LG KP270 Service Manual page 115

4. TROUBLE SHOOTING
TP5 TP5
TP4 TP4
TP3 TP3
TP6 TP6
TP7 TP7
TP8 TP8
G1
ANT RF
G2
SW501 KMS-512_P
TP2
FL504 B7684
C570 12p
3G_RF_BC1 ANT TX_IN
L515 RX_OUT
5.6nH
GND1 GND4
GND2 GND5
GND3 GND6
_BC1(2.1G)
TP2
FL504
C570 12p
ANT
L515
5.6nH
GND1
GND2
GND3
LGE Internal Use Only
TP1
C563 10p 1
2
C565 L511 3G_LNA_CTRL_BC1
DNI
2nH
3
3G_LNA_GAIN_CTRL
C569
VBAT
TP3
100p
ACPM-7381
11
PGND
10
VCC2
9
L514 2.7nH GND3
8
RFOUT
7
GND2
6
C576 C577 GND1
0.5p
0.5p
C578
220p
TP6
TP3
L514 2.7nH
L528 2.7nH
C576 C577
C575
0.5p
0.5p
DNI
TP1
TP2
2V85_VRF
U506 BGA711L7
6 C564 47p
RFIN RFOUT
5
EN RREF C566
DNI
4
GS VCC
TP4
C567 C568 R524
0.01u 12p 27K
TP7
U507
1
VCC1
L528
2
RFIN
3
VMODE1
4
VMODE0 3G_PA_MODE1
C575
5
VEN 3G_PAEN_BC1 DNI
C579 C580 C581 C582
2.2u 100p 100p
220p
1608
TP8
TP4
FL503
SAFEB1G95FL0F00
1 3
OUT IN1
2 4
G1 IN2
C572
5
1p G2
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SAFEB2G14FA0F00
L509 2nH
FL502
2 3
1 G1 O1 L508
IN
4.7nH
G2 O2
L510 2nH
5 4
TP5
L513 22nH
FL503 L512 3.9nH
SAFEB1G95FL0F00
2.7nH
1 3
OUT IN1
L517
5.1nH
2 4
L518 22nH
G1 IN2 L516 3.9nH
C572
5
1p G2
TP5
L512 3.9nH
FL503
SAFEB1G95FL0F00
1 3
OUT IN1
2 4
L516 3.9nH
G1 IN2
5
G2
TP5
Only for training and service purposes
3G_RX_BC1
3G_RX_BC1X
2V85_VRF
3G_TX_BC1
3G_TX_BC1X
C573 C574
0.1u 4p
L517
5.1nH