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