User Guide

RH-4 Company Confidential
BB Description & Troubleshooting CCS Technical Documentation
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Earpiece 2
Connect EXT audio
signal 1kHz (Sine
200mVpp) to
XMICP pads and
Ground on XMICN
Change UEM
Change UPP
Check R169, R162,
C170, C166, C174,
C173 and lines.
Measure sine signal
from earpiece pads. Is
it ~320mVpp?
Measure sine
signal at UEM(R172)
is it ~200mVpp?
Retest
No
Yes
No
Yes