LG GS290 - Vibrator Trouble

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4. TROUBLE SHOOTING
GS290 Operational Description Revision B
LG Electronics 78/136 LGE Property
4.8 Vibrator trouble
Check Points
-Vibrator soldering
-IC is working correct
Chec
k
PWM Signal
TP1 TP2
TP3
TP4
C330
C331
TP3
TP4
TP1
TP2
R311
GS290 Operational Description Revision B
LG Electronics 78/136 LGE Property
4.8 Vibrator trouble
Check Points
-Vibrator soldering
-IC is working correct
Chec
k
PWM Signal
TP1 TP2
TP3
TP4
C330
C331
TP3
TP4
TP1
TP2
R311
TPA6202A1ZQVRU303
B2C1
A1B1
B3C2
A3C3
IN- VDD
IN+ VO+
_SHUTDOWN VO-
BYPASS GND
100K
R318
100K
R310
52
3
R
K1
BU31TD2WNVX U302
5
3 2
4 1
VOUTVIN
GNDSTBY
DNGP
10nC316
51K
R311
100n
L301
413R
K
1
51K
R315
Q300
KRC402E
2
1
C
B
E
GND
IN
OUT
1u
C325
C330
1u
C331
1u
L307
100n
K
1
.5
12
3
R
C355
10n
VBAT
VB301
2
1
VIB_PWM
V
IB_EN
Vibrator
TP1
TP2
TP3
TP4