- 50 -
4. TROUBLE SHOOTING
4.5 Power On Trouble
Check Points
-Battery Voltage( Need to over 3.35V)
-Power-On Key detection (PWRON signal)
-Outputs of LDOs from ABB(Triton-Lite)
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
V_ABB
U11
VRMEM
VRMMC
T10
VRPLL
T12
VRRTC
N17
A3
VRSIM
VRUSB
B8
B14
VRWLED_1
VRWLED_2
A15
B2
VRABB
L17
VREXTH
G17
VREXTL
VRIO
J16
A2
NC2
NC3
A16
A17
NC4
B1
NC5
NC6
T17
NC7
U16
U17
NC8
A1
NC1
V_MMC
V_RTC
V_EXTL
V_PLL
V_USB
V_IO
V_EXTH
D100
SDB0530
VBAT
1u
C136
C158
1u
C163
2.2u
1u
C159
C154
0.1u
V_MEM
C162
1u
3.3
R126
C156
1u
C161
1u
C155
1u
2.2u
C143
L103
2.2uH
470n
C157
1u
C160
V_SIM
VRWLED
V_ABB
V_SIM
V_
EXTL
V_
EXTH
V_SIM
V_
U
S
B
V_
RTC
V_
IO
V_MEM
U300
X100
R213
TP1
TEST POINT
CIRCUIT
END
R213
150
KB200
EVLC14S02050
VA202
RPWON
TP 1
WAVE FROM