PAMS Technical Documentation
Disassembly & Troubleshooting
NSB-7
Issue 1 06/00
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Nokia Mobile Phones Ltd.
Page 31
Audio faults
Earpiece doesn’t work
and there isn’t any
mechanical problem.
Check C291, C292, L272 and L271
OK
Change the COBBA N250
Microphone doesn’t work
and there isn’t any
mechanical problem.
Check the voltage in resistor Check R266, C268, C269,
R267 RF side head. Voltage L200 and V250
should be about 2.1V.
OK
Check the R268, C276, C263,
OK
Change the COBBA N250
R354, C200 and C262.