User Guide

CCS Technical Documentation BB Description & Troubleshooting
Company Confidential RH-4
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Audio Faults 2
Audio Faults 3
Is HP Microphone
working
Measure MICB1 DC
voltage from MICP
pads. Is it >1.0VDC?
Try change
Microphone. Is it
working now?
Retest
Check R160,
C152,C175,C183,R156,R
155,L153,C154 and line.
If OK change UEM.
Set phone in LOCAL
mode. Use Phoenix
Audio Test. Set HP IN,
EXT out, LOOP ON
No
Yes
Yes
No
No
Check
R153,R157,C153,C159,C
171,C172 and line. If OK
change UEM. If still fail
change UPP.
Yes