Read LG 47LF11 (CHASSIS:LA92G) Service Manual online
- 25 -
C
2009
11. No Video(for 42/47LH40-UA)
Check 12V DC Voltage
- L1300
NO
Check Q706
- pin4 2V DC voltage
NO
Check PANEL_CTRL
- LOW(0V)
OK
OK
OK
Replace Q706
Check Q704/Q705
Check 3.3V/16V/26V DC Voltage
-R1447,R1446,R1450
NO
Replace IC1300
or Main borad
OK
Check IC1301 pin 28(Vcom)
- about 7V
NO
Detach the P1400/P1401
FFC Cable
- Check Vcom
NO
Replace IC1301
OK
OK
Replace LCD Module
Check URSA2 mini-LVDS output
P1400, P1401
NO
Replace LCD Module
12. No Video(for 37LH40-UA)
Check 12V DC Voltage
- L1300
NO
Check Q706
- pin4 2V DC voltage
NO
Check PANEL_CTRL
- LOW(0V)
OK
OK
OK
Replace Q706
Check Q704/Q705
Check 3.3V/16V/26V DC Voltage
-R1327,R1371,R1378
NO
Replace IC1300
or Main borad
OK
Check IC1301 pin 28(Vcom)
- about 7V
NO
Check IC1302
input / output
NO
Replace IC1302
OK
Detach the P1400/P1401
FFC Cable
- Check Vcom
OK
OK
Check URSA2 mini-LVDS output
P1400, P1401
NO
Replace LCD Module
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