Accessory Fault - Nokia 7600 Troubleshooting Manual

CCS Technical Documentation

Accessory Fault

Non ACI-Accessory
Measure ACI line
(pin 3). Is it ~0V?
Yes
Measure VOUT
(pin4) Is it ~2.8V?
Yes
No XEAR
Check L405-L407,
C416-C419 and
R421. OK?
Yes
Replace UEME
Issue 1 (11/2003)
Company Confidential
Start
Check system
connector X401
contacts and solder
joints. OK?
Yes
Check ACI line,
L4??, R429, R409.
No
If faulty, replace
defective part
and retest.
Check L4??
and R409.
No
OK?
Yes
Replace
UEME D200.
In a call, check In a call, check
operation of operation of XEAR
XEAR and XMIC
and XMIC.
Replace
No
defective part.
End
Copyright  2003 Nokia Corporation
Company Confidential
6-Troubleshooting
Repair or replace
No
system connector.
ACI-Accessory
Look for activiy on
No
the ACI line on
initial accessory
connection.
Replace
No
defective part.
No XMIC
Check L404, L403,
R415, C412 and
No
C413. OK?
Yes
Replace UEME
NMM-3
Yes
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