3. TROUBLE SHOOTING
- 30 -
Copyright © 2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
3.3 Checking DC-DC Block
C1409
DNI
PACB
PVIN1
BGND
PGND
SCLK
SVDD
GPO1
SW
1
ACB2
ACB1
SW
2
SDATA
FB
VIO
SGND
PVIN2
LM3263
U1400
B1
D3
C1
C3
C2
B2
A4
C4
A2
D2
D4
D1
A3
B3
A1
B4
C1400
10u
1n
C1403
C1408
DNI
10
u
C1
1.5u
L1400
C1401
0.1u
RFFE1_CLK
RFFE1_DATA
TP2
TP4
TP1
TP3
4. Trouble Shooting
4. 3. Checking DC-DC Block
Test Point
TP4
TP2
TP3
U1400
TP4
Circuit Diagram
TP1
TP1
TP1
TP2
TP4
15
TP3