LG LX-D2560A Service Manual page 16

I IC103 KS4CD21CS CHECK
Check IC100 78KOKF2
22,24 PIN
YES
22 PIN DATA 22 PIN CLK
YES
OK
I FLD DISPLAY CHECK
Check P7904 1,2,3 power.
YES
F1+,F2- both terminals: over
3.7V Check power VKK: over
26V.
YES
Check P7302 connection
condition and power F1+,F2-
both terminals: over 3.7V
Check power VKK: over 26V
Check 25 PIN:5.6V
YES
Check IC301 PT6324
power 50 PIN VKK:-26V
9.52 PIN +5V
YES
NO
Check MICOM power 5V
YES
Check the related part
YES
OK
NO
Refer to SMPS
Troubleshooting
NO
Check P7302 assembly
YES
Check power of each PIN
YES
OK
- 3-3 -
NO
NO
Replace the related parts
NO
Replace the related part
Refer to MICOM
Troubleshooting