Nokia NHM–7 Series Troubleshooting Instructions page 17

PAMS Technical Documentation
Audio
faults 3
Is BUZZER working?
Yes
END
Issue 1 10/2001
Measure VBATT
No
voltage from B301.
Is it OK?
Yes
Set phone in LOCAL mode.
Use Phoenix Audio Test.
Set Buzzer volume ON.
Measure Buzzer
control signal
from BUZZER (C307).
Is it 1kHz pulses ?
No
Check C306,
C307, C308
and line.
IF OK –>
Change UEM
E Nokia Corporation
NHM–7
Troubleshooting Instructions
No
Check VBATT
line
Change
Yes
BUZZER
(B301)
Page 17