LG LM-U360 Service Manual page 14

I AUX FUNCTION
Check whether JK800
contacts or not
YES
IC200
(BU4052)4,11PI
N input waveform check
YES
IC200
(BU4052)3,13PIN output
waveform check
YES
IC801 (MC4580) 3, 5 PIN
input waveform check
YES
IC801(MC4580) Pins 1, 7
output check
YES
IC603(CS5340) Pins10, 12
input check
NO
YES
normal
NO
IC200 (BU4052)16PINVDD,
8PIN VSS power check
YES
relevant parts
replacement
NO
IC801 (MC4580)4PIN
VSS,8PIN VDD power check
YES
relevant parts
replacement
IC603 Pin4 SDout check
NO
YES
Relevant Part repplacement
- 2-7 -
NO
µ-COM (IC100) 3, 6PIN
Communication check
Refer to SMPS
NO
Troubleshooting
IC603 Pins2, 7, 8 check