User Guide

Nokia Customer Care Troubleshooting Instructions
Company confidential NPL-4/5
Issue 1 05/04 Copyright © 2004 Nokia Corporation. All rights reserved. Page 73
Audio fault 2
Audio faults
2
Is microphone
working ?
Try to change new
C-cover assembly. Is it
working now ?
Measure MICB1-
voltage from J110 pad.
Is it ~2.2V ?
Restore old C-cover. Set phone to
LOCAL mode. Using Phoenix
Audiotest set HP IN, EXT OUT,
LOOP ON
Check L101, R156,
R150, C152, R171and
lines.
If OK change UEMEk
Check mic contact springs
from old C-Cover assembly.
If not OK change PopPort
assembly to old C-cover.
Retest.
No
No
No
Audio faults
3
Check C153, C151,
R157 and lines.
If OK change UEMEk.
If still fail change UPP
Yes
Yes
Yes