DOWNLOAD LG 42LF2500 / 42LF2510 (CHASSIS:LD91A) Service Manual ↓ Size: 5.78 MB | Pages: 78 in PDF or view online for FREE

Model
42LF2500 42LF2510 (CHASSIS:LD91A)
Pages
78
Size
5.78 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
42lf2500-42lf2510-chassis-ld91a.pdf
Date
PREV: LG 42LF75 / 42LF76 (CHASSIS:LD75B) Service Manual

LG 42LF2500 / 42LF2510 (CHASSIS:LD91A) Service Manual ▷ View online

P800 Pin #7~#10
Voltage Level = 5V ?
P800 Pin #2
Voltage level = 5V ?
Check Power connector
OK ?
Replace Power Board
YES
NO
YES
P800 Pin #13, 14 = 12V  
P800 Pin #17, 18 = 24V ?
NO
Replace Power Board
YES
NO
Replace MAIN B’D Q801
MAIN B’D L803 = 3.3V ?
Replace MAIN B’D IC801
YES
NO
MAIN B’D L813 = 1.26V ?
Replace MAIN B’D IC805
YES
NO
MAIN B’D L805 = 3.3V ?
Replace MAIN B’D IC806
YES
NO
Check MAIN B’D X100 Clock
12MHz
Replace MAIN B’D IC100
YES
NO
Replace MAIN B’D IC102
NAND FLASH
YES
Replace MAIN B’D IC103
Serial Flash
NO
Replace MAIN B’D 
IC300, IC301 DDR2 Memory
NO
Replace MAIN B’D IC100
NO
Making 
Revision 
2009. 2 . 1
1/34
 LCD TV
Symptom
Power-Up Boot Fail
26~42LH2000
32~47LH3000/LH4000
Check Power connector
OK ?
Replace Power Board
NO
YES
Replace Power Board
NO
Replace MAIN B’D IC801
NO
Replace MAIN B’D IC805
NO
Replace MAIN B’D IC806
NO
Replace MAIN B’D IC100
NO
Replace MAIN B’D IC103
Serial Flash
NO
Replace MAIN B’D 
IC300, IC301 DDR2 Memory
NO
Replace MAIN B’D IC100
NO
Making 
Revision 
2009. 2 . 1
 LCD TV
Symptom
Power-Up Boot Fail
19~22LH2000
2/34
P801 Pin #5~#6
Voltage Level = 5V ?
YES
P801 Pin #1, 2 = 15V?
MAIN B’D L803 = 3.3V ?
YES
MAIN B’D L813 = 1.26V ?
YES
MAIN B’D L805 = 3.3V ?
YES
Check MAIN B’D X100 Clock
12MHz
YES
Replace MAIN B’D IC102
NAND FLASH
YES
P800 Pin #20
Voltage level = 2V 
Check Power connector
OK ?
Replace Power Board
YES
NO
YES
NO
YES
Replace MAIN B’D Q802
MAIN B’D L1300 = 12V ?
Replace MAIN B’D Q806
NO
Replace Main Board
YES
P800 Pin #13, 14 = 12V  
P800 Pin #17, 18 = 24V ?
Check LVDS Cable
OK ?
YES
Replace LVDS Cable
NO
Making 
Revision 
2009. 2 . 1
 LCD TV
Symptom
No OSD
26~42LH2000
32~47LH3000/LH4000
3/34
P801 Pin #9
Voltage level = 2V 
Check Power connector
OK ?
Replace Power Board
YES
NO
YES
NO
YES
Replace MAIN B’D Q802
MAIN B’D L1300 = 12V ?
Replace MAIN B’D Q806
NO
Replace Main Board
YES
P801 Pin #1, 2 = 15V?
Check LVDS Cable
OK ?
YES
Replace LVDS Cable
NO
Making 
Revision 
2009. 2 . 1
 LCD TV
Symptom
No OSD
19~22LH2000
4/34
Page of 78
Display

Click on the first or last page to see other 42LF2500 / 42LF2510 (CHASSIS:LD91A) service manuals if exist.

RANDOM: