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Flow Chart of Troubleshooting
8. Receiver Part
Receiver does not work
U604 pin 7,8 = 1.5V?
U604 pin 7,8 = 1.5V?
CN700 pin 23, 25= 1.5V?
SPK +,- PAD = 1.5V?
Check the soldering of the
spaeaker wire
Is Receiver working?
Yes
Yes
Yes
Yes
Yes
Yes
Yes
END
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No
Resolder U200 or change PBA
No
Resolder or replace U604
No
No
Change the LCD Module
No
Modify the speaker wire soldering
No
Replace the Speaker
7-18
change U200
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