Power On Trouble - LG GD510 Service Manual

5. Trouble shooting
GD510 Operational Description

5.2 Power on Trouble

Check Points
-Battery Voltage (Need to over 3.35V)
-Power-On Key detection (PWRON signal)
-Outputs of LDOs from PMIC
Power On
R2
END
10Kohms
SPOWER_INT
LGE Internal Use Only
LG Electronics
3
2
1
Q202
KTC4075E
100K
R1
External Reset
VIO_2V62
R206
100K
U203
7
EXTRSTN
A1
6
B1
5
_RESET
Y2
4
GND
NC7WZ08L8X
END_KEY_EN
KP_IN[6]
KP_OUT[2]
END_KEY_EN
RTC_2V11
TP2
8
VCC
1
Y1
2
B2
3
A2
C209
100n
- 56 - Copyright © 2009 LG Electronics. Inc. All right reserved.
61/113
Revision A
RTC_2V11
TP3
TP1
3
2
1
Q1
KTC4075E
PM_INT
PMRSTN
LGE Property
Only for training and service purposes
PWRON
Power On
R2
END
10Kohms