LG 42LF2500 / 42LF2510 (CHASSIS:LD91A) 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
31/34
LCD TV
Symptom
USB No Connect Problem
32~47LH4000
Check IR B’D P1 Wafer
& Connector
Check MAIN B’D P1304
Wafer & Connector
YES
NO
Replace it
YES
Replace IR B’D
Making
Revision
2009. 2 . 1
32/34
LCD TV
Symptom
Remote Control Problem
26~42LH2000
32~47LH3000/LH4000
32~47LH3000/LH4000
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
33/34
LCD TV
Symptom
Remote Control Problem
19~22LH2000
Check IR B’D P1 Wafer
& Connector
Check MAIN B’D P1304
Wafer & Connector
YES
YES
NO
Replace it
Replace IR B’D
Making
Revision
2009. 2 . 1
34/34
LCD TV
Symptom
Intelligent Sensor Problem
32~47LH4000
Click on the first or last page to see other 42LF2500 / 42LF2510 (CHASSIS:LD91A) service manuals if exist.