Nokia 3390, 3390b, 3395 Servicehandbuch
PAMS Technical Documentation
Baseband Troubleshooting
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Headset earpiece doesn’t
work and there are no
mechanical problems
Check L401, R109, C101, C107.
Replace COBBA (N100).
OK
Headset microphone doesn’t
work and there are no
mechanical problems
R105 (XMICN line) towards
COBBA (N100)
= 2,1V
Check XMIC line to COBBA
(N100) : L400, R105, C100,
R102, C110
Check R105, R100, R101, V100
Replace COBBA (N100)
No
OK
Yes
R203 towards C205 is high when
the headset plug is inserted.
Check X200
No
Yes