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Flow Chart of Troubleshooting
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7-15
8. Receiver Part
U202 pin 1,5 = 1.5V?
Resolder R219,R220
END
No
Yes
Yes
Receiver does not work
SPK +,- PAD = 1.5V?
Change the SUB board
No
Yes
Is Receiver working?
Replace the Receiver
No
Yes
No
Resolder or replace U202
Yes
No
Resolder CN502
CN502 pin 48, 50= 1.5V?
Yes
CN502 pin 2 ,4= 1.5V?
No
Change the board to board
FPCB
Yes
Check the soldering of the
spaeaker wire
No
Modify the speaker wire soldering
Yes
U202 pin 9,13 = 1.5V?