Panasonic TH-C50HD18A Service manual

ORDER NO. MTNC080854CE

B34 Canada: B07

50 inch Class 720p Plasma HDTV

Model No. TH-C50HD18A

GPH11DU Chassis

1 Safety Precautions

1.1. General Guidelines

1. When conducting repairs and servicing, do not attempt to modify the equipment, its parts or its materials.

2. When wiring units (with cables, flexible cables or lead wires) are supplied as repair parts and only one wire or some of the wires have been broken or disconnected, do not attempt to repair or re-wire the units. Replace the entire wiring unit instead.

3. When conducting repairs and servicing, do not twist the Faston connectors but plug them straight in or unplug them straight out.

4. When servicing, observe the original lead dress. If a short circuit is found, replace all parts which have been overheated or damaged by the short circuit.

5. After servicing, see to it that all the protective devices such as insulation barriers, ins ulation papers shields are properly installed.

6. After servicing, make the following leakage current checks to prevent the customer from being exposed to shock hazards.

1.1.1. Leakage Current Cold Check

1. Unplug the AC cord and connect a jumper between the two prongs on the plug.

2. Measure the resistance value, with an ohmmeter, between the jumpered AC plug and each exposed metallic cabinet part on the equipment such as screwheads, connectors, control shafts, etc. When the exposed metallic part has a return path to the chassis, the reading should be between 1Mohm and 5.2Mohm. When the exposed metal does not have a return path to the chassis, the reading must be .

1.1.2. Leakage Current Hot Check (See Figure 1.)

1. Plug the AC cord directly into the AC outlet. Do not use an isolation transformer for this check.

2. Connect a 1.5kohm, 10 watts resistor, in parallel with a

0.15μF capacitors, between each exposed metallic part on the set and a good earth ground such as a water pipe, as shown in Figure 1.

3. Use an AC voltmeter, with 1000 ohms/volt or more sensitivity, to measure the potential across the resistor.

4. Check each exposed metallic part, and measure the voltage at each point.

5. Reverse the AC plug in the AC outlet and repeat each of the above measurements.

6. The potential at any point should not exceed 0.75 volts RMS. A leakage current tester (Simpson Model 229 or equivalent) may be used to make the hot checks, leakage current must not exceed 1/2 milliamp. In case a measurement is outside of the limits specified, there is a possibility of a shock hazard, and the equipment should be repaired and rechecked before it is returned to the customer.

Figure 1

2Warning

2.1. Prevention of Electrostatic Discharge (ESD) to Electrostatically Sensitive (ES) Devices

Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field-effect transistors and semiconductor [chip] components. The following techniques should be used to help reduce the incidence of component damage caused by electrostatic discharge (ESD).

1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any ESD on your body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging ESD wrist strap, which should be removed for potential shock reasons prior to applying power to the unit under test.

2. After removing an electrical assembly equipped with ES devices, place the assembly on a conductive surface such as aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly.

3. Use only a grounded-tip soldering iron to solder or unsolder ES devices.

4. Use only an anti-static solder removal device. Some solder removal devices not classified as [anti-static (ESD protected)] can generate electrical charge sufficient to damage ES devices.

5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ES devices.

6. Do not remove a replacement ES device from its protective package until immediately before you are ready to install it. (Most replacement ES devices are packaged with leads electrically shorted together by conductive foam, aluminum foil or comparable conductive material).

7. Immediately before removing the protective material from the leads of a replacement ES device, touch the protective material to the chassis or circuit assembly into which the device will be installed.

Caution

Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.

8. Minimize bodily motions when handling unpackaged replacement ES devices. (Otherwise ham less motion such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity (ESD) sufficient to damage an ES device).

2.2. About lead free solder (PbF)

Note: Lead is listed as (Pb) in the periodic table of elements. In the information below, Pb will refer to Lead solder, and PbF will refer to Lead Free Solder. The Lead Free Solder used in our manufacturing process and discussed below is (Sn+Ag+Cu). That is Tin (Sn), Silver (Ag) and Copper (Cu) although other types are available.

This model uses Pb Free solder in it’s manufacture due to environmental conservation issues. For service and repair work, we’d suggest the use of Pb free solder as well, although Pb solder may be used.

PCBs manufactured using lead free solder will have the PbF within a leaf Symbol PbF stamped on the back of PCB.

Caution

• Pb free solder has a higher melting point than standard solder. Typically the melting point is 50 ~ 70 °F (30~40 °C) higher. Please use a high temperature soldering iron and set it to 700 ± 20 °F (370 ± 10 °C).

• Pb free solder will tend to splash when heated too high (about 1100 °F or 600 °C). If you must use Pb solder, please completely remove all of the Pb free solder on the pins or solder area before applying Pb solder. If this is not practical, be sure to heat the Pb free solder until it melts, before applying Pb solder.

• After applying PbF solder to double layered boards, please check the component side for excess solder which may flow onto the opposite side. (see figure below)

Suggested Pb free solder

There are several kinds of Pb free solder available for purchase. This product uses Sn+Ag+Cu (tin, silver, copper) solder. However, Sn+Cu (tin, copper), Sn+Zn+Bi (tin, zinc, bismuth) solder can also be used.

3 Service Navigation

3.1. Important Notice

3.1.1. MANUFACTURING ID NO.

This service manual is for MANUFACTURING ID NO. TH-C50HD18A as indicated in the label at side and the model name plate of the unit.

3.2. Different P.C.B.

Parts No. Parts name & Description Remarks

TH-C50HD18 TH-C50HD18A TNPH0716ADS TNPH0716AKS CIRCUIT BOARD A PAVCA N0AE6JL00001 LSEP1260MXHB CIRCUIT BOARD P PAVCA

TXNC11RQTU CIRCUIT BOARD C1 PAVCA TXNC21RQTU CIRCUIT BOARD C2 PAVCA TXNC31RQTU CIRCUIT BOARD C3 PAVCA

TNPA4501S CIRCUIT BOARD G PAVCA TNPA4505S CIRCUIT BOARD GH PAVCA

TNPA4139ADS CIRCUIT BOARD GS PAVCA

TNPA4500S CIRCUIT BOARD K PAVCA TNPA4499S CIRCUIT BOARD S PAVCA

TXNSC1RQTUS TXNSC1BCUU CIRCUIT BOARD SC PAVCA

TXNSD1RQTU CIRCUIT BOARD SD PAVCA

TXNSS1RQTU TXNSS1BCUU CIRCUIT BOARD SS PAVCA

TNPA4395S CIRCUIT BOARD SS2 PAVCA TNPA4396S CIRCUIT BOARD SS3 PAVCA

TXNSU1RQTU CIRCUIT BOARD SU PAVCA

3.3. Service Hint

Board Name Function Board Name Function

P Power Supply C1 Data Driver (Lower Right)

C2 Data Driver (Lower Center)

A DC-DC Converter

Speaker out, Sound Processor AV Terminal, AV Switch Digital Signal Processor, Micom, HDMI Interface Peaks Lite 2p Format Converter, Plasma AI, Sub-Field Processor

K Remote receiver, Power LED SS3 Sustain out (Lower) S Power Switch GS SD Card Slot

C3 Data Driver (Lower Left) SC Scan Drive SU Scan out (Upper) SD Scan out (Lower) SS Sustain Drive

SS2 Sustain out (Upper)

G Front Terminal, Key Switch

3.4. Applicable signals

* Mark: Applicable input signal for Component (Y, PB, PR) and HDMI

horizontal frequency (kHz) vertical frequency (Hz) COMPONENT HDMI 525 (480) / 60i 15.73 59.94 * * 525 (480) /60p 31.47 59.94 * * 750 (720) /60p 45.00 59.94 * * 1,125 (1,080) /60i 33.75 59.94 * * 1,125 (1,080)/60p 67.43 59.94 * 1,125 (1,080)/60p 67.50 60.00 * 1,125(1,080)/24p 26.97 23.98 * 1,125(1,080)/24p 27.00 24.00 *

Note

• Signals other than above may not be displayed properly.

• The above signals are reformatted for optimal viewing on your display.

4 Specifications

Power Source AC 120 V, 60 Hz Power Consumption

Maximum 497 W Standby condition 0.2 W

Plasma Display panel

Drive method AC type Aspect Ratio 16:9 Visible screen size 50 inch class (49.9 inches measured diagonally) (W × H × Diagonal) 43.5 inch × 24.4 inch × 49.9 inch (1,106 mm × 622 mm × 1,269 mm) (No. of pixels) 1,049,088 (1,366 (W) × 768 (H))[4,098 × 768 dots]

Sound

Audio Output 20 W [ 10 W + 10 W ] ( 10 % THD )

Channel Capability (Digital/Analog) VHF/ UHF: 2 - 69, CATV: 1 - 135 Operating Conditions

Temperature: 32 °F - 104 °F (0 °C - 40 °C) Humidity: 20 % - 80 % RH (non-condensing)

Connection Terminals

VIDEO IN 1-2 VIDEO: RCA PIN Type × 1 1.0 V [p-p] (75 Ω)

S-VIDEO: Mini DIN 4-pin Y: 1.0 V [p-p] (75 Ω) C: 0.286 V [p-p] (75 Ω) AUDIO L-R: RCA PIN Type × 2 0.5 V [rms]

COMPONENT INPUT 1-2 Y: 1.0 V [p-p] (including synchronization)

PB, PR: ±0.35 V [p-p] AUDIO L-R: RCA PIN Type × 2 0.5 V [rms]

HDMI 1-2 TYPE A Connector × 2

This TV supports [HDAVI Control 3] function.

Card slot SD CARD slot × 1 AV PROG OUT VIDEO: RCA PIN Type × 1 1.0 V [p-p] (75 Ω)

AUDIO L-R: RCA PIN Type × 2 0.5 V [rms]

DIGITAL AUDIO OUT PCM / Dolby Digital, Fiber Optic

FEATURES 3D Y/C FILTER

CLOSED CAPTION V-Chip Photo Viewer HDAVI Control 3

Dimensions (W × H × D)

Including pedestal 47.7 inch × TV Set only 47.7 inch × 31.2 inch × 3.7 inch (1,210 mm × 790.5 mm × 92.5 mm)

Mass

Including pedestal 82.7 lb. (37.5 kg) TV Set only 78.3 lb. (35.5 kg)

33.3 inch × 1

5.3 inch (1,210 mm × 844 mm × 387 mm)

Note

• Design and Specifications are subject to change without notice. Mass and Dimensions shown are approximate.

5 Service Mode

5.1. How to enter into Service Mode

While pressing [VOLUME ( - )] button of the main unit, press [INFO] button of the remote control three times within 2 seconds.

5.1.1. Key command

[1] button...Main items Selection in forward direction [2] button...Main items Selection in reverse direction [3] button...Sub items Selection in forward direction [4] button...Sub items Selection in reverse direction [VOL] button...Value of sub items change in forward direction ( + ), in reverse direction ( - )

5.1.2. Contents of adjustment mode

• Value is shown as a hexadecimal number.

• Preset value differs depending on models.

• After entering the adjustment mode, take note of the value in each item before starting adjustment.

Main item Sub item Sample Data Remark

ADJUST CONTRAST 000

COLOR 3C TINT 03 SUB-BRT 800

WB-ADJ R-CUT 80

G-CUT 80 B-CUT 80 R-DRV FC G-DRV F8 B-DRV D9 ALL-CUT 80 ALL-DRV FC

OPTION BOOT ROM Factory Preset

STBY-SET 00 EMERGENCY ON CLK MODE 00 CLOCK 000

AGING RGBW

COUNT ALL WHITE ALL RED ALL GREEN ALL BLUE ON/OFF RAMP WHITE RAMP RED RAMP GREEN RAMP BLUE 1% WINDOW COLOR BAR A-ZONE B-ZONE/4 TRIO SCROLL WHITE FLAME

RM-SET CODE A Fixed

SRV-TOOL - See next

5.1.3. How to exit

Switch off the power with the [POWER] button on the main unit or the [POWER] button on the remote control.

5.2. Service tool mode

5.2.1. How to access

1. Select [SRV-TOOL] in Service Mode.

2. Press [OK] button on the remote control.

5.2.2. Display of SOS History

SOS History (Number of LED blinking) indication. From left side; Last SOS, before Last, three occurrence before, 2nd occurrence after shipment, 1st occurrence after shipment. This indication except 2nd and 1st occurrence after shipment will be cleared by [Self-check indication and forced to factory shipment setting].

5.2.3. POWER ON TIME/COUNT

Note : To display TIME/COUNT menu, highlight position, then press MUTE for (3sec). Time : Cumulative power on time, indicated hour : minute by decimal Count : Number of ON times by decimal Note : This indication will not be cleared by either of the self-checks or any other command.

5.2.4. Exit

1. Disconnect the AC cord from wall outlet.

5.3. Hotel mode

1. Purpose Restrict a function for hotels.

2. Access command to the Hotel mode setup menu In order to display the Hotel mode setup menu, please enter the following command (within 2 second). [TV] : Vol. [Down] + [REMOTE] : TV/VIDEO (3 times)

Then, the Hotel mode setup menu is displayed.

3. To exit the Hotel mode setup menu Disconnect AC power cord from wall outlet.

4. Explain the Hotel mode setup menu

item Function Mode Select hotel mode ON/OFF Input Select input signal modes.

Set the input, when each time power is switched on. Selection:

-/RF/COMP1/COMP2/HDMI1/HDMI2 VIDEO1/VIDEO2

• Off: give priority to a last memory.

Channel Select channel when input signal is RF.

Set the channel, each time power is switched on. Selection: Any channel number or [-]. [-] means the channel when turns off.

Volume Adjust the volume when each time power is

switched on. Range: 0 to 100

Vol. Max Adjust maximum volume.

Range: 0 to 100

OSD Ctrl Restrict the OSD.

Selection: OFF/PATTERN1

• OFF: No restriction

• PATTERN1: restriction

FP Ctrl Select front key conditions.

Selection: Off/Pattern1/All

• Off: altogether valid.

• Pattern: only input key is valid.

• All: altogether invalid.

Pow Ctrl Select POWER-ON/OFF condition when AC

power cord is disconnected and then connected. OFF: The same condition when AC power cord is disconnected. ON: Forced power ON condition.

6 Troubleshooting Guide

Use the self-check function to test the unit.

1. Checking the IIC bus lines

2. Power LED Blinking timing

6.1. Check of the IIC bus lines

6.1.1. How to access

Self-check indication only: Produce TV reception screen, and while pressing [VOLUME ( - )] button on the main unit, press [OK] button on the remote control for more than 3 seconds. Self-check indication and forced to factory shipment setting: Produce TV reception screen, and while pressing [VOLUME ( - )] button on the main unit, press [MENU] button on the remote control for more than 3 seconds.

6.1.2. Exit

Disconnect the AC cord from wall outlet.

6.1.3. Screen display

6.1.4. Check Point

Confirm the following parts if NG was displayed.

6.2. Power LED Blinking timing chart

1. Subject Information of LED Flashing timing chart.

2. Contents When an abnormality has occurred the unit, the protection circuit operates and reset to the stand by mode. At this time, the defective block can be identified by the number of blinks of the Power LED on the front panel of the unit.

6.3. No Power

First check point There are following 2 states of No Power indication by power LED.

1. No lit

2. Red is lit then turns red blinking a few seconds later. (See 6.2.)

6.4. No Picture

6.5. Local screen failure

Plasma display may have local area failure on the screen. Fig-1 is the possible defect P.C.B. for each local area.

Fig-1

7 Disassembly and Assembly Instructions

Caution:

Exchange printed circuit board after confirm parts number.

Parts name & Description Parts No. CIRCUIT BOARD A TNPH0716AKS CIRCUIT BOARD P LSEP1260MXHB

7.1. Remove the Back cover

1. See Service Hint (Section 3)

7.2. Remove the Rear Terminal cover

1. Remove the screws (×4 , ×2 ).

2. Remove the Rear Terminal cover.

7.4. Remove the A-Board unit

1. Unlock the cable clampers to free the cable.

2. Disconnect the connectors (A1, A7, A12, A25, A51 and A52).

3. Disconnect the flexible cables (A20, A31 and A32).

4. Remove the screws (×5 ) and remove the A-Board unit.

7.3. Remove the P-Board

Caution:

To remove P.C.B. wait 1 minute after power was off for discharge from electrolysis capacitors.

1. Unlock the cable clampers to free the cable

2. Disconnect the connectors (P2, P6, P7, P9, P11, P12 and P25).

3. Remove the screws (×10 ) and remove the P-Board.

7.5. Remove the A-Board

1. Remove the A-Board unit. (See section 7.4.)

2. Remove the screws (×5 ) and remove the A-Board.

7.6. Remove the SU-Board

1. Remove the flexible cables (SU1, SU2, SU3 and SU4) connected to the SU-Board.

2. Remove the flexible cable (SU11-SD11) and the bridge connector (SC41-SU41).

3. Remove the molding prop (×1 ).

4. Remove the screws (×4 ) and remove the SU-Board.

7.8. Remove the SC-Board

1. Remove the SU-Board and SD-Board. (See section 7.6. and 7.7.)

2. Unlock the cable clampers to free the cable.

3. Disconnect the connector (SC2).

4. Disconnect the flexible cable (SC20).

5. Remove the screws (×6 ) and remove the SC-Board.

7.7. Remove the SD-Board

1. Remove the flexible cables (SD1, SD2, SD3 and SD4) connected to the SD-Board.

2. Remove the flexible cable (SU11-SD11) and the bridge connectors (SC42-SD42 and SC46-SD46).

3. Remove the molding prop (×1 ).

4. Remove the screws (×4 ) and remove the SD-Board.

7.9. Remove the SS2-Board

1. Disconnect the connector (SS02) and disconnect the flexible cable (SS52).

2. Remove the screws (×2 ) and remove the SS2-Board.

7.10. Remove the SS3-Board

1. Disconnect the connector (SS03) and disconnect the flexible cable (SS57).

2. Remove the screws (×2 ) and remove the SS3-Board.

7.12. Remove the Stand brackets

1. Remove the Plasma panel section from the servicing stand and lay on a flat surface such as a table (covered) with the Plasma panel surface facing downward.

2. Remove the Stand brackets (L, R) fastening screws (×5

each) and remove the Stand brackets (L, R).

7.11. Remove the SS-Board

1. Unlock the cable clampers to free the cable.

2. Disconnect the connectors (SS02 and SS03).

3. Disconnect the connectors (SS11, SS12 and SS23).

4. Remove a short-jumper connector SS34 and re-use for new SS-Board.

5. Disconnect the flexible cables (SS54 and SS55).

6. Remove the molding prop (×1 ).

7. Remove the screws (×5 ) and remove the SS-Board.

7.13. Remove the C1-Board

1. Remove the A-Board unit. (See section 7.4.)

2. Remove the Stand bracket R. (See section 7.12.)

3. Remove the flexible cables holder fastening screws (×10 ).

4. Disconnect the flexible cables (CB1, CB2, CB3, CB4 and

CB5).

5. Disconnect the flexible cables (C10 and C11).

6. Remove the screws (×6 ) and remove the C1-Board.

7.16. Remove the Front bracket

1. Unlock the cable clampers to free the cable.

2. Disconnect the connectors (A51 and A52). (See section

7.4.)

3. Remove the screws (×2 , ×2 ) and remove the Front bracket.

7.14. Remove the C2-Board

1. Remove the A-Board unit. (See section 7.4.)

2. Remove the stand bracket L. (See section 7.12.)

3. Remove the flexible cables holder fastening screws (×6 ).

4. Disconnect the flexible cables (CB6, CB7 and CB8).

5. Disconnect the flexible cables (C20 and C21).

6. Disconnect the connector (C22).

7. Remove the screws (×4 ) and remove the C2-Board.

7.15. Remove the C3-Board

1. Remove the A-Board unit. (See section 7.4.)

2. Remove the flexible cables holder fastening screws (×6 ).

3. Disconnect the flexible cables (CB9, CB10 and CB11).

4. Disconnect the flexible cable (C32).

5. Disconnect the connector (C33).

6. Remove the screws (×4 ) and remove the C3-Board.

7.17. Remove the G-Board and GSBoard

1. Remove the Front bracket. (See section 7.16.)

2. Remove the screws (×2 ).

3. Remove the screws (×3 ).

4. Remove the Front shield case front.

5. Disconnect the connector (GS52).

6. Remove the screws (×2 ).

7. Remove the Front shield top.

8. Remove the screws (×2 ) and remove the GS-Board.

9. Remove the screws (×3 ).

10. Disconnect the connector (G51) and remove the GBoard.

7.18. Remove the Speakers

1. Disconnect the relay connectors

2. Remove the screws (×4 each) and remove the Speaker (L, R).

2. Remove the cabinet assy and the plasma panel fastening screws (×8 ).

3. For leaving the plasma panel from the front frame, pull the bottom of the cabinet assy forward, lift, and remove.

7.19. Remove the Plasma panel section from the Cabinet assy (glass)

1. Remove the stand brackets (left, right) fastening screw (×1 each).

4. Remove the spacers and spacer rings (×6 ).

7.20. Remove the S-Board

1. Remove the Cabinet assy. (See section 7.19.)

2. Disconnect the connector (S2).

3. Remove the screws (×2 ) and remove the S-Board metal frame.

7.22. Replace the plasma panel (finished)

1. Place the new plasma panel (finished) on the flat surface of the table (covered by a soft cloth), with the plasma panel surface facing downward.

2. Attach the C1-Board, C2-Board and the C3-Board, connect the flexible cables (×11) from the plasma panel to the C1-Board, C2-Board and the C3-Board, and fit the flexible cable holders.

3. Attach the Hooks (left, right) and fit the stand brackets (L, R) to the new plasma panel.

4. Place the plasma panel section on the servicing stand.

5. Attach the cabinet assy and each P .C.Board and so on, to the new plasma panel.

*When fitting the cabinet assy, be careful not to allow any debris, dust or handling residue to remain between the front glass and plasma panel.

4. Remove the screws (×2 ) and remove the S-Board.

7.21. Remove the K-Board

1. Remove the Cabinet assy. (See section 7.19.)

2. Remove the S-Board. (See section 7.20.)

3. Remove the screws (×2 ).

4. Disconnect the connector (K1) and Remove the K-Board.

8 Measurements and Adjustments

8.1. Adjustment Procedure

8.1.1. Driver Set-up

8.1.1.1. Item / Preparation

1. Input a white signal to plasma video input.

2. Set the picture controls as follows. Picture menu: Vivid Normal: Set Aspect: Full

Caution

1. First perform Vsus adjustment.

2. Confirmation of Vscn voltage should be performed after confirmation of Vad adjustment. When Vad=-149V, Voltage of Vscn is -4V ±4V.

8.1.1.2. Adjustments

Adjust driver section voltages referring the panel data on the panel data label. Check or adjust the following voltages with the multimeter.

Name Test Point Voltage Volume Remarks

Vsus TPVSUS

(SS)

Ve TPVE (SS) Ve ± 1V VR16000

Vset TPVSET

(SC)

Vad TPVAD (SC) -149V ± 1V VR16600

Vscn TPVSCN

(SC)

Vda TPVDA (SS) 75V + 1V, -2V Fixed

*See the Panel label.

Vsus ± 2V R628 (P) *

(SS)

320V + 7V, -9V Fixed

(SC)

Vad+145V ± 4V Fixed

8.1.2. Initialization Pulse Adjust

1. Input the White signal to plasma video input.

2. Set the picture controls as follows. Picture menu : Vivid Normal : Set Aspect : Full

3. Connect Oscilloscope to TPSC1 (SC). Check the voltage (T2) at 100μs period on the down slop.

Test point Volume Level

T2 TPSC1 (SC) VR16602 (SC) 210 V ± 10 V

8.1.3. P.C.B. (Printed Circuit Board) exchange

8.1.3.1. Caution

1. To remove P.C.B. , wait 1 minute after power was off for discharge from electrolysis capacitors.

8.1.3.2. Quick adjustment after P.C.B. exchange

Adjust the following voltages with the multimeter.

P.C.B. Name Test Point Voltage Volume Remarks P Board Vsus TPVSUS (SS) Vsus ± 2V R628 (P) * SC Board Vad TPVAD (SC) -149V ± 1V VR16600 (SC) SS Board Ve TPVE (SS) Ve ± 1V VR16000 (SS) * A Board White balance and Sub brightness for NTSC, PAL, HD, PC and 625i signals

*See the Panel label.

Caution:

Absolutely do not reduce Vsus below Ve not to damage the P.C.B.

8.1.4. Adjustment Volume Location

8.1.5. Test Point Location

8.2. Adjustment

8.2.1. White balance adjustment

Name of measuring instrument Connection Remarks

• W/B pattern

• Color analyzer (Minolta CA-100 or equivalent)

Procedure Remarks

• Make sure the front panel to be used on the final set is fitted.

• Make sure a color signal is not being shown before adjustment.

• Put the color analyzer where there is little color variation.

1. Output a white balance pattern.

2. Check that the color temperature is [Cool].

3. Set to serviceman mode, WB-ADJ.

4. Set [R-CUT] [G-CUT] [B-CUT] the values written in table 1.

5. Attach the sensor of color analyzer to the center of highlight window.

6. Fix G drive at C0h and adjust [B-DRV] and [R-DRV] so x, y value of color analyzer become the [Color temperature High] in table 2.

7. Increase RGB together so the maximum drive value in RGB becomes FC. That is, set [ALL DRIVE] to FC. Execute adjustment again. When tha t, the maximum value of R/G/B DRV should be FC, and either R/G/B DRV should be FC.

8. Set color temperature to [Normal].

9. Set [R-CUT] [G-CUT] [B-CUT] the values written in table 1.

10. Attach the sensor of color analyzer to the center of highlight window.

11. Fix G drive at C0h and adjust [B-DRV] and [R-DRV] so x, y value of color analyzer become the [Color temperature Mid] in table 2.

12. Increase RGB together so the maximum drive value in RGB becomes FC. That is, set [ALL DRIVE] to FC. Execute adjustment again. When tha t, the maximum value of R/G/B DRV should be FC, and either R/G/B DRV should be FC.

13. Set color temperature to [Warm].

14. Set [R-CUT] [G-CUT] [B-CUT] the values written in table 1.

15. Attach the sensor of color analyzer to the center of highlight window.

16. Fix G drive at C0h and adjust [B-DRV] and [R-DRV] so x, y value of color analyzer become the [Color temperature Low] in table 2.

17. Increase RGB together so the maximum drive value in RGB becomes FC. That is, set [ALL DRIVE] to FC. Execute adjustment again. When tha t, the maximum value of R/G/B DRV should be FC, and either R/G/B DRV should be FC.

18. Set color temperature to [Cool].

Component input Panel surface

- adjustment of [Normal] [Warm] by data shift from [Cool] adjust. For [Normal] [Warm] adjustment, set values that the adjusted value of [Cool] plus the figures wrote below.

When the measurement data is not in the following tolerance by the shipping confirmation, please re-adjust. Tolerance : ( x , y ) = ( setting data±0.007, setting data±0.007)

19. Copy values adjusted by HD pattern to the NTSC data area of EEPROM.

9 Block Diagram

(LED:6TIMES)

(LED:10TIMES)

(LED:4TIMES)

(LED:12TIMES)

(LED:7TIMES)

(LED:2TIMES)

(LED:3TIMES)

(LED:5TIMES)

(LED:8TIMES)

(LED:6TIMES)

(LED:10TIMES)

(LED:4TIMES)

(LED:12TIMES)

(LED:7TIMES)

(LED:2TIMES)

(LED:3TIMES)

(LED:5TIMES)

(LED:8TIMES)

SUB+9V DET

A20

REMOTE IN

+1.8V(S)

DIGITAL VIDEO DATA

+3.3V(STB)

SUB+9V

SOS8_SS

+5V(STB)

+1.2V(P)

+2.5V(P)

DCDC

GenX5

DCDC

+9V(S)

DDR

Y,PB,PR

MONITOR OUT

L,R

A51

SPEAKER(L)

Peaks Lite2p

PANEL STATUS

+3.3V(P)

from

DCDC

F15V

SOUND SOS

+9V(S)

A25

GenX6

+5V(S)

+15V(P)

+3.3V(P)

F+15V

L,R

SUB+5V DET

+1.2V(P)

+15V(P) DET

CLKGEN

MONITOR L,R

SD CARD

PWM AUDIO OUT

SLOT

+5V(P) DET

A52

EEPROM

+3.3V(S)

C11

IIC1

+30V(BT)

AUDIO AMP

+1.2V(S)

TUNER SOS

R/G/B

TUNER

PANEL SOS

HDMI AUDIO

VIDEO DATA

SUB+1.8V

SOS7_SC2

POWER SOS

Y,PB,PR

CONTROL SIGNAL

+15V(P)

TEMP SENSOR

SUB+3.3V DET

L,R

+5V(P)

DCDC

SC20

HDMI1

+5V(S)

+3.3V(P)

+3.3V(STB)

RESET

+15V(P)

SBO2 SBI2

+3.3V(STB)

DTV_V

L,R

COMP2

COMP1

C21

+9V(S)

RESET

+3.3V(STB_D)

DCDC

P6,P7

PANEL STB_ON

+3.3V(S)

LVDS DATA

A31

P25

+15V(S)

DTV AUDIO

A32

F+15V

HDMI2

+3.3V(S)

KEYSCAN1

VIDEO2

+15V(P)

EEPROM

VIDEO1

A12

+5V(P)

V,Y, C

+5V(P)

+15V(SND)

DCDC

+5V(P)

SUB+5V

+3.3V(P) DET

to/from

L,R

+5V(P)

to/from

SOUND SOS

CH0 DATA

+15V(SND)

SD BOOT

+2.5V(P)

KEYSCAN1

SUB+3.3V

LVDS DATA

TUNER SOS

LED(R)

G51

SUB+1.2V

RESET

SOS8_SS

L,R

Y,C , V

GS52

+3.3V(S)

DDR2

+5V(S)

POWER LED(R)

SOS6_SC1

to/from

SPEAKER(R)

AUDIO SW

VIDEO SW

SD CARD DATA

HDMI I/F RECEIVER

10bit A/D

OPTICAL OUT

DTV AUDIO

FRONT END PROCESSOR

CH0 DATA

POWER SOS

PROCESSOR

SOUND

REMOTE RECEIVER

POWER

SWITCH

KEYSCAN3

OUT

AUDIO

OPTICAL

OPTICAL OUT

SOUND SOS DET CIRCUIT

TUNER SOS DET CIRCUIT

PANEL STB_ON

PANEL STATUS

PANEL SOS

FLASH MEMORY

SCAN CONTROL

SUSTAIN CONTROL

PLASMA AI

LVDS RECEIVER

SYNC PROCESSING

CLOCK GENE.

SUB-FIELD PROCESSING

VIDEO DATA

DISCHARGE CONTROL

STB MCU

PANEL MICOM

PANEL MAIN ON

KEY SWITCH

FRONT TERMINAL

SD CARD SLOTGS

DIGITAL SIGNAL PROCESSOR

POWER SWITCH

POWER LED

REMOTE RECEIVER

L,R

+5V(STB)

BT+30V

+9V(S)

+3.3V(STB)

+30V(BT)

STB+3.3V

+5V(STB)

+5V(S)

TH-C50HD18A Block Diagram (1/5)

(LED:12TIMES)

(LED:10TIMES)

(LED:12TIMES)

(LED:10TIMES)

9.1. Block Diagram (1/5)

(LED

8 TIME)

(LED

6 TIMES)

(LED

7 TIMES)

HOT

COLD

(LED

4 TIME)

C21

C10

C32

+5V(P)

C22

+5V(P)

C20

C11

SS34

SC42

VSUS

SOS6_SC1

SD42

SS12

SC2

SOS7_SC2

SC41

SU11

Main Block(Tuner side)

SD11

SC20

SU41

A31

SS23

A32

SS11

A20

VSUS

SS21

SS02

SS03

SS22

C33

+5V(P)

+5V(STB)

VSUS

MAIN SW2

Vda

VSUS

RELAY

LINE FILTER

RECTIFIER

STANDBY VOLTAGE CONTROL

P11

P-BOARD SOS DETECT

MAIN SW1

+5V(P)

Vda

+15V(P)

F+15V

SUSTAIN VOLTAGE CONTROL

SUSTAIN VOLTAGE RECTIFIER

PROCESS VOLTAGE RECTIFIER

POWER FACTOR CONTROL

PROCESS VOLTAGE CONTROL

P12

STANDBY VOLTAGE RECTIFIER

ADDRESS VOLTAGE (VE)

ERASE PULSE

+15V(P)

MAIN SW1

Vda

MAIN SW1

MAIN SW2

SUSTAIN PULSE

SOS8_SS

SS-BOARD SOS DETECT

SUSTAIN CONTROL

+5V(P)

MAIN SW2

VIDEO DATA

VdaVda

SOS8_SS

+5V(P)

SUSTAIN CONTROL

+5V(P)

VIDEO DATA

SC-BOARD FLOATING PART SOS DETECT

SC-BOARD ENERGY RECOVERY SOS DETECT

+5V(P)

+15V(P)

SOS8_SS

SUSTAIN CONTROL

Vda

VIDEO DATA

DATA DRIVER

SCAN CONTROL

SCAN OUT (LOWER)

DATA DRIVER (CENTER)

DATA DRIVER (RIGHT)

SCAN OUT (UPPER)

POWER SUPPLY

SCAN DRIVE

SUSTAIN DRIVESS

DATA DRIVER (LEFT)

SUSTAINSS3 CONNECTOR (LOWER)

CONNECTOR

SUSTAIN

(UPPER)

SS2

CONTROL PULSE

SCAN PULSE

VOLTAGE GENERATOR

SCAN DRIVER

SUSTAIN PULSE

F+15V

+15V(SND)

+5V(STB)

P25

PS SOS

+5V(P)

+15V(P)

POWER MICOM

ON/OFF CONTROL

SC46

SCAN DRIVER

SD46

AC CORD

(LED 8 TIME)

(LED

6 TIMES)

(LED

7 TIMES)

HOTCOLD

(LED

4 TIME)

TH-C50HD18A Block Diagram (2/5)

9.2. Block Diagram (2/5)

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