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Flow Chart of Troubleshooting
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7-11
7. Receiver Part
U404 pin 2,10 = 2.8V?
Resolder or replace U404
END
No
Yes
Yes
Receiver does not work
Is Receiver working?
Replace the Receiver
No
Yes
No
Resolder or replace C471, C475
Yes
Check the soldering of the
spaeaker wire
No
Modufy the speaker wire soldering
Yes
C471, C475 = 1.2V?