LG LG-D855 - Checking SP4 T (LTE B7;B28;B40) Block

3. TROUBLE SHOOTING
- 50 -
Copyright © 2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
3.4.2 Checking SP4T (LTE B7/B28/B40) Block
<Main Top>
U1302
TP2
TP3
TP4
TP1(2.7V)
100p C1126
U1302
8
11
10
4
13
3
2
1
7 6 12
14
5
9
15
GND5
ANT
GND1
GND4
RF2RF5
RF4
CTL3
CTL2
CTL1
RF3
VDD
GND3
RF1
GND2
100p
C1163
+2V7_VREG_L16
1n
C1164
C1119100p
GRFC_4
GRFC_6
GRFC_7
ANT_PRX_B40
ANT_TX_B40
ANT_TRX_B28A
ANT_TRX_B13
ANT_TRX_B7
TP2
TP3
TP4
TP1(2.7V)