LG KG290 - Power on Trouble

LGE Internal Use Only Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
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4.4 Power On Trouble
2V8_VEXT
1V8_VCORE
2V75_VVCXO
U103
2V8_VMEM
2V5_VMIC
2V85_VSIM
C125 2.2u
VGP
C133
1u
C134
1u
1u
C130
2V8_VEXT 1V8_VCORE2V5_VMIC
1u
C129
1V8_VRTC
C127
1u
1u
C128
1u
C126
2V85_VSIM
T19
VUSB_A
VMEMFB
W13
VMEMOUT
V12
U12
VMEMSEL
VMIC
U19
VRF
M19
W15
VRTC
T11
VRTCSEL
V14
VSIM_A
VEXT_REG1
V11
VEXT_REG2
W11
VGP
W14
V8
VCORE
W8
VCOREOUT
N18
VABB_LDO
VAPP
P18
L14
VAPPCFG
VAPPGATE
N19
T13
PWREN
V17
J9
RESET1P8
27p
C131
0.1u
C135
VUSB 2V75_VVCXO
1u
C132
2V8_VMEM
TEST POINT
CIRCUIT
Figure 11