3. TROUBLE SHOOTING
- 113 -
Copyright © 2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Check TP1 +1V8_VREG OK?
Check TP2 0.5V≤TP2≤4.2V?
Check U1653 physical damage
or soldering condition
And change C1653 to 100 pF
START
Check next step
Yes
Yes
No
No
The Problem may be Other part
Check Logic part
Check DC-DC Power Block
Refer to 4.3
DNI
L160
7
FL1600
2655MHz
7
6
5
9
3
8
2
1
4
ANT
TX
GND1
GND5
GND2
GND6
GND3
GND4
RX
L1606
100p
L161
0
0.75
p
0.5p
L161
1
L160
8
3.3n
1.5n
L1754
2
1
8.2p
C1753
L1753
100p
1
2
100p
C1857
1
2
C1603
1.5n
ANT_TRX_B7
WTR_B7_PRX_HB3
TP2
TP1
Yes