DOWNLOAD LG 42LD450 / 42LD451C / 10526Y (CHASSIS:LA01B) Service Manual ↓ Size: 6.65 MB | Pages: 72 in PDF or view online for FREE

THE    SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS 
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE    SYMBOL MARK OF THE SCHEMETIC.

CHB_CVBS_IN

/PIF_SPI_CS

R6001

0

NON CHB

Ver. 1.0

GP2_Saturn7M

68

Check stand-by Voltage.

P403 9~12pin : +3.5V_ST

Check Power connector

Main B/D 3.5V Line

Short Check

Check X1002 clock

32 KHz

Replace X1002

Check P404 PWR_ON.

1pin : 3.3V

Replace Micom(IC1002) or Main board

Check Multi Voltage

P404 2 pin : *20V , 17 pin : 12V

Replace Power Board

Check Inverter Control & Error Out

P404 18 pin : High

P404 *24 pin : low

Check Power Board or Module

Check IC402/3/5/7 Output Voltage

IC402 : 2.5V

IC403 : 1.26V

IC405 : 3.3V
IC407 : 1.5V

Replace IC402/ 3 / 5 / 7

Re-download Micom software.

Check Micom Voltage
IC1002 pin 48 : +3.5V

Replace L404

*20V Voltage is dependent on Model
32LD450 => 24V

Check LVDS Power Voltage

Q409 : 12V

Replace Q409

Check Mstar LVDS Output

Replace Mstar(IC101) or Main Board

Change Module

*24 Pin is dependent on Model
32LD450 => 20 pin 

Check X201 Clock

24 MHz

Replace X201

Replace Power board.

Check RF Cable & Signal

Check Tuner 3.3V Power

L5003

Replace L5003

Check Tuner 1.2V Power 

IC5001 2 pin : 1.2V

Check IF_P/N Signal

TU5001 17/18 Pin

Replace IC5001.

Check Tuner 5V Power

L5002

Check IC401

Check Mstar LVDS Output

Replace Mstar(IC101) or Main Board.

Replace IC401

Bad Tuner. Replace Tuner.

Replace L5002