Audio Faults - Nokia NSM-2 Series Disassembly & Troubleshooting Instructions

PAMS Technical Documentation

Audio faults

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