LG FLATRONez T730SH Service Manual page 31

IC401 Pin 16 input is over
IC401 Pin 45 and 46
3 4
inputs are right?
IC401 Pin 23 input is
High Active?
All in/output values are
Waveforms
3
IC401, #45
Change IC302
18. Micom Failure
4.2V?
YES
YES
YES
right?
YES
Done.
4
19. OSD Failure
NO
Check Q903,D908,ZD902
NO
NO
Check and replace
R451,C408
NO
IC401, #46
- 31 -
Check X401
Replace IC401.