Samsung HCJ552 Service Manual

PROJECTION TV RECEIVER

Chassis : P51A Model: HCJ552WX/XAA

PROJECTION TV RECEIVER CONTENTS

Precautions

Reference Information

Specifications

Alignment and Adjustments

Troubleshooting

Exploded View and Parts List

Electrical Parts List

Block Diagrams

Wiring Diagram

Schematic Diagrams

10.

ELECTRONICS

Printed in Korea

3P51A-5501

1. Precautions

1-1 Safety Precautions

1. Be sure that all of the built-in protective devices are replaced. Restore any missing protective shields.

2. When reinstalling the chassis and its assemblies, be sure to restore all protective devices, including: nonmetallic control knobs and compartment covers.

3. Make sure that there are no cabinet openings through which peopleÑparticularly childrenÑmight insert fingers and contact dangerous voltages. Such openings include the spacing between the picture tube and the cabinet mask, excessively wide cabinet

ventilation slots, and improperly fitted back

covers.

If the measured resistance is less than 1.0 megohm or greater than 5.2 megohms, an abnormality exists that must be corrected before the unit is returned to the customer.

4. Leakage Current Hot Check (Figure 1-1): Warning: Do not use an isolation transformer during this test. Use a leakagecurrent tester or a metering system that complies with American National Standards Institute (ANIS C101.1, Leakage Current for Appliances), and Underwriters Laboratories (UL Publication UL1410, 59.7).

5. With the unit completely reassembled, plug the AC line cord directly into the power outlet. With the unitÕs AC switch first in the ON position and then OFF, measure the current between a known earth ground (metal water pipe, conduit, etc.) and all exposed metal parts, including: antennas, handle brackets, metal cabinets, screwheads and control shafts. The current measured should not exceed 0.5 milliamp. Reverse the powerplug prongs in the AC outlet and repeat the test.

Fig. 1-1 AC Leakage Test

6. Antenna Cold Check: With the unitÕs AC plug disconnected from the AC source, connect an electrical jumper across the two AC prongs. Connect one lead of the ohmmeter to an AC prong. Connect the other lead to the coaxial connector.

7. X-ray Limits: The picture tube is especially designed to prohibit X-ray emissions. To ensure continued X-ray protection, replace the picture tube only with one that is the same type as the original. Carefully reinstall the picture tube shields and mounting hardware; these also provide X-ray protection.

8. High Voltage Limits: High voltage must be measured each time servicing is done on the B+, horizontal deflection or high voltage circuits. Correct operation of the X-ray protection circuits must be reconfirmed whenever they are serviced.

(X-ray protection circuits also may be called

Òhorizontal disableÓ or Òhold-downÓ.)

Heed the high voltage limits. These include the XÐray Protection Specifications Label, and the Product Safety and X-ray Warning Note on the service data schematic.

Precautions

Samsung Electronics 1-1

LEAKAGE CURRENT

TESTER

DEVICE UNDER

TEST

TEST ALL

EXPOSED METAL

SURFACES

3-WIRE CORD

ALSO TEST WITH

PLUG REVERSED

(USING AC ADAPTER

PLUG AS REQUIRED)

EARTH

GROUND

(READING SHOULD

NOT BE ABOVE

0.5mA)

Follow these safety, servicing and ESD precautions to prevent damage and protect against potential hazards such as electrical shock and X-rays.

1-1 Safety Precautions (Continued)

9. High voltage is maintained within specified limits by close-tolerance, safety-related components and adjustments. If the high voltage exceeds the specified limits, check each of the special components.

10. Design Alteration Warning: Never alter or add to the mechanical or electrical design of this unit. Example: Do not add auxiliary audio or video connectors. Such alterations might create a safety hazard. Also, any design changes or additions will void the manufacturerÕs warranty.

11. Hot Chassis Warning: Some TV receiver chassis are electrically connected directly to one conductor of the AC power cord. If an isolation transformer is not used, these units may be safely serviced only if the AC power plug is inserted so that the chassis is connected to the ground side of the AC source.

To confirm that the AC power plug is inserted correctly, do the following: Using an AC voltmeter, measure the voltage between the chassis and a known earth ground. If the reading is greater than 1.0V, remove the AC power plug, reverse its polarity and reinsert. Re-measure the voltage between the chassis and ground.

12. Some TV chassis are designed to operate with 85 volts AC between chassis and ground, regardless of the AC plug polarity. These units can be safely serviced only if an isolation transformer inserted between the receiver and the power source.

13. Some TV 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.

14. Components, parts and wiring that appear to have overheated or that are otherwise damaged should be replaced with parts that meet the original specifications. Always determine the cause of damage or overheating, and correct any potential hazards.

15. Observe the original lead dress, especially near the following areas: Antenna wiring, sharp edges, and especially the AC and high voltage power supplies. Always inspect for pinched, out-of-place, or frayed wiring. Do not change the spacing between components and the printed circuit board. Check the AC power cord for damage. Make sure that leads and components do not touch thermally hot parts.

16. Picture Tube Implosion Warning: The picture tube in this receiver employs Òintegral implosionÓ protection. To ensure continued implosion protection, make sure that the replacement picture tube is the same as the original.

17. Do not remove, install or handle the picture tube without first putting on shatterproof goggles equipped with side shields. Never handle the picture tube by its neck. Some Òin-lineÓ picture tubes are equipped with a permanently attached deflection yoke; do not try to remove such Òpermanently attachedÓ yokes from the picture tube.

18. Product Safety Notice: Some electrical and mechanical parts have special safety-related characteristics which might not be obvious from visual inspection. These safety features and the protection they give might be lost if the replacement component differs from the originalÑeven if the replacement is rated for higher voltage, wattage, etc.

Components that are critical for safety are indicated in the circuit diagram by shading, ( ) or ( ).

Use replacement components that have the same ratings, especially for flame resistance and dielectric strength specifications. A replacement part that does not have the same safety characteristics as the original might create shock, fire or other hazards.

Precautions

1-2 Samsung Electronics

1-2 Servicing Precautions

1. Servicing precautions are printed on the cabinet. Follow them.

2. Always unplug the unitÕs AC power cord from the AC power source before attempting to: (a) Remove or reinstall any component or assembly, (b) Disconnect an electrical plug or connector, (c) Connect a test component in parallel with an electrolytic capacitor.

3. Some components are raised above the printed circuit board for safety. An insulation tube or tape is sometimes used. The internal wiring is sometimes clamped to prevent contact with thermally hot components. Reinstall all such elements to their original position.

4. After servicing, always check that the screws, components and wiring have been correctly reinstalled. Make sure that the portion around the serviced part has not been damaged.

5. Check the insulation between the blades of the AC plug and accessible conductive parts (examples: metal panels, input terminals and earphone jacks).

6. Insulation Checking Procedure: Disconnect the power cord from the AC source and turn the power switch ON. Connect an insulation resistance meter (500V) to the blades of the AC plug.

The insulation resistance between each blade of the AC plug and accessible conductive parts (see above) should be greater than 1 megohm.

7. Never defeat any of the B+ voltage interlocks. Do not apply AC power to the unit (or any of its assemblies) unless all solid-state heat sinks are correctly installed.

8. Always connect a test instrumentÕs ground lead to the instrument chassis ground before connecting the positive lead; always remove the instrumentÕs ground lead last.

9. When some parts inside the optical engine (except lamp) are damaged, replace the whole optical engine.

Precautions

Samsung Electronics 1-3

Warning 1 : First read the “Safety Precautions” section of this manual. If some unforeseen circumstance creates a

conflict between the servicing and safety precautions, always follow the safety precautions.

Warning 2 : An electrolytic capacitor installed with the wrong polarity might explode.

1-3 Precautions for Electrostatically Sensitive Devices (ESDs)

1. Some semiconductor (Òsolid stateÓ) devices are easily damaged by static electricity. Such components are called Electrostatically Sensitive Devices (ESDs); examples include integrated circuits and some field-effect transistors. The following techniques will reduce the occurrence of component damage caused by static electricity.

2. Immediately before handling any semicon ductor components or assemblies, drain the electrostatic charge from your body by touching a known earth ground. Alternatively, wear a discharging wrist-strap device. (Be sure to remove it prior to applying powerÑ this is an electric shock precaution.)

3. After removing an ESD-equipped assembly, place it on a conductive surface such as aluminum foil to prevent accumulation of electrostatic charge.

4. Do not use freon-propelled chemicals. These can generate electrical charges that damage ESDs.

5. Use only a grounded-tip soldering iron when soldering or unsoldering ESDs.

6. Use only an anti-static solder removal device. Many solder removal devices are not rated as Òanti-staticÓ; these can accumulate sufficient electrical charge to damage ESDs.

7. Do not remove a replacement ESD from its protective package until you are ready to install it. Most replacement ESDs are packaged with leads that are electrically shorted together by conductive foam, aluminum foil or other conductive materials.

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

9. Minimize body motions when handling unpackaged replacement ESDs. Motions such as brushing clothes together, or lifting a foot from a carpeted floor can generate enough static electricity to damage an ESD.

Precautions

1-4 Samsung Electronics

Reference Information

Samsung Electronics 2-1

2. Reference Information

2-1 Tables of Abbreviations and Acronyms

A Ah Å dB dBm

°C °F °K F G GHz g H Hz h ips kWh kg kHz kΩ km km/h kV kVA kW I MHz

Ampere Ampere-hour Angstrom Decibel Decibel Referenced to One Milliwatt Degree Celsius Degree Fahrenheit degree Kelvin Farad Gauss Gigahertz Gram Henry Hertz Hour Inches Per Second Kilowatt-hour Kilogram Kilohertz Kilohm Kilometer Kilometer Per Hour Kilovolt Kilovolt-ampere Kilowatt Liter Megahertz

MV MW MΩ m µA µF µH µm µs µW mA mg mH mI mm ms mV nF

Ω

pF Ib rpm rps s V VA W Wh

Megavolt Megawatt Megohm Meter Microampere Microfarad Microhenry Micrometer Microsecond Microwatt Milliampere Milligram Millihenry Milliliter Millimeter Millisecond Millivolt Nanofarad Ohm Picofarad Pound Revolutions Per Minute Revolutions Per Second Second (Time) Volt Volt-ampere Watt Watt-hour

Table 2-1 Abbreviations

Reference Information

2-2 Samsung Electronics

Table 2-2 Table of Acronyms

ABL AC ACC AF AFC AFT AGC AM ANSI APC APC A/V AVC BAL BPF B-Y CATV CB CCD CCTV Ch CRT CW DC DVM EIA ESD ESD FBP FBT FF FM FS GND G-Y H HF HI-FI IC IC IF

Automatic Brightness Limiter Alternating Current Automatic Chroma Control Audio Frequency Automatic Frequency Control Automatic Fine Tuning Automatic Gain Control Amplitude Modulation American National Standards Institute Automatic Phase Control Automatic Picture Control Audio-Video Automatic Volume Control Balance Bandpass Filter Blue-Y Community Antenna Television (Cable TV) Citizens Band Charge Coupled Device Closed Circuit Television Channel Cathode Ray Tube Continuous Wave Direct Current Digital Volt Meter Electronics Industries Association Electrostatic Discharge Electrostatically Sensitive Device Feedback Pulse Flyback Transformer Flip-Flop Frequency Modulation Fail Safe Ground Green-Y High High-Frequency High Fidelity Inductance-Capacitance Integrated Circuit Intermediate Frequency

I/O L L LED LF MOSFET MTS NAB NEC NTSC OSD PCB PLL PWM QIF R RC RF R-Y SAP SAW SIF SMPS S/N SW TP TTL TV UHF UL UV VCD VCO VCXO VHF VIF VR VTR VTVM TR

Input/output Left Low Light Emitting Diode Low Frequency Metal-Oxide-Semiconductor-Field-Effect-Tr Multi-channel Television Sound National Association of Broadcasters National Electric Code National Television Systems Committee On Screen Display Printed Circuit Board Phase-Locked Loop Pulse Width Modulation Quadrature Intermediate Frequency Right Resistor & Capacitor Radio Frequency Red-Y Second Audio Program Surface Acoustic Wave(Filter) Sound Intermediate Frequency Switching Mode Power Supply Signal/Noise Switch Test Point Transistor Transistor Logic Television Ultra High Frequency Underwriters Laboratories Ultraviolet Variable-Capacitance Diode Voltage Controlled Oscillator Voltage Controlled Crystal Oscillator Very High Frequency Video Intermediate Frequency Variable Resistor Video Tape Recorder Vacuum Tube Voltmeter Transistor

IC507 EL4583CN (OPTION) IC665 TDA7265 IC904 KS24C04

ICP02 MC14528BCP (OPTION) ICS801 TNY253P ICS802 PC123

IC601 TDA7429S

IC602 KA4558

IC905 PCF8574P

ICV01 TA8851BN

ICV02,ICV03 HCF4053BE

ICP01 TDA8601

ICP02 TDA9160A

ICP03 SDA9288X

IC101 TDA9850

IC101 LA7565B

IC471 TL494CN

IC491 74HC123P

ICZ104,ICZ103 STK392-040

IC301 LA7845

IC801 STR-F6656

IC802 SVD001

IC804 SE110N

IC806 PS2561

IC501,IC531,IC561 TDA6111Q

IC01 UPD6488 IC02 UPC1862GS IC03 5412222

4 5

Block NameNo. IC Location IC Name

Table 2 - 3 IC Line - Up

Reference Information

Samsung Electronics 2-3

2-2 IC Line Up

MAIN

TERMINAL BOARD

PIP

MTS MODULE IF MODULE

HV MODULE

CONVERGENCE

SUB

CRT

3D-COMB

Reference Information

2-4 Samsung Electronics

Block NameNo. IC Location IC Name

Table 2 - 3 IC Line - Up (Continued)

FORMAT-CONVERTER

PROSCAN

3D-PHONIC

IC01 FS310KBC IC02 72V161621 IC03 Z9021106PSC

IC04 24C02 IC201 CIP3250A IC202 VPC3215C IC203 7705 IC204 SDS9280 IC206 SDA9272

IC207,IC208 9253

IC209 SDA9361 IC212 74F125 ICV02 CXA2011Q ICY03 CXA1839Q ICY17 74HCT221

ICD101 TL062CDT ICD102 SAA7367 ICD103 TMS57052 ICD104 LC32464M ICD105 Z9021106PSC

ICD106, ICD107 PCM1717E

ICD108,ICD109,ICD110,ICD111 TL062CDT

Reference Information

Samsung Electronics 2-5

2-3 MICOM IIC BUS LINE -UP

Z 9 0 3 7

SERIAL BUS

3D-PHONIC

MODULE

SDA9272

SLAVE ADDR.: B8h

VPC3215C

SLAVE ADDR.: 8eh

IIC 2 BUS

CXA2011Q

SLAVE ADDR.: 84h

CXA1839Q

SLAVE ADDR.: 8ah

SDA9280

SLAVE ADDR.: 2ch

CIP3250A

SLAVE ADDR.: Dch

SDA9361

SLAVE ADDR.: 8ch

IIC 1 BUS

UPD6488

SLAVE ADDR.: B8h

TDA9850

SLAVE ADDR.: B4h

XLS24C02

SLAVE ADDR.: A0h

TDA9160

SLAVE ADDR.: 8eh

SDA9288X

SLAVE ADDR.: D6h

PCF8574P

SLAVE ADDR.: 40h

PCF8574P

SLAVE ADDR.: 42h

TECC1070PG30A

SLAVE ADDR.: C0h

TCPN9082PC27A

SLAVE ADDR.: C6h

#30 : SDA 1

#12 : SDA 2 #11 : SCL 2

TA8851AN

SLAVE ADDR.: 90h

TDA7429S

SLAVE ADDR.: 80h

PCF8574P

SLAVE ADDR.: 40h

IIC 3 BUS

# 47 : SDA 3 # 48 : SCL 3

#31 : SCL 1

I C O

(

2-6 Samsung Electronics

MEMO

Specifications

Samsung Electronics 3-1

3. Specifications

Broadcasting System Scanning System

Tuning Range

Antenna Impedance

Intermediate Frequency

Sound Output

Rated Voltage

W/B Coordinates

High Voltage

FUSE

Power Consumption

NTSC Progressive Scanning VHF : CH2 ~ CH13 UHF : CH14 ~ CH69 Cable : CH1, CH14 ~ 125 75 ohm Unbalanced Video : 45.75 MHz Sound : 42.25 MHz Chrominance Subcarrier : 42.17 MHz STD : 15W FULL MAX : 20W 120V / 60 Hz Hx : 292 Hy : 260 Y : 14.5 Lx : 293 Ly : 263 Y : 0.23 31KV 250V/6.3A CODE NO : 3601-000300 285W

Alignment and Adjustments

Samsung Electronics 4-1

4. Alignment and Adjustments

4-1 When entering the service mode:

1. Turn on the TV, and then select ÒSTANDARDÓon the picture adjustment mode.

2. Turn off the TV (STAND-BY).

3. Enter the service mode by pressing the remote control keys in the following sequence : MUTE ®1®8®2®Power On

Note : If necessary, re-do steps 1~3.

Initial display when the service mode is switched.

SERVICE NORMAL 480P

GEOMETRICS PICTURE PICTURE2 SOUND PIP OPTION READ RESET

1. When a RF signal is received

SERVICE NORMAL 1080i

GEOMETRICS PICTURE PICTURE2 SOUND PIP OPTION READ RESET

2. When a DTV signal is received

Alignment and Adjustments

4-2 Samsung Electronics

MAIN MENU

ZOOM COMPRESS FREEZE SET UP RESET EXIT

3. When the PC mode is switched

MAIN MENU MENU DISPLAY

CH UP/DOWN Select item by moving cursor

VOL UP/DOWN Decrease or increase the adjustment values

4. Service Mode Control Keys

Note : The PC mode can be switched to the service mode by pressing the F.Mode Key (only on the factory remote control).

Alignment and Adjustments

Samsung Electronics 4-3

GEOMETRIC

VS V-SHIFT 132 HEH H-EHT 0 VA V-SIZE 47 HS H-SHIFT 95 VL V-LINE 114 VAN V-ANGLE 131 VSC V-S-CORR 104 VBO V-BOW 128 VE V-EHT 0 HSP H-SYC-PH 143 HA H-SIZE 102 VS4 VSHIFT480 150 PPH PIN-PHS 100 VA4 VSIZE480 20 PAM PIN-AMP 100 HS4 HSHIFT480 73 UPC UP-CORR 128 HA4 HSIZE480 102 LOC LO-CORR 128 HP4 HSP480 133

PICTURE

DRI DRIVE-L 32 RCT R-CUT OFF 8 SBR SUB-BRT 11 GCT G-CUT OFF 8 RDR R-DRIVE 32 BCT B-CUT OFF 8 GDR G-DRIVE 32 GAM GAMMA 12 BDR B-DRIVE 32 ABL P-ABL 15

PICTURE2

SHU SUB-HUE 6 R2L RGB-2L 8 SBR SUB-BRT 7 SHP SUB-SHP 2 R-R - 2 SF0 SHP-FO 2 R-B - 8 POV PRE-OVER 3 G-R - 9 NRL NR-LBL 1 G-B - 10 DCT DC-TRAN 3 CN1 SUB-CT1 8 D-N D-NAMIC 2 CR1 SUB-CR1 8 CEC CEC-LBL 3 CN2 SUB-CT2 12 VML VM-LBL 1 CR2 SUB-SR2 4 ABL ABL-LBL 2 R1L RGB-1L 8

SOUND

STEREO - 7 ALIGN1 - 10 SAP - 7 ALIGN2 - 0 LEVEL - 14 ALIGN3 - 0

PIP

CONTRAST - 7 POS-HOR - 61 POS-VER - 34

OPTION

BYTE O : - 10 BYTE 1 : - 00

NORMAL 480P

ITEM

FUNCTION INITIAL VALUE

ITEM

FUNCTION INITIAL VALUE

Alignment and Adjustments

4-4 Samsung Electronics

GEOMETRIC

VS V-SHIFT 128 HEH H-EHT 0 VA V-SIZE 65 HS H-SHIFT 87 VL V-LINE 114 VAN V-ANGLE 131 VSC V-S-CORR 104 VBO V-BOW 128 VE V-EHT 0 HSP H-SYC-PH 141 HA H-SIZE 134 VS4 VSHIFT480 150 PPH PIN-PHS 100 VA4 VSIZE480 20 PAM PIN-AMP 100 HS4 HSHIFT480 73 UPC UP-CORR 128 HA4 HSIZE480 102 LOC LO-CORR 128 HP4 HSP480 133

PICTURE

DRI DRIVE-L 32 RCT R-CUT OFF 8 SBR SUB-BRT 11 GCT G-CUT OFF 8 RDR R-DRIVE 32 BCT B-CUT OFF 8 GDR G-DRIVE 32 GAM GAMMA 12 BDR B-DRIVE 32 ABL P-ABL 15

PICTURE2

SHU SUB-HUE 6 R2L RGB-2L 8 SBR SUB-BRT 7 SHP SUB-SHP 2 R-R - 2 SF0 SHP-FO 2 R-B - 7 POV PRE-OVER 3 G-R - 8 NRL NR-LBL 1 G-B - 11 DCT DC-TRAN 3 CN1 SUB-CT1 8 D-N D-NAMIC 2 CR1 SUB-CR1 8 CEC CEC-LBL 3 CN2 SUB-CT2 14 VML VM-LBL 1 CR2 SUB-SR2 6 ABL ABL-LBL 2 R1L RGB-1L 8

SOUND

STEREO - 7 ALIGN1 - 10 SAP - 7 ALIGN2 - 0 LEVEL - 14 ALIGN3 - 0

PIP

CONTRAST - 7 POS-HOR - 61 POS-VER - 34

OPTION

BYTE O : - 10 BYTE 1 : - 00

SERVICE 1080i

ITEM

FUNCTION INITIAL VALUE

ITEM

FUNCTION INITIAL VALUE

Alignment and Adjustments

Samsung Electronics 4-5

4-2 Screen Change (When adjusting I2C Bus Geometric items)

PIN PHASE

10 V BOW

5 V ANGLE

PIN AMP

2 V LINEARITY

6 V SIZE

3 H SIZE

9 H SHIFT

7 V - S - CORRECTION

1 V SHIFT

Alignment and Adjustments

4-6 Samsung Electronics

4-3 Beam Alignment

PRECAUTION

1. Input a crosshatch and dot pattern.

2. Select the ÒSTANDARDÓ video mode.

3. Warm up the TV for at least 10 minutes.

4. Connect an audio oscillator to the pin jig between GT401~GT402 (located on the deflection PCB) and GND.

5. Determine the ZERO-magnet area (using the beam-alignment CY)

6. Check the squarewave at the point where the focus is misaligned (Use an audio oscillator).

ADJUSTMENT

1. Cover the Red and Blue lenses.

2. Adjust the Green lens as shown in the figures below

3. Adjust the G-Focus until any light around the core disappears.

4. Cover the Green and Blue lenses.

5. Adjust the Red lens using the same method as with the Green lens.

6. Note: The Blue lens is not adjusted because its focus varies little (VM-coil is installed).

7. After the adjustments are completed, disconnect the jig pin connector.

(Creation of CPM Zero Magnet)

(Creation of the 2-pole/4-pole zero magnets)

G-FOCUS

CORE

(Varying G-Focus Pack)

Varying the 2-pole of VM

(Positioning the Core in the Center)

Varying the 4-pole of VM

CORE

G-FOCUS

(When VM 2-Pole Adjustment is completed)

(Adjust until the light around the core becomes a circle)

Alignment and Adjustments

Samsung Electronics 4-7

4-4 Other Adjustments

4-4-1 Screen Adjustment

1. Warm up the TV for at least 30 minutes.

2. Turn to the Video Mode (No Signal) using a remote-control.

3. Connect an oscilloscope to RK,GK,BK.

4. Adjust the VR (VR501, VR531, VR561) screen so that RK, GK, BK pulse is 20Vp-p each. (Turn the R,G,B VR screen fully counterclockwise in the area of each flyback line.)

4-4-2 White Balance Adjustment

1. Select the ÒSTANDARDÓ video mode.

2. Input 100% white pattern.

3. In the stand-by mode, press the remote-control keys in the following sequence: Mute ® 1 ® 8 ® 2 ® Power ON

4. Warm up the TV for at least 30 minutes.

5. Input a 10-step signal.

6. R-cut off, B-cut off, and G-cut off by pressing the Volume +/- keys.

7. Adjust the low light with viewing the dark side of the screen.

8. Select R-drive, G-drive, and B-drive by pressing the Volume +/- keys.

9. Adjust the high light with viewing the light side of the screen.

10. If necessary, redo adjustments 6~9.

11. Press the Menu key to exit.

4-4-3 Sub-Brightness Adjustment

1. Input a sub-brightness adjustment signal. (TOSHIBA PATTERN)

2. In the stand-by mode, press the remote-control keys in the following sequence : Mute - 1 - 8 - 2 - Power ON

3. Select SBT by pressing the Volume +/- keys.

4. Adjust so that the 7th step on the right side of the screen is not seen (Use the Volume +/keys).

5. Press the Menu key to exit.

4-4-4 High Voltage (31KV) Check

PRECAUTION

1. Input a lion head pattern.

2. Select ÒSTANDARDÓ video mode.

3. Warm up the TV for at least 10 minutes.

4. Use a 1000:1 probe.

ADJUSTMENT

1. Connect the (+) terminal of the 1000:1 probe to the high voltage distributor and the (-) terminal to GND (located on the deflection board).

2. Adjust VR471 (located on the deflection board) so that the digital meter indicates

DC 31V ± 0.1V.

Alignment and Adjustments

4-8 Samsung Electronics

4-4-5 F.S. (Fail Safe) Circuit Check

Note : The F.S. Circuit check must be performed

after servicing.

1. Turn on the TV.

2. Select the ÒSTANDARDÓ video mode.

3. Short GT18, GT17 (located on the Convergence PCB). Then, both sound and picture disappear. (Note: Even if the shorted terminals are removed, both sound and picture do not appear. This proves the F.S. circuit is working. )

4. To restore both sound and picture, turn off the TV and reset it after about 30 seconds.

4-4-6 Static Focus Adjustment

PRECAUTION

1. Select the ÒSTANDARDÓ video mode.

2. Input a crosshatch pattern.

3. Cover the lenses that are not being adjusted.

4. Connect a convergence jig and read data.

5. Adjust the lens for best focus. (See Fig, 4-1, next page)

STATIC FOCUS (CONTINUED)

Vary the focus pack VR (Red, Blue) on the front cabinet. Adjust the TV for best possible focus around the center of the crosshatch pattern, without losing overall screen balance. Figure Crosshatch Pattern Examine these points together.

4-4-7 Lens Focus Adjustment

PRECAUTIONS

1. Do this adjustment after the static focus adjustment and the tilt adjustment.

2. Select the ÒSTANDARDÓ video mode. (Contrast:64, Brightness:32)

3. Input a crosshatch pattern.

ADJUSTMENT

1. Loosen the lens screws.

2. Cover the two lenses that are not being adjusted.

3. Adjust the lens, observing the color aberration vertically and horizontally within 3 blocks of the center of the crosshatch pattern.

4. When the lens is turned clockwise, the color aberration will change as follows:

Lens Color Aberration Change R Orange - Crimson G Blue - Red B Purple - Green

5. Green lens adjustment: Set the lens at the point where Blue just changes to Red. If the color aberration is irregular throughout the picture screen, adjust the lens to show Red color aberration (approximately 1~3 mm area) within a 3-block grid around the horizontal center-line. If the color aberration is irregular, adjust the lens as shown in the diagram below. (Accurate alignment of Green is important for overall color quality.)

6. Red lens adjustment Set the Red lens at the point where Orange becomes Crimson.

7. Blue lens adjustment Set the Blue lens at the point where Purple becomes Green.

RED ABERRATION

BLUE ABERRATION

L1, L2 < P

Fig. 4-1 Crosshatch Pattern.

Fig. 4-2 Color Aberration

Examine these points together

Alignment and Adjustments

Samsung Electronics 4-9

4-4-8 Horizontal Dynamic Focus Adjustment

PRECAUTION

1. Input a crosshatch pattern.

2. Select the ÒSTANDARDÓ video mode.

3. Warm up the set for at least 10 minutes.

ADJUSTMENT

1. Cover the Red and Blue lenses.

2. Adjust VR491 (located on the convergence PCB, H-Parabola).

3. Balance the left and right sides of the dynamic focus lines.

4-5 Screen-Jig

Center Point

146.5

235

146.5

235

270

270 270

270

111.7

176.5

111.7

: NORMAL : DTV (1080i)

Alignment and Adjustments

4-10 Samsung Electronics

4-5 Remote Control for Servicing (Convergence Mode)

Fine Adjustment Button

Factory Data Select Button

Last Data Save Button Half Adjustment Button

G-Mute B-Mute Convergence Pattern

Move Button

H/V Direction Select Button

Save Button

Line Shift

R-Select

R-Mute

Exit Button

Move Course Reverse

Move Course Forward

G-Select B-Select

Convergence Picture

Move Button

Test/Noraml

Convergence data Increase, decrease button

Convergence Data Zero Button

Alignment and Adjustments

Samsung Electronics 4-11

4-5-1 KEY Function

1. R-SELECT Press to select RED color.

2. G-SELECT Press to select GREEN color.

3. B-SELECT Press to select BLUE color.

4. R-MUTE Press to mute RED color.

5. G-MUTE Press to mute GREEN color.

6. B-MUTE Press to mute BLUE color.

7. CANCEL KEY Press to revert to the previous data during the Convergence Adjustment.

8. FINE/COARSE SELECT BUTTON Press for minor adjustment. If the width of the big-adjustment step is 1, then the width of the minor adjustment step is 0.5.

9. TEST/NORMAL

Press to check TV mode in the Convergence Mode.

10. LINE SHIFT Press to move a line up/down or left/right.

11. FACTORY DATA SELECT BUTTON Press to call the factory default values.

Alignment and Adjustments

4-12 Samsung Electronics

12. H/V DIRECTION SELECT BUTTON Press to switch the cursor direction horizontally or vertically.

13. SAVE BUTTON After the Convergence Adjustments are completed, press to save data.

14. EXIT BUTTON After the Convergence adjustments are completed, press to exit to TV mode.

15. MOVE CURSOR FORWARD Press to move the cursor right or down.

16. MOVE CURSOR REVERSE Press to move the cursor left or up.

17. CONVERGENCE PICTURE MOVE BUTTON

18. CONVERGENCE PATTERN MOVE BUTTON Press to move the convergence pattern left ( ) or right ( ) .

19. CONVERGENCE DATA ZERO BUTTON Press to zero the convergence correction data.

20. HALF ADJUSTMENT BUTTON After big adjustments are made, press for improvement of minor adjustment.

Alignment and Adjustments

Samsung Electronics 4-13

1. Warm up the TV for at least 30 minutes.

2. Input an NTSC Signal. (Use an antenna or AV source.)

Make sure that both deflection and convergence yokes are

properly adjusted so that the center of Green, Red, Blue pattern

is aligned on the center of screen jig.

3. Enter the Convergence Mode by pressing the remote control keys in the following sequence:

If OSD is displayed as shown in figure below, press the key to exit.

Then, redo step 3 to enter the Convergence Mode.

After entering the Convergence Mode, Stand by for about five seconds before

doing the adjustments.

NOTE

4-6 Convergence Adjustment

Alignment and Adjustments

4-14 Samsung Electronics

4. To adjust GREEN, first press the and the keys, and then press the key.

5. The key moves the cursor right, and the key moves the cursor left.

Alignment and Adjustments

Samsung Electronics 4-15

6. The key moves the cursor horizontally or vertically. 



NOTE

When the key is pressed once again, the cursor moves horizontally.

Alignment and Adjustments

4-16 Samsung Electronics

7. Use the key for overall balance.

8. After the Line Shift is cancelled by pressing the key, use the Channel

and Volume keys (Up/Down) to make big adjustments.

9. After the green convergence adjustments are completed, press the key to

save the data (The minor adjustments can be done only when adjusting Red and Blue).

Alignment and Adjustments

Samsung Electronics 4-17

10. Superimpose the Red and Green colors by pressing the and

the keys.

11. To adjust RED, redo steps 5~8.

12. Use the key to make minor adjustments.

(Or the key can be used for minor adjustment.)

Cursor Movement (when making minor adjustments)

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