Uplink Missing Audio Signal - Nokia RM-14 Baseband Troubleshooting And Manual Tuning
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Also See for RM-14:
- Rf troubleshooting and manual tuning (44 pages) ,
- Service software instructions (40 pages) ,
- Service tools and service concepts (20 pages)
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RM-14
Baseband Troubleshooting and Manual Tuning
Uplink missing audio signal
No
ISSUE 1 11/04
Figure 14:Uplink missing audio signal
Start
No
Is mute
deactivated?
mute in menu
Is problem
present both with
hand portable
and accessory?
Yes
Is problem
No
Accessory is
solved when
defective
using
accessory?
Yes
*)
Are any of the bias
No
components defective ?
Measure
(check R153, C151 and
mic. bias. Is
R154
R151 for hand portable
it close to
and R156, C158, R166,
2.1 V ?
C159 and L152 for
Yes
Replace
No
defective parts.
Is bias close to
2.1 V ?
*) Some of the components
under shield, not changeable
or measurable parts.
Yes
Are microphone
No
contacts and
contacts and
PWB pads ok ?
Yes
Replace
microphone
COMPANY CONFIDENTIAL
Copyright © 2004 Nokia. All Rights Reserved.
Deactive
*)
No
accessory)
Clean
pads
Nokia Customer Care
Replace
UEME
23
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