User Guide

RH-12/RH-28
Baseband Troubleshooting Instructions CCS Technical Documentation
Page 30 Nokia Corporation Issue 1 02/04
Downlink weak audio signal
IHF is defective.
Check IHF
speaker and
connections.
Check UEME.
Is problem
related to
earpiece or IHF?
Start
Earpiec
e
Is problem
present both in
earpiece and
IHF?
IHF
Earpiece is
defective. Check
earpiece speaker
and connections.
Check UEME.
Software or
UEME is
defective
Yes
No
Is IHF
opening
clogged?
Clean
IHF
opening
Yes
No
Is IHF
opening
clogged?
Clean
earpiece
opening
Yes
No