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LCT TV

Service Manual


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Model No.: LCT-32HSSTP

Version: 1.0

MODEL:

LCT-32HSSTP


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Version: 1.0

CONTENTS

SAFE PRECAUTION........................................................ ............................................................ .......... 4

BLOCK DIAGRAM ....................................................... ............................................................... .......... 5

FUNCTION OF CONJUNCTION......................... ................................................................ .................. 6

SIGNAL DIAGRAM ........................................................ ............................................................. .......... 9

POWER DIAGRAM..................................... ................................................................ ......................... 10

TROUBLESHOOTING .................................................. ........................................................... ............ 11

WALL-MOUNTING BRACKET INSTALLATION GUIDE......................................... ....................... 14

CIRCUIT DIAGRAM................................................................ ............................................................ 17

PART LIST............. ........................................................... ........................................................... .......... 26


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Version: 1.0

SAFETY PRECAUTION

WARNING:

Service should not be attempted by anyone unfamiliar with the necessary precaution on this receiver.

The following are the necessary precautions to be observed before servicing this chassis.

1. When replacing a chassis in the cabinet, always be certain that all the protective devices are put

back in place, such as: non-metallic control knobs, insulating covers, shields, isolation

resistor-capacitor network etc.

2. When replacing parts or circuit boards, disconnect the power cord.

3. When replacing a high wattage resistor (oxide metal film resistor) on the circuit board, keep the

resistor 10mm (1/2in) away from circuit board.

4. Connection wires must be kept away from components with high voltage or high temperature.

5. If any fuse in this TV receiver is blown, replace it with the FUSE specified in the chassis parts list.

PRODUCT SAFETY NOTICE

Many electrical and mechanical parts in the chassis have special safety-related characteristics.

These characteristics are often passed unnoticed by a visual inspection.

Replacement parts, which have these special safety characteristics are identified in this manual and its

supplement electrical components having such features are shaded on the schematic diagram and the

parts list.

Before replacing any of these components, read the parts list in this manual carefully. The use of

substitute replacement parts which do not have the same characteristic as specified in the parts list may

create shock, fire or other hazards.


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BLOCK DIAGRAM

P40 CN801

CN904

CN902

MAIN BOARD

CN901

XP501 XP511

POWER BOARD

XP4

XP7 XP3

TUNNER BOARD

XP2

XP8

XP301

KEY BOARD

PANEL


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FUNCTION OF CONJUNCTION

CN801---XP501

ITEM NAME FUNCTION

1 5V FOR PANEL POWER

2 PS FOR POWER OFF

3 GND GND

4 14V FOR AUDIO POWER

5 PGND AUDIO GND

6 12V FOR MAIN POWER

7 12V FOR MAIN POWER

8 GND FOR MAIN GND

9 GND FOR MAIN GND

CN902---XP4

ITEM NAME FUNCTION

1 GND FOR AUDIO GND



4 GND FOR AUDIO GND


6 GND FOR AUDIO GND

7 5.0V TUNNER POWER

CN901---XP2

ITEM NAME FUNCTION

1 ADC1 FOR SCART1 AUTO IDENTIFY

2 ADC2 FOR SCART1 AUTO IDENTIFY

3 GND GND

4 MUTE AUDIO MUTE

5 RESET MSP3410 RESET

6 GND GND

7 SDA FOR SERIAL DATA

8 SCL FOR SERIAL CLOCK


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CN901---XP2

ITEM NAME FUNCTION

1 GND GND

2 CVBS FOR TV'S CVBS SIGNAL

3 GND GND

4 GREEN FOR SCART GREEN

5 GND GND

6 RED FOR SCART RED

7 GND GND

8 FB FOR FAST BLANK

9 GND GND

10 BLUE FOR SCART BLUE

11 GND GDN

12 AVOUT FOR MONITOR OUT

CN903---XP1

ITEM NAME FUNCTION

1 AV1-IN FOR VIDEO1 IN

2 GND GND

3 AV2-IN FOR VIDEO2 IN

4 GND GND

5 S-CIN FOR C-IN

6 GND GND


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P40

ITEM NAME FUNCTION

1 PWM PWM Dimming

2 APWM Analog PWM dimming

3 ON/OFF Backlight On~Off: 2.4-5.0V On

0-1V Off

4 GND

5 RX0- LVDS signal

6 RX0+ LVDS signal

7 GND

8 RX1- LVDS signal

9 RX1+ LVDS signal

10 GND

11 RX2- LVDS signal

12 RX2+ LVDS signal

13 GND

14 RCLK- LVDS clock signal

15 RCLK+ LVDS clock signal

16 GND

17 RX3- LVDS signal

18 RX3+ LVDS signal

19 GND

20 N.C.

21 N.C.

22 N.C.

23 GND

24 GND

25 GND

26 Panel_power Module power

27 Panel_power Module power28 Panel_power Module power

29 Panel_power Module power

30 Inverter_power Inverter logic power


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SIGNAL DIAGRAM

A1

TUNER

N1

MSP3410

N4

TDA7266B

N5

LM358

U400

VPC3230

U500

GM1501 PANEL

U702

PI5V330

SPEAKER

SPEAKER

EARPHONE

U703

SDA5550M

SCART1

SCART2

U401

DV1

VGA

YPBP


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POWER DIAGRAM

CN801

1

2

3

4

5

6

7

8

12V

U800

LM2576

9

GND

GND

PGND

U802

LM1086

U801

LT1117-3.3

U810

LT1117-3.3

U805

LT1117-2.5

14V

GND

+5V

U902

IRF7314

5V

U806

SW

1

2

3

4

5

6

7

GND

GND

GND

GND

120V

120V

120V

Panel_power

Inverter_logic_power

U901

LM7809

LCD

12V

N301

TDA7266B

N302

CD4052

N303

NJW1137

N304

LM358

14V

9V

U803

LT1117-1.8U500

GM1501

U400

VPC3230

U600

K4D263238

U903

AM29LV040

Main board


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TROUBLESHOOTING

NO PICTURE

CN801

PIN6:12V

FB703

PIN1:5V

U802

PIN2:3.3V

REPLACE

U802

REPLACE

POWER BOARD

U806

PIN56 7 8:5

REPLACE

U806

REPLACE

U800

REPLACE

U801ORU803ORU8

05OR810

U402

PIN5,6(5V)

PIN78 3.3V

REPLACE

U402

U801(3.3V) U803(1.8V)

U805(2.5V) U810(3.3V)

REPLACE

U402

OK

NO

YES

YES

NO

YES

YES

YES

FB400(5V)FB401(3.3)

FB402(5V)FB403(5V)FB

404 3.3V FB405 3.3

YES

NO

NO

NO

NO

NO

YES


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NO TELETEXT

U809(2.5V)REPLACE

U809

REPLACE

FB409FB410FB411FB412

FB409(3.3V)FB410

(2.5V)FB411(3.3V)

FB412 3.3V

REPLACEU703 U704 U706

YES

YES

YES

NO

NO


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NO SOUND

A1

PIN4

N1 PIN27,

PIN28

REPLACE

A1

REPLACE

N1

N4 PIN1, PIN2,

PIN4, PIN5

REPLACE

N4

OK

N4

PIN7(4.5)

CHECK

V3

V4

YES

YES

YES

YES

NO

NO

NO

NO


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WALL-MOUNTING BRACKET INSTALLATION GUIDE

READ CAREFULLY BEFORE INSTALLATION!

THE INSTALLATION GUIDE SHOULD BE RETAINED FOR FUTURE REFERENCE.

Caution:

1. Do NOT attempt to install the TV by yourself to avoid mistakes or hazard. Refer all installation to

qualified servicing personnel.

2. DO NOT install the TV on a wall aslope or a wall that makes the TV screen sloping over 25 off

plumb line. Otherwise, it may cause tumble or injury.

3. One must follow the instructions in this guide to correctly install the TV.

4. It requires more than one person to install the TV.

5. Before installation, examine whether the wall conforms to the specifications and whether the

supplied parts can be fixed on it. The wall for mounting should sustain the weight of TV and

speakers, e.g. cement wall or brick wall. DO NOT attempt to install an area with standard building

rigidity, which sustains the weight of the TV and speakers. If the rigidity of the wall can not be

measured, every mounting hole should sustain a frontal force over 75N,and a shearing force of

over150N.

6. Use the specified electric drill and drill bit for drilling. The drilling holes should conform to the

specifications.

7. To avoid fire and shock, do NOT place radiator, heater or humidifier below the installed TV.

8. The TV should be kept away from moisture, sensors and power line. The tv should be kept away

from impact and vibration.

9. Ensure that the power supply be disconnected before installation for fear of fire and shock.

Wall-mounting Installation Steps:

1. Take out the bracket form the package and check if there are serious defects (e.g. infirm juncture).

2. Adjust the bracket to the desired angle. Use bolt 7 to adjust the angle by meeting holes of column

beam2 and holes of lever 4.

3. Drill locating holes in the specified dimension in a vertical wall of concrete or brick. The hole size

should be 11mm. The hole depth should accommodate the expanding tube of the bolt.

4. Fix the bolts into the drilled holes in step3, and then cover each bolt with a metal washer. Meet the

four mounting holes in the bracket with the four bolts in the wall, cover each bolt with a metal

washer, then fasten with a screw nut. Check its rigidity by pulling the bracket.

5. Fix the fixture disk to the back cover of the TV using six M4x20 bolts.

6. Wall-mount the TV by putting the six-fixture disk into the six mountingholes A.


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Wall-mounting quick guide


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CIRCUIT DIAGRAM


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PART LIST

CODE DESRIPTION

103246 Digital board RSAG2.908.452

103247 Tuner board RSAG2.908.451

101814 Front control board RSAG2.908.337

101808 Switch board RSAG2.908.313

1011691 LCD panel LTA320W1-L02

1020374 Remote control HYDFSR-A026AK

1005288 Inverter connector SP030623770R1

1004899 Cable to panel SP0309108901004693 AC cord PHP-206+PHS-301

1013110 Speaker YD83E-10W8R-B

1013122 Speaker YDG50-10W8R-A

1020322 Uesr's manual IES040937

101227 Back cover WTG6.170.071

1020333 Front encloser RSAG8.074.096\W9+B2\SYN135

1020311 Rating label E/RSR8.807.1377

1020323 Carton box E/RSR8.865.1511

1019700 Signal cord SCART-S-2.0


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