Audio Faults; Earpiece - Nokia RH-27 Series Technical Documentation Manual

RH-27
Troubleshooting - Baseband

Audio faults

Earpiece

Audio
faults
Is the earpiece
working?
YES
Audio
faults,
page 2
Page 48
Change earpiece. Is
NO
it working now?
Set phone in Local Mode. Use
Phoenix "Baseband Audio
Control" and set the following:
Enable Tx, Enable Rx, Select
MIC2 (0dB), Enable earpiece,
and enable digital loopback
only. Inject a 1KHz sine signal
20mVp-p on XMIC.
Is the signal coming
out of the UEM on
EARP and EARN?
©2003 Nokia Corporation
CCS Technical Documentation
YES
NO
NO
YES
Confidential
Retest
Check L102, C152, C156,
C151, C154, C153, C170,
R151, R155, R152, R150,
and R153. If OK, change
the UEM.
Check R177, R178,
and R179. If OK,
then change the
earpiece.
Issue 1 11/2003