Audio Fault 2 - Nokia NPL-4 Series Troubleshooting Instructions

Nokia Customer Care

Audio fault 2

Audio faults
2
Is microphone
working ?
Yes
Audio faults
3
Copyright © 2005 Nokia Corporation. All rights reserved.
Issue 2 05/05
Company confidential
Try to change new
No C-cover assembly. Is it
working now ?
No
Restore old C-cover. Set phone to
LOCAL mode. Using Phoenix
Audiotest set HP IN, EXT OUT,
LOOP ON
Measure MICB1-
voltage from J110 pad.
Is it ~2.2V ?
Yes
Check C153, C151,
R157 and lines.
If OK change UEMEk.
If still fail change UPP
Troubleshooting Instructions
Check mic contact springs
from old C-Cover assembly.
Yes
If not OK change PopPort
assembly to old C-cover.
Retest.
Check L101, R156,
R150, C152, R171and
No
lines.
If OK change UEMEk
NPL-4/5/
Page 73