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W1900_W2100_RTX
L1020
L1021
1.2p
1.8n
TP2
WCDMA DUAL
6
W850_W900_RTX
C1112
0.5p
L1033
2
5.6n
4
5
RTR6285 Maximum output Power = 7 dBm
RTR6285 minimum output Power = -80 dBm
LGE Internal Use Only
L1015
4.7p
C1076
L1016
1n
0.5p
FL1006
6
1
ANT
RX
L1022
3
TX
3.3p
2
9
C1089
GND1
GND6
4
8
C1091
10n
GND2
GND5
5
7
DNI
GND3
GND4
Band I
PDET_IN
R1018
110
TP3
VBAT
RX_WCDMA_900_P
c1104
C1103
8.2n
DNI
RX_WCDMA_900_M
FL1007
1
ANT
RX1
8
RX2
3
TX
GND1
9
GND2
GND5
C1116
C1117
7
GND3
GND4
1.2p
DNI
Band VIII
Check ANT_SEL 0,1,2
(High, Low, Low)
Check TP1 Over 21dBm?
No
Check TP2 Over 21dBm?
No
Check TP3 Over 21dBm?
No
Check TP4 Over 7dBm?
No
Check PAM Block
Refer to 1.5.4
RX_WCDMA_HB
VBAT
C1080
2
C1081
C1082
U1002
Close to pin1
2.2u
330p
330p
11
1
PGND
10
1
VCC2
VCC1
9
2
RFOUT
RFIN
8
3
CPL_IN
VMODE_1
7
4
GND
VMODE_0
6
5
CPL_OUT
VEN
C1093
100p
R1017
51
R1019
8dB
110
1
2
C1095
2
C1096
C1097
680p
2.2u
680p
1
U1003
11
PGND
10
1
VCC2
VCC1
9
2
RFOUT
RFIN
8
3
CPL_IN
VMODE_1
7
4
GND
VMODE_0
6
5
CPL_OUT
VEN
C1109
C1110
100p
100p
Yes
RF Tx Level is OK
Yes
Check TX Module
Yes
Check Duplexer
Yes
Check RTR6285A
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Copyright © 2013 LG Electronics. Inc. All right reserved.
4. TROUBLE SHOOTING
FL1004
C1132
C1131
1
4
IN
OUT
G1 G2 G3
1.8n
3G_PAM_MODE
33
2
3
5
PA_R0
C1133
PA_ON0
DNI
C1094
100p
TP4
ATTEN -> DNI
R1020
12
C1134
FL1008
C1135
100p
100p
1
4
W850_W900_TX_OUT
IN
OUT
G1 G2 G3
3G_PAM_MODE
2
3
5
PA_R0
C1107
PA_ON1
C1108
DNI
DNI
Only for training and service purposes
W1900_W2100_TX_OUT
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Table of Contents
Troubleshooting
