Audio Faults 1 - Nokia RH-37 Series Baseband Troubleshooting Instructions

RH-37
6(a) - BB Troubleshooting Instructions

Audio faults 1

Audio
faults
Is HP
earpiece
working?
Yes
Audio
faults 2
Page 18
Try
changing earpiece.
No
Is it working
now?
No
Set phone in LOCAL
mode.
Use Phoenix Audio
Test.
Set EXT IN, HP OUT,
LOOP ON
Measure
DC offset
voltagefrom Earpiece
pads. is it ~1.38V
to GND?
Yes
Measure
MICB2voltage
from XMICP
pads. Is it ~2.2V
Yes
Earpiece
Nokia Corporation
Nokia Customer Care
Check L2150,
R2151, C2179
and line.
No
If OK change
UEM.
No
Retest
Audio
faults3
Yes
Issue 1 07/04