Nokia RH-6 Series Baseband Description & Troubleshooting page 62

RH-6 Company Confidential
6 - BB Description & Troubleshooting CCS Technical Documentation
IHF speaker failure
Audio Faults
4
Set Phoenix LOCAL
Try change
No
Is IHF speaker No m ode. Select Maintance -
speaker. Is it
working >audio test. Set Ext in
working now?
IHF/Ext out ON.
Yes
Yes
Measure DC volts on
No
speaker pads.Are they
~0.5VBat to GND?
Yes
Measure Shutdown
Check C155, C158,
voltage on R168. Is it
C162, R167, R164,
~1.8V
R165, R163,C161,
lines.
If ok change N150
Yes
No
Check C164,C165,L151,
Check R168, line. If ok
L152, C177, C178, Vbat.
chagne N150. If still fail,
End
If ok, change N150
change UEM.
© 2003 Nokia Corporation.
Page 62 Issue 1 10/2003