Nokia RH-30 Series Troubleshooting Instructions page 54

ICQ: 343183001 QQ: 35070846 Email: Serviceic@yahoo.com.cn
Audio faults
2
Is microphone
No
working ?
Yes
Audio faults
3
Figure 19: Audio troubleshooting (3)
Try to change new
UI-module. Is it working
now ?
No
Restore old UI module. Set phone to
LOCAL mode. Using Phoenix
Audiotest set HP IN, EXT OUT,
LOOP ON
Measure MICB1-
voltage from MICP pad.
Is it ~2.1V ?
Yes
Check C151, R157,
C153 and line.
If OK change UEM if
still fail change UPP
Check mic contact springs
from old UI module.
Yes
If not OK replace
microphone in old UI
module with new one.
Retest.
Check L101, C151,
C152, C153, R156,
No
If OK change UEM
R157.