Table of Contents
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Flow Chart of Troubleshooting
7-1-3 Speaker, Receiver and Mic Checking
Insert Power
YES
Speaker is
OK?
YES
Receiver is
OK?
YES
MIC is OK?
YES
END
Check HEA501
pin45,46(Spk_R),
pin47,48(Spk_L)
NO
signal OK?
YES
Check SPK1, SPK2 pin1,2 on
LCD signal OK?
YES
R eplace Speaker
Check HEA501
pin 5, 7
NO
signal OK?
YES
R eplace receiver
Check CN201
pin20, 22
signal on?
NO
YES
Check KEY FPCB
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NO
NO
NO
Check mic path from
CN201 to U101 and it's
NO
neighboring circuits.
7-8
Check U205
and Speaker
Check LCD
FPCB
Check HEA501
and Receiver
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