0805) surface-mounted device; 50 volt unless otherwise specified.

(no markings) indicates a radial- or axial-leaded device; 50 volt unless otherwise specified.

3 . DC voltages measured with NTSC color bar signal applied (via RF channel 3), except for audio voltages, which are measured

with MTS stereo 1KHz signal applied. Voltages in parentheses ( ) indicate standby mode.

4 . Waveforms measured with NTSC color bar signal applied (via RF channel 3), except for audio waveforms, which are measured

with MTS stereo 1KHz signal applied.

5 . Special symbols:

Indicates schematic zone locator Indicates service test point Indicates wire-wrap stake Indicates connection via point-to-point wire Indicates jumper wire (top side) Indicates zero ohm chip (bottom side) Indicates "hot" ground Indicates "cold" ground

SERIAL NUMBER LOCA TION

Serial Number/Model Number Location on Chassis

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Page 9

DTV307

Circuit Protection

Fusible Device Circuit Protected Physical Location

F14200 (6.0 A, 125V) AC Input Power Supply PCB, Left rear chassis F14100 (3.0 A, 125V) AC Input DM1 Power Supply PCB, Left rear

COMPONENT NUMBERING SYSTEM

Serviceability of this chassis is enhanced by prominent road mapping on the top and bottom of the circuit boards. The component numbering system relates to general circuit areas as follows:

11300 Series - Audio Outputs 11400 Series - Audio Input Switching 11500 Series - Audio Compression 11700 Series - SRS Audio 11800 Series - Audio TVB 11900 Series - Audio Power Amp, AVR 13100 Series - System Control (Control) 13200 Series - I/O Control 13400 Series - User Controls (Front Panel Assembly) 14100 Series - Power Supply (Regulator) 14200 Series - Power Supply (AC Input) 14300 Series - Deflection SIP 14400 Series - S-Cap Switch 14500 Series - Vertical 14600 Series - Standby Power Supply 14700 Series - Horizontal, HV 14800 Series - Scan 16300 Series - Frame Comb 16500 Series - Video Switching 17100 Series - 2nd 17300 Series - 2nd Tuner

Tuner

17400 Series - 2nd Tuner, PLL 18100 Series - F2PIP 18500 Series - Video I/O 19100 Series - Adapter 19300 Series - Convergence Amps 19500 Series - Digital Convergence 19700 Series - Convergence Power Supply 22300 Series - Video Control 22400 Series - Digital Interface 24500 Series - LNB Power Supply 24800 Series - Deflection SIP 25100 Series - Red CRT Drive 25300 Series - Green CRT Drive 25500 Series - Blue CRT Drive 26100 Series - FAV 27900 Series - 2nd Tuner IF 32100 Series - 2nd Tuner IF Out 38300 Series - Sync Processing 41100 Series - Fan Shutdown

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Page 10

DISASSEMBLY PROCEDURES

Back Panel Removal

The cabinet back panel is held in place with several 1/4" hex head screws. The number of (and placement of) screws varies with the cabinet design. Remove screws as necessary to release the cabinet back panel.

Mirror Removal

1. Remove the screen assembly.

2. Remove four screws located on the back of the instrument holding the screen assembly.

Chassis Assembly Removal

1. Remove the back cover.

2. Remove two 1/4" hex screws holding the chassis to the bottom of the cabinet.

3. Disconnect cables as necessary to service. Most of the cables can be left connected for servicing by releasing the wire ties and holders. Remove the DM1 Power Supply for better access.

Note: Lead dress is critical on this chassis. Make sure all

cables, wires etc, are returned to their original lead dress. See lead dress photos at the end of this section.

I/O Board Panel Removal

1. Remove the back panel.

2. Remove four screws holding the upper half of the I/O board panel and remove.

3. Remove the remaining hex screws and four torx screws.

4. Release one tab on each side of the panel and remove.

DM1 Module Removal

1. Remove the back panel.

2. Release tabs on each side of the DM1 Power Supply and remove.

3. Remove two screws holding main chassis assembly.

4. Remove two screws holding DM1 to chassis.

5. Lift up and slide out of chassis.

6. Remove three screws holding DM1 mounting bracket to chassis assembly.

7. Disconnect cables and remove DM1 from chassis.

Speaker Grill Assembly Removal

Pull the speaker grill assembly away from the front of the instrument.

Screen Assembly Removal

1. Remove the speaker grill.

2. Disconnect the in-line connector coming from the Auto Convergence sensors.

3. Remove the hex screws located along the bottom of the screen assembly and back of the instrument.

4. Pull out slightly on the bottom of the screen assembly and lift the assembly up to remove.

5. Remove two hex screws holding FPA assembly to screen frame.

6. Unplug cable to Front A/V assembly.

CRT Removal Note: Be sure to mark the location and orientation of the

tube assemblies as they are removed. When reassembling, position the assemblies back to their original position.

1. Remove the screen assembly.

2. Remove the 1/4" hex head screws securing the top CRT access panel (located on top of the CRT's) and remove the panel.

3. Remove the 1/4" hex head screws securing the front CRT access panel (located on the front bottom of the cabinet) and remove panel.

4. Loosen the screw near the bottom of the CRT neck securing the CRT driver circuit board.

LOOSEN SCREW

Fig. 2-1 Loosen screw to remove CRT driver circuit board

5. Pull the CRT driver circuit board off the end of the tube.

6. Carefully mark the location of the SVM coil and remove. When reinstalling the SVM coil, the pad with the white lead soldered to it should be placed on the top of the tube(over the spacing bead) between the 2nd and 3rd grids (Fig 2-2 on page 2-2).

WHITE LEAD PAD

Page 2-1

Page 11

DISASSEMBLY PROCEDURES (Continued)

WHITE LEAD PAD

YOKE CLAMP SCREW

Fig. 2-2 SVM coil placement

7. Loosen the screw on the yoke clamp and remove the yoke(Fig 2-3).

MOUNTING BOLTS

Fig. 2-4 Mounting bolts location

10. Remove the grounding strap and spring.

11. Pull the CRT straight up out of the frame to remove.

YOKE CLAMP SCREW

Fig. 2-3 Yoke clamp

8. Release the anode lead from the HV splitter by pulling the lead straight out (do not twist). Do not remove the anode lead from the CRT.

9. Remove the four mounting bolts(Fig. 2-4).

Yoke Replacement

1. Perform steps 1 thru 7 under "CRT Removal".

2. Remove the hot melt glue from the four tabs on the plastic housing.

3. Release the four tabs and remove the housing.

4. Unsolder the yoke and convergence leads taking note of the color and orientation of the leads.

Second Tuner Circuit Board Removal

1. Twist the tabs to remove the Second Tuner circuit board.

Side Fan Removal

1. Disconnect P41125.

2. Twist one tab on each side of the fan assembly.

3. Pull the top of the fan out first, then the rest of the assembly to remove.

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Page 12

DISASSEMBLY PROCEDURES (Continued)

Critical Lead Dress

Page 2-3

Page 13

DISASSEMBLY PROCEDURES (Continued)

Critical Lead Dress

Page 2-4

Page 14

DTV307 CHIP COMPONENT REMOVAL

Replacement Procedure for Chip Removal

The following procedures are recommended for the replacement of the chip components used in this unit. Failure to follow these procedures may lead to damage to the copper traces and pads on the printed circuit boards.

1.Preparation for replacement

a. Soldering Iron: Use a pencil-type soldering iron

using less than 30 watts.

b. Solder Type: Eutectic Solder, Tin 63%/Lead

37%, is recommended.

c. Soldering Time: Do not apply heat for more than

4 seconds.

d. Preheating: Chip capacitors must be preheated

before installation. (130 degrees - 150 degrees C).

Note: Chip component must not be reused after removal.

Excessive mechanical stress and rubbing of the component electrode must be avoided.

2. Removing the chip component (Fig. 2-3): Grasp the chip component body with tweezers and

alternately apply heat to both electrodes.

Note: Do not attempt to lift the component off the board

until the component is completely disconnected from the board by a twisting action. Attempting to

remove the component before it has completely been disconnected can break the copper foil on the printed circuit board.

3. Installing a chip component

a. Presolder the contact points on the circuit board

(Fig. 2-4).

Fig.2-4, Chip Component Presolder

b. Hold the component in position with tweezers and solder the electrodes as shown (Fig.2-3).

Figure 2-3, Removing Chip Components

When the solder on both electrodes has melted, remove the chip component with a twisting motion.

Fig. 2-3 - Chip Component Installation

Note: Do not glue the replacement chip component to the

circuit board.

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Page 15

DTV307

ALIGNMENT PROCEDURES

Operating Conditions

Unless otherwise noted, the following conditions must be

observed when aligning the DTV307 chassis:

1. Chassis must be operated from a 120VAC isolation transformer, with line voltage set to 120VAC (±2.0V).

2. Picture controls (black level, contrast, etc.) must be set to factory presets via the Picture Quality menu.

3. Procedures must be performed in the sequence given.

4. A 10X probe must be used for oscilloscope and frequency measurements.

5. Minimum warm-up time is 10 minutes.

Required Test Equipment

- Dual-Trace Oscilloscope

- Digital Voltmeter

- Frequency Counter

- Audio Signal Generator

- NTSC Signal Generator (B&K 1249, or equivalent)

- MTS Signal Generator (B&K 2009, or equivalent)

- Sweep/Marker Generator (or Standard Signal Generator)

- TAG001 Service Generator (stock # 215568)

- YPrPb Signal Generator (DVD player with YPrPb)

- DC Power Supply (5.0V/0.25A) for TAG001

- Chipper Check® software

- Chipper Check® interface box and computer

All alignments with the exception of basic color temp

require the use of Chipper Check® software and interface box.

X-Ray Shutdown Check

The following procedure should be performed prior to, and

upon completion of service:

1. Set Black Level and Contrast to maximum. Momentarily apply a short between the shutdown test points (JW14901- located at back edge of chassis) and ground. The instrument must shutdown immediately, then turn back on after ~ 2 seconds.

2. Apply and maintain a short between the shutdown test points. The instrument must shutdown immediately and remain shutdown (the instrument will attempt to restart three times, then remain off).

3. Remove the short from JW14901.

4. Enter the Service Mode and reset the error code parameter(s) to "0".

Entering the TV Service Mode Using the Front Panel Controls

1. Press and release the POWER button to turn the instrument on.

2. Simultaneously press and hold the TV/DIRECTV

and the Channel Down Buttons on the front of the TV.

The instrument will display the following menu: The CH ∧ and CH ∨ buttons on the front panel (or the

P: 0 V: 0

remote transmitter) are used to change the parameter (P) number. The VOL + and VOL - buttons are used to change the value (V).

NOTE: Attempting to change the parameter number (using

CH ∧ or CH ∨) at this point will cause the instrument to exit the service mode. A valid security code must be entered (using VOL + or VOL -) before selecting an alignment parameter.

Security Codes

When the service mode is first turned on, the parameter will be "0", which does not correspond to an alignment. This is the security code parameter, the purpose of which is to prevent accidental entry into the parameter groups. The value (V) must be set to 76 for Front panel access to Chassis Alignments. The value (V) must be set to 80 for Digital Convergence mode. The value (V) must be set to 90 for the Warranty Clock. The value (V) must be set 200 for Chipper Check®. Once Chipper Check® mode (V=200) is selected, the Chipper Check® interface box will take control of the instrument and the front panel will become inoperative.

Once a security code has been set, pressing CH ∧ or CH will result in the following display:

Service Mode

Many of the alignments for this chassis are software-driven; adjustments are made by modifying parameter values using Chipper Check and the service menu. When parameter values are modified, the corresponding T-chip registers, tuner registers and EEprom locations are updated.

A list of the software alignment parameters accessable using the front panel is shown in Table 2. The remainder of the alignments require Chipper Check®. Even though some of the geometry alignments are available through the front panel service menu, adjustment is not recommended. Alignment in one mode will interact and affect the displays of the other modes.

Page 3-1

P: YY V: ZZZ

Where: YY = parameter number

ZZZ = current value

At this point, the CH ∧ and CH ∨ buttons can be used to

change the parameter number and the VOL + and VOL buttons can be used to change the value of the parameter selected.

Page 16

DTV307

ALIGNMENT PROCEDURES (Continued)

Error Codes

If certain failures occur in the chassis, error codes will be stored in the chassis EEprom. These error codes are displayed in parameters "1", "2" and "3". Parameter "1" stores the error code for the first failure experienced by the instrument. Similarly, parameter "2" stores the error code for the second failure. Parameter "3" is automatically updated to display the error code for the most recent failure experienced by the instrument. Error codes are summarized in Table 1.

The presence of a "0" in the error code values indicates that no failures have occurred since the time when the error code parameters were reset. These error codes can (and should) be reset to "0" after servicing with the VOL + and VOL - buttons.

Because a failure of a bus IC is a possible reason for needing service, normal acknowledgment checking is disabled in the service mode. If an IIC device has failed, its address will be stored in the error code area.

Exiting The Service Mode

The service mode can be exited at any time by pressing the INFO button on the remote (except when in ChipperCheck mode). No additional steps are required to write new data into the EEprom(s); new data is entered as parameter values are changed.

CHASSIS ALIGNMENT

The DTV307 chassis requires the use of ChipperCheck®, a TV/PC interface box, and a suitable computer (min. 486DX/ 33MHz PC with 8Meg memory recommended) for the majority of the alignments. Basic geometry and color temperature are the only alignments accessable through the front panel. These adjustments have been included in this service manual as front panel procedures but can also be performed using ChipperCheck®.

ChipperCheck® software and the TV/PC interface box are available from:

AKB Mode (Parameter 27)

Do not change front panel adjustment parameter 27, AKB mode. These are used for factory alignments only. 00 is the default setting. All other adjustment values may set at nominal or half of their full range values when there is a question of what value is needed to begin alignments.

High Voltage Adjustment

The high voltage in this instrument is very critical and requires special test equipment to measure and adjust. Field alignment is not recommended. If one of the following components is replaced the remainder of the components listed must be replaced at the same time. These components are packaged together in a kit (see parts list for stock number): R14767, R14778, R14780, R14776 and R14777. Adjustment of high voltage will not be necessary.

Note: To remove the high voltage leads from R14767, twist

the lead (at least 360deg) while pulling up.

XRP Adjustment

The XRP circuit in this instrument requires special test equipment to measure and adjust. Field alignment is not recommended. If one of the following components is replaced the remainder of the components listed must be replaced at the same time. These components are packaged together in a kit (see parts list for stock number): CR14900, R14900, R14901, R14902, R14904, R14906 and Q14901. Adjustment of XRP will not be necessary.

Vertical Movie Mode (Parameter 14)

1. Always set to "0".

Vertical Slope/Vertical Start Scan (Parameters 15, 16, 17)

These parameters are preset at the factory and should not be aligned.

TCE Publications 10003 Bunsen Way Louisville, KY 40299 Tel. 502-491-8110

Instructions for the operation of ChipperCheck® software and connection of the TV/PC interface are included as context-sensitive help files in the ChipperCheck® software.

Focus Adjustment

1. Tune the instrument to receive a crosshatch signal.

2. Preset Contrast to maximum.

3. Set the value of parameter 41(RGB output mode) to 02.

4. Adjust the Green Mechanical Focus control, located on the CRT assembly for best overall focus.

5. Adjust the Green Electrical Focus control, located behind the speaker grill for best overall focus.

6. Repeat procedure for the red (value 01) and blue(value

03) CRT's.

Page 3-2

Scan ZVS

1 . Apply an NTSC flat white field to AUX 1.

2. Connect a DVM to the +76VRUN power supply (C14111+).

3. Adjust R14101 for 76 + 0.1VDC.

Page 17

DTV307

ALIGNMENT PROCEDURES (Continued)

rorrE

edoC

1seYliaFrewoPlaitinI--

3seYnuRV21+--

6ebyaMhctiwSoediV-S1NUR00561UeruliaFylppuSroCI 7seYssoLnacS--noitcelfeDnacSfossoL 9seYCIoediV1NUR00322UeruliaFylppuSroCI

01ebyaMROPPIP2F1NUR00181UeruliaFylppuSroCI 11ebyaMredoceDoeretS2NUR10713UeruliaFylppuSroCI 21ebyaMdehctaLRVA--evitcARVA

31seYdeppotSnaF--10131U

61seY 81seYsuBybdnatSCII--10131UeruliafatadrokcolcCII 02seY

22reveN

42reveN

52reveN

62syawlA

54/44ebyaMCIPIP2F1NUR00181UeruliaFylppuSroCI

56/46ebyaMCADFIPIP2NUR20972UeruliaFylppuSroCI 76/66ebyaMCADrenuTniaM1NUR20623UeruliaFylppuSroCI

86ebyaMCADnoitcelfeD2NUR00842UeruliaFCI

37/27ebyaMcorPCNYS2NUR00383UeruliaFylppuSroCI

921/821ebyaMredoceDoeretS1NUR10713UrorrEylppuSroCI 431ebyaM 631ebyaMredoceDCSTN1NUR00322UeruliaFylppuSroCI

631ebyaMBVT2NUR00811UeruliaFylppuSroCI 041ebyaM

161/061ebyaMMORPEEO/IYBDTS20131UeruliaFylppuSroCI

761/461ebyaM

961/861ebyaM

781/681ebyaMCIDSO1NUR20231UeruliaFylppuSroCI 291ebyaMLLPrenuTPIP2NUR10471UeruliaFylppuSroCI 491ebyaMCADFIPIP2NUR20972UeruliaFylppuSroCI 691ebyaMLLPrenuTniaM1NUR10552UeruliaFylppuSroCI 891ebyaMCADFIniaM1NUR20623UeruliaFylppuSroCI

022ebyaMorciMmetsyS--10131U

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lataF

rorrE suB eciveD noitidnoC

nuRV21+

tuoporD

nuRV21+

rotinoM

ro1nuRCII

rorrEsuB2nuR

kcatSerawtfoS

wolfrevO

er'uoY-sekirtS-4

derruccOtuO

ecnegrevnoC

rorrEytiraP

ecnegrevnoC

detlaHpooL

ecnegrevnoC

evitcanItuptuO

VAetisopmoC

hctiwS

noitcelfeD

rossecorP

renuTniaM

MORPEE

noitcelfeD

MORPEE

renuTdn2

MORPEE

--10131UeruliafatadrokcolcCII

--10131U

--10131UorciMybdetceteDtluaF

--20591U

1NUR10561UeruliaFylppuSroCI

2NUR05341UeruliaFylppuSroCI

1NUR10623UeruliaFylppuSroCI

2NUR45341UeruliaFylppuSroCI

2NUR30972UeruliaFylppuSroCI

nuRV21+kcehC

noitalugeRnuRV21+kcehC

tiucriCtceteDnaFronaF

eruliaF

teseR.snoitidnoCsuoiraV

.metsys

edoMtnerruCrofMORPEE

detpurroCsi

tonpooLecnegrevnoC

ylreporPgnitarepO

situptuOecnegrevnoC

evitcanI

snoitacinummuoCoN

10131UneewteB

20591Udna

Table 1 - Service Menu Error Codes

Page 3-3

Page 18

DTV307

ALIGNMENT PROCEDURES (Continued)

Parameter # Para m eter Na m e Value Range

00 Service M ode E ntry 76 S et V:76, then in cr em e n t P :

01 Err or Dete ct io n ( 1s t)

02 Error Detection (2nd)

03 Error D e tec tion (la st)

04 Ho rizo ntal P hase 00 .. 63

05 Width Align 00 .. 63

06 Width 00 .. 63

07 E/W P arabola 00 .. 63

08 E/W Trap 00 .. 07

09 E/W Corne r 00 .. 6 3

10 Vertical O ffset 00 .. 07

11 Vertical Amp A lign 00 .. 63

12 V e rtical A m p D elta 00 .. 15

13 Ve rtical C enter 00 .. 63

Notes/Comments/Nominal

Values

Note: Changes VerticalAmpDelta

EEPROM, and Updates VerticalAmp

14 V ertical Movie Mode 00 .. 02 0=N ormal; 1=M ovie1; 2=Movie2

15 Vertical Slope MSB 00 .. 255

16 Vertical Slope LSB 00 .. 255

17 V er t ical S ta r t S c a n 00 .. 59

18 Red Cutoff 00 .. 255

19 Green Cutoff 00 .. 255

20 Blue C utoff 00 .. 255

21 Video Mode Cutoff 00 .. 255

23 Blue Drive 00 .. 127

24 Video Mode Light Output 00 .. 117

25 Text Mode Cutoff 00 .. 255

26 Text Mode Light Output 00 .. 107

27 AKB M ode 00 .. 01

Red Drive

00 ..127

00 = Off; 01 = On

28 Red Cutoff Overide 00 .. 255

29 Green Cutoff Overide 00 .. 255

30 Blue Cutoff O veride 00 .. 255

31 Cutoff (Overide) 00 .. 255

Table 2 - Service Menu Chart

Page 3-4

Page 19

DTV307

ALIGNMENT PROCEDURES (Continued)

32 Comb D/A (Composite) 00 .. 127

33 FPIP Cont rast (Composite) 00 .. 127

34 FPIP Fine T int (Com posite) 00 .. 07

35 FPIP Saturation (Composite) 00 .. 127

36 Comb D/A (S-Video) 00 .. 127

37 FP IP Contrast (S-Video) 00 .. 127

38 FPIP Fine Tint (S-Video) 00 .. 255

39 FPIP Saturation (S-Video) 00 .. 127

40 Digicon Bus Control 00 .. 01

4 1 R GB Out put Mo de 0 0 . . 0 3

0 0 = e n able co mmunica tio n bet ween

Convergence Micro and Digital

Co n v e r gen c e Micro;

01 = Disable communicatio ns

0 = N o r mal

01 = Re d

02 = Green

03 = Blue

00 Digital Convergence Mode 80

00 P TV Sensor P ositioning 82

00 Warranty Clock Menu 90 Security Pass Number for W arranty M enu

PTV Restore Digital Convergence Factory

Alignment Data

PTV Save Digital Convergence Factory

Alignment Data

Securit y P ass Num ber fo r Convergence

Mode

Securit y P ass Num ber for

Sensor Positioning

Sec urit y P ass Num ber f or

Restore Factory Align Data

Securit y P ass Number for Save

Alignment Data

Table 2 (continued) - Service Menu Chart

Page 3-5

Page 20

DTV307

ALIGNMENT PROCEDURES (Continued)

DM1 Service Menu

A seperate Service Menu is included in the DM1 module. The purpose of this service menu is to assist the technician in diagnosing problems with the DM1 module.

Entering the DM1 Service Menu

1. Press and Release the POWER button to turn the instrument on.

2. Simultaneously press the MENU/OK and CHANNEL DOWN on the Front Panel Assembly to enter the service menu.

The instrument will display the following menu.

CAM ID - Also comes from the verifier software. Should be same number as written o the CAM.

DEMOD SIGNAL - If system is tuned to a BBS or HD-SAT signal, will give the signal strength between 0 and 100.

CHECKSUM - 3 checksums will be displayed. I: internal ARM ROM checksum H: checksum on the 2 highest megabytes of flash L: checksum on the 2 lowest megabytes of flash

EEPROM - The AVDEC and Tuner EEPROM are checked. SYSTEM RAM - The transport, external and cache RAM are

tested.

VIDEO DRAM - The video DRAM is tested. MODEM - Will call the phone number entered in the Modem

Number Menu. A complete set of modem test are performed. PHONELINE LEVEL - Will display the voltage measured on

the phone line. DIAL TONE - Checks dail tone. Will display whether the

dialing method is DTMF or Pulse.

Press the Menu/OK on FPA or OK button on Remote to begin Service Test. The Service Test screen will test the system and place the results in the right-hand side of the screen.

AV&TL - AV (Audio/Video) and TL (Tuner Link) are identifiers stored in the EEPROMS.

ROM - The first 4 charaters are the "software model number". The next set of charaters will be the software version. If there is a valid patch, then its ID is displayed as the next 4 charaters. "M" is displayed if Macrovision is enabled. "C" is displayed if Colorburst is enabled.

Example: 028a A04.26 B03.07 MC00

software software patch ID macrovision model number version colorburst enable

CB HISTORY - Indicating the diagnostics for the last 5

attempted calls. The "Information" screen will display AV&TL, ROM,

VERIFIER/CAM and CAM ID test results. Press the Menu/ OK on FPA or OK button on remote to run these tests. The "Odomter" screen will display the Activation Date a DIRECTV signal is acquired for the first time. The Service Counter indicates the number of hours the system has been under power (not just turned on). The "Phone Prefix" screen allows you to enter a 1-digit to access an outside line and also a Call Waiting disable code as well. The "Moden Number" screen will allow a 11-digit phone number to be used during the System Test.

VERIFIER/CAM - Number comes from the verifier software. The first number is the software version. The next number is the CAM version.

Page 3-6

Page 21

DTV307

ALIGNMENT PROCEDURES (Continued)

DTV307 Color Temperature Alignment

Color temperature alignment for the DTV307 projection instrument becomes complex. AKB is not utilized in this instrument and color temperature must be setup for both user selectable color temperature modes, "Normal" and "Warm".

Color temperature is actually setup for only one user mode, then the remainder of the settings are calculated and placed into the proper EEPROM locations. Proper color temperature setup is dependant upon screen control setup. This adjustment is done only once and used as a "reference" for the remaining adjustments.

The order of adjustment is important. The proper order is:

1. Screen Control Setup

2. 2.14H "Video" Mode, "Normal" Temperature.

3. 2.14H, "Video" Mode, "Warm" Temperature.

Screen Control Setup

If screen control setup is done properly, the original color temperature settings will probably be acceptable.

NOTE: AKB will remain "OFF" (0) for all operating

conditions of the DTV307 including all alignment procedures. AKB is not used in the DTV307 instrument at this time.

PRESETS:

To begin, set the instrument to receive a "Comp" input on the Component Video Input (Y, PR, PB) on the rear jack panel using a clean average video signal. Preheat the instrument for at least 20 minutes with an active video display.

In the consumer menu, under Picture Quality, set the

Picture Presets to "Normal Lighting". Then using the Picture Controls, set Contrast to "maximum" and Color to

"minimum". Set Color Warmth to "Normal".

5. Set Video Mode Light Output (P24) to "V:64".

6. Set Blue Drive (P23) to V:64.

7. Set Red Drive (P22) to V:64.

8. Set Video Mode Cutoff (P21) to V:64.

9. Set Blue Cutoff (P:20) to V:127.

10. Set Green Cutoff (P:19) to V:127.

11. Set Red Cutoff (P:18) to V:127.

12. Making certain the 0 IRE Flat Field pattern (TP2) is still displayed, observe the LED's located on the kine boards on the neck of the CRT's. Adjust the Video Mode Cutoff (P21) until any LED illuminates. Continue increasing P:21 until the second of the three LED's illuminates. It does not matter at this point if the first LED goes dim.

13. Now adjust the Red, Blue or Green cutoff control for the LED THAT HAS NOT YET ILLUMINATED until that LED also lights.

NOTE: If the cutoff control runs out of range, increase the

Video Mode Cutoff (P:21) until the final LED lights.

14. Now decrease the two remaining cutoff controls until the respective LED's are just lit.

15. Continue fine adjustment of the Red, Green and Blue cutoff controls until all three LED's are full on.

16. If a colorimeter is available adjust the screen controls for x=.300, y=.310 and Y=1.0 +0.25. If not, increase the screen controls to provide a low level gray pattern. A 10 Bar Gray Scale or similar pattern may be used to provide a known gray pattern. The important point is when the adjustment is complete a very low level uniform gray pattern should be visible when the flat field gray pattern (TP2) is placed on the screen.

DO NOT ADJUST THE SCREEN CONTROLS AGAIN AFTER THIS STEP!!!

In the consumer menu under Screen, set the Menu

Background Color to "Transparent".

Four test patterns, will be required for the procedure. TP1 is a 12 IRE 50% display window for setting the screen controls, lowlights. TP2 is a 0 IRE flat field for setting cathode cutoffs. TP3 is a 100 IRE flat field for setting highlights. TP4 is a 100 IRE 50% Window for setting light output.

To Adjust the Screen Control:

1. Apply TP1 to the Component Video Input (Y, PR, PB).

2. Make certain the preheat and preset conditions have been met.

3. Enter the serviceman menu using the front panel buttons by pressing simultaneously "TV/DIRECTV" and "CHANNEL DOWN" . Use "VOL UP" to place the "V:" value to "76". When a parameter is specified use "CH UP" or "CH DN" to change to the correct parameter number, then use "VOL UP" or "VOL DN" to change the value of the paramter.

4. Set all three screen controls on the focus/screen assembly to minimum (full CCW).

17. Exit the serviceman menu by pressing "INFO" on the remote control. This stores the new values to the EEPROM and completes screen control setup.

If a colorimeter is not available color temperature setup and screen control adjustment should end here. If a colorimeter is available continue to the next section.

To Adjust 2.14H "Video" Mode "Normal" Color Temperature:

1. Apply TP1 to the Component Video Input (Y, PR, PB) and adjust the instrument for normal reception.

2. Make certain the preheat and preset conditions have

been met. In the consumer menu, under Picture Quality, set the Picture Presets to "Normal Lighting". Then using the Picture Controls, set Contrast to "maximum" and Color to "minimum". Set Color Warmth to "Normal".

Page 3-7

Page 22

DTV307

atte

ALIGNMENT PROCEDURES (Continued)

50% 12 IRE

w P

Win

50% 100 IRE

w P

Win

Window Patterns for Color Temperature Setup

Page 3-8

Page 23

DTV307

ALIGNMENT PROCEDURES (Continued)

3 . Enter the serviceman menu using the front panel buttons

by pressing simultaneously the "TV/DIRECTV" and "CHANNEL DOWN". Use "VOL UP" to place the "V:" value to "76". When a parameter is specified use "CH UP" or "CH DN" to change to the correct parameter number, then use "VOL UP" or "VOL DN" to change the value of the parameter.

4. Set the RGB Output Mode (P:41) to V:2. This changes the screen output to green only.

5. Using the colorimeter, adjust Video Mode Cutoff (P:21) for Y=0.420.

6. Change the video test pattern to TP3 (100 IRE Flat Field). Measure the light output with the colorimeter and record as LO#1_____ .

7. Change the video test pattern to TP4 (100 IRE Window). Measure the light output with the colorimeter and adjust the Video Mode Light Output (P:24) to obtain a reading

1.78 times that of LO#1. Record it as LO#2______ .

8. Change the video pattern back to TP1 and repeat step 57 if necessary.

9. To return all three colors, set RGB Output Mode (P:41) to V:0.

10. Change the video test pattern to TP1 (12 IRE Window) and adjust the Red, Green and Blue Cutoffs (P:18, P:19 and P:20) and Video Mode Cutoff (P:21) using the colorimeter for x=0.300, y=0.310, Y=0.600.

11 . Change the video test pattern to TP3 (100 IRE Flat Field).

Set highlight temperature using the Red and Blue Drives (P:22 and P:23) for x=0.300, y=0.310.

12. Repeat steps 10 and 11 as needed for accuracy.

13 . Record the values for P:18, P:19, P:20, P:21, P22, P23 and

P24. These values will be transfered to the same parameters in the "Warm Color Temp Mode" to be used as a starting point.

14. Exit the serviceman menu by pressing "INFO" on the remote control.

15. Enter the customer menu, select "Color Warmth". Change from "Normal" to "Warm" then back to "Normal" to set the correct cutoff values.

To Adjust 2.14H "Video" Mode "Warm" Temperature

Light Output:

1. Set the instrument to receive a "Comp" input on the Component Video Input (Y, PR, PB) on the rear jack panel using a clean average video signal. Preheat the instrument for at least 20 minutes with an active video display.

2. In the consumer menu, under Picture Quality, set

Contrast to "maximum", "Color" to "minimum", Color Warmth to "Warm".

3. In the consumer menu under Screen, set the Menu Background Color to "Transparent".

4 . Enter the serviceman menu using the front panel buttons

by pressing simultaneously the "TV/DIRECTV" and "CHANNEL DOWN". Use "VOL UP" to place the "V:" value to "76". When a parameter is specified use "CH UP" or "CH DN" to change to the correct parameter

number, then use "VOL UP" or "VOL DN" to change the value of the parameter.

5. Set P18, P19, P20, P21, P22, P23 and P23 to the value recorded in the previous 2.14H "Normal" setup to be used as a starting point.

6. Change the video test pattern to TP1 (12 IRE Window) and adjust the Red, Green and Blue Cutoffs (P:18, P:19 and P:20) and Video Mode Cutoff (P:21) using the colorimeter for x=0.313, y=0.329, Y=0.600.

7. Change the video test pattern to TP3 (100 IRE Flat Field). Set highlight temperature using the Red and Blue Drives (P:22 and P:23) for x=0.313, y=0.329.

8. Repeat steps 6 and 7 as needed for accuracy

9. Exit the serviceman menu by pressing "INFO" on the remote control.

Conclusion

The purpose of screen control alignment is to match the electronic video signal to the CRT electrical characteristics. In other words, if the video signal requires beam current to stop, the CRT must know that value. Screen control setup is an exact adjustment.

On the other hand, color temperature can be perceived differently depending upon room lighting and environment, original program material, electrical adjustment of the video processing and control circuits and finally, the viewer. What looks red to a technician, may look purple or orange or any other color to another viewer. The technician should strive to provide a "trained" eye by knowing what proper color tracking is. "Color Tracking" itself is a misnomer. Color temperature alignment is actually striving for a uniform gray, with no hint of color tinting, as the ideal for any light output level of the CRT.

Page 3-9

Page 24

DTV307

ALIGNMENT PROCEDURES (Continued)

Comb D/A Level - Composite (Parameter 32)

1. Apply a 100 IRE (white) signal to the AUX 1 input.

2. Select AUX 1 for the main picture.

3. Connect a scope probe to the negative lead of C22323.

4. Adjust the Comb D/A value (Parameter 32) for 0.71

volts from black (blanking) to white.

Comb D/A Level - SVideo (Parameter 36)

1. Apply a 100 IRE (white) signal to the SVideo input.

2. Select SVideo for the main picture.

3. Connect a scope probe to the negative lead of C22323.

4. Adjust the Comb D/A value (Parameter 32) for 0.71

volts from black (blanking) to white.

PIP Contrast - Composite (Parameter 33)

1. Apply a color bar signal to the AUX 1 input.

2. Select AUX 1 for the main picture.

3. Turn on PIP and select AUX 1 for the PIP picture.

4. Adjust PIP Contrast (Parameter 33) for equal contrast levels between the main picture and the PIP picture.

PIP Tint\Saturation - Composite (Parameters 34, 35)

1. Apply a color bar signal to the AUX 1 input.

2. Select AUX 1 for the main picture.

3. Turn on PIP and select AUX 1 for the PIP picture.

4. Adjust PIP Tint (Parameter 34) for equal tint between the main picture and the PIP picture.

5. Adjust PIP Saturation (Parameter 35) for equal saturation between the main picture and the PIP picture (may affect tint slightly).

6. Repeat steps 4 and 5 until both the tint and saturation level are the same for both pictures.

PIP Contrast - SVideo (Parameter 37)

1. Apply a color bar signal to the SVideo input.

2. Select SVideo for the main picture.

3. Turn on PIP and select SVideo for the PIP picture.

4. Adjust PIP Contrast (Parameter 37) for equal contrast levels between the main picture and the PIP picture.

Geometry Adjustments

The Geometry alignments on this chassis are very critical and must be performed using ChipperCheck®. Even though some of the geometry alignments are available through the front panel service menu, adjustment is not recommended. Alignment in one mode will interact and affect the displays of the other modes.

To perform geometry adjustments a template must be placed on the screen. The grid divides the screen into 6.5 equal squares from right and left to center. It also divides the screen into 5.5 squares from top and bottom to center.

If a template is not available, center screen may be confirmed by placing two strings on the screen. One string is placed on the diagonal from the top left corner to the bottom right. The other is fixed from the top right corner to the bottom left. The intersection of the two lines should be center screen. The outer lines should be just at the frame. All other lines can be measured from center screen and the frame. Chipper Check will provide the measurements depending upon screen size.

For the remainder of the adjustments the grid must be used and the following order FOLLOWED EXACTLY!!!

P12: Do not adjust! P6 is fixed at V:32. P10 is fixed at V:3. P8 is fixed at V:4. P13 is set to V:32 for 2.14H. All other modes the center

horizontal line should intersect at the screen center. P5 is adjusted such that the right border is just inside the

screen frame at point B. P11 is adjusted to place the top border (horizontal line

intersecting point D) is at the upper screen edge. P7 is set to obtain the straightest line between points D and E. P9 is set for the straightest line between points D and E. P11 is re-adjusted (if required) to place the top border

(horizontal line intersecting point D) is at the upper screen edge.

P4 is adjusted after returning normal video to the screen for horizontal centering.

PIP Tint\Saturation - SVideo (Parameters 38,39)

1. Apply a color bar signal to the SVideo input.

2. Select SVideo for the main picture.

3. Turn on PIP and select SVideo for the PIP picture.

4. Adjust PIP Tint (Parameter 33 for equal tint between the main picture and the PIP picture.

5. Adjust PIP Saturation (Parameter 39) for equal saturation between the main picture and the PIP picture (may affect tint slightly).

6. Repeat steps 4 and 5 until both the tint and saturation level are the same for both pictures.

Page 3-10

Figure 1 - Geometry Pattern

Page 25

DTV307

ALIGNMENT PROCEDURES (Continued)

Yoke Centering Ring Adjustment

If Chipper Check is not available it is possible to replace a single CRT and realign geometry by using the centering rings on the CRT.

Using the convergence pattern available when in service menu V:80, the pattern from the replacement CRT may be adjusted to align with either of the two remaining CRT's using the centering rings shown in Figure 2.

First make certain the replacement CRT is placed back in the mounting as close as possible to the position of the original CRT. At this point having the convergence pattern on screen will assist in the mechanical mounting. Once the CRT assembly is located fasten it securely.

Rotate Tabs Together

Spread Tabs Apart

Centering

SVM Y oke

Phosphor

Screen

Kine

Socket

Figure 2 - Centering Rings

Figure 3 - Centering Ring Tab Movement

Using the centering rings (Figure 3) and observing the convergence pattern, rotate and move the pattern until the replacement color overlays as close as possible to the two colors not replaced. Moving the ring tabs together around the neck of the CRT draws the raster in small circles. Spreading the tabs apart moves the raster in more linear angles. The closer the tabs are together, the less affect on the CRT beam they have.

When the raster is as close as possible fix the magnets with paint or nail polish to prevent further movement.

After fixing the magnets, if gross geometry errors are apparent, geometry alignment is indicated. If the raster is close use the "Auto-convergence" feature provided in the consumer menu to re-align convergence. This should correct most minor geometry problems. Follow auto-convergence with the consumer red and blue centering adjustments, then evaluate the raster again.

In most cases convergence will now be acceptable. If only slight convergence errors are noted the technician should enter the manual digital convergence menu at V:80 and begin "touch-up" of the screen.

If gross geometry errors are still apparent re-evaluate whether the errors are noticable on the replacement CRT or whether they are global, affecting all three c CRT's. If the errors affect all three CRT's a full geometry alignment is indicated. If the errors only affect one CRT, particulary the replacement, return to the mechanical placement and centering ring adjustments and begin those procedures again.

Page 3-11

Page 26

DTV307

ALIGNMENT PROCEDURES (Continued)

Digital Convergence

There are four security locations associated with digital convergence. Their exact functions will be explained later.

They are: V: 76; The main service alignment location.

Contains the geometry alignments associated with convergence.

V: 80; The main digital convergence location. V: 82; PTV sensor positioning. V: 83; Restore factory Digital Convergence

values. V: 84; Save current alignments.

When the chassis is in service mode and digital convergence is active (V:80) the following remote control functions are enabled:

INFO; Toggles the convergence mode off after

alignments are completed

CH+/CH-; Adjusts the selected alignment point up

or down.

VOL+/VOL-; Adjusts the selected alignment point

right or left.

Cursor Arrow Buttons; Moves the cursor in the

appropriate direction.

SKIP; Toggles the convergence mode through the

following four states. Red to Green: Allows adjustment of red

convergence using the green pattern as a template.

Blue to Green: Allows adjustment of blue convergence using the green pattern as a template.

All: Allows adjustment of the green convergence. Provides a white convergence pattern allowing comparison of the pattern for more accurate results.

Green: Allows adjustment of the green convergence. This should be used only with a mylar template or strings placed on the front screen.

Figure 4 - Main Convergence Screen with Cursor at Center

Convergence Pattern

The convergence pattern displayed when in the digital convergence mode (V:80) appears as in Figure 4. Shown is the cursor at center screen. This is how the convergence pattern appears when the technician initially enters the digital convergence alignment mode.

CAUTION: DO NOT PRESS THE "OFF" BUTTON. THIS WOULD TURN OFF THE SET WITHOUT SAVING THE CONVERGENCE ADJUSTMENTS.

All other buttons are ignored by System Control and the Digital Convergence microprocessor during convergence alignment.

After placing the instrument in service mode, use either the remote control or the front panel button VOL UP to advance the right side screen number (V:) to 80. Then push CH UP. This places the instrument in digital convergence mode.

Page 3-12

Page 27

DTV307

ALIGNMENT PROCEDURES (Continued)

Convergence Mode

During digital convergence mode, the display will blank incoming video allowing only the digital convergence crosshatch pattern with the cursor at the center location. The initial adjustment is red. Green is fixed. Red and blue will be aligned to green.

The volume and channel buttons will provide adjustment of the selected cursor location up, down, left and right in single steps. The cursor position is indicated by a crosshair. The intersection of the highlighted crosshair is the alignment currently being adjusted. Note only a portion of the crosshair will be seen when it is positioned to adjust the off-screen points along the picture edges. Use the small line segments that extend to the picture edge to adjust these points.

NOTE: In the extreme diagonal positions, the cursor is invisible but the point is still adjustable. Do not adjust these off-screen corner points.

For best results, adjust the pattern beginning at the upper left of the screen. Then continue the adjustments from left to right and top to bottom as if reading a book.

The four navigation "MOVE" buttons adjust the movement of the selected color at the cursor point. They will move the alignment point for the selected color up, down, right or left. Adjust so that it is centered on green with minimum fringing on either side.

The "SKIP” button will toggle the display through 4 states:

Yellow crosshatch, Yellow cursor, Red adjustment, no other OSD or video.

2. Cyan crosshatch, Cyan cursor, Blue adjustment, no other OSD or video.

3. White crosshatch, White cursor, no adjustment available. Used to observe convergence results.

4. Green crosshatch, Green Cursor.

The PWR button returns the receiver to normal operation, however the adjustments are not stored to EEPROM. More on the actual storing of data to the digital convergence EEPROM later.

As previously discussed, there are also four service menu

locations associated with digital convergence. They are:

V: 80; The main digital convergence location.

V: 82; PTV sensor positioning. V: 83; Restore factory Digital Convergence

values. V: 84; Save current alignments.

V:80 is the main digital convergence menu. It contains an "all-points" adjustment procedure very much like the CTC195. When convergence alignments are complete, the technician exits this menu by pressing "On/Off" on the remote control or "Power" on the front panel. Convergence alignments for the selected scan mode are stored in the current mode EEPROM at this point and will be used until they are changed during the next menu V:80 alignment procedure or the consumer accesses the "Auto-Convergence" procedure. In that case, the original factory alignment data will be placed back into the EEPROM and the screen aligned to the faulty data.

To prevent this, once alignments are complete for the selected mode, the service menu must be entered again, this time V:84 will be selected. At V:84, press CH UP. This transfers the new alignment data for the selected deflection mode to the factory EEPROM. Then the service menu is decremented to V:82 and CH UP is again pressed. This starts a routine to allow the optical sensors located on the screen frame to "memorize" the new alignment data. It looks similar to the consumer "Auto-convergence" procedure. Once the routine is completed "Auto-convergence" will function correctly, returning the screen to the convergence setup by the technician. This new data becomes the "factory default" data from this point forward, only changing if a new set of alignments is placed into the EEPROM using the same procedure.

Menu V:83 performs the same convergence routine as selecting "Auto-convergence" from the consumer menu.

Digital Convergence Alignment Overview

There are four convergence modes in the DTV307 corresponding to the four deflection (scan) modes. Each requires complete convergence alignment and stores the alignment points in separate EEPROMS. There is also another EEPROM containing convergence data installed at the time of manufacture. It is always available to allow a "starting" point in cases where catastrophic failure of convergence data has occured. This EEPROM is larger than the others and contains reference data for all four scan modes.

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Page 28

BLOCK DIAGRAM

SCLM SDAM

SCLS SDAI SDAO ADS0

OSCL GRES

ECLK FILT

FLT2 SYNH

SYNV

REST

TEST

I2C

Master

I2C

Slave

Oscillator

PLL

SYS_CLK

Filter

Reset

Controller

Digicon III

RAM

Controller

Bus

Controller

Horizontal

Timebase

Vertical

Video DACs

Interpolation

Registers

D0...E2

Registers

E3...EE

Video Pattern

Generator

RGB

Registers

Timing

Gain Range

Control

Electrical

Loop

OPT

Port

dig.

Filter

dig.

Filter

Convergence

DACs

Focus

Processor

I/O Ports

Bandgap

Focus

DAC

DARH DNRH DAGH

DNGH

DABH

DNBH

DARV DNRV DAGV DNGV

DABV

DNBV

REFN

REFC

POUT

DACF

DNCF

MLIN

VIDB

VIDR

VIDG

OPTI

VBLK

OPTT

PORA

PORB

PORC

OGAH

TBU0

TBU1

TBU2

TBU3

TBU4

TBU5

TBU6

OGAV

TBU7

Page 29

DTV307

CIRCUIT OVERVIEW

AC IN

Three line chokes in series and capacitors across the outputs are used to provide Line Conducted Interference (LCI) suppression to the AC line. A full wave bridge is connected to the 60Hz ac line to provide Raw B+ to both the standby Zero Voltage Switching (ZVS) circuit and the main high power isolat ing regulator.

A provision for a Negative Temperature Coefficient Resistor (NTC) RT14202 may be used as a surge current resistor to c ontrol inrush curre nt through the diod es as the main electrolytic charges initially to minimize power and temperature.

Grounding of the 3-wire line cord is to the metal mechanical structure to which the main spark gap and audio/video grounds are connected.

Main Run Power Supply

Main Run Power Supply Operation

The main run power supply circuit operates in the Zero Voltage Switching (ZVS) mode to minimize radiated noise and to improve efficiency.

A high power output, single switch power supply requires a switching device that has a high curre nt rating and high breakdown voltage. The most cost-effective type of device for this application is a bipolar switching transistor, but bipolar transistor require a significant amount of base current drive in the forward direction, and even higher level of current during turn-off to ensure fast switching.

A simple proportional drive circuit that also provides a self-oscillating capability has been developed for the DT30X family. Proportional drive is advantageous

because it provides a relatively constant ratio of base current to collector current. This constant ratio prevents the switching transistor base from being overdriven in the forward direction during low current operation, thus improving the switching speeds. Proportional drive also provides increased base drive when high peak current is required from the switching transistor to ensure proper saturation to minimize power dissipation. This circuit operates in the forward mode because of the high power output requirements, providing energy to the secondary windings during the main switch cond uction interval. I n this implementation the primary winding of T14101, provides the means for the energy stored in the resonant inductor to be transferred to the output while the switching transistor is on.

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DTV307

CIRCUIT OVERVIEW

A high current latch provides a low impedance path for reverse base current to flow during turn-off. The latch is made up of Q14101 and Q14103 a PNP/NPN transistor pair. A negative bias on the base of the switching transistor, Q14100, is provided by the drive transformer, a series Zener diode, CR14105, and bypass capacitor, C14103, to improve reliability and switching speeds.

Oscillation is initiated by current flowing from a high value resistor R14103 connected to the Raw B+. It causes a small amount of base current to flow in the main power switch Q14100. A drive transformer T14101 is connected as a current transformer and causes current to flow in the secondary winding in response to the current flow in the primary winding. The ratio of primary current to secondary current is determined by the turns ratio of the drive transformer, about 7 to 1. Since additional current begins to flow in the base of the switching transistor from the secondary of T14101, additional current will flow in the primary and a regenerative effect will take place causing the system to self oscillate. The expected range of switching frequency is 80kHz to 120 kHz.

Switch Mode transistor current is sensed by an emitter resistor, R14100; the developed voltage is fed to the NPN/PNP latch. When the voltage across R14100 increases the base of Q14103 becomes sufficiently positive to cause it to turn-on. Current flowing in Q14103 causes Q14101 to turn-on diverting base current away from the Q14100 and latching Q14103. CR14105 and C14103 provide a negative voltage feedback to the base of Q14100 to improve the turn off characteristics of the main power switch.

a current path of the forward drive current and limits the voltage to which C14104 can charge. A negative base bias voltage is coupled to Q14100 through C14104 to Q14100 when it is in the off state. Diode CR14117 and C14121 bias and rectify and filter the negative voltage developed from the drive transformer, T14101, to provide a negative supply voltage for the control circuit.

A feedback signal from an error amplifier that senses the output voltage of the supply drives an opto-coupler with a variable current. The +76V supply is sensed via a resistor divider and fed to the reference IC U14101. As the output voltage increases above the threshold set by the error amplifier, the current through the diode portion of the opto-coupler increases causing increasing current to flow in the transistor portion. This increased current flow causes the voltage across C14112 to drop which in turn lowers the threshold at which Q14103 will begin to conduct, lowers the peak current in the switching device, and reduces the output voltage of the system until equilibrium is established.

Overcurrent Protection

When an overload appears, the current through (and the voltage across) the sense resistors approaches a sawtooth shape with nearly equal positive and negative amplitudes. The negative-going portion of this voltage is passed by CR14122 and lowers the voltage on the emitter of Q14103 that in turn lowers the maximum peak current that can flow through the transistor.

Standby Power Operation

Diode CR14108 and resistor R14117 shunt some of the reverse base current to the low impedance of the current sense resistor. This shunting effect prevents the overstressing the base of Q14103.

Q14102 and Q14103 remain latched until the current flowing through the pair drops below the latching threshold. The negative voltage produced by T14101 keeps the main switch mode transistor from conducting until the resonant action of the resonating inductor and the resonant capacitor, C14113, causes the voltage to reverse. As the voltage at the base of Q14100 rises, current begins to flow and the next cycle begins.

When Q14100 turns off, the collector voltage begins to rise but the voltage change is limited by the resonance effect produced by L14103 and C14113. Because Q14100 turns off very rapidly, very little power is dissipated since the collector voltage remains low during the turn-off interval. When the collector voltage of Q14100 resonates toward ground, the collector-base junction conducts and diode CR14128 provides a path for the resonant current returning to the Raw B+ supply after the resonant cycle is complete. Diode CR14115 provides

The standby power supply uses a ZVS circuit similar to the main run circuitry. It uses a flyback topology rather than the forward mode of the main power supply. A MOSFET, Q14601, serves as the switching device with the energy storage components the primary inductance of T14600 and the resonating capacitor, C14605.

+5VFB is sampled and regulated directly via the reference IC U14603 and opto-coupler, U14601. A transistor switch Q14604 is enabled by the +12v run in order to shed load in the standby mode.

An isolated supply (+8V_USB) provides the source for the USB 5v regulator that is located on the I/O board.

Provisions ha ve been made for powering a tuner with the +15vs, +33vs and -12vs. The +33vs is switched on by the +12vr.

On sets supporting GemStar99, a 9VS standby source is provided from +15VS via a dropping resistor to form an unregulated +12VS. This supply is fed to a switched +9V

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DTV307

CIRCUIT OVERVIEW

signal regulator. This regulator can be activated during RUN and Acquisition modes.

A power fail circuit with output, PWR_FAIL senses an unregulated negative supply (about -15 volts) that is proportional to the Raw B+ input. PWR_FAIL is asserted when the Raw B+ is no longer sufficient to guarantee regulation of the output voltages. The output voltages will remain in regulation for a minimum of 20 ms after PWR_FAIL is asserted.

Keyboard & IR

DBS Antenna

RF Input A

RF Input B

RF to PIP

tuner

TV Ctrl

PIP Tuner/IF

PIP Comp. Vid.

Video Inputs

S-Vid Inputs

TV Ctrl

NTSC Video Switching

Data Slicer

for CC and EDS

TV Ctrl

Main Composite NTSC Video

Main

Comb,

PIP, &

PIP

Chroma

Decoder

TV Ctrl

TV chassis control

EEROM

TV uP

Serial Aync I/P Comm

Power Supply/ Deflection / Converg.

LNB Pwr

DTV306 Block Diagram

Degaussing

Automatic Degaussing is provided via a PTC connected is series with the AC line and contacts of a relay. When the main power ZVS is activated by the on/off line, the +12v supply rises and the transistor, Q14250, driving the relay coil is saturated until the electrolytic capacitor, C14250, charges to the value determined by the base divider resistor. This differs from earlier chassis in that the opening of the relay is determined by time constant rather than uC control.

DM1

Y Pr Pb

Convergence OSD

Pol Ctrl

"2H" Video

Processing

Sandcastle/ Beam Limiter

PFail StatusPol Ctrl

Main Analog Audio

2 Chan Audio

TV Ctrl

Audio Inputs

Audio Switching

CRT/Defl.

Drivers

TV Ctrl

Audio

Amps

Audio

Baseband

Processing

(Analog)

To CRT

To Defl. Yokes

Color Codes

TV Chassis Boards

To Internal Speakers

To External Speakers

TV Ctrl

Audio Line Out

To FP A/V Headphone

Second Tuner

The CTC197 2nd Tuner (PIP) module is used for the DTV307. The tuner is a cold version of the CTC185 tuner. It receives its signal from the RF splitter output on the DM1 module.

Composite Input Switching

The Composite Video Switching supports three rear jack panel inputs, a front panel input and two composite signals from the NTSC tuners. A matrix switch, U16501,

performs Composite Video switching. This arrangement will allow any Composite Video (CV) signal to be displayed as the Main or PIP Insert Picture.

The eight inputs to the CV Matrix switch are:

• Main Tune r CV

• PIP Tuner CV

• AUX-1

• AUX-2

• AUX-3

• Front CV

• Main Y

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DTV307

CIRCUIT OVERVIEW

• Y from the YPrPb Input

The outputs are:

• Main CV

• PIP CV

• CV signal to the data slicer in the micro

The Closed Captioning (CC) Video output can be any of the available CV inputs or the Y from the displayed SVideo or YPrPb signal.

S-Video Input Switching:

The S-Video Switching supports three rear panel jacks, sharing the audio inputs with their respective CV inputs. The combed Y/C from the optional Frame Comb is also input to this switch. An auto detection scheme will select S-Video over CV if sync is detected on the corresponding Y/C input. The Y/C from the Comb Filter is input at the S-Video Switch in the F2PIP. This allows the Frame Comb input to be hard wired. If the control system detects the Frame Comb IC at power up it will configure the switches for Frame Comb operation. Otherwise the Comb in the F2PIP is utilized. A matrix switch, U16500, performs s-Video switching. T he 8 inputs to this switch are: S-Video-1, S-Video-2, S-Video-3 and the Frame Combed Chroma and Luminance. Two pairs of Y/C outputs are selected and routed to the S-Video switch located in the F2PIP IC. This will allow the display of two S-Video sources as main and insert channel. In normal operation one Y/C input is used for the main display and the second is used to poll the other S-Video Inputs looking for sync.

F2PIP and Comb Filter

The F2PIP IC, U18100, performs both the Comb Filter and the PIP function. A three input S-Video switch is also included inside the IC. The two main inputs, Y1/C1 and Y2/C2, are fed from the S-Video Switch. The third Y/C input is from the Line Comb in F2PIP. The Video Control IC, U22300, generates a Sandcastle pulse at pin 2 from which a suitable Horizontal Drive pulse is derived. This combined with the Vertical pulse present at pin 31 provides a Composite Blanking pulse to synchronize F2PIP. The presence of sync on Y1 and Y2 can be determined over the I2C Bus and used to control the auto S-Video select. On chip A/D’s, D/A’s, PLL’s and Memory make the F2PIP a one chip PIP solution. The F2PIP IC contains an Adaptive Comb Filter for the main picture as well as content screening and captioning for the PIP.

The Comb Filter receives Composite Video from the CV Switch. After the sync tip is clamped the signal is digitized to 8 bits. The sample clock is at 4 Fsc and phase locked to the main channel burst. The Digital comb, with

two 1fH delay lines, adaptively separate the Luma and Chroma signals that are then converted back to analog. The Y/C signals are low-pass filtered externally to remove repeat spectra and routed back into the S-Video Switch in the F2PIP. Vertical peaking is provided with bus controlled gain. The CV Output and Y/C Input to the SVideo switch allow for an optional Frame Comb Module to be used to circumvent the comb filter inside F2PIP.

The Video signal to be inserted as PIP may be a Composite Video signal or a signal made by internally summing either of the two S-Video inputs. Because this is a one-clock system, the PIP signal is sampled by a clock that is locked to the burst of the main signal. If burst is not present on the main channel, F2PIP can create its own burst. Following the sampling process the composite signal is internally band-passed and low-pass filtered for Y/C separation. If the chroma carriers are similar in frequency a digital PLL allows demodulation of the PIP chroma. The PIP Y/U/V samples are stored in memory and are read out synchronized with the main picture. The PIP picture consists of 69 lines with 108 luma and 18 pairs of chroma pixels. The PIP controller also generates a Fast Switch signal that is used to control the Y/C overlay switch inside the FPIP IC. It is also used to defeat Black Stretch during time PIP is displayed.

A 1/9 size NTSC PIP can be placed almost anywhere on the main NTSC raster.

YPrPb and Digital TV interface

A three input ganged RCA jack, J22401, provides for a YPrPb or “YUV” Input. This signal is input after the chroma decoder so that the 1.0fH to 2.14fH signals can be directly processed, eliminating the chroma encoding and decoding process. The 1.0fH Y or luma signal contains standard NTSC sync. The 2.0 and 2.14 fH signals have tri-level sync and because of their line frequency require special processing. The NTSC and External YPrPb signals are switched and clamped using two CD-4053 IC's, U22402 and U22403, before being routed to the Digital Interface. The discrete clamp switch is required to allow choosing the clamping level and send it as a “Black Reference” to the DM-1 module via J22403. The VGA2_NTSC / VGA1_YPRPB control line selects NTSC or YPrPb and is shared with the VGA switch since they are mutually exclusive. The YPRPB_Y signal is routed to the CV Switch to allow decoding of Closed Caption data on the YPrPb Input.

The Y signal is routed directly to U22407, which generates the required Horizontal and Vertical Drive signals. This IC also generates a Composite Blanking signal, BLK_1300 and a Black Stretch Blanking and Clamp Key signal, SCP_1300. These two signals are used to drive the Video Control IC, U22300 for all 1.0, 2.0 and

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DTV307

CIRCUIT OVERVIEW

2.14 fH signals. This allows idea control of the Blanking, Black Stretch and AKB in these modes. For NTSC operation U22407 is locked to the NTSC_H and NTSC_V signals coming from the Video Control IC, U22300. For YPrPb operation the YPRPB_H and YPRPB_V are routed to deflection.

In the DTV307 NTSC, YPrPb or the DM-1 signals are selected. J22402 provides differential YUV signals. U22404, U22405 and U22406 are configured to convert these to single YUV signals. For Digital TV applications U2204 is configured as a two input YUV switch by connecting the Matrix to ground through R22412. DIG_2H and DIG_1V are the respective Horizontal and Vertical Drive signals from the DM-1 module.

NTSC Chroma Decoder and Back-end Processing

The main NTSC decoder and wide band video processing is handled by U22300 a Video/Chroma/Deflection processor IC. The U22300 processor accepts the separated luminance and chrominance signals from the comb filter. The chroma path has a selectable peaking circuit inside the IC. The Q and center frequency is under bus control. These are adjusted to compensate the response from the various video inputs, including RF, CV and S-Video. The luma path has a selectable 3.58 trap with delay line.

U22300 is alignment free. Because the tint function is performed at base band there is no tint-preset register available for NTSC. Following demodulation, the I/Q or U/V output signals are internally low-pass filtered and routed to the NTSC/1H_YPrPb switch. For Auto-flesh operation the IC must demodulate on the I/Q axis. The internal matrix can accept U/V or I/Q signals but its input follows the selection of the NTSC demodulator. With the present Matrix, the Auto-flesh will only operate on 1.0 fH NTSC. In the U/V mode signals are routed around the auto-flesh circuit. Only customer presets need be aligned.

Internal to U22300 is a horizontal and vertical sync processor. The horizontal and vertical drive pulses are used to drive the deflection in the 1.0 fH mode. An internal PLL generates a stable Horizontal Drive pulse. A vertical count down scheme is used to generate a stable Vertical Drive pulse. I read the status of the HPLL, the field frequency and power on reset condition.

The Back-end Processor IC accepts YIQ (NTSC) or YUV video and enhances it with the following functions:

1) User controls for pix, black level, sharpness (with noise coring), color saturation, and tint.

2) Black stretch with auto-pedestal expands blacks to full dynamic range.

C bus registers are available to

3) Edge replacement sharpens the luma edges.

4) SVM processing to enhance edges

5) Noise reduction to improve appearance of noisy sources

6) Auto-flesh is available, for NTSC signals only, to minimize scene to scene variations in tint

7) AKB (Automatic Kine Bias)

8) Beam current limiting

OSD for both 1H and 2H comes in following all user controls.

The Red, Green and Blue outputs from U22300 are clamped to prevent Blanking from going below 1.1 Volts. The Low-Pass filters remove unwanted harmonics a computer input may have. A reference voltage is provided for common mode rejection at the Kine Driver IC’s. The AKB operation can be controlled over the I Bus; this includes off /on and AKB Gain. With AKB off the Bias and Drive controls can be used to set color temperature. With AKB on, the bias controls set the reference input to the AKB. The AKB circuit generates Red, Green and Blue pulses at the top of the raster. The control loop moves the bias to match these currents to the reference set by the bias controls. In order for the AKB to operate U22300 must recognize the start of Vertical. The Horizontal and Vertical portions of the Blanking input, pin 25, times the AKB interval. The horizontal rate Clamp Key at pin 24 is also used in the timing generation. The AKB output pulse present at Pin 17 is used to blank the Dynamic Focus to prevent contamination.

The SVM low-level signal processing is also controlled by the I correction can be adjusted for different modes or conditions. The SVM signal is only present when the Peaking is activated. The SVM mute threshold is 0.75 Volts on the OSD Fast-switch. The OSD switching occurs at 2.25 Volts. This allows the SVM to turn off before the OSD is displayed and removes OSD before turning SVM back on. This prevents the OSD edges from being modified by the SVM.

C Bus. The SVM timing, gain and parabola

Picture Tube Management System

The DTV307 product uses 3 Philips TDA6120Q Integrated Circuits for the Kine drivers, U15101, U15102 and U15103. The overall gain is approximately 38dB (x77) for DTV307. The CRT drivers will be used with 27", 32", 34W, 36" and 38W DV tubes. AKB & Beam Limiting is provided by the Back End Processor, U22300. A current reference for AKB is DC coupled from each IC driver. A current reference for the Automatic Beam Limiter is provi ded through the High Voltage Circuitry.

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DTV307

CIRCUIT OVERVIEW

The RGB output section of U22300, the CRT driver circuitry, the ABL circuitry, and the AKB circuitry make up the Picture Tube Management System.

R,G,B bias controls and R(G),B drive controls are available. The R(G) control is a register that controls either the Red or the Green Drive. The Drive that is not being controlled is set to nominal. U22300 also provides an analog AKB system. The low-light color temperature is aligned by adjusting the AKB reference levels.

Afterglow prevention is provided by a grid kick circuit and a Kine driver IC cut-off circuit that operates when there is a decrease in the +12VR supply voltage. The ABL section of U22300 and its associated circuitry will limit the average beam current through the picture tube to limit HV power.

The AKB system does compensate for Picture Tube leakage current due to the method of DC current addition and restoration.

DTV307 I/O Board Audio Circuitry

Aux. Inputs

The following audio inputs are present as jacks, that are connected electrically to the input switching circuit CMOS switches (U11400, U11401) of the Audio I/O Board. The CMOS switches are controlled by the system micro, in response to customer commands:

Stereo Audio Inputs 1, 2, 3

Three pairs of right/left audio inputs, (J16501, J16502, J16503), each pair clustered with a video input RCA-jack and one S-video jack.

Front Audio/Video Input

Allows a camcorder to be plugge d in dir ectly, via a stereo pair of RCA phono jacks. (J26104 on Front A/V board). It has stereo audio capability, and is a selectable audio input. The front A/V board interfaces to the I/O board via differential coupling (U11402) or each channel.

RCA-Jack YUV Stereo Audio

A pair of clustered input jacks (J11403) is used to input stereo audio from YUV digital video/audio source.

This IC contains five main functions:

1. SELECTOR SWITCH

2. STEREO VOLUME CONTROL

3. STEREO SPEAKER FADER CONTROL

4. TONE CONTROLS

5. IIC BUS EXPANDER DIGITAL OUTPUTS

6. MUTING

SELECTOR SWITCH:

This is used to select between the following signals:

1. The selected signal being applied both to the

Selected Outputs and the HI FI Outputs, as well as the signal applied to the headphones and speakers.

2. All selected NTSC input signals, coming from the

input CMOS switches.

STEREO VOLUME CONTROL:

The volume control is a 1.25dB/step control with approximately 80dB of range. This linear control will be modified (in software) by a volume taper curve so that the volume OSD (on screen display) gives the desired customer “feel”. This block also includes speaker fader and bass/treble controls.

SPEAKER FADER

This is utilized for a right/left balance control. It is also used for the Customer Mute function.

TONE CONTROLS

The bass/treble is used as a standard function without graphic equalizers.

IIC bus expander outputs

This pair of outputs is used to control muting of the power amplifier (Speaker Mute) and muting of the Aux. Outputs and headphone amplifier (Aux. and Headphone Mute). Outputs 1 (pin 8) and 2 (pin3), respectively.

MUTING

The main customer MUTE function is accomplished by ramping the volume control do wn at a rate which will not cause audible pops when a 1khz sine wave tone is present. The proper rate for this is 1 step/ms. In addition, the Speaker Volume should be ramped down at 1 or 2 steps per ms. after the main volume is ramped down.

NTSC Stereo Audio Inputs

A pair of differential input amplifiers (U11402) are used to accept differential Left and Right NTSC audio signals from the stereo decoder from the DM1 module.

AC-3 Interface (Rt, Lt AC-3 inputs)

Differential amplifier inputs (U11404) and outputs (U11403) are provided for the DTV306.

Volume/Tone Control Function, U11800

SRS Function

The SRSâ (Sound Retrieval System) function is accomplished by filtering, phase inversion, and summing circuits made with U11700 and U11701, and their associated circuitry.

The opamp stage, U11701A, buffers the left channel signal. U11701D inverts the right channel signal. The buffered left and inverted right channel signals are

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DTV307

CIRCUIT OVERVIEW

summed through R11723 and R11726, then filtered by the RC network consisting of R11712, C11706, R11725, and C11702. The impedance of the filter network is considerably higher than that of the summing resistors, in order to minimize component interactance. The filtered response has a midrange cut of about 10dB. The filtered stereo difference signal is then buffered by U11701B.

The left and right input signals are summed by R11714 and R11735 and form the stereo sum signal. This stereo sum signal is buffered by opamp U11701C.

The SRS difference signal filter function is switched in and out using the CMOS switch, U11702. It is controlled by transistor Q11701. At the same time, the sum signal gain is changed by saturated transistor switch Q11702 connected to CNTL_C of U11702. These switches are controlled in response to the digital "SRS_ON/OFF” signal and "SRS_FOCUS" from the micro.

When the SRS function is turned OFF, the gain and frequency response of both the sum and difference signal are flat, which renders normal stereo channels at the outputs of opamps U11700-A and B.

Pop-reduction (muting) of the RCA-jack output signals occurs during power on/off by grounding the inputs using bipolar transistors as analog switches. A dedicated circuit (Q11300, Q11302, Q11308 and associated circuitry) responds to both the +5V Standby and +12V run supplies. The standby supply is used to charge a large electrolytic capacitor through a diode. When power drops out the voltage on this electrolytic remains relatively constant for a significantly longer time period than the voltage on the +12V run supply. The stored charge on the +5V standby electrolytic is used to turn on muting transistors Q11901, Q11902 into saturation, this short out the Aux. Out and Headphone Amplifier signals. This muting prevents large-amplitude transient voltages from reaching the inputs to external power amplifiers.

Amplifiers

Headphone Amplifier

The Headphone Amplifier (U11900) doubles as the HIFI output amplifier. The stereo headphone jack connects to the U11900 outputs, and is located on the Front A/V panel.

Compression Function

The compressor function is implemented by software control of the volume control IC U11802, in response to the dc voltage amplitude present at the output of the Compressor Detector circuit, based around opamp U11500. The dc voltage that is present at the detector output is proportional to the peak value of the audio signal. The detector output is connected to an A-to-D converter in the control micro.

Outputs

RCA-Jack Outputs

Two pairs of RCA-jacks provide two-channel stereo audio from the current program (large picture audio only, no PIP audio available). The “HIFI” output signal, J11301, is first processed by SRS, “Sound Logic” compressor, and TVB control before being passed to the output jacks. The HIFI output amplifier is also the Headphone Amplifier. The “Selected” and “NTSC Selected” output signals are routed straight through from the input switches, and are not processed.

The “Selected Outputs #1”, J11300, are selected by the input switching circuit of the TVB IC, U11802, selecting the selected NTSC signals from the input switching circuit, U11400 and U11401. The “NTSC Selected” Outputs (J11302) consist only of NTSC signals from the input switching circuit, U11400 and U11401.

Power Dropout Mute Circuit

The headphone-input signals are muted during power on/off by grounding the inputs using bipolar transistors as analog switches. A dedicated circuit, Q11300, Q11302, Q11308 and its associated circuitry, respond to both the +5V Standby and +12V run supplies. During momentary power outages and during normal power-up/power-down, this circuit drives the headphone amplifier input transistors Q11901, Q11902 into saturation. This muting prevents large-amplitude transient voltages from reaching the inputs to external power amplifiers or to the headphones.

PWM (Pulse-Width-Modulated) Power Amplifiers

The power amplifiers are monolithic IC’s (U11901, U11902), which are “PWM” switchmode power amplifiers. Each channel provides nominal 10 watts of power into an 8 ohm loads. No heatsinks are required, as efficiency is greater than 85 %.

PWM Amplifier Operation

A triangle-wave generator operates at approx. 150 kHz. This triangle waveform is applied to one terminal of a high-speed comparator. To the other terminal is applied the analog signal to be converted to PWM. The output of the comparator is PWM. This PWM signal is applied to a push-pull output stage.

In order to realize the power-saving advantage of the PWM design, the PWM waveform must be integrated before being applied to the resistive speaker load, otherwise full power will be delivered to the load at all times, even when there is no audio input signal present. A

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DTV307

CIRCUIT OVERVIEW

two-pole L/C lowpass filter is set to 15khz to remove the high frequency compo nents of the signal.

Negative feedback is picked off at the filter output and applied to the appropriate upstream node to reduce distortion and output impedance.

Mute/standby operation

Power amp muting circuitry consists of Q11906 and its associated circuitry. The muting circuit responds to control signals from the TVB IC, U11800, pin 8, which is controlled by the IIC bus.

Speaker Outputs

The stereo power amplifiers connect to either external speakers or internal speakers, depending on setting of

DM1 MODULE

The DM1 module in the DTV307 is used to process the various types of Digital and Analog signals present in today's broadcast world. It can decode digital audio and video from Direct Broadcast Satellite (DBS) and terrestrial ATSC Digital Television (DTV) transmissions.

EXTERNAL/INTERNAL DPDT speaker selector switch. This electromechanical switch is located on the rear panel of the I/O board for customer access. In the “EXTERNAL” position, the main power amplifier outputs are connected to the External Speaker jacks. In the “INTERNAL” position, the main power amplifier outputs are connected to the internal speakers.

AVR (Automatic Volume Reduction)

The AVR function is used to protect the loudspeakers from excessive power levels. A level detector circuit (Q11904 and related circuitry) provides a two-state digital signal, the state depending on the output voltage amplitude from the power amp. The digital signal is connected to one of the inputs of the system control microprocessor, where its state is polled by the system microprocessor.

It can also digitize the analog audio and video from standard NTSC sources, such as cable and terrestrial broadcasts. The DM1 includes an integral control-system, user-interface and on-screen display (OSD) functionality.

DBS Antenna

RF Input A

RF Input B

DBS Tuner / IF

HD / NTSC Tuner / IF / Splitter

RF to PIP tuner

Main Composite NTSC Video

I2C

QPSK

I2C

VSB

I2C

Stereo Decoder

From Comb,

PIP, & Chroma Decoder

DSS Link

HDTV Link

Main Analog Audio

I2C

Serial Aync I/P Comm

I2C

NTSC YUV A/D

Serial Link Interface

Link MUX

I2C

PFail Status

MPEG Video Decoding / NTSC Video Upconversion / OSD

YCrCb

HSVS

D/A & Filter

MODEM Telco

Pol Ctrl

Handshake

Y Pr Pb

NRSS/iso7816

Handshake

ARM/Transport

User Interface and Control for "Digital Package"

Data

Address

8822

Convergence OSD

DRAMROM

Audio Switching

Audio A/D

MPEG/AC-3 Audio Decoder

SDRAM

Color Codes

DM-1 (AV/Dec)

DM-1 (Tuner/Link)

2 Chan Audio (Analog)

Audio D/As

2 Chan Audio (Digital)

EEROM

TOSLINK Output

I2C

DM1 Block Diagram

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CIRCUIT OVERVIEW

Video is up-converted and output as analog YPrPb (Y, IQ for NTSC sources) at 2H for NTSC signals and 2.14H for digital video signals in one of the following formats:

video source output format vertical rate

high-definition MPEG 1920 x 1080i 29.97/30 Hz standard-definition MPEG 1920 x 540p 59.94/60Hz analog NTSC 1920 x 480p 59.94/60Hz

Audio processing includes full 5.1-channel AC-3 decoding, Pro-logic decoding and down mixing. Audio is output as analog baseband signals, as an optical AC-3 digital signal, and as an optical uncompressed digital PCM signal.

NTSC Tuner (DM1)

The main NTSC tuner in the DTV307 is included in the DM1 module. The DM1 DTV/NTSC tuner is a single conversion, electronically aligned tuner that is based on the CTC197 cable tuner design. Design changes were made to improve cross-modulation, UHF image rejection, and local oscillator phase noise performance. Performance is tailored to handle the predicted signal environment during transition to digital terrestrial television (HDTV) service as well as providing “cable ready” performance as specified by the FCC. This tuner resides on the tuner/link board within the DM1. The tuner in the DM1 is preceded by a RF switch/splitter that sends the RF to the DM1 Tuner and to the PIP Tuner (Second Tuner).

The tuner IF output drives both a digital IF (HDTV processing path) and an analog IF (NTSC processing path).

Digital IF (DM1)

The digital I F converts IF frequencies t o near base band frequencies. It is designed for use with systems receiving QAM data transmissions. It also includes a RF AGC for the tuner and accepts an external AGC line to control its output amplitude.

The combination of SAW filters, buffer and amplifiers are designed to provide maximum adjacent channel attenuation, while preserving the desired passband characteristics.

Stereo Decoder (DM1)

The stereo decoder is designed to decode MTS broadcast stereo. Functions include stereo demodulation and SAP (Separate Audio Program) demodulation. The stereo demodulator is a true MTS decoder, containing a dbx expander that processes the compressed broadcast stereo difference signal.

A quad op-amp IC is used to convert the left and right channels to balanced differential outputs. This is done to minimize EMI susceptibility, particularly 2H flyback pulses, that are likely to be picked up in the relatively long interface cable between the stereo decoder outputs and the power amplifier inputs.

A/D HDTV (DM1)

The analog to digital conversion sub-system (A/D) of the HDTV system is responsible for converting the VSB modulated near-baseband output of the digital IF downconverter to a 10 bit wide digital signal, to be decoded by the VSB Link sub-system. The analog input shall be AC coupled, and the A/D subsystem will provide its own independent biasing for proper DC input level.

VSB Link Subsystem (DM1)

The VSB Link subsystem is responsible for demodulating and decoding 8 VSB signals that have been downconverted to near-baseband and then digitized by the A/D subsystem. The VSB Link IC accepts 10 bit wide data bus from the A/D subsystem and contains circuitry for digital demodulation, FEC decoding, and serial output of the decoded data. The VSB Link IC also controls AGC and symbol timing functions through control of external analog circuits.

DBS LINK subsystem (DM1)

The Link subsystem contains the circuitry required to demodulate, correct errors, and output data received from the satellite signal. In particular, the Link subsystem contains the Satlink IC and some small amount of analog circuitry needed for AGC control and clock generation. The Satlink performs A/D conversion, digital demodulation and error correction.



NTSC IF (DM1)

The NTSC IF is active for reception of analog television signals, and inactive during the reception of digital (HDTV or DBS) television signals. There are two separate channels, PIF and SIF, for the picture and sound signals.

YPrPb Output (DM1)

The video D/A converter receives from the HD MPEG decoder an 81 MHz clock signal and three video data signals (Y, Cr, Cb), each on an 8 bit bus. (Cr and Cb are scaled versions of color difference signals (R-Y) and (BY) respectively. When converted to analog signals they are called Pr and Pb.) The D/A converter outputs analog

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DTV307

CIRCUIT OVERVIEW

Y, Pr and Pb signals that are low-pass filtered before further processing.

In the DM1 the Y, Pr and Pb signals are converted from single-ended to differential form by three dual operational amplifiers, which provide positive and negative polarity output signals. Other outputs are buffered H drive, V drive and OSD active signals from the HD MPEG decoder.

Video Digitizer triple A/D converter (DM1)

The main component of the video digitizer combines the functionality of a triple ADC and a clock sync generator. The Video Digitizer circuitry consists of a single IC containing three separate 8-bit analog to digital converters for processing standard (YP applications. The digitizer also contains the necessary clock generating and sampling circuits for proper sampling clock and sync signal creation during the A/D conversion. The sampling rate of conversio n i s 27 MHz.

) NTSC analog video

RPB

AC3/MPEG/PCM AUDIO AND ANALOG

INPUT/OUTPUTS (DM1)

The audio decoder is a general purpose DSP IC with ROM specific to the HDTV program. It obtains compressed packets of input data from the ARM Transport or non-compressed PCM data from the audio A/D converter. The processed data is then sent to the D/A converters via the Serial Audio Interface. The audio decoding modes supported are:

1) DSS stereo MPEG-1 layer 2 elementary stream with system layer syntax for PTS.

2) DSS multi-channel AC-3 elementary stream with MPEG-2 PES for PTS.

3) HDTV multi-channel AC-3 elementary stream with MPEG-2 PES for PTS.

4) NTSC stereo A/D input with a time delay to compensate for video 1Fh to 2Fh conversio n delays.

Additionally to the above listed audio decoding modes, Pro Logic decoding can be performed on two-channel sources to generate multi channel output.

The optical digital audio output is known as “TOSLINK”. The optical transmitter can drive a 5M or 10M cable depending on the receiver module sensitivity. The format of the optical output can be either compressed AC-3 data or non-compressed PCM data.

POWER SUPPLY (DM1)

The power supply used for the DM1 is a flyback-type, current-mode controlled, zero voltage switching (ZVS) topology utilizing a discrete control circuit and cold-side regulation. The circuit is functionally similar to those used for other digital box applications, but has incorporated post-regulators for the 3.3 volt, 12 volt, and

-5 volt supplies to provide adequate regulation for large load variations and to reduce the ripple content of the supplies.

The 21 volt output supplies the LNB switch mode post regulator that has a selectable output voltage. The Output voltage ranges for RHCP selected are 11.75 V to 14.0 V,

13.5 volts nominal, and for LHCP selected, 16.75 V to

21.0 V, 18.5 volts nominal. The LNB output voltage is determined by a logic level input. RHCP is selected with a logic LOW on the LNB_CT L pin and LHCP is selected with a logical HIGH. The 21 volt output also supplies the fan output thro ugh a series zener diode.

A three-terminal error amplifier IC senses the 5 volt supply and provides feedback to the control circuit through an opto isolator. A power-fail signal is provide d to provide advance warning of an imminent supply voltage dropout.

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PTV Digital Convergence Overview

The digital convergence system began in the CTC195 is carried forward to the DTV307. Again, 195 points may be independently adjusted in red, blue and green via software control to achieve an optimum picture for both geometry and convergence. The complexity, however, is greatly increased due to multimedia operation and the addition of an auto-convergence feature, Intelifocus. The DTV307 is a 16 x 9 HDTV receiver that operates at one of two horizontal scan rates. Each of these scan modes requires a separate convergence and geometry alignment. The data for each scan rate is stored in a separate convergence “mode” EEPROM.

Auto-Convergence ( INTELIFOCUS )

The auto-convergence system replaces the manual customer centering system used in the CTC195. When the TV is moved, auto-convergence should be run in each mode that is to be used to correct the picture distorting effects of the local magnetic field. When AutoConvergence activates, the factory EEPROM data that corresponds to the present horizontal scan frequency loads to the convergence IC and the edges of moving lighted color blocks locate 8 optical sensors that surround the screen. New convergence values for all 195 grid points are then calculated by the convergence micro processor so that the three pictures are restored to their factory aligned positions with respect to the optical sensors. The PTV adjustment menu allows fine adjustment of red to green and blue to green at the picture center to optimize the center convergence. After an adjustment, the convergence values are recalculated to restore the edge positions. The center moves to the new adjusted position, the edges remain fixed and points in between move to blend the two.

Auto-Converge Operation

The optical sensors are photo transistors located just outside the viewing area in the screen corners and at the center of each screen edge. They are aimed to look at the 3 projection lenses. From the point of view of each sensor a very small area of the picture corresponding to the sensor location is visible through each of the 3 lenses. The sensors only care if this area is dark or lighted. Each photo transistor conducts current in proportion to the light intensity reaching it. All 8 sensors are connected in parallel to one detector. The auto-convergence sequence starts with a black screen. Starting at maximum sensitivity, the detector sensitivity is reduced until all sensors are off. This process measures the ambient light reaching the sensors through the screen. If the ambient light is too great, the light from the projection lenses will not be detectable. A green square lights in the upper left corner of the screen and brightens until the green lens light is seen by the upp er left sensor. The green light must be brighter than the previously measured ambient light to

be detected. If maximum green drive occurs before light is seen, the process is stopped and a “No sensor detected, debug system” error message is displayed. Once the upper left sensor is detected the other sensors are checked in all 3 colors in a quick clockwise rotation. Red and Blue sensitivity is then adjusted at each sensor, again moving clockwise. Edge location is done by lighting a small rectangle in one color and moving its edge across the sensor with a full raster convergence deflection. The light edges always move so the sensors are initially dark and then lighted. Edges are detected from different directions and averaged to cancel out errors due to focus and video response. The screen edge centers are measured with 2 horizontal and 2 vertical light edge detections. During raster movement each deflection position requires 3 fields of video to detect light. The edge location sequence begins in the upper left in green and proceeds clockwise around the screen. It is then repeated for red and blue.

Auto Convergence Circuit Description

As in the 195 the Digital Convergence system generates 6 convergence yoke drive signals that correct the geometry of the 3 rasters. Each of the three colors includes a matrix of 13 vertical points by 16 horizontal points (208 convergence points) stored in nonvolatile digital memory. 195 of these are adjustable. At turn on or during a mode change, the appropriate non-volatile digital memory information is transferred to DigiCon IC RAM memory and is converted by the DigiCon IC into 6 analog signals (horizontal and vertical for each of the three CRT'S) that are power amplified to supply the drive current for the convergence yokes. Since there are only 13 adjustable horizontal lines defining the entire vertical scan, signals for scan lines that are between the adjustable lines are calculated by the IC using interpolation. In the 307 the vertical interpolation is smoothed across the adjustment lines so as to eliminate discontinuities in line density. This eliminates horizontal banding and allows near perfect geometry to be achieved. With banding gone, point by point green adjustment via the TV remote control is feasible and can be done with the service menu 80 green or white displays. In the horizontal direction the DigiCon IC output is digital steps that must be smoothed by low pass filtering. The low pass filtering is done in the IC using 6 digital filters. Adjustments interact with points to the right of the point being adjusted due to the limited frequency response of the convergence power amplifier.

All data values are adjustable via IIC bus commands. Each data point can be individually changed (dynamic

adjustment) or the entire raster of a color may be moved (static adjustment). Several different video test patterns are generated by the digital convergence IC to aid in the customer and service adjustments. Customer patterns consist of a crosshair pattern used to center the red and

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DTV307

blue CRT's to the green and the auto-converge patterns. Technicians have access to the digital convergence colored grid patterns of service menu 80.

Electrical Stability Loops

New for the DTV307 convergence is a gain adjusting and voltage offset canceling drift elimination system. For each of the 6 yoke signal channels a scan line located near the center of vertical sync is supplied with standard test signals. This line is called the “Measuring Line”. The test signals produce a voltage on the corresponding yoke current sensing resistor. The test line signals alternate between a known voltage derived from the convergence IC internal voltage reference to determine gain and a ground voltage to de ter mine volta ge offse t. Re d, b lue and green are measured simultaneously, first for vertical channel gain and offset with horizontal channels turned off and then for horizontal channel gain and offset with vertical channels turned off. The signa l gain and voltage offset for each channel are automatically adjusted inside the convergence IC to track and cancel any variation that might result from temperature changes or component aging. Setting of the loops causes a short temporary shift in convergence after a mode change.

Convergence Power Supply Self-Resonant Converter

The first conduction cycle of Q19701 is started by the gate capaci tance being charge d up from Raw B+ through R19701. When Q19701 is turned on, current flows through the pri mary winding, Q19701 and R19706. The current will have a slope determined by the primary inductance. When the voltage across R19706 ramps up such that Q19703 turns on the off cycle begins. When Q19703 turns on, Q19702 also is turned on thus pulling the gate of Q19701 low. The combination of Q19702 and Q19703 is in the form of an SCR latch. When Q19701 turns off, the energy stored in the transformer is supplied to the secondaries and the pulse winding. The polarity of the pulse winding pushes the gate negative and unlatched the SCR formed by Q19702 and Q19703. With a complete transfer of energy to the secondary, the voltage wave for the drive pulse goes positive. This positive waveform with an added DC supplied by C19719 causes Q19701 to turn on again.

accomplished by developing a negative supply from the pulse winding

ON/OFF Control/Supply Startup Delay

When raw B+ is present, transistor Q19704 is biased on by raw B+. This transistor holds the gate of the Q19701 low thus preventing the power supply from starting. The 12V run signal from the chassis is used as an on/off signal. This voltage is compared to a slice level of ~7V by a comparator formed by Q19705 and Q19706. When the on/off voltage passes ~7V, current is allowed to flow through U19702 shorting the base of Q19704. This allows the power supply to start. The circuits at the base of Q19709 form a delay circuit to allow the power supplies to start up. Initially the current flowing through U19402 is directed through Q19709. This continues until the delay capacitor (C19705) charges up. At this point Q19709 turns off. After the supply has started the current through U19702 is directed through Q19710.

Secondary Voltage Detection

As mentioned in the previous section, the current through U19702 is directed through Q19710 when the supply is up and running. This t ransistor is turned on only when the +20V supply is in a certain voltage range. CR19706, CR19707 and CR19720 set this range. When an excessive load is put on the supply, the supply goes into current limiting. This could also b e call power limiting in that the voltages drop as the current increases. When the +20V supply drops to about 16V the transistor Q19710 is turned off. Since Q19709 is turned off after the initial delay, the curr ent through U19702 is cut off. This causes the supply to turn off until the instrument is turned off and back on again.

Convergence Amplifiers

The convergence amplifier section of the convergence board consists of six optimized power amplifiers. Each of the six convergence amplifiers drives one of the convergence yokes whose current is controlled by its respective drive signal from the digital convergence generator. The gain of the amplifiers, defined as the ratio of output current to input voltage, is set by a current sense resistor and the sensed voltage divider, which determines the fraction of the sensed voltage to be applied as feedback signal.

Regulation of this supply can be accomplished controlling the point at which Q19703 turns on. This is done by a voltage source on the emitter or Q19703. By changing the control voltage, the duty cycle of the converter can be changed. The voltage on capacitor C19704 is changed to regulate the system. The regulation of this system is

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DTV307

DM1 SERVICE MENU OVERVIEW

DM1 Service Menu

The service menu is activated by simultaneously pressing DOWN + MENU/OK on the FPA of the DTV307.

This menu contains all the commands used by service personnel to diagnose a problem with the unit, and a Test Pattern option to support ATSC troubleshooting.

DM1 Service Menu

Service menu elements

Service Test - Tests the system and places text results in

the display area on the right-hand side of the screen. See more details below.

Information - Displays IRD Number, ROM version ,

Verifier/CAM and CAMID information on the right-hand side of the screen.

Odometer - Odometer displays: Activation Date is

written in memory when the DIRECTV time is acquired for the first time. In Service Counter indicates the number of hours that the system ha s been under po wer (not just turned on). This is updated every hour. This is not reset to 0 when the EEPROM is cleared with the EEPROM resetting function.

Test Patterns - Transfers to the "Test Patterns…" menu.

These test patterns are specific to ATSC.

Channel Hold -Sets the channel the system will tune to

under certain conditions. See details below.

Power Lockout - Prevents the system from being turned

off. In the event primary power to the system is interrupted, the system would be placed back into the same state as before primary power was interrupted button list is:

• Power Locked

• Power Unlocked -- default

If the user tries to turn off the receiver, then the following message is displayed in the context-sensitive help area: “Power Lockout feature enabled. Unable to turn off system.”

The radio

Phone Prefix Allows service personnel to enter a 1-digit

number to access an outside line and a Call Waiting disable code.

Modem Number -Allows service personnel to enter an 11-

digit phone number to be used during the System Test.

Error Report See description below. (Sat Channel Map) - Depending on which option is chosen

in the choice field, this displays all channel numbers associated with entered transponder number or displays the transponder number associated with a channel. The path button is hidden -- see below for how to summon the button.

Help Transfers to context-sensitive help screen. Exit Exits the Service menu and returns to video.

Service Test

The tests performed by Service Test are as follows:

AV&TL:

The AVDEC and TL (TunerLink) boards have EEPROM locations that hold unique identifiers. The identifiers are unique for each board. The new line title: AV&TL, stands for "Audio/Video and Tuner/Link". The first number is the AVDEC identifier and the second one is the TL board identifier. The AVdec board number is derived from many different pieces of information, including the serial number, mi xed togethe r using a complex algorithm.

ROM

The first 4 characters are the “software model number”. The next characters are the software revision:

§ first letter(s) are prefix

§ next 2 digits are minor versio n number

§ last 2 digits are major version number.

§ If there is a valid patch, then its ID is d isplayed

as 4 characters. An “M” character is displayed if Macrovision is enabled. A “C” character is displayed if colorburst is enabled.

Example: 0400 AT02.40 M C: “The software model number is 400; the software version is AT02.40; there is no valid patch downloaded; Macrovision and Colorburst are enabled.”

VERIFIER/CAM

The information on this line comes from the verifier software. The first number is the verifier software version. T he next number is the CAM version.

CAM ID

The information on this line comes from the verifier software. It should display the same number as is written on the CAM itself.

DEMOD SIGNAL

DEMOD SIGNAL test: if the system is tuned to a B SS or HD-SAT signal, the signal strength between 0 and 100 is given. If not, the data is irrelevant. Note: You can get the ATSC signal strength in other screens.

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DTV307

DM1 SERVICE MENU OVERVIEW

CHECKSUM

The following three 16-bit checksums are displayed:

I: internal ARM ROM checksum H: checksum on the 2 highest megabytes of flash L: checksum on the 2 lowest megabytes of flash

EEPROM

The AVDEC and Tuner EPROM’s are checked. In the tuner EEPROM, all bits are written to twice and read back. In the AVDEC EEPROM 2 bytes in different locations of the EEPROM are tested. The screen will show for each EEPROM “OK” or “KO”.

SYSTEM RAM

The transport, external and cache ram, is fully tested.

VIDEO DRAM

The whole video DRAM is tested. Video decoding will resume normally once the test is complete.

MODEM

This test will call the phone number entered in the modem number menu. If no number has been entered, a reduced set of tests is performed. From reading the code, the internal modem tries to connect to the remote modem, performs a loop-back test, sends modem diagnostic information to the remote modem, and performs a service test loop-back.

PHONELINE LEVEL

Displays the voltage read on the phone line.

DIAL TONE

It looks to see if a dial tone is detected, the line displays whether the dialing method is DTMF or pulse.

CB HISTORY

Five bytes indicating diagnostics for the last 5 calls attempted.

Test Patterns

The Test Patterns are nine patterns that can be selected and displayed for service diagnosis and evaluation. If a test pattern is selected, it has no time-out (i.e., it is displayed as long as the system is on) but it can be cleared by pressing any key on the remote control. When cleared the user will be returned to the Test Pattern menu.

Test Patterns Menu Items:

1 Phase Adj (R) 2 Phase Adj (G) 3 Phase Adj (B) 4 Phase Adj (W) 5 Color Bars 6 Dots (R) 7 Dots (G) 8 Dots (B) 9 Raster

Service Menu - Test Patterns

Channel Hold

Channel Hold permits the system to receive supplemental program data. How and when the data is received is determined by the menu settings. Channel Hold only affects the Main picture. The Channel Hold input can be set to any one of the following: DIRECTV, Antenna A, Antenna B, VID1, VID2, VID3, FRNT, CMPNT by highlighting the toggle field and repeatedly pressing OK until the desired option is displayed. If “Antenna A”, “Antenna B”, or “DIRECTV” is selected, then the user can enter a channel number in the channel entry field. The channel entry field has 2 three-digit channel entry fields for “Antenna A” or “Antenna B” that allow a main channel and/or sub-channel to be entered. If a video input is selected no channel number entry field appears. If “DIRECTV” is selected, then one four-digit channel entry field is displayed that allows a channel to be entered.

Channel Hold has 3 timer settings “At Power On”, “Always”, and “After 5 Min.”. The setting is selected by highlighting the toggle field and pressing OK until the desired option is displayed. When “At Power Off” is selected, the system tunes to the selected channel when the system is turned off. This permits the system to receive supplemental data when the user is not viewing a program. If “Always” is selected, the system is locked to the specified channel and the channel cannot be changed. Program Guide timeouts are also disabled to facilitate creation of a guide channel using a dedicated receiver. When “After 5 Min.” is selected, the system will automatically return to the selected channel after 5 minutes has elapsed between remote control keypresses (this setting is for showroom floor use).

Once selections have been made pressing the “Done” button enables the feature immediately and stores the settings in EEPROM. If the “Clear” action button is selected, it restores normal channel selection by disabling the Channel Hold setting and clearing the channel entry area(s) with dashes.

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DTV307

DM1 SERVICE MENU OVERVIEW

If Channel Hold is set to “Always”, it is possible to turn the system on with the remote control only with the device button that corresponds to the system (TV or DIRECTV) chosen for the Channel Hold. For example, if the Channel Hold has been set to “Tune to DIRECTV Channel 601 Always”, pressing TV on the remote will not turn the HDTV on. There is no device restriction if “After 5 Min.” or “At Power Off” settings are selected.

If Channel Hold is set up for "Antenna A", then switching to "Antenna B" shall be prohibited and vice-versa. When the Channel Hold feature is enabled access to the user of some screens is disabled (Antenna Info, Channel Search, Signal Source, pressing Antenna key on the remote).

Power Lockout

Prevents the unit from being turned off. In the event primary power to the receiver is interrupted, the receiver would be placed back into the same state as before primary power was interrupted, i.e., the receiver would tune to a channel or display the guide. The default is power unlocked.

Phone Prefix

Allows service personnel to enter a 1-digit number to access an outside line and a Call Waiting disable code. “Call Waiting Disable” allows service personnel to enter four digits to disable call waiting. The user can either enter the digits di rectly usi ng the 0 -9 keys on t he re mote contr ol, or they can cycle through the numbers a nd the # and * keys using the up and down navigation arrows.

Modem Number

Allows service personnel to enter an 11-digit phone number to be used dur i ng the System Test.

Error Report

When an error occurs in the DM, some information about this error is stored in EEPROM. The list of erro rs that have

information logged (archived) is limited to 3. The information stored is date/time of occurrence, error code, module ID, function ID and spot ID. The date/time and error code are displayed on the screen. The error code has the module ID embedded in it so the last 3 fields do not need to be displayed on screen. When an error occurs in the TV, information about this error is sent to the DM micro through the ICP link and t he same kind of information is stored in EEPROM.

Three errors are stored for the TV and 3 for the DM. The first, second and last errors are stored. When the system is shipped from the factory, the EEPROM error fields have been cleared through the "reset shipping defaults" command. The screen has a "Clear All" button on it that allows these fields to be cleared.

Transponder Channel Mapping

The Sat Channel Map function is hidden within the Service Menu. In order to access it, the "Error Report" button needs to be highlighted, and then press "8" on the remote control. The “Sat Channel Map” button will appear highlighted and the Sat Channel Map display area will appear on the right. The “Sat Channel Map” button will insert itself between Modem Number and Error Report.

With the Transponder Channel Mapping function, the user can enter a transponder number and the corresponding channels will be displayed, or the user can enter a channel number and the corresponding transponder will be displayed. The "Channel/Transponder" field is also a

choice field so pressing and “Transponder”. should display the current channel number if this

information is available three input boxes are visible.

OK toggles between “Channel”

“Channel” is the default choice, and

. When entering a channel number,

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DTV307

DEFLECTION/POWER SUPPLY TEST POINT LOCATIONS

Field Service Test Points (Top Side)

TP Name Description Location Zone Circuit Area Notes

TP14201 TP14202 TP14101 TP14102 TP14103 TP14104 TP14105 TP14106 TP14107 TP14108 TP14109 TP14110

TP14601

TP14111 H-YOKE

V-YOKE TP14801

TP14802

TP14803

TP14701

TP14804

Choke Board

Raw B+ Unregulated DC JW14203 HH28 AC IN Hot Ground Low side hot ckt U14100 heatsink BB28 +24v Regulated DC CR14110-cathode EE19 Sec Supply +76v Main Reg. DC JW14802 FF16 Sec Supply

-15v Regulated DC CR14129-anode FF19 Sec Supply +15v Regulated DC JW14101 JJ20 Sec Supply +12v Post Reg. DC JW14605 RR27 Sec Supply +35v Audio Power across JW14107 & JW14121 GG19 Sec Supply +5vs Regulated DC RT14602 PP29 Standby Supply +33v Regulated DC R14628 jct P14601-2 TT23 Standby Supply

-12v Regulated DC CR14603-anode & jct P14601-1 TT23 Standby Supply Main ZVS Switch Retrace like 700Vpp

variable Frequency Pulse

Standby ZVS Switch Retrace like

~300Vpp variable Frequency Pulse

On/Off High=ON JW14102 HH23 Main ZVS Horiz Scan Pulse Retrace voltage

1300Vpp @ operating Freq

Vert Scan Pulse Vert retrace Green Wire on Yoke N/A Vertical Scan B+ Pin modulated "DC"

varies with width and Freq Mode

S-cap Switch 1H no ac waveform

mode0 [1H]

S-cap Switch 2H no ac waveform

mode3 [2H] & mode0 [1H]

Dynamic Focus Horiz parabola

modulated by Vertical parabola

Scan ZVS switch Retrace like 500Vpp

variable Frequency Pulse

HVR B+ Varying DC with

Mode and Beam

HVR Retrace Retrace 800Vpp

variable Frequency Pulse

JW14118 BB27 Main ZVS

Q14601-drain [Ta b ] JJ26 S ta nd by Supply

Red Wire on Yoke N/A Scan Gen

BC14802 [R14803] EE14 Scan PS ~68v Mode 0

R14464 jct with Q14455-drain PP15 Scan Gen

R14463jct with Q14454-drain RR15 Scan Gen

R14735 end towards Focus UU5 Dyn Focus

Q14800-drain CC13 Scan PS only on in

Choke Board L24601-7 N/A HVR PS ~100v in 1H/2H

Choke Board L24601-3 N/A HVR Gen

monitor modes

~140v in 2.4H

TP14704 TP14705

TP14706 TP14707 TP14708 TP14709

TP14709 Beam Limiter [ABL] voltage varies with

TP14301 H DR horiz square wave JW14301 RR16 Scan Gen

HVR PS Gate Drive 12v PWM Jct R14762 & R14764 CC6 HVR PS HV Generator Gate

Drive HVR PS Switch 100vpp PWM FB14701 & Q14751-drain EE7 HVR PS

2H PLL output 10v square wave CR14702-cathode NN6 HV Gen +205v supply CRT DC supply CR14707-cathode HH4 HVR PS Beam Limiter [ABL] voltage varies with

12v Square Wave Q14700-gate LL7 HV Gen

C14700 jct R14700 RR5 HV Gen

beam

C 14700 jct R 14700 RR5 HV Gen

beam

PAGE 5A-1

Page 45

DTV307

DEFLECTION/POWER SUPPLY TEST POINT LOCATIONS

TP Name Description Location Zone Circuit Area Notes

TP14805 ZVS Ref 5v reference CR14802-cathode BB1 3 Scan PS TP14806 Sum Point - 9v R14810 & C14807 jct BB9 Scan ZVS TP14807 76vr secondary supply R 14837 & Q14809-emitter

jct TP14808 SP out Series Pass Out CR14809-Anode DD15 Series pass TP14809 Scan Pul horiz sec pulse JW14408 II11 Series pass TP14501 Vert Ref Vout B 1 vpp ramp high side of R14506 0018 Vertical

TP14502 Vert Current Sense 2vpp ramp f R14508 NN19 Vertical TP14503 Vertical Supply Plus CR14501-cathode PP20 Vertical

TP14504 Vertical Supply

Minus

TP14505 -COMP BLANK JW14411 UU20 blanking TP14506 DYN_FOC_BLANK CR14705-cathode Dyn Focus

TP14350 +8VR regulator output U 14355-3 Ps TP14351 12C - DAT R2 R2 Bus U 14354-5 Bus TP14352 12C CLK R2 R2 Bus U 14354-6 Bus TP14353 VERT SYNC V sync active HI U 14350-12 Sync TP14354 Lin e Lo cked Clock Line Locked Clk U 14350-14 PLL TP14355 2H SELECT Hi in 2H+ mode U 14350-5 Mode Selection TP14356 H-PULSEA Scan retr ace pul CR241 00-anode Phasing TP14357 HORIZ SYNC H sync active HI R 14536 at U14351-14 jct Sync TP14358 +9.6V ~9.6Vdc R 24814 at U24801 jct PS

JW14504 NN20 Vertical

DD11 Scan ZVS

TP14359 1H SW active HI in 1 H U24800-12 Mode Selection TP14360 Phase Det B+ 5.1 v CR14550-cathode Ps TP14361 FIRST LOOP-OUT Pulse U 14351-3 P LL TP14362 Phase Det Out Pulse 2.5 V avg U 14351-13 PLL TP14363 VCO IN 1.26 V typical R 14565 at R14555 jct PLL TP14364 OP AMP +SUPPLY +12v R 14854 at Ul 4352-8 jct PS TP14365 WIDTH REF DAC align U 14352-1 TP14366 OP AMP-SUPPLY -1 3v U 143,52-4 Ps TP14367 +5.1 V EEPROM B+ CR14350-cathode PS

TP14368 H OUT square wave R 14309 at R 14302 jct H drive

TP14369 +12v +12vr CR14301-anode Ps TP14370 Q14300 OUT square wave

TP14371 1H VCC active HI in 1H P14406-9 Mode Selection TP14372 -SCAN LOSS I NT Active Low P144065,18 uC Interface I

R 14308 at Q14303/Q14300

Jct

H drive

PAGE 5A-2

Page 46

DTV307

Service Co

ecto

Chipper Check Service Connector Location Guide

Chipper Check

Page 47

Circuit Area Location Guide

DTV307 Chassis Configurations

Page 7-1

Page 48

DTV307 Chassis Configurations

Power Supply / Deflection Assembly Configuration

Page 7-2

Page 49

I/O Assembly Configuration

Page 7-3

Page 50

DTV307 SECTION 7: COMPONENT LOCATION GUIDES

I/O Circuit Board (Top Side)

R38364........HH19

R38367........EE14

R38368........EE14

R38369........GG15

R38370........JJ19

R38372........HH18

R41127........CC02

R41128........AA02

R41129........BB03

R41130........AA04

R41131........AA03

R41132........AA03

R41133........AA20

R41134........CC02

R41274........CC13

R41275........CC13

R41276........CC11

R41277........CC12

R41279....... CC13

R41280....... BB12

R41281....... BB12

R41283....... BB13

R41284....... BB12

R41285....... AA11

R41286....... BB13

R41287....... BB12

R41288....... CC12

SW11900.... LL07

T41200 ....... BB04

TP11301..... MM22

TP11302..... LL20

TP11501..... HH10

TP11502..... GG09

TP11701..... GG10

TP11702..... GG10

TP11801..... GG11

TP11901 ..... AA10

TP11902 ..... CC07

TP11903 ..... EE09

TP11904 ..... FF10

TP11905 ..... FF07

TP11906 ..... FF07

TP18101 ..... DD32

TP18102 ..... DD31

TP18103 ..... DD29

TP18104 ..... DD28

TP18105 ..... EE32

TP18106 ..... CC31

TP18107 ..... CC31

TP22301 ..... BB32

TP22302 ..... CC16

TP22303 ..... EE16

TP22304 ..... DD18

TP22305 ..... EE15

TP22306......EE15

TP22307......CC16

TP22308......CC16

TP22309......CC16

TP22401......FF16

TP22402......FF16

TP22403......FF16

TP38301......GG18

TP38302......MM20

TP38303......MM21

TP41101......BB03

U11301 .......LL23

U11400 .......LL23

U11401 .......MM23

U11402 .......MM27

U11403 .......JJ12

U11404 .......HH12

U11500 .......FF09

U11700........GG07

U11701........HH07

U11702........GG10

U11800........II10

U11900........EE12

U11901........CC09

U11902........CC08

U13101........CC23

U13102........BB22

U13103........BB24

U13201........II03

U13202........EE21

U13203........BB25

U13204........GG05

U13205........EE03

U13206........GG24

U16500........HH27

U16501........GG30

U16502........HH32

U18100........CC30

U18101........BB26

U22300........DD16

U22303........DD26

U22401........FF16

U22402........FF18

U22403........GG18

U22404........FF15

U22405........FF15

U22406........GG15

U22407........HH23

U38200........II17

U38300........GG12

U38301........HH14

U38302........GG16

U38303........HH15

U38304........II14

U38305....... HH18

U38306....... II18

U41275....... CC13

WR11901.... CC08

WR13101.... DD23

WR18101.... CC30

WR31601.... HH04

Y13101....... BB23

Y13201....... HH04

Y18100....... DD28

Y22300....... EE15

Y22301....... EE16

Y22401....... GG23

Page 7A-1

Page 51

DTV307 SECTION 7: COMPONENT LOCATION GUIDES

Deflection/Power Supply Circuit Board (Bottom Side)

C14102........ G24

C14114........ I23

C14115........ I20

C14116........ H18

C14117........ A21

C14118........ G18

C14122........ E25

C14123........ E29

C14124........ C30

C14125........ A21

C14129........ E30

C14130........ J26

C14132........ K25

C14134........ H19

C14137........ H21

C14451........ S15

C14459........ I13

C14464........ P15

C14465........ I14

C14466........ I15

C14467........ I14

C14504........ O20

C14507........ O20

C14509........ O19

C14607........ O24

C14608........ O22

C14615........ P28

C14617........ T25

C14705........ N01

C14709........ J11

C14710........ N08

C14722........ V11

C14724........ V12

C14725........ V12

C14738........ U11

C14740........ V11

C14741....... V18

C14743....... U15

C14745....... V19

C14746....... V16

C14748....... H08

C14750....... F02

C14753....... B06

C14754....... C05

C14755....... C06

C14758....... B06

C14761....... C07

C14763....... B07

C14775....... D05

C14812....... A16

C14814....... B12

C14816....... C11

C14902....... N08

C14904....... O08

CR14302 .... I14

CR14440 .... D20

CR14451 .... S14

CR14508 .... T20

CR14616 .... S25

CR14702 .... N06

CR14705 .... U11

CR14706 .... V19

CR14711 .... V12

CR14712 .... T13

CR14743 .... U14

CR14746 .... T09

CR14749 .... V16

CR14802 .... B11

CR14808 .... A15

CR14810 .... B10

CR14811 .... C10

CR14812 .... C11

JC14101...... U27

JC14102...... U27

JC14103...... U27

JC14104...... U27

JC14105...... U27

JC14106...... U27

JC14107...... E28

JC14403...... O15

JC14601...... S22

JC14701...... L19

JC14702...... L19

JC14703...... V13

JC14704...... U11

JC14705...... M08

JC14706...... U11

JC14707...... V13

JC14708...... U11

JC14710...... V18

JC14801...... B15

JC14802...... B11

Q14105....... I23

Q14501....... S19

Q14502....... S20

Q14503....... T20

Q14606....... R24

Q14702....... K09

Q14706....... J10

Q14707....... V12

Q14708....... U10

Q14710....... U10

Q14732....... V13

Q14733....... U17

Q14734....... U14

Q14735....... V14

Q14736....... U13

Q14738....... U11

Q14739 ....... U11

Q14740 ....... V13

Q14741 ....... V15

Q14805 ....... C10

Q14811 ....... C09

Q14813 ....... M19

Q14901 ....... O06

Q14902 ....... N09

Q14903 ....... O08

Q14904 ....... O09

Q14905 ....... L10

R14102........ A23

R14107........ A21

R14108........ A20

R14112........ A21

R14121........ I23

R14131........ J22

R14132........ J22

R14133........ J23

R14135........ J23

R14250........ O28

R14251........ N28

R14370........ S18

R14376........ S18

R14441........ D20

R14442........ D19

R14450........ Q15

R14453........ T15

R14457........ I12

R14461........ I13

R14466........ P15

R14469........ S15

R14470........ O15

R14471........ I15

R14501........ T20

R14502........ S19

R14503........ P18

R14504........ P17

R14509........ Q19

R14514........ O19

R14515........ S20

R14516........ S20

R14518........ S20

R14527........ T20

R14528........ T20

R14610........ K24

R14616........ R23

R14617........ R24

R14620........ S25

R14621........ S25

R14622........ S25

R14623........ S26

R14624........ S26

R14631........ Q25

R14690........ F03

R14691........ S13

R14692........ V10

R14693........ U11

R14694........ U10

R14695........ T14

R14696........ V10

R14705........ N06

R14717........ I11

R14718........ K09

R14719........ I11

R14720........ K09

R14722........ N10

R14723........ O05

R14724........ N06

R14726........ O07

R14730........ V13

R14732........ V11

R14733........ V15

R14734........ U14

R14738........ L20

R14740........ U13

R14741........ M20

R14742........ K20

R14743........ K20

R14744........ M21

R14745........ N06

R14746........ K20

R14749........ U16

R14750........ U18

R14753........ U07

R14754........ C07

R14759........ B07

R14760........ B06

R14761........ C08

R14763........ C05

R14769........ J10

R14770........ J11

R14773........ K10

R14781........ V11

R14782........ U12

R14783........ V12

R14784........ U14

R14786........ U13

R14789........ U15

R14790........ V16

R14791........ U16

R14792........ U15

R14794........ U10

R14796........ U16

R14798........ U10

R14799........ U10

R14811........ A09

R14812........ A10

R14813 ....... B10

R14814 ....... A09

R14816 ....... B10

R14817 ....... A10

R14819 ....... D10

R14820 ....... C09

R14822 ....... B10

R14823 ....... B11

R14825 ....... B10

R14827 ....... C10

R14828 ....... A16

R14832 ....... B14

R14833 ....... C10

R14836 ....... L19

R14840 ....... B14

R14842 ....... C10

R14843 ....... A16

R14844 ....... M18

R14906 ....... O08

R14907 ....... O08

R14908 ....... O08

R14909 ....... N11

R14912 ....... O09

R14914 ....... R06

R14915 ....... P06

R14916 ....... L10

R14917 ....... L10

R14918 ....... K10

R14919 ....... L10

Page 7A-2

Page 52

DTV307 SECTION 7: COMPONENT LOCATION GUIDES

Deflection/Power Supply Circuit Board (Top Side)

C14101........CC29

C14103........BB25

C14104........CC25

C14105........FF20

C14106........CC20

C14107........II22

C14108........GG19

C14109........CC25

C14110........CC21

C14111........EE18

C14112........DD29

C14113........CC29

C14120........EE29

C14121........EE28

C14126........DD21

C14127........RR25

C14128........GG20

C14131........HH20

C14133........CC30

C14135........FF19

C14136........FF21

C14140........MM27

C14141........RR29

C14200........OO31

C14202........RR30

C14203........JJ30

C14204........HH25

C14205........II27

C14207........FF31

C14208........II29

C14209........UU26

C14250........OO28

C14450........KK16

C14452........QQ10

C14453........MM13

C14454........NN13

C14455........OO13

C14456........LL14

C14457........RR12

C14458........SS14

C14460........QQ14

C14461........MM03

C14462........KK16

C14463........PP12

C14501........QQ21

C14502........RR20

C14503........TT20

C14505........OO18

C14506........NN21

C14601........KK23

C14602........KK24

C14603........KK25

C14604........LL24

C14605........KK26

C14606........NN23

C14609........QQ23

C14610........OO23

C14611........QQ27

C14612........PP26

C14613........PP25

C14614........KK27

C14616........LL23

C14700........RR05

C14701........KK03

C14702........MM05

C14703........II05

C14704........JJ08

C14706........JJ05

C14707........BB04

C14708........II02

C14711........MM10

C14712........LL08

C14713........LL10

C14714....... NN09

C14715....... NN07

C14716....... MM08

C14717....... OO07

C14718....... KK09

C14719....... CC08

C14721....... TT08

C14723....... SS06

C14726....... UU14

C14727....... KK12

C14728....... MM06

C14729....... MM03

C14730....... SS07

C14731....... UU13

C14732....... TT13

C14734....... MM20

C14735....... TT13

C14736....... UU16

C14737....... LL21

C14739....... TT13

C14742....... VV16

C14751....... JJ06

C14752....... CC04

C14756....... BB07

C14757....... HH09

C14759....... AA07

C14760....... CC06

C14762....... CC05

C14764....... EE06

C14765....... EE06

C14777....... DD05

C14800....... DD09

C14801....... HH12

C14802....... DD12

C14803....... BB12

C14804....... CC11

C14805....... DD15

C14806....... CC15

C14807....... CC10

C14808....... BB14

C14809....... HH10

C14810....... JJ18

C14811....... GG16

C14813....... EE15

C14815....... DD12

C14901....... PP07

C14903....... RR07

C14905....... OO07

CR14102 .... KK24

CR14103 .... BB22

CR14104 .... EE29

CR14105 .... AA27

CR14107 .... DD30

CR14108 .... CC30

CR14110 .... EE20

CR14112 .... HH22

CR14113 .... II19

CR14115 .... CC25

CR14117 .... EE25

CR14120 .... EE25

CR14121 .... EE29

CR14122 .... DD25

CR14128 .... CC28

CR14129 .... GG20

CR14131 .... II20

CR14201 .... JJ29

CR14250 .... NN28

CR14452 .... LL12

CR14453 .... OO12

CR14455 .... TT17

CR14460 .... QQ12

CR14501 .... PP20

CR14502 .... SS19

CR14505..... QQ22

CR14507..... RR19

CR14509..... PP21

CR14510..... PP21

CR14512..... NN20

CR14513..... MM21

CR14601..... TT25

CR14602..... OO22

CR14603..... QQ24

CR14604..... LL23

CR14605..... KK23

CR14606..... KK25

CR14607..... OO24

CR14608..... OO27

CR14609..... OO26

CR14610..... PP25

CR14611..... OO25

CR14612..... QQ24

CR14613..... HH26

CR14614..... II26

CR14615..... II26

CR14620..... RR23

CR14621..... SS23

CR14701..... II05

CR14703..... NN01

CR14704..... JJ02

CR14707..... KK04

CR14708..... KK05

CR14709..... SS08

CR14710..... SS07

CR14713..... MM12

CR14747..... VV07

CR14748..... TT13

CR14750..... TT08

CR14751..... HH08

CR14752..... CC07

CR14753..... CC05

CR14755..... CC08

CR14757..... BB06

CR14758..... BB05

CR14803..... BB13

CR14804..... HH10

CR14805..... CC10

CR14807..... CC09

CR14809..... DD15

CR14813..... EE15

CR14900..... OO06

CR14901..... PP05

CR14902..... OO10

CR14903..... RR06

F14200........ TT31

FB14101..... CC27

FB14102..... BB22

FB14103..... BB22

FB14104..... HH21

FB14105..... HH22

FB14107..... CC28

FB14108..... II19

FB14109..... II19

FB14110..... EE25

FB14111..... DD25

FB14451..... KK14

FB14701..... FF06

FB14702..... SS07

FB14703..... TT07

FB14704..... MM12

FB14705..... MM13

FB14707..... II04

FB14708..... II05

FB14709..... NN01

FB14710..... MM01

FB14711..... GG08

FB14712..... HH08

FB14713 .....DD07

FB14714 .....DD06

FB14715 .....MM07

FB14716 .....MM04

FB14801 .....HH10

FB14802 .....GG10

J14101.........HH17

J14102.........RR17

J14103.........KK30

J14104.........GG30

J14201.........UU29

J14402.........VV20

J14403.........II15

J14405.........II04

J14601.........TT23

J14901.........VV07

JW14101.....II21

JW14102.....II23

JW14103.....GG25

JW14104.....JJ31

JW14105.....SS22

JW14106.....SS22

JW14107.....HH18

JW14108.....II17

JW14109.....UU18

JW14110.....NN17

JW14111.....HH16

JW14112.....HH16

JW14113.....HH16

JW14114.....II13

JW14115.....QQ28

JW14116.....GG20

JW14119.....DD26

JW14120.....II17

JW14121.....JJ21

JW14122.....HH23

JW14123.....GG18

JW14124.....EE27

JW14125.....VV14

JW14126.....DD30

JW14127.....KK31

JW14128.....CC19

JW14201.....NN27

JW14202.....HH29

JW14203.....HH28

JW14204.....UU24

JW14205.....UU25

JW14206.....UU25

JW14301.....RR16

JW14302.....RR16

JW14303.....MM16

JW14401.....MM18

JW14402.....PP14

JW14403.....RR15

JW14404.....QQ08

JW14405.....QQ08

JW14406.....RR10

JW14407.....RR11

JW14408.....II11

JW14409.....CC19

JW14410.....EE20

JW14412.....DD16

JW14413.....KK17

JW14414.....LL17

JW14451.....KK14

JW14452.....JJ15

JW14453.....JJ16

JW14454.....MM18

JW14455.....II13

JW14501.....PP19

JW14502.....PP18

JW14503.....MM21

JW14504.....NN20

JW14505.....PP21

JW14506.....PP22

JW14507.....LL21

JW14508.....UU19

JW14601.....RR27

JW14602.....KK26

JW14603.....PP24

JW14604.....PP23

JW14605.....RR26

JW14606.....SS22

JW14607.....TT25

JW14608.....JJ25

JW14609.....SS24

JW14610.....SS24

JW14612.....OO24

JW14701.....KK07

JW14702.....TT17

JW14703.....MM18

JW14704.....VV09

JW14705.....VV11

JW14706.....LL19

JW14707.....LL08

JW14708.....FF10

JW14709.....II10

JW14710.....SS06

JW14711.....UU20

JW14713.....JJ03

JW14714.....BB05

JW14715.....JJ13

JW14716.....MM20

JW14717.....II11

JW14718.....FF10

JW14721.....JJ10

JW14722.....KK06

JW14758.....UU15

JW14759.....FF06

JW14760.....GG07

JW14761.....HH07

JW14763.....FF13

JW14764.....FF13

JW14767.....FF09

JW14768.....FF09

JW14801.....RR16

JW14802.....FF16

JW14803.....FF16

JW14804.....FF11

JW14805.....BB12

JW14806.....DD10

JW14807.....MM19

JW14808.....CC16

JW14901.....QQ06

JW14902.....JJ13

K14250........MM29

K14401........SS12

K14402........DD18

L14103........HH28

L14200........PP31

L14201........MM30

L14203........SS30

L14301........MM16

L14451........RR10

L14454........HH14

L14455........RR08

L14456........PP09

L14500........QQ20

L14501........OO20

L14601........OO22

L14602........PP27

L14760........FF09

L14775........DD02

L14801........GG15

N/A1............VV01

N/A2............VV32

N/A5............AA01

N/A7............VV05

N/A8............AA06

Q14100........AA29

Q14101........CC28

Q14103........DD28

Q14106........HH25

Q14250........OO29

Q14440........DD20

Q14451........LL16

Q14452........TT16

Q14454........RR14

Q14455........PP15

Q14456........PP15

Q14457........SS15

Q14504........UU18

Q14601........KK26

Q14602........II26

Q14603........JJ25

Q14604........PP29

Q14605........RR24

Q14607........SS26

Q14608........SS25

Q14700........LL07

Q14701........LL04

Q14703........NN06

Q14704........MM07

Q14730........TT07

Q14731........TT10

Q14737........KK19

Q14750........GG04

Q14751........DD07

Q14800........CC13

Q14801........DD11

Q14802........BB13

Q14803........AA09

Q14804........BB09

Q14806........BB15

Q14807........CC16

Q14808........BB14

Q14809........BB17

R14100........CC31

R14101........BB19

R14103........DD26

R14104........HH20

R14105........HH27

R14106........CC31

R14109........BB19

R14111........AA19

R14114........DD26

R14115........GG29

R14116........GG22

R14117........CC30

R14118........EE28

R14119........EE27

R14120........DD28

R14122........EE26

R14136........SS26

R14138........AA24

R14139........II23

R14201........UU27

R14202........VV26

R14253........PP28

R14304........MM15

R14305........MM16

R14440........CC19

R14449........RR15

R14451........OO11

R14452........TT14

R14454........SS16

R14456........RR11

R14458........SS16

R14459........HH14

R14460 ....... QQ12

R14463 ....... RR14

R14464 ....... NN14

R14465 ....... SS16

R14467 ....... TT16

R14468 ....... TT16

R14505 ....... OO19

R14506 ....... OO18

R14507 ....... RR18

R14508 ....... NN19

R14510 ....... PP17

R14511 ....... NN18

R14512 ....... RR18

R14513 ....... RR18

R14517 ....... TT20

R14520 ....... OO20

R14522 ....... PP18

R14523 ....... TT20

R14524 ....... PP20

R14525 ....... TT19

R14526 ....... UU21

R14529 ....... TT19

R14601 ....... LL23

R14602 ....... LL25

R14603 ....... JJ24

R14604 ....... JJ25

R14605 ....... JJ26

R14606 ....... II26

R14607 ....... KK23

R14608 ....... JJ24

R14609 ....... OO25

R14611 ....... II25

R14612 ....... NN23

R14613 ....... NN23

R14614 ....... NN22

R14615 ....... SS23

R14618 ....... KK25

R14619 ....... PP23

R14625 ....... PP28

R14627 ....... QQ25

R14629 ....... SS24

R14630 ....... QQ26

R14632 ....... UU24

R14688 ....... UU19

R14689 ....... UU15

R14697 ....... GG03

R14698 ....... GG03

R14699 ....... GG03

R14700 ....... TT05

R14701 ....... II02

R14702 ....... TT02

R14703 ....... JJ01

R14704 ....... GG07

R14706 ....... MM06

R14707 ....... GG03

R14708 ....... NN08

R14709 ....... MM06

R14710 ....... NN10

R14711 ....... MM09

R14712 ....... NN07

R14713 ....... NN07

R14714 ....... LL09

R14715 ....... LL09

R14716 ....... LL09

R14721 ....... JJ11

R14725 ....... QQ05

R14727 ....... QQ06

R14728 ....... QQ07

R14729 ....... VV09

R14731 ....... TT13

R14735 ....... UU06

R14736 ....... SS09

R14737 ....... JJ19

Page 7A-3

Page 53

DTV307 SECTION 7: COMPONENT LOCATION GUIDES

Deflection/Power Supply Circuit Board (Top Side)

R14739........VV09

R14747........TT12

R14748........BB06

R14751........UU17

R14752........JJ07

R14755........BB04

R14756........CC08

R14757........FF09

R14758........FF02

R14762........CC07

R14764........CC06

R14765........TT14

R14766........KK03

R14767........AA02

R14768........TT03

R14774........LL01

R14776........EE02

R14777........EE02

R14778....... EE05

R14779....... CC03

R14780....... EE02

R14787....... TT15

R14801....... EE10

R14802....... AA08

R14803....... DD10

R14804....... CC12

R14805....... DD10

R14806....... FF14

R14807....... DD12

R14808....... CC13

R14809....... DD13

R14810....... AA08

R14815....... DD14

R14818....... JJ19

R14821....... BB08

R14824....... BB10

R14826 ....... DD13

R14829 ....... BB16

R14830 ....... AA16

R14831 ....... CC15

R14834 ....... DD16

R14835 ....... BB11

R14837 ....... EE16

R14838 ....... BB14

R14839 ....... BB15

R14841 ....... CC17

R14845 ....... TT17

R14846 ....... DD15

R14900 ....... OO06

R14901 ....... OO07

R14902 ....... OO08

R14903 ....... QQ05

R14904 ....... PP06

R14905 ....... PP06

R14910........TT06

R14911........TT06

RT14202..... KK31

RT14250..... LL28

RT14501..... QQ22

RT14502..... LL21

RT14601..... PP24

RT14602..... PP29

T14100........ CC24

T14101........ FF25

T14300........ NN15

T14451........ KK14

T14600........ LL24

T14700........ QQ03

T14751........ HH07

T14800........ GG14

TP14101......EE20

TP14102......FF17

TP14103......GG19

TP14104......JJ21

TP14105......RR27

TP14106......HH19

TP14107......PP29

TP14108......TT24

TP14109......QQ24

TP14110......BB29

TP14111......II23

TP14201......HH29

TP14202......DD31

TP14301......RR15

TP14501......OO18

TP14502......OO19

TP14503......PP20

TP14504......MM20

TP14505......VV20

TP14506......TT11

TP14601......KK26

TP14701......UU05

TP14704......CC06

TP14705......LL07

TP14706......DD07

TP14707......NN06

TP14708......II04

TP14709......TT04

TP14710......KK06

TP14801......EE14

TP14802......OO14

TP14803......RR14

TP14804......BB13

TP14805......BB10

TP14806......AA08

TP14807......EE16

TP14808......DD16

TP14809......II10

U14100....... AA24

U14101....... AA21

U14102....... HH24

U14104....... RR26

U14301....... VV17

U14501....... PP19

U14601....... MM23

U14603....... NN23

U14701....... JJ02

U14702....... TT11

U14711....... NN07

U14732....... LL20

U14750....... FF04

U14751....... BB07

U14775....... DD04

Page 7A-4

Page 54

DTV307 SECTION 7: COMPONENT LOCATION GUIDES

I/O Circuit Board (Bottom Side)

C11310........ L23

C11413........ M16

C11416........ M14

C11417........ K30

C11418........ K29

C11419........ K31

C11420........ J30

C11421........ J29

C11422........ J29

C11423........ L27

C11425........ H12

C11437........ J12

C11438........ I26

C11440........ K26

C11449........ L23

C11504........ F09

C11707........ H07

C11708........ F08

C11709........ G07

C11710........ G07

C11712........ G10

C11810........ I09

C11813........ I09

C11815........ I09

C11841........ I11

C11909........ D12

C11911........ C09

C11915........ E07

C11916........ E10

C11918........ D07

C11919........ E10

C11921........ F06

C11923........ D08

C11924........ C08

C11926........ E10

C11927........ B09

C11935........ C09

C11938........ C07

C11939........ B08

C11942........ I11

C11943........ B07

C11944........ B05

C11945........ I10

C11946........ I10

C11948........ C05

C11953........ B07

C13102........ C24

C13104........ C22

C13106........ C23

C13107........ C23

C13109........ B24

C13113........ C21

C13114........ C23

C13115........ C25

C13116........ D21

C13117........ B21

C13119........ B22

C13132........ C20

C13138........ E25

C13163........ C21

C13166........ B23

C13167........ D22

C13168........ B24

C13169........ B25

C13170........ C24

C13171........ C23

C13172........ B24

C13214........ D21

C13215........ D21

C13219........ E25

C13227........ B25

C13229........ G25

C13240........ E03

C13242....... M13

C13301....... C22

C13302....... C21

C13312....... C21

C16506....... H26

C16507....... G30

C18107....... D30

C18108....... D30

C18110....... E31

C18112....... E30

C18113....... E30

C18114....... D29

C18116....... D29

C18117....... D28

C18118....... E29

C18119....... D29

C18120....... D30

C18121....... D30

C18122....... D29

C18123....... B28

C18125....... C28

C18126....... B27

C18127....... D29

C18128....... D28

C18129....... D31

C18130....... E30

C18132....... D30

C18134....... C30

C18135....... C31

C18146....... B30

C18147....... C29

C18149....... C29

C18152....... C29

C18153....... C29

C18154....... C28

C18157....... B28

C18158....... C29

C18159....... C30

C18160....... C28

C18161....... C28

C18162....... D28

C18163....... C28

C18164....... C28

C18165....... B26

C18167....... C30

C18169....... B29

C18173....... B31

C22312....... D17

C22313....... D16

C22314....... D15

C22315....... D16

C22318....... B17

C22320....... C15

C22321....... D18

C22322....... D15

C22325....... D17

C22326....... D17

C22329....... D17

C22330....... D17

C22331....... D18

C22336....... D26

C22337....... E27

C22340....... C18

C22349....... B16

C22350....... B15

C22355....... E19

C22401....... F16

C22409....... H19

C22410....... G18

C22412....... G15

C22414....... F14

C22415....... F15

C22416....... G15

C22418 ....... H23

C22420 ....... H23

C22425 ....... G22

C22434 ....... F16

C38201 ....... I17

C38301 ....... G13

C38302 ....... G12

C38303 ....... G14

C38304 ....... H15

C38308 ....... H18

C38312 ....... I14

C38313 ....... I14

C38314 ....... G16

C41275 ....... C13

C41278 ....... C13

CR11902..... F09

CR11903..... G09

CR11904..... D09

CR11905..... D09

CR11908..... F07

CR11910..... D08

CR11911..... D07

CR13102..... E21

CR13103..... E21

CR13201..... D21

CR16502..... H31

CR16503..... H30

CR16508..... H31

CR16516..... J24

CR16517..... J24

CR22301..... C17

CR22401..... G21

CR22402..... G21

CR22403..... G20

CR22405..... G15

CR22406..... G22

CR22407..... H20

CR38217..... K17

CR38219..... K19

CR38301..... H15

CR41121..... A02

FB13201..... G05

FB13220..... M13

FB18103..... D31

FB18105..... D31

FB18106..... D30

JC22302...... D15

JC38306...... H15

JC38307...... D18

JC38308...... H19

JC38309...... H19

L13204........ D21

Q11905....... F09

Q11907....... F09

Q11908....... H10

Q11909....... G10

Q13109....... B21

Q18103....... C27

Q18104....... D28

Q18107....... B29

Q18108....... B30

Q18111....... B29

Q18112....... B31

Q22318....... C16

Q22319....... C16

Q22320....... C16

Q22414....... H22

Q38314....... I18

R11301 ....... J08

R11304 ....... J09

R11309 ....... J10

R11310 ....... J11

R11311 ....... L22

R11312........ J22

R11317........ B03

R11319........ J07

R11320........ J09

R11322........ J10

R11323........ J11

R11324........ L22

R11325........ J23

R11326........ K22

R11327........ K08

R11328........ K07

R11329........ K11

R11330........ K11

R11331........ J23

R11336........ I08

R11415........ M25

R11417........ M28

R11422........ L25

R11424........ L24

R11425........ L24

R11429........ L23

R11430........ M27

R11431........ M26

R11432........ M27

R11433........ M27

R11434........ M15

R11436........ M14

R11441........ M28

R11450........ K30

R11451........ K31

R11452........ J30

R11453........ J29

R11454........ J30

R11455........ K29

R11456........ K30

R11457........ J29

R11458........ J30

R11459........ I29

R11460........ L17

R11461........ L19

R11462........ L14

R11463........ M15

R11464........ K29

R11465........ K30

R11469........ J13

R11472........ I12

R11474........ I12

R11478........ I13

R11480........ I13

R11491........ I25

R11492........ J26

R11495........ J26

R11496........ K26

R11509........ F08

R11702........ G10

R11703........ G09

R11717........ G10

R11728........ I10

R11733........ J11

R11736........ G07

R11737........ G08

R11739........ H08

R11740........ F11

R11741........ H08

R11812........ F09

R11900........ E09

R11901........ E12

R11902........ F11

R11915........ F10

R11916........ E12

R11917........ E12

R11918........ E12

R11921........ E12

R11922........ E12

R11926........ D07

R11927........ C08

R11932........ C12

R11933........ E13

R11936........ F07

R11937........ E05

R11938........ C03

R11939........ F06

R11944........ F09

R11945........ F10

R11946........ G09

R11947........ H10

R11949........ C09

R11950........ F06

R11951........ F06

R11952........ G10

R13104........ D23

R13105........ B24

R13106........ C24

R13107........ B25

R13110........ D21

R13111........ B23

R13112........ D25

R13113........ B25

R13115........ B25

R13120........ C22

R13121........ B25

R13126........ D24

R13128........ D22

R13131........ B25

R13134........ B22

R13135........ B22

R13136........ B21

R13138........ C23

R13139........ C25

R13141........ C24

R13142........ C24

R13145........ C25

R13160........ D22

R13161........ B24

R13162........ C25

R13163........ B24

R13165........ E25

R13167........ B23

R13168........ D21

R13169........ D23

R13172........ B23

R13173........ B23

R13176........ B22

R13181........ D22

R13182........ E21

R13187........ E25

R13195........ C23

R13196........ B24

R13197........ B24

R13198........ D25

R13200........ D24

R13201........ B25

R13212........ D22

R13220........ B25

R13262........ B25

R13263........ C25

R13265........ B25

R13269........ B25

R13277........ B25

R13281........ B25

R13287........ D22

R13290........ B22

R13291........ B22

R13292........ G05

R13301........ C21

R13302........ C22

R13318........ B21

R13319........ B21

R13329........ D23

R16500........ J31

R16501........ K31

R16502........ H28

R16503........ K26

R16504........ J28

R16505........ H28

R16507........ F27

R16508........ F28

R16509........ G27

R16510........ F30

R16511........ F27

R16512........ F27

R16514........ H26

R16515........ K28

R16516........ K27

R16518........ G26

R16519........ G26

R16520........ G28

R16521........ G27

R16522........ G27

R16524........ I31

R16525........ I28

R16527........ H27

R16533........ G29

R16535........ G30

R16536........ G30

R16537........ G30

R16554........ G31

R16555........ J24

R16556........ H26

R16559........ F31

R16563........ F30

R16565........ J24

R16573........ H28

R16574........ H27

R16575........ H27

R18101........ C32

R18105........ B31

R18108........ D29

R18109........ E28

R18110........ E29

R18111........ D28

R18112........ C30

R18114........ B30

R18115........ B28

R18116........ B27

R18117........ C27

R18119........ D27

R18120........ D28

R18121........ C28

R18122........ C28

R18123........ C28

R18124........ D28

R18127........ B30

R18128........ B31

R18138........ C29

R18139........ B28

R18140........ B29

R18141........ B31

R18142........ B32

R18143........ B30

R18144........ B30

R18145........ B30

R18146........ E28

R18147........ C30

R18148........ F25

R18149........ G25

R18503........ I31

R18504........ J31

R18505........ K31

R18506 ....... I28

R18507 ....... I27

R18508 ....... I26

R18509 ....... J28

R18510 ....... K28

R18511 ....... J27

R22306 ....... E19

R22309 ....... D17

R22313 ....... E18

R22315 ....... D18

R22316 ....... D18

R22323 ....... C15

R22324 ....... C15

R22328 ....... B18

R22329 ....... B18

R22330 ....... D16

R22331 ....... D16

R22332 ....... D16

R22334 ....... D14

R22339 ....... C17

R22341 ....... D20

R22357 ....... E19

R22360 ....... E26

R22367 ....... B16

R22372 ....... B16

R22377 ....... B15

R22405 ....... I22

R22406 ....... I22

R22407 ....... I23

R22408 ....... I23

R22409 ....... I24

R22410 ....... I24

R22411 ....... F16

R22412 ....... F16

R22448 ....... G18

R22449 ....... I22

R22453 ....... H23

R22460 ....... H22

R22461 ....... H22

R22462 ....... H22

R22463 ....... H24

R22464 ....... H24

R22469 ....... H23

R38200 ....... H14

R38210 ....... J15

R38211 ....... J15

R38212 ....... J14

R38213 ....... J17

R38214 ....... J18

R38215 ....... J18

R38245 ....... H14

R38246 ....... H14

R38248 ....... I16

R38255 ....... K17

R38256 ....... K19

R38306 ....... G15

R38307 ....... H15

R38310 ....... I15

R38333 ....... I15

R38335 ....... I15

R38337 ....... G14

R38338 ....... I18

R38340 ....... I16

R38341 ....... I17

R38343 ....... I17

R38365 ....... H15

R38371 ....... I19

R41278 ....... D13

R41282 ....... B12

Page 7A-5

Page 55

DTV307 SECTION 7: COMPONENT LOCATION GUIDES

I/O Circuit Board (Top Side)

C11300........JJ10

C11301........JJ11

C11302........LL21

C11303........KK21

C11304........JJ08

C11305........JJ09

C11306........II08

C11308........II07

C11400........LL21

C11401........LL12

C11402........LL13

C11403........MM17

C11404........LL17

C11405........KK25

C11406........LL26

C11407........LL25

C11408........LL26

C11409........MM25

C11410........KK24

C11414........LL19

C11415........LL19

C11424........LL22

C11426........II12

C11427........II12

C11428........MM26

C11429........II13

C11430........II12

C11431........HH12

C11432........HH12

C11433........HH11

C11434........HH12

C11435........HH13

C11436........II12

C11439........KK22

C11441........MM24

C11442........JJ13

C11443........II11

C11444........II12

C11445........MM26

C11446........MM26

C11447........LL26

C11448........LL26

C11501........FF10

C11502........FF08

C11503........FF08

C11518........HH09

C11519........HH10

C11700........HH09

C11701........HH08

C11702........II08

C11703........GG08

C11704........FF11

C11705........FF08

C11706........II07

C11711........GG09

C11805........II11

C11806........II11

C11807........GG11

C11808........JJ09

C11809........JJ09

C11811........II08

C11812........JJ10

C11814........JJ10

C11816........JJ10

C11817........JJ10

C11900........DD12

C11901........BB09

C11902........BB08

C11903........FF10

C11904........FF09

C11905........DD13

C11906........CC10

C11907........DD08

C11908....... BB10

C11910....... DD09

C11912....... DD08

C11913....... CC10

C11914....... BB10

C11917....... DD09

C11920....... DD07

C11922....... DD07

C11925....... CC08

C11928....... EE13

C11929....... EE11

C11930....... CC12

C11931....... FF12

C11932....... FF12

C11933....... CC11

C11934....... BB07

C11936....... DD09

C11937....... DD08

C11940....... EE05

C11941....... CC03

C11947....... BB06

C11950....... FF06

C11951....... FF06

C11952....... BB10

C13101....... EE23

C13103....... AA20

C13105....... EE24

C13108....... AA26

C13110....... BB24

C13111....... BB24

C13112....... BB23

C13118....... AA20

C13120....... EE24

C13121....... EE24

C13123....... DD22

C13124....... EE23

C13125....... BB23

C13126....... EE25

C13128....... EE24

C13130....... EE24

C13131....... EE25

C13133....... EE24

C13134....... DD21

C13144....... EE23

C13147....... EE25

C13201....... II04

C13202....... HH04

C13203....... HH04

C13204....... HH03

C13205....... JJ02

C13206....... JJ02

C13207....... JJ02

C13208....... DD21

C13209....... DD22

C13210....... DD22

C13211....... DD21

C13212....... DD22

C13213....... DD22

C13220....... HH06

C13221....... HH05

C13222....... GG06

C13223....... GG04

C13224....... HH05

C13225....... EE01

C13226....... FF01

C13230....... JJ04

C13231....... JJ03

C13232....... II03

C13233....... II03

C13234....... HH03

C13235....... HH03

C13236....... FF24

C13238....... FF04

C13239 ....... GG03

C13243 ....... FF22

C13307 ....... BB21

C16500 ....... HH30

C16501 ....... HH32

C16502 ....... HH30

C16503 ....... HH31

C16504 ....... HH28

C16505 ....... HH27

C16508 ....... GG31

C16509 ....... HH29

C16510 ....... HH25

C16511 ....... GG26

C16512 ....... GG28

C16513 ....... FF32

C16514 ....... HH32

C16515 ....... HH26

C16516 ....... GG26

C16517 ....... HH27

C16518 ....... HH29

C16519 ....... FF30

C16520 ....... FF31

C16521 ....... FF32

C16522 ....... HH29

C16526 ....... GG32

C16527 ....... HH32

C18100 ....... CC32

C18101 ....... BB32

C18102 ....... BB31

C18103 ....... BB32

C18104 ....... BB31

C18105 ....... CC31

C18106 ....... CC31

C18109 ....... DD31

C18111 ....... DD31

C18115 ....... DD29

C18124 ....... DD27

C18131 ....... EE30

C18133 ....... DD30

C18136 ....... BB31

C18137 ....... BB31

C18138 ....... BB31

C18139 ....... BB31

C18140 ....... CC31

C18141 ....... BB30

C18142 ....... BB30

C18143 ....... BB30

C18144 ....... BB30

C18145 ....... CC30

C18148 ....... CC29

C18150 ....... BB29

C18151 ....... BB30

C18155 ....... BB28

C18156 ....... BB29

C18166 ....... CC30

C18168 ....... AA27

C18170 ....... BB27

C18171 ....... DD27

C18172 ....... EE32

C22300 ....... BB14

C22301 ....... CC14

C22302 ....... FF19

C22303 ....... CC19

C22304 ....... CC19

C22305 ....... CC19

C22306 ....... CC19

C22307 ....... EE14

C22308 ....... EE16

C22309 ....... CC18

C22310 ....... CC19

C22311 ....... BB19

C22316 ....... BB17

C22317 ....... BB17

C22319........CC17

C22323........DD18

C22324........EE18

C22327........EE17

C22328........BB18

C22332........CC15

C22333........CC15

C22334........CC15

C22335........CC14

C22338........CC16

C22339........BB16

C22341........CC15

C22342........BB15

C22343........CC15

C22344........BB15

C22345........CC16

C22346........CC16

C22347........CC15

C22348........EE26

C22351........CC17

C22352........BB18

C22353........BB17

C22354........BB18

C22356........II20

C22402........GG21

C22403........GG21

C22404........HH20

C22405........EE18

C22406........EE17

C22407........EE19

C22408........EE18

C22411........GG19

C22413........GG15

C22417........HH24

C22419........GG23

C22421........GG23

C22422........HH24

C22423........II22

C22424........HH22

C22426........II23

C22427........II24

C22428........FF16

C22429........FF16

C22430........FF16

C22431........FF17

C22432........FF17

C22433........FF17

C38200........JJ17

C38210........JJ19

C38211........JJ18

C38212........JJ17

C38213........JJ15

C38214........JJ15

C38215........JJ16

C38216........HH17

C38300........HH14

C38305........II15

C38306........HH16

C38307........II15

C38309........II19

C38316........II16

C38317........II16

C41125........BB02

C41126........BB02

C41127........AA03

C41128........BB03

C41276........BB12

C41279........AA12

C41280........AA13

CR11301.....II08

CR11302.....II08

CR11303.....JJ08

CR11401.....KK23

CR11501.....FF08

CR11502.....FF08

CR11503.....FF09

CR11700.....FF11

CR11801.....GG08

CR11802.....GG09

CR11906.....HH11

CR11907.....FF06

CR11909.....CC03

CR13101.....DD25

CR16500.....HH29

CR16501.....HH26

CR16504.....HH27

CR16505.....HH28

CR16506.....HH26

CR16507.....HH29

CR16509.....GG32

CR16511.....FF31

CR18103.....DD27

CR22303.....CC17

CR22404.....GG18

CR38200.....JJ17

CR38201.....JJ17

CR38202.....JJ18

CR38203.....JJ18

CR38204.....JJ18

CR38205.....JJ19

CR38206.....JJ15

CR38207.....JJ14

CR38208.....JJ16

CR38209.....JJ15

CR38210.....JJ16

CR38211.....JJ17

CR38212.....KK17

CR38213.....KK19

CR38214.....JJ14

CR38215.....KK16

CR41120.....BB02

E38301........KK22

FB11901......EE07

FB11902......EE06

FB11903......EE08

FB11904......DD07

FB13101......BB21

FB13202......HH05

FB13203......HH05

FB13204......JJ04

FB13205......GG01

FB13206......HH02

FB13207......HH02

FB13208......JJ01

FB13209......GG01

FB13210......II02

FB13211......II02

FB13212......JJ01

FB13213......FF05

FB13214......JJ04

FB13215......JJ04

FB13216......FF05

FB18100......EE30

FB18101......EE29

FB18102......DD31

FB18104......DD31

FB18107......CC28

J11300.........KK11

J11301.........KK08

J11302.........KK23

J11400.........LL18

J11401.........LL15

J11402.........II12

J11403.........JJ26

J11900.........LL01

J11901.........LL10

J13107.........AA21

J13200.........MM13

J13201.........AA25

J13202.........AA30

J13203.........II05

J13204.........II01

J13205.........AA23

J13206.........JJ05

J13207.........EE22

J16500.........FF29

J16501.........LL29

J16502.........II29

J16503.........KK29

J16504.........CC33

J16507.........EE33

J16508.........FF33

J16511.........GG33

J22300.........AA14

J22325.........AA16

J22401.........II23

J22402.........FF12

J22403.........FF21

J38200.........KK15

J38201.........KK18

J38301.........MM21

J41125.........AA02

J41126.........AA03

J41275.........AA12

J41276.........AA04

JC22301.......EE16

JC38201.......JJ19

JC38202.......KK19

JC38301.......HH14

JC38302.......GG14

JC38303.......HH16

JC38304.......GG16

JC38305.......HH16

JC38310.......HH19

L11900 ........EE07

L11901 ........EE08

L11902 ........DD10

L11903 ........EE06

L11904 ........CC07

L11905 ........BB08

L11906 ........CC06

L11907 ........BB06

L11908 ........EE11

L11909 ........DD07

L13105 ........CC21

L13201 ........DD22

L13202 ........DD21

L13203 ........DD21

L13205 ........EE25

L13207 ........EE02

L13208 ........GG04

L18100 ........CC32

L18101 ........BB32

L18102 ........BB32

L18103 ........BB31

L18104 ........BB31

L18105 ........BB30

L18106 ........BB30

L18107 ........BB29

L18108 ........BB28

L18110 ........EE31

L18111 ........EE28

L18112 ........BB28

L22300 ........DD19

L22301 ........CC16

L22302 ........CC16

L22303 ........CC15

L22305 ........BB18

L22306 ........GG23

L22307........ DD14

L38300........ II14

Q11300....... II08

Q11301....... JJ09

Q11302....... JJ09

Q11303....... JJ08

Q11304....... KK21

Q11305....... KK22

Q11306....... JJ10

Q11307....... JJ11

Q11308....... JJ09

Q11401....... LL21

Q11402....... LL22

Q11403....... LL22

Q11701....... JJ07

Q11702....... JJ07

Q11901....... EE12

Q11902....... EE12

Q11903....... HH10

Q11904....... BB03

Q11906....... HH10

Q13101....... EE23

Q13103....... EE24

Q13104....... EE22

Q13105....... BB23

Q13106....... BB25

Q13107....... CC25

Q13108....... BB23

Q13201....... HH04

Q13202....... EE04

Q13203....... DD04

Q13204....... DD03

Q13205....... HH05

Q13206....... GG05

Q13301....... BB21

Q16500....... GG28

Q16501....... GG27

Q16502....... FF31

Q16503....... GG27

Q16504....... GG27

Q16505....... FF31

Q16506....... HH32

Q16508....... HH25

Q16509....... FF31

Q16510....... FF30

Q18100....... CC32

Q18101....... CC32

Q18102....... BB28

Q18105....... BB30

Q18106....... BB29

Q18109....... BB29

Q18110....... BB29

Q18113....... FF26

Q22301....... CC16

Q22302....... BB16

Q22303....... BB17

Q22304....... CC16

Q22306....... BB15

Q22307....... EE19

Q22308....... EE19

Q22309....... EE19

Q22310....... EE19

Q22311....... CC15

Q22312....... BB15

Q22313....... EE18

Q22314....... DD18

Q22315....... CC18

Q22316....... CC14

Q22317....... DD19

Q22325....... DD26

Q22326....... DD26

Q22402....... EE16

Q22403....... FF18

Page 7A-6

Page 56

DTV307 SECTION 7: COMPONENT LOCATION GUIDES

I/O Circuit Board (Top Side)

Q22404........FF18

Q22405........FF18

Q22406........II24

Q22407........GG19

Q22408........GG19

Q22409........FF17

Q22410........FF17

Q22411........FF17

Q22412........HH22

Q22413........HH22

Q22415........HH22

Q22416........FF15

Q22417........FF15

Q22418........II23

Q38300........GG15

Q38301........HH16

Q38302........HH12

Q38303........HH15

Q38304........HH15

Q38305........HH15

Q38306........II15

Q38307........II16

Q38308........GG13

Q38309........HH13

Q38310........II16

Q38311........II15

Q38312........GG12

Q38313........II15

Q38315........II17

Q38316........GG12

Q38317........HH18

Q38318........II18

Q38319........II18

Q38320........HH18

Q38321........HH19

Q38322........HH19

Q38323........EE14

Q38324........GG17

Q38325........GG16

Q38326........GG16

Q38327........EE14

Q38328........GG17

Q41125........BB03

Q41126........BB03

Q41275........BB12

Q41276........BB13

Q41277........BB12

R11300........JJ08

R11302........JJ08

R11303........JJ09

R11305........KK22

R11306........KK21

R11307........JJ11

R11308........JJ10

R11313........JJ07

R11314........JJ09

R11315........JJ08

R11316........JJ08

R11318........II08

R11321........II09

R11333........MM23

R11334........LL23

R11335........HH09

R11400........MM26

R11401........MM26

R11402........MM27

R11403........LL27

R11404........LL26

R11405........LL26

R11406........MM28

R11407........MM28

R11408........MM28

R11409........LL23

R11410....... LL23

R11411....... MM23

R11412....... KK23

R11413....... MM24

R11414....... MM26

R11416....... MM25

R11418....... KK24

R11419....... MM28

R11420....... LL28

R11421....... LL27

R11423....... LL25

R11426....... LL21

R11427....... LL24

R11428....... LL24

R11435....... LL19

R11437....... LL19

R11438....... MM24

R11439....... MM24

R11440....... LL24

R11442....... MM24

R11443....... LL24

R11444....... LL24

R11445....... LL23

R11446....... KK24

R11447....... LL24

R11448....... MM22

R11466....... KK21

R11467....... KK22

R11468....... LL22

R11470....... JJ13

R11471....... II13

R11473....... II13

R11475....... JJ12

R11476....... JJ12

R11477....... II12

R11479....... JJ12

R11481....... HH12

R11482....... HH12

R11483....... HH12

R11484....... HH12

R11485....... HH12

R11486....... HH12

R11487....... HH13

R11488....... MM24

R11489....... II12

R11490....... JJ13

R11497....... JJ13

R11498....... JJ13

R11499....... KK23

R11501....... GG09

R11502....... GG09

R11503....... GG09

R11504....... FF10

R11505....... FF10

R11506....... GG09

R11508....... FF09

R11700....... FF08

R11701....... JJ07

R11704....... GG07

R11705....... GG07

R11706....... HH07

R11707....... HH08

R11708....... HH08

R11709....... HH07

R11710....... GG08

R11711....... HH08

R11712....... GG07

R11713....... GG07

R11714....... HH07

R11716....... JJ07

R11720....... FF11

R11722....... HH08

R11723....... II07

R11724 ....... FF10

R11725 ....... II07

R11726 ....... II07

R11727 ....... GG07

R11729 ....... GG07

R11730 ....... GG07

R11731 ....... HH07

R11732 ....... GG07

R11734 ....... HH07

R11735 ....... HH07

R11738 ....... GG10

R11800 ....... II09

R11801 ....... JJ09

R11802 ....... JJ09

R11803 ....... HH11

R11804 ....... II11

R11805 ....... II11

R11806 ....... HH11

R11807 ....... HH11

R11808 ....... HH11

R11809 ....... II11

R11810 ....... II11

R11811 ....... JJ09

R11813 ....... HH08

R11814 ....... JJ10

R11815 ....... JJ11

R11816 ....... HH09

R11903 ....... EE12

R11904 ....... FF12

R11905 ....... DD09

R11906 ....... EE09

R11907 ....... EE10

R11908 ....... DD08

R11909 ....... CC05

R11910 ....... EE10

R11911 ....... HH10

R11912 ....... FF13

R11913 ....... EE12

R11914 ....... DD13

R11919 ....... HH09

R11920 ....... II09

R11923 ....... HH09

R11924 ....... CC09

R11925 ....... CC10

R11928 ....... DD09

R11929 ....... DD08

R11930 ....... FF11

R11931 ....... HH11

R11934 ....... CC04

R11935 ....... FF06

R11940 ....... AA20

R11941 ....... AA05

R11942 ....... CC05

R11943 ....... FF09

R11948 ....... CC08

R13101 ....... EE24

R13102 ....... EE23

R13103 ....... DD23

R13108 ....... EE24

R13109 ....... EE24

R13114 ....... DD25

R13116 ....... CC24

R13117 ....... CC24

R13118 ....... CC24

R13119 ....... CC24

R13122 ....... BB23

R13125 ....... EE24

R13127 ....... DD23

R13129 ....... DD22

R13130 ....... EE25

R13132 ....... FF25

R13133 ....... CC24

R13137 ....... BB23

R13140........BB23

R13143........AA19

R13144........DD21

R13146........BB25

R13147........BB25

R13148........DD24

R13149........DD24

R13150........DD24

R13151........DD24

R13152........DD24

R13153........DD25

R13154........CC25

R13155........CC25

R13156........AA23

R13157........DD25

R13158........BB23

R13159........BB23

R13164........DD24

R13166........DD25

R13170........DD21

R13171........CC21

R13174........BB21

R13175........DD23

R13177........BB24

R13178........EE22

R13179........EE22

R13180........DD25

R13183........DD23

R13184........EE21

R13185........EE23

R13186........EE21

R13188........FF21

R13202........HH03

R13203........JJ03

R13204........JJ03

R13205........JJ03

R13214........DD21

R13215........DD22

R13216........DD22

R13217........HH06

R13218........AA24

R13219........AA24

R13221........JJ04

R13222........JJ04

R13223........II02

R13224........II02

R13225........HH02

R13226........HH02

R13227........HH05

R13228........II04

R13229........HH05

R13230........EE04

R13231........DD04

R13232........EE02

R13233........DD03

R13234........EE03

R13235........HH03

R13236........EE05

R13237........EE04

R13238........EE03

R13239........EE04

R13240........DD03

R13241........EE02

R13242........EE04

R13243........FF24

R13244........FF25

R13245........EE05

R13246........HH05

R13247........HH05

R13248........FF24

R13249........GG24

R13250........GG24

R13251........JJ04

R13252........JJ03

R13253........II03

R13254........II03

R13255........HH03

R13256........II02

R13257........JJ03

R13258........JJ03

R13261........FF25

R13264........AA25

R13266........AA25

R13267........AA24

R13268........AA25

R13270........II03

R13271........HH04

R13272........GG04

R13273........DD22

R13274........DD22

R13275........DD21

R13276........AA25

R13278........AA25

R13279........AA24

R13280........AA25

R13282........HH05

R13283........HH05

R13284........DD22

R13285........DD21

R13286........DD21

R13289........FF22

R13293........HH05

R13294........GG04

R13314........CC22

R13316........BB22

R13317........BB22

R13372........CC21

R16506........HH29

R16513........HH26

R16517........GG28

R16523........FF31

R16526........HH27

R16528........GG32

R16529........HH32

R16530........HH33

R16531........HH33

R16532........HH32

R16534........FF32

R16538........EE32

R16539........GG27

R16540........FF30

R16541........DD32

R16542........FF29

R16543........FF29

R16544........HH31

R16545........HH31

R16546........GG28

R16547........GG27

R16548........GG27

R16549........FF30

R16550........GG31

R16551........GG28

R16552........GG26

R16557........FF31

R16558........GG25

R16560........FF32

R16561........FF30

R16562........FF30

R16566........HH26

R16567........FF31

R18100........DD32

R18102........DD32

R18103........CC32

R18104........BB31

R18106........EE29

R18107........DD29

R18113........BB28

R18118........DD28

R18125........CC31

R18126........BB31

R18129........BB30

R18130........CC30

R18131........BB29

R18132........CC30

R18133........BB29

R18134........BB29

R18135........CC29

R18136........BB29

R18137........BB28

R18502........GG25

R22300........BB18

R22301........BB17

R22302........EE19

R22303........EE15

R22304........EE15

R22305........CC18

R22307........EE13

R22308........EE13

R22310........CC18

R22311........CC14

R22312........EE18

R22314........EE19

R22321........AA19

R22322........BB16

R22333........CC14

R22335........AA14

R22336........CC18

R22337........CC18

R22338........FF13

R22340........AA18

R22342........EE20

R22344........BB17

R22345........BB17

R22346........BB18

R22355........JJ20

R22356........DD19

R22358........EE19

R22359........DD19

R22361........DD26

R22362........FF27

R22363........CC16

R22364........CC16

R22365........BB16

R22366........BB16

R22368........CC16

R22369........CC16

R22370........BB16

R22371........BB16

R22373........CC15

R22374........CC15

R22375........BB15

R22376........BB15

R22401........FF15

R22402........FF15

R22403........FF15

R22404........HH22

R22413........FF15

R22414........EE17

R22415........FF17

R22416........FF17

R22417........FF17

R22418........FF17

R22419........GG17

R22420........FF17

R22421........II23

R22422........II23

R22423........GG19

R22424........GG19

R22425........FF18

R22426 ....... FF19

R22427 ....... FF20

R22428 ....... EE19

R22429 ....... FF20

R22430 ....... FF20

R22431 ....... FF19

R22432 ....... FF15

R22433 ....... FF15

R22434 ....... FF14

R22435 ....... FF14

R22436 ....... FF14

R22437 ....... FF14

R22438 ....... II24

R22439 ....... FF14

R22440 ....... FF14

R22441 ....... FF14

R22442 ....... FF14

R22443 ....... FF16

R22444 ....... GG14

R22445 ....... GG14

R22446 ....... GG14

R22447 ....... GG14

R22450 ....... FF19

R22451 ....... HH22

R22452 ....... HH23

R22454 ....... HH23

R22455 ....... II24

R22456 ....... II24

R22457 ....... II22

R22458 ....... HH22

R22459 ....... FF15

R22465 ....... GG22

R22466 ....... GG23

R22467 ....... HH22

R22468 ....... II22

R22470 ....... GG18

R22471 ....... HH19

R38201 ....... JJ14

R38235 ....... KK17

R38236 ....... KK19

R38237 ....... KK14

R38238 ....... KK16

R38239 ....... JJ16

R38240 ....... JJ15

R38241 ....... JJ14

R38242 ....... JJ19

R38243 ....... JJ18

R38244 ....... JJ17

R38249 ....... II17

R38250 ....... II18

R38251 ....... JJ18

R38252 ....... JJ15

R38253 ....... JJ16

R38254 ....... JJ16

R38300 ....... HH14

R38301 ....... GG13

R38302 ....... GG13

R38303 ....... HH17

R38304 ....... HH16

R38305 ....... II15

R38308 ....... HH14

R38309 ....... GG13

R38311 ....... II16

R38312 ....... II16

R38313 ....... HH15

R38314 ....... HH14

R38315 ....... II16

R38316 ....... II16

R38317 ....... II16

R38318 ....... GG15

R38319 ....... GG15

R38320 ....... HH15

R38321 ....... HH16

Page 7A-7

Page 57

DTV307 SECTION 7: COMPONENT LOCATION GUIDES

I/O Circuit Board (Top Side)

R38322........GG15

R38323........HH15

R38324........MM19

R38325........HH16

R38326........GG13

R38327........HH13

R38328........HH13

R38329........HH13

R38330........HH13

R38331........HH15

R38332........II15

R38334........II16

R38336........II19

R38339........II17

R38342........II17

R38344........HH18

R38345........HH17

R38346........HH18

R38347........II19

R38348........II18

R38349........II18

R38350........II18

R38351........II18

R38352....... II19

R38353....... HH19

R38354....... II19

R38355....... HH16

R38356....... II19

R38357....... HH19

R38358....... HH19

R38359....... FF16

R38360....... FF16

R38361....... HH15

R38362....... HH15

R38363....... HH19

R38364....... HH19

R38367....... EE14

R38368....... EE14

R38369....... GG15

R38370....... JJ19

R38372....... HH18

R41127....... CC02

R41128....... AA02

R41129....... BB03

R41130....... AA04

R41131....... AA03

R41132 ....... AA03

R41133 ....... AA20

R41134 ....... CC02

R41274 ....... CC13

R41275 ....... CC13

R41276 ....... CC11

R41277 ....... CC12

R41279 ....... CC13

R41280 ....... BB12

R41281 ....... BB12

R41283 ....... BB13

R41284 ....... BB12

R41285 ....... AA11

R41286 ....... BB13

R41287 ....... BB12

R41288 ....... CC12

SW11900.... LL07

T41200........ BB04

TP11301 ..... MM22

TP11302 ..... LL20

TP11501 ..... HH10

TP11502 ..... GG09

TP11701 ..... GG10

TP11702......GG10

TP11801......GG11

TP11901......AA10

TP11902......CC07

TP11903......EE09

TP11904......FF10

TP11905......FF07

TP11906......FF07

TP18101......DD32

TP18102......DD31

TP18103......DD29

TP18104......DD28

TP18105......EE32

TP18106......CC31

TP18107......CC31

TP22301......BB32

TP22302......CC16

TP22303......EE16

TP22304......DD18

TP22305......EE15

TP22306......EE15

TP22307......CC16

TP22308......CC16

TP22309......CC16

TP22401......FF16

TP22402......FF16

TP22403......FF16

TP38301......GG18

TP38302......MM20

TP38303......MM21

TP41101......BB03

U11301........LL23

U11400........LL23

U11401........MM23

U11402........MM27

U11403........JJ12

U11404........HH12

U11500........FF09

U11700........GG07

U11701........HH07

U11702........GG10

U11800........II10

U11900........EE12

U11901........CC09

U11902........CC08

U13101........CC23

U13102........BB22

U13103........BB24

U13201........II03

U13203........BB25

U13204........GG05

U13205........EE03

U13206........GG24

U16500........HH27

U16501........GG30

U16502........HH32

U18100........CC30

U18101........BB26

U22300........DD16

U22301........II20

U22303........DD26

U22401........FF16

U22402........FF18

U22403........GG18

U22404........FF15

U22405........FF15

U22406........GG15

U22407........HH23

U38200........II17

U38300....... GG12

U38301....... HH14

U38302....... GG16

U38303....... HH15

U38304....... II14

U38305....... HH18

U38306....... II18

U41275....... CC13

WR11901.... CC08

WR13101.... DD23

WR18101.... CC30

WR31601.... HH04

Y13101....... BB23

Y13201....... HH04

Y18100....... DD28

Y22300....... EE15

Y22301....... EE16

Y22401....... GG23

Page 7A-8

Page 58

DTV307 BLOCK DIAGRAMS

DBS Antenna

Keyboard & IR

DTV307 Functional Block Diagram

Pol Ctrl

Audio Inputs

TV Ctrl

Audio Switching

Audio

Amps

Audio

Baseband

Processing

To Internal Speakers

To External Speakers

TV Ctrl

Audio Line Out

To FP A/V Headphone

RF Input A

RF Input B

RF to PIP

TV Ctrl

PIP Comp. Vid.

Video Inputs

S-Vid Inputs

TV Ctrl

tuner

PIP Tuner/IF

NTSC Video Switching

Data Slicer

for CC and EDS

Main Composite NTSC Video

Main

Comb,

PIP, &

PIP

Chroma

Decoder

TV Ctrl

Serial Aync I/P Comm

DM1

Y Pr Pb

TV Ctrl

"2H" Video

Processing

Main Analog Audio

2 Chan Audio

CRT/Defl.

Drivers

(Analog)

To CRT

To Defl. Yokes

TV Ctrl

TV uP

TV chassis control

EEROM

Convergence OSD

Sandcastle/ Beam Limiter

Power Supply/ Deflection / Converg.

LNB Pwr

PFail StatusPol Ctrl

Page 8-1

Color Codes

TV Chassis Boards

Page 59

DTV307 BLOCK DIAGRAMS

POWER SUPPLY

-12Vs

AC IN

OPTO-ISOLATOR

U14601

REGULATOR

U14601

LATCH

Q14602/3

Raw B+

OUT

POWER

OUTPUT

Q14601

OVER-CURRENT

OVER-VOLTAGE

R14606

OUTPUT

POWER

TRANSFORMER

T14600

+5Vfb

+33Vs

+15Vs

+8V USB

+5Vs

+12Vs

+5Vr

Stnby/Run

Switch

(+12Vr)

+76V Filtered

1H SERIES

PASS SCAN

SUPPLY

+67V

CR14809

2.xH ZVS SCAN

SUPPLY

+160V

SCAN B+ Deflection

1H: High

2.xH: Low

2H SCAN

ON/OFF

FROM MICRO

Cold Ground

Hot Ground

ON\OFF

Q14105

OPTO-ISOLATOR

U14102

OPTO-ISOLATOR

U14100

RESONANT

INDUCTOR

L14103

DRIVE

TRANSFORMER

T14101

CONTROL

(RS Latch)

Q14101/3

POWER

OUTPUT

Q14100

OVER-CURRENT OVER-VOLTAGE

R14100 & R14106

REGULATOR

U14101

OUTPUT

POWER

TRANSFORMER

T14100

+76Vr

+15Vr

-15Vr

+24Vr

+31.5Vr

Regulator

To Audio

Tuner

Supply

+12Vr

HV Sample

HV OUT

+210Vr +24Vr +76Vr

HVR B+

XRP

HVR B+

Generator

(IHVT)

Beam

Filament

Limiter

CRT

1/3 Tap

Focus 1 Focus 2

Screen

Focus / Screen

Page 8-4

Page 60

DTV307 BLOCK DIAGRAMS

PHASE_DET

2H_SELECT

OFCS

I2C

LLCS

VERT_SYNC

I2C

H _

S W

LPF

LLC

DEFL

PROCESSOR

WIDTH_ALIGN

DAC

DATA

2H_ENABLE

S C A

N _

P R E S E N

SCAN_LOSS_DETECTOR

HORZ_SYNC

REF

2H_VCC

NAND

VCO

VCO_FREQ

EW_GEOMETRY_WIDTH

PAR

BUFFER

LIN_SW

SCAP_SW DYN_FOC

1H_VCC 1H_VCC

-15VR

VOUT_A

VOUT_B

SCAN

DRIVER

T R F _

D R _

SCAN_GENERATOR

T R F _

D R _

H I

LIMITER

+12VR

SCAN_H

SCA

-REF

PARA

V_YOKE_HI

V_YOKE_LO

IT_PAR_GEN

DYN_FOCUS

BUFFER

AKB_GATE

1H_VCC_BUF

SCAN_ZVS_OFF

AKB

GATE

DF_OUT

V_REF

PK_DET

COMP_BLANK

SCAN_B+

GAIN

OVER_VOLT_DET

FILAMENT

SCAN_LOSS_INT

SCAN

SERIES

PASS

SCAN_ZVS

ZVS OFF

MAIN_ZVS

+15VR

15VR

+25VR

+31VR

OFF/ON

H_PULSE_A

SCAN_LOSS_INT

XRP_DET

SHUTDOWN

FREQ_OFFSET

SCAN_H

XRP_PULSE

+25VR

PLL

DENOTES SIP PIN NUMBER

PUSH_PULL

GATE

HV_GEN

HV_B+

SYNC

OVER_VOLTAGE

HV_PS

+73VR

HV_SENSOR

DEFLECTION

ANODE

+210VR

Page 8-3

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Datasheet DTV306, DTV307 Datasheet

Specifications and Main Features

Frequently Asked Questions

User Manual