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3 4
43
IC401 Pin 23 input is
High Active?
All in/output values are
right?
IC401 Pin 45 and 46
inputs are right?
IC401 Pin 16 input is over
4.2V?
18. Micom Failure
19. OSD Failure
NO
NO
NO
NO
Done.
Change IC302
Check Q903,D908,ZD902
Check X401
Check and replace
R451,C408
Replace IC401.
YES
YES
YES
YES
- 31 -
IC401, #45
IC401, #46
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