LG 42LH200H (CHASSIS:LD91Y) Service Manual ▷ View online
Check MAIN B’D
JK405 Pin #1 5V ?
NO
Check MAIN B’D
R848 12V ?
Check that the USB Memory & HDD are supported by Spec
(Refer to User Manual’s USB cautions)
YES
Check MAIN B’D
R801 5V ?
Replace MAIN B’D IC402
YES
NO
Replace MAIN B’D IC808
YES
YES
Replace MAIN B’D IC 100
Check MAIN B’D
JK405 OK ?
YES
NO
Replace MAIN B’D JK405
Making
Revision
2009. 2 . 1
LCD TV
Symptom
USB No Connect Problem
22~42LH200H
Check IR B’D P1 Wafer
& Connector
Check MAIN B’D P1305
Wafer & Connector
YES
NO
Replace it
YES
Replace IR B’D
Making
Revision
2009. 2 . 1
LCD TV
Symptom
Remote Control Problem
26~42LH200H
Check IR B’D P1 Wafer
& Connector
Check MAIN B’D P1305
Wafer & Connector
YES
NO
Replace MAIN B’D IC100
IR B’D IC1 Pin #3
Voltage 4V ↑ ?
NO
NO
Replace it
YES
Replace IR B’D IC1
NO
Replace MAIN B’D IC100
Making
Revision
2009. 2 . 1
LCD TV
Symptom
Remote Control Problem
22LH200H
Making
Revision
2009. 2 . 1
LCD TV
Symptom
Clock display Problem
Check the clock cable
Check the “Clock Display” item
on SVC Menu
YES
NO
Replace it
Check the “Time” item
on user Menu
YES
NO
Replace the “Clock display” item
from No to Yes .
NO
Check the current time establishment
on “Time” item of user menu.
Re-solder or replace the defect part.
Replace the front clock assy
Check I2C line & output
of IC1400,1404
Check the front clock assy
Replace MAIN B’D IC 100
NO
NO
YES
YES
YES
- Direct user setting
22~42LH200H
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