Audio Faults - Nokia NSB-7 Series Service Manual

PAMS Technical Documentation

Audio faults

Earpiece doesn't work
and there isn't any
mechanical problem.
Check C291, C292, 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.
Check the R268, C276, C263,
R354, C200 and C262.
Issue 1 06/00
OK
OK
OK
ãNokia Mobile Phones Ltd.
Disassembly & Troubleshooting
Check R266, C268, C269,
L200 and V250
Change the COBBA N250
NSB-7
Page 31