LG KG280 Service Manual - Page 52
Power On Trouble
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4. TROUBLE SHOOTING 4.4 Power On Trouble TEST POINT 2V75_VABB 2V75_VVCXO 2V8_VEXT U101 2V5_VMIC 2V85_VSIM 2V8_VMEM 1V8_VCORE Figure 11 CIRCUIT 2V8_VEXT 2V8_VMEM 1V8_VCORE 2V75_VVCXO 2V8_VEXT 2V75_VABB 2V5_VMIC 2V85_VSIM C11 VEXT01 VMEM R13 G17 VABB VCORE U11 P16 VMIC VVCXO F16 R14 VSIM A11 DATA0 DATA1 D9 DATA00 DATA01 C110 1u C111 1u C112 2.2u C113 1u C114 1u C115 1u C116 1u Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes - 53 - LGE Internal Use Only
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LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc.
All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
- 53 -
4.4 Power On Trouble
U101
2V8_VEXT
2V8_VMEM
2V75_VABB
1V8_VCORE
2V5_VMIC
2V75_VVCXO
2V85_VSIM
1V8_VCORE
2V75_VABB
2V75_VVCXO
1u
C115
2V8_VEXT
C116
1u
C114
1u
2V8_VEXT
C111
1u
2V5_VMIC
2V8_VMEM
P16
VMIC
R14
VSIM
VVCXO
F16
VCORE
U11
VEXT01
C11
R13
VMEM
G17
VABB
A11
DATA0
DATA1
D9
1u
C110
C113
1u
C112
2.2u
2V85_VSIM
DATA01
DATA00
TEST POINT
CIRCUIT
Figure 11