LG KF700Q Service Manual page 119

SW101
ANT
4. TROUBLE SHOOTING
VREG_RF_2.85V
VREG_RF_2.1V VREG_RF_2.1V
RX_W_2100_LNA_OUT RX_W_2100_LNA_OUT
L120 2.7nH
C180
C181
1.2p
DNI
6
PDET_IN
TP2
NC4
13
C194 C194 33p 33p
RFOUT_CELL
14
NC5
15
C1001 C1001
RFOUT_PCS
16
DNI DNI
NC6
17
NC7
18
0 2.2nH
RF5184
C195
1p
C1002
DET
LGE Internal Use Only
KMS-507
C105
G2
RF
G1
56p
FL101
D5015
2
ANT
1
GND1
8
GND2
10
GND3
23
GND4 GSM850_RX1
24
GND5 GSM850_RX2
WCDMA_2100
WCDMA_850
WCDMA_1900
PCN_PCS_TX
GSM850_EGSM_TX
C129
33p
C170 C170
120p 120p
L115 4.7nH
C169 33p
C171
DNI
FL104 B7683
ANT TX
L121
RX1
RX2
GND1
L122
GND2 GND5
NA
GND3 GND4
L125
C178
2200p
GND3 GND3 GND4 GND4
GND2 GND2 GND5 GND5
C186
GND1 GND1 GND6 GND6
2200p
TX TX
VCC1_CELL
L131 L131 1nH 1nH
6
RFIN_CELL
ANT ANT RX RX
5
VMODE_CELL
FL106 FL106 B7646 B7646
4
VREG_CELL
3
RFIN_PCS
2
C1003 C1003 15p 15p C1004 C1004
VREG_PCS
1
RX_WCDMA_2100 RX_WCDMA_2100
L133 L133
2.2nH 2.2nH
U104
2200p
VREG_RF_2.85V
L132
C1005
1nH
2200p
18
PCS_RX1
19
PCS_RX2
16
PCN_RX1
17
PCN_RX2
14
EGSM_RX1
15
EGSM_RX2
12
13
20
WCDMA_2100
21
WCDMA_850
22
9
11
Vbias
TP4
L114 L114
2nH 2nH
L117 L117
C172 C172 33p 33p
3.9nH 3.9nH
C173 C173
0.75p 0.75p
U103
LDC15836M20Q-360
C177 56p
1.5p
RX_WCDMA_850_P
L123
12nH
1.5p
RX_WCDMA_850_M
PWR_DET PWR_DET
U105 U105
LDC151G8820Q-359 LDC151G8820Q-359
C188 C188 5.6p 5.6p
VREG_WCDMA_PA
C199 C199
DNI DNI
33p 33p
C198 C189
4.7u
1000p TP3
C1006
1000p
- 120 -
L116 L116 1nH 1nH
RX_W_2100_LNA_OUT
2 3
G1 G1 O1 O1
1
FL103 FL103 C174 C174
IN IN
SAFEB2G14FA0F00 SAFEB2G14FA0F00
G2 G2 O2 O2
0.5p 0.5p
5 4
L118 L118 1nH 1nH
L120 2.7nH
C180
C181
1.2p
DNI
PA_ON0
R116 R116
PDET_IN PDET_IN
82 82
VREG_RF_2.85V
13 13
14 14
15 15
FL105
16 16
4 5
EFCH836MTDB1
17 17
O1 G3
L126 1
IN 18 18
18nH
G2 G1
L130 L130 2.2nH 2.2nH 3 2
C187
DNI
C195 C195
1p 1p FL107
SAFEB1G95KA0F00
C1002 C1002
3
L128
G3
4 1
OUT IN
G2 G1
2.7nH
5 2
C196 C197
DNI DNI
PWR_DET PWR_DET
VREG_RF_2.85V
PA_ON1
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
VREG_RF_2.1V
C170
120p
WB_MIX_INM WB_MIX_INM
WB_MIX_INP WB_MIX_INP
C178
2200p
C186
2200p
NC4 NC4 VCC1_CELL VCC1_C
6
RFOUT_CELL RFOUT_CELL RFIN_C RFIN_CELL
5
NC5 NC5 VMODE_C VMODE_CELL
4
RFOUT_PCS RFOUT_PCS VREG_C VREG_CELL
3
NC6 NC6 RFIN_PCS RFIN_
2
NC7 NC7 VREG_PCS VREG_
WCDMA_850_TX_OUT
1
RF5184 RF5184
U104 U104
2200p 2200p
VREG_RF_2.85V
WCDMA_2100_TX_OUT
L132 L132
C1005 C1005
1nH 1nH
2200p 2200p
L114
2nH
C172
C198 C
4
1000p