Nokia 8850 Manual Do Serviço
NSM–2
Disassembly & Troubleshooting Instructions
PAMS Technical Documentation
Page 19
Issue 1 12/1999
Nokia Mobile Phones Ltd.
Audio faults
earpiece doesn’t work
and there isn’t any
mechanical problem
and there isn’t any
mechanical problem
Check R 292, R291, L272 and L271
OK
Change the COBBA N250
Microphone doesn’t work
and there isn’t any
mechanical problem
and there isn’t any
mechanical problem
Check the voltage in resistor
R267 RF side head. Voltage should be
about 2.1V
R267 RF side head. Voltage should be
about 2.1V
Check the R268,C 274,C263,C278
and C262
and C262
Check R266, C268, L287 and V250
OK
OK
Change the COBBA N250