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Turner abnormal(For main board)
Auto search abnormal
Is 13pin of U101 9V?
YES
Is X101 oscillating?
YES
Is 12pin of U101 9V at FM
mode and 0V at AM mode?
YES
Normal
Autosearch normal
but audio abnormal
YES
Is 3,4,29,30pin of
U503 normal?
YES
Normal
RDS abnormal
YES
Normal
All manuals and user guides at all-guides.com
NO
NO
NO
NO
NO
NO
Check P9V, if P9V is 9V,check Q110 Q115
and peripheral components.
If P9V is 0V, check according to main board
power schematic
Check Tc9257 X101 and peripheral components
Check 17pin of Tc9257 Q103 Q108 and
peripheral components
Check connection between 16,17pin of U101
and U503
Replace U503
Check U707 and peripheral components
14
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