User Guide

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