Nokia 6310i Service Manual page 192

NPL-1
6 - Troubleshooting
Buzzer doesn't work
and there isn't any
mechanical problem
Replace Buzzer
UEM FAILURE (D200)
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Headset earpiece doesn't work
and there isn't any
mechanical problem
With headset connected,
measure C177 and C178
towards UEM - DC level 0.8V.
Press keypad tone 5 and
measure with oscilloscope. An
AC signal pressents.
OK
Measure C158 towards N150
with an oscilloscope. Same
AC signal present (higher
level).
OK
Measure R179 towards UPP
- DC level > 1.5V
OK
Check L150, R183, C158
(and C159, R161 for
Shortcircuit)
OK
Check R176, C179, R177,
R178, R180, C176, C177
and C178.
Ok
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Not OK
UEM FAILURE
Not OK
BOOMER FAILURE
Not OK
UPP FAILURE
Vibra doesn't work
and there isn't any
mechanical problem
Check vibra
Ok
Check L307, C307, C308
Ok
UEM FAILURE (D200)
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