LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
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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
2.2u
C249
2SC5663
Q203
100K
R213
Q201
2SC5663
R216
3.3M
3.3M
R214
2V11_RTC
RPWRON_EN
PWRON
END_KEY_IN
EXTERNAL RESET
2V62_VIO
7
A1
3
A2
6
B1
2
B2
4
GND
8
VCC
1
Y1
5
Y2
NC7WZ08L8X
U203
0.1u
C255
100K
R221
2V11_RTC
EXTRSTn
SPOWER_INT
PM_INT
PMRSTn
_RESET
TP1
TP2