4. TROUBLE SHOOTING
- 50 -
Copyright © 011 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
4. TROUBLE SHOOTING
4.8.2 Sub Board
TP1
TP1
TP2
TP4
TP3
RP114K121D
U507
5
3
2
4
1
VOUT
VDD
GND
CE
D
N
G
P
1u
C540
C542
1u
C541
1u
1u
C543
0
R538
R540
0
1V5_DCDC
1V2_TX_PLL
1V2_RX_PLL
K0
1
24
5
R
0
R541
R537
DNI
R539
DNI
U506 RP114K121D
5
3
2
4
1
VOUT
VDD
GND
CE
D
N
G
P
0
R547
1V5_DCDC
K0
1
84
5
R
RF_PWR_EN
RXPLL_PWR_EN
TXPLL_PWR_EN
TP1
u0
1
12
5
C
1V2_RF
n0
01
02
5
C
K0
01
71
5
R
47p
C515
100K
R513
2.2u
L502
VLS3012T-2R2M1R5
K0
1
51
5
R
n0
01
61
5
C
u7.
4
71
5
C
SYS_PWR
U502
RT8016L-GQW
8
4
5
3
6
2
7
1
GND1
FB_VOUT
EN
GND2
VIN
LX
1
C
N
2
C
N
0
R511
RF_PWR_EN
RT8016L-GQW
8
4
5
3
6
2
7
1
U508
GND1
FB_VOUT
EN
GND2
VIN
LX
1
C
N
2
C
N
u7.
4
64
5
C
n0
01
54
5
C
R545
150K
10K
R543
K0
01
44
5
R
SYS_PWR
47p
C547
2.2u
L505
VLS3012T-2R2M1R5
0
R546
n0
01
84
5
C
u0
1
94
5
C
1V5_DCDC
TP2
TP4
RF Tx/Rx PLL LDO
RF DCDC
1.5V DCDC