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(2) Checking Mobile SW &Tx module
TP5
(7/16) U400 : RF7180 -> RF7182
TP1
(7/17)
SW400
C466
1.5n
2
ANT
COMMON
1
G3
G4
L411
3
4
DNI
component changed (12/5)
LGE Internal Use Only
TP6
TP7
TP4
TP2
TP3
VBAT
Changed (9/10)
C410
22u
C408
0.1u
(10V, X5R)
C409
22p
(50V)
NC1
12
GND5
13
C467
2.7n
GND6
14
ANTENNA
U400
15
NC2
16
C415
L456
1.2p
47n
Changed (8/9)
TP1
SW400
Figure 4.2.1
TP2
TP5
TP4
Changed (7/27)
TP3
C463
C464
C465
C407
DNI
DNI
DNI
220p
Changed (11/6)
close to TXM
Shielding by GND
GND4
6
GND3
C461
100p
5
(50ohm)
RFIN_LB
4
GND2
C462
100p
3
(50ohm)
RFIN_HB
2
GND1
(7/3) DC Blocking
1
C451
DNI
TP7
(12/28) Changed
L402
2.2n
1
GSM850/900_UnB
2
C457
GND1
1p
3
GND2
L405
4
GSM1800/1900_UnB
2.7n
2
C460
1p
TP6
1
(7/27)
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4. TROUBLE SHOOTING
RF_ANT_SW2
RF_ANT_SW1
RF_PA_EN
R407
10K
RF_TX_RAMP
R409
24K
LowBand_Tx
HighBand_Tx
C452
DNI
L451
12n
1
2
9
GSM850/900_Bal2
L452
12n
8
1
2
GSM850/900_Bal1
FL400
L454
3.9n
7
GSM1800/1900_Bal2
6
GSM1800/1900_Bal1
L455
3.9n
Changed (9/26)
(7/18) coil -> non_coil
(7/27) 0603 -> 1005
(12/28) Changed
Only for training and service purposes
LB_RxN
L401
Changed (9/10)
33n
LB_RxP
HB_RxP
L403
Changed (9/25)
6.8n
HB_RxN
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