4. TROUBLE SHOOTING
Open the Folder
Is SPK/RCV OK ?
No
Is SPK/RCV
well-soldered ?
Yes
Is FPCB/CN601 OK ?
Voltage at Pin9 of U701 is 2.8V ?
Voltage at Pin10 of U701 is 1.5V ?
Check
U704,C724,C725,U705
(Including Bypass ),
U702 ?
Replace U704,C724,
C725,U705,U702
Change the FPCB/CN601
Replace SPK/RCV
Replace U701
Replace DBB
Check the soldering
of R111, R113
Re-solder R111, R113
Replace U102
Yes
Yes
Yes
Yes
No
No
No
Yes
Yes
No
Re-solder SPK/RCV
No
RCV Problem
SPK Problem
27
Summary of Contents for C3600
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