Advertisement
Customer Care Europe, Middle East & Africa
SCCE Training Group
Vibra failure
Check contact springs of vibramotor, make sure that pads for vibramotor on PCB are clean.
Check VB 3.6 VDC at vibra pad located to the edge of the PCB, at the other pad and pin 16 of N400. You can check vibra signal
with a scope (WinTesla: Testing/Vibra). Also check R401.
Figure 11-1
Check VB 3.6 VDC at pin 1 and VBB 2.8 VDC at pin 2 of N400.
Check vibra_cnt at pin 19 of N400. If signal is ok but vibra does not work, change N400, else there is a disconnection between
D300 and N400 or MAD is faulty.
Buzzer failure
Check mechanical condition / contact springs of buzzer.
Check VB 3.6 VDC at E401.
Check PWM- signal at E400 and pin 6 of N400.
Check VB 3.6 VDC at pin 1 and VBB 2.8 VDC at pin 2 of N400.
Check buzzer_cnt signal at pin 3 of N400. If signal is ok but buzzer does not work, change N400,
if signal is not ok, there may be a disconnection between D300 and N400 or MAD is faulty.
Clock time problems
In case that clock time has to be corrected in short periods check amplitude and frequency of sleepclock-oscillator at C220
(3 Vpp squarewave at 32.768 kHz).
If amplitude or frequency is not ok, change crystal B200.
If fault persists, check parts around B200 as R211/212/214 and C229/230.
Figure 11-2
32.768 kHz measured at pad of C220 located towards crystal B200.
© NMP 2002
CONFIDENTIAL
NHM—2/5/6
3410
Date 20.11.2002
Checked by:
Customer Care E&A
32 (44)
Repairhints
Version 4.0 Approved
Approved by:
SCCE Training Group
Advertisement
