LG MG370 Service Manual page 83

7. CIRCUIT DIAGRAM
1 2
A
ANT400 ANT401 ANT402 ANT403
R400
NA
R401
NA
L400
15nH
B
C410
100p
C413
1p
L403
1.2nH
RF-800
SW400
C
C420
22p
VC1
VC2
C423 C424
27p 27p
MODE
D
850/900 TX
1800/1900 TX
850/900/1800/1900 RX
E
1 2
LGIC(42)-A-5505-10:01
LGE Internal Use Only
3 4 5
C400
10u
(2012 size)
R402
R403
TX_RAMP
NA 1K
L401
1.5nH
C411 C412
NA 1.8p
L402
2.7nH
C417 C418
NA 2.2p
FL401
9 1
IN GSM1800_1900TX
6
GSM1800_1900RX
3
VC_GSM850_900TX
7
VC_GSM1800_1900TX
5 2
GND1 GSM850_900TX
8 4
GND2 GSM850_900RX
10
GND3
LMSP2PAA-575TEMP
VC1 VC2
H L
L H
L L
3 4 5
6 7 8
C401 C402 C403 C404 C405 C406
12p 0.01u 33p 18p 27p 0.01u
C408
39p
15 3
DCS_PCS_OUT DCS_PCS_IN
11 4
U400
EGSM_OUT EGSM_IN
SKY77318
19 18
TXON_PA
RSVD_GND ENABLE
21 1
P_GND BS BAND_SEL
C414 C415
27p 27p
C419
3p
L404
5.1nH
FL400 B9310
C421
1 9
I1 O1_1
3p
8
O1_2
7
O2_1
C422
4 6
I2 O2_2
3p
2 3 5 10
L405
(B9308 for 900 Band)
18nH
C425
3p
R408
DEFAULT_BANDSEL
NA
6 7
- 82 -
9 10
SC400
10
1 11
2 12
3 13
4 14
5 15
6 16
7 17
8 18
9 19
Shield CAN
C409
DCS_PCS_OUT
100p
R404 R405
NA NA
C416
GSM_OUT
100p
R406 R407
NA NA
DCS_PCS_RXP
DCS_PCS_RXN
GSM_RXP
GSM_RXN
LG Electronics Inc.
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
A
A
C
D