Table of Contents
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Troubleshooting flow
Only noise is audible?
Connect headset to
phone jack J1001 and
listen to FM signal
Go to Headset
troubleshooting
Check Vph=3.4~4.2V at
C1602, C1603
OK
Check Vreg_MSMP=2.6V
Replace U1601
Page 4-22
FM Fault
YES
YES
No
OK
NOK
NOK
NOK
OK
NOK
at C1604
OK
OK
END
Company Confidential
Copyright © 2008 Nokia. All rights reserved.
Check the soldering
points of C1601, B1004,
C1025, C1017, C1018 and
replace them
No Fault
Go to general
power supply
troubleshooting
NOK
RF Troubleshooting
OK
IS FM radio function OK?
NO
OK
RM-376
YES
Issue1
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Table of Contents
Troubleshooting
