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Flow Chart of Troubleshooting
3-12
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3-1-5. Receiver Part
3-1-6. Speaker Part
There is no sound from the Receiver
Is the terminal of
Receiver O.K ?
No
Replace the Receiver
Yes
No
Yes
Check
UCP101,R122,123
Is there any signals at the
pin# P11 and pin#N12 of
UCP101 ?
END
①
Yes
Is there any signals at the
pin# 3 and pin# 9 of
UCP104 ?
Check
U104
No
Yes
②
There is no sound from the Speaker
Is the terminal of Speaker
O.K ?
Replace the Speaker
Is there any signals at the
pin#17 and pin#18 of U106 ?
END
Yes
Yes
Yes
No
No
Check
UCP106,R116,R119
Is there any signals at the
pin# 3 and pin# 9 of
UCP104 ?
Check
U104
No
Yes
③
④
