LG D405 Service Manual page 34

+VPA0
L1616 1n
TP2
Chenck ANT_Logic Refer to 3.4
Check WTR2605
LGE Internal Use Only
CPL_IN_OUT
EAN62687101
CPL_OUT
6
GND VMODE_0
7
CPL_IN VMODE_1
8
RFOUT
9
VCC2
10
PGND
11
SKY77761
C1613 C1614
10u
10n
DRBFM
Check TP1
Over 21 dBm?
No
Check TP2
Over 21 dBm?
No
Check TP3
Over ‐3dBm?
No
+VPA_BATT0
PA0_ON_1
VEN
5
PA0_R_0
4
PA0_R_1
3
RFIN
2
VCC1
1
U1600
C1617
C1618
10u
1.5n
Yes
RF Tx Level is OK
Yes
Yes
- 34 - Copyright © 2014 LG Electronics. Inc. All right reserved.
3. TROUBLE SHOOTING
C1671
C1676 100p C1672 100p
FL1603
4 1
C1673 DNI C1674
OUT IN
G3 G2 G1
5 3 2
1950MHz
FL1603 => DNI
TP3
Check FL1600
Check PAM
Only for training and service purposes
100p
WTR_TX2_OUT
DNI