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4. TROUBLE SHOOTING
LGE Internal Use Only
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
+2.75V
SFAY0010801
C
G1
G2
KMS-518
SW101
A
C39
DNI
GND3
23
GND4
GND5
24
GSM850_EGSM_TX
11
12
GSM850_RX1
13
GSM850_RX2
9
PCN_PCS_TX
PCN_RX1
16
PCN_RX2
17
PCS_RX1
18
PCS_RX2
19
VDD
7
22
WCDMA_1900
WCDMA_2100
20
WCDMA_850
21
D5015
2
ANT
CTRL1
3
CTRL2
4
CTRL3
5
6
CTRL4
EGSM_RX1
14
15
EGSM_RX2
1
GND1
8
GND2
10
FL102
ANT102
L103
100nH
0.1u
C34
C40
33p
0
R102
C35
33p
C42
33p
C41
DNI
33p
C5
C11
0.75p
VREG_SYNTH
0
C4
0.75p
L104
15nH
L109
ANT_SEL3
ANT_SEL0
ANT_SEL1
ANT_SEL2
W2100
W850
W2100 TX(1920 - 1980 MHz)
Rev.C
W850 RX(869 - 894 MHz)
SDDY0004701
SMPY0015801
SMPY0017801
W850 TX(824 - 849 MHz)
SCDY0003901
Band V
SCDY0003801
Band II
W1900 TX(1850 - 1910 MHz)
W1900
SDPY0002902
(1608)
(1608)
Band I
Rev.C
10dB
SDMY0001501
C94
R135
82
2.7p
+VPWR_WPAM
10nH
L121
330p
C119
R133
82
C86
100p
C85
1000p
GND2
9
PGND
11
2
RF_IN
8
RF_OUT
1
VCC1
VCC2
10
VMODE0
4
3
VMODE1
U108
SKY77170
6
CPL
ENABLE
5
7
GND1
L127
C134
1p
C89
33p
33p
C82
C87
10u
G2
G3
G4
G5
G6
G7
RX
TX
FL109
ACMD-7402-TR1G
ANT
G1
L138
NA
C129
1000p
2.2nH
L141
NA
L119
4
VBATT
12
VCC
VCCA
11
1
VEN_CELL
7
VEN_PCS
3
VMODE
GND2
9
10
GND3
GND4
14
5
NC
15
PGND
RFIN_CELL
2
RFIN_PCS
6
13
RFOUT_CELL
8
RFOUT_PCS
AWT6321R
U106
L120
NA
L143
4.7nH
L122
2.7nH
6.8p
C128
33p
C100
1nH
L125
C116
33p
C118
0.01u
C131
1000p
100p
C
107
C106
0.5p
R134
82
C83
33p
3.3nH
L129
33p
C115
L132
COU
32
IN
OUT
1
TER
4
NA
U107
LDC151G8820Q-359
33p
C130
C120
330p
33p
C97
DNI
C93
C99
33p
L130
NA
TER
4
U105
LDC15836M20Q-360
COU
3
2
IN
1
OUT
33p
C84
NA
L124
33p
C110
C95
100p
DNI
C137
22p
C90
33p
C108
GND2
GND3
GND4
GND5
RX1
RX2
TX
B7683
FL107
ANT
GND1
C136
DNI
L134
1.8nH
L139
2.7nH
C91
2.7p
0.5p
C133
33p
C122
ANT
GND1
GND2
GND3
GND4
GND5
GND6
RX_OUT
TX_IN
C117
10u
B7684
FL112
RX_WCDMA_2100
WCDMA_2100_ON
WCDMA_PA_R0
PDET_IN
RX_WCDMA_850_M
WCDMA_850_ON
WCDMA_PA_R0
WCDMA_1900_ON
RX_WCDMA_1900
RX_WCDMA_850_P
TP1
TP2
TP3
TP2
TP4
Summary of Contents for CT815
Page 1: ...Date May 2009 Issue 1 0 Service Manual Model CT815 Service Manual CT815 Internal Use Only ...
Page 221: ...Note ...
Page 222: ...Note ...