DOWNLOAD LG 32LD550 (CHASSIS:LA02B) Service Manual ↓ Size: 4.9 MB | Pages: 58 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.

09/10/xx

INDEX

100   100

GP2_BCM_ATSC

INDEX

SHEET 001

SHEET 002

SHEET 003

SHEET 004

SHEET 008

SHEET 007

SHEET 005

SHEET 006

SHEET 010

SHEET 009

SHEET 019

SHEET 020

SHEET 014

SHEET 013

SHEET 011

SHEET 015

SHEET 012

SHEET 018

SHEET 017

SHEET 016

SHEET 021

SHEET 025

SHEET 024

SHEET 026

SHEET 023

SHEET 029

SHEET 022

SHEET 027

SHEET 030

SHEET 028

LVDS_LE9500

BCM-LVDS/AUDIO

BLANK

BCM-VIDEO

CHB

USB/EAR-PHONE

COMOPNENT/AV REAR

BLANK

BLANK

BCM-POWER

SMD_GASKET

HDMI_POWER

BLANK

BLANK

AMP_SUB_NTP

BCM-BOOT/FLASH/GPIO

ATSC_TUNER

BLANK

LG_LOGO_LE9500

BLANK

BCM-DDR

Must be
included
in any PCB 

BLANK

BLANK

BLANK

BLANK

BLANK

BLANK

NECESSARY

SHEET 079

LED DRIVER WAFER

SHEET 098

RGB/SPDIF

LG5111 (L.D.) from URSA3

SHEET 099

SHEET 083

SHEET 093

MICOM

SHEET 089

URSA3-DDR/POWER

POWER

SHEET 087

SHEET 084

AMP_NTP7000

SHEET 091

SIDE_GENDER

SHEET 081

SHEET 092

IR/232C/EHTERNET

T-CON (NO L.D.)

SHEET 088

SHEET 094

LG5111 (L.D.) from BCM

URSA3 (NO L.D.)

SHEET 082

SIDE_AV

SHEET 085

T-CON (L.D.)

SHEET 095

SHEET 086

SHEET 096

URSA3 (L.D.)

SHEET 097

HDMI SWITCH

WIRELESS

SHEET 090

SHEET 080

MOTION REMOCON

NECESSARY

Must be
included
in any PCB 

BLANK

WITHOUT
LOCAL
DIMMING

WITH
LOCAL
DIMMING
T240Hz

NOT USE

SELECTABLE

SELECTABLE

SELECTABLE

SHEET 077

SHEET 078

LG5111 60HZ LVDS

SHEET 076

SHEET 075

LG5111 120HZ MINI-LVDS

URSA3 120HZ MINI-LVDS

SHEET 074

URSA3 120HZ LVDS

BCM 60HZ LVDS

BLANK

BLANK

LVDS WAFER
SELECT

BLANK

SIDE GENDER LINE

SHEET 031

SHEET 073

BLANK

WITH
LOCAL
DIMMING
T4800Hz

SELECTABLE

3D_IR_GENDER / POWER

1. Power-up boot check

Check stand-by Voltage.

P8000  9~12pin : +3.5V_ST

Check Power connector

Main B/D 3.5V Line

Short Check

Check X8101 clock

32 KHz

Replace X8101

Check P404 PWR_ON.

1pin : 3.3V

Replace Micom(IC8101 ) or Main board

Check Multi Voltage

P8000 2 pin : *20V , 17 pin : 12V

Replace Power Board

Check Inverter Control 

P8000 18 pin : High

Check Power Board or Module

Check IC402/3/5/7 Output Voltage

IC8001 : 1.2V

IC8003 :  1.8V
IC8004 :  2.5V

IC8005 : 3.3V

Replace IC8001/ 3 /4 / 5

Re-download Micom software.

Check Micom Voltage

IC8101  pin 48 : +3.5V

Replace L8003

*20V Voltage is dependent on Model
32/42/46LD550 , 47LD650 => 20V
52/60LD550 , 55LD650 => 24V

Check LVDS Power Voltage

Q8004 : 12V

Replace Q8004 

Check FRC(IC9001)LVDS Output

Replace FRC(IC9001)or Main Board

Change Module

ok

ok

ok

ok

ok

ok

ok

ok

ok

ok

No

No

No

No

No

No

No

No

OK

No

Check X1001 Clock

54 MHz

Replace X1001

ok

No

Replace Power board.

ok

Check IC402/3/5/7 Output Voltage

IC8903 : 3.3V
IC8001 : 1.5V

IC8902 :  1.2V

No

Replace IC8901/ 2/ 3

No

2. Digital TV Video

Check RF Cable & Signal

Check Tuner 3.3V Power

L701

Replace L701

Check Tuner 1.2V Power 

IC700  2pin : 1.26V

Check IF_P/N Signal

TU700 17/18 Pin

Replace IC700.

Check Tuner 5V Power

L700

Check IC8003

Check FRC and BCM LVDS Output

Replace Mstar(IC9001) or BCM( IC900)
or Main Board.

ok

ok

ok

ok

ok

No

No

No

No

No

Replace IC8003

No

Bad Tuner. Replace Tuner.

Replace L8007

ok