LG GS290 - Power on Trouble

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Only for training and service purposes
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4. TROUBLE SHOOTING
GS290 Operational Description Revision B
LG Electronics 64/136 LGE Property
4.2 Power on Trouble
Check Points
-Battery Voltage( Need to over 3.35V)
-Power-On Key detection (PWRON signal)
-Outputs of LDOs from PMIC
TP1
TP2
Q201
1
2
3
Q200
1
2
3
K03
1
2
1
2R
7
12
R
K57
K
001
222R
10K
R226
82
2
R
K2
RTC_2V11
KP_OUT[2]
RPWRON
KP_IN[6]
RPWRON_EN
END
PWRON
END_KEY_IN
END_KEY_IN
Power On
R225
DNI
0
R203
0
R202
NC7WZ08L8X_F113
U203
34
25
16
87
A1 VCC
B1 Y1
Y2 B2
GND A2
DNI
C242
VIO_2V62
RTC_2V11
_RESET
SPOWER_INT
PMRSTN
PM_INT
External Reset JIG Connector
TP1
TP2