Checking Wcdma Block - LG KU800 Service Manual

4.5 Checking WCDMA Block

4.5.1 Checking TX POWER of WCDMA 2100MHz
L1030
0
Antenna
WCDMA +VPWR
TP3
C1063
2p
2.2nH
L1025
C1065
NA
C1072
120p
CP0402A1880EL
IN
2
OUT
1
U1004
Coupler
G1
G2
ANT G3
G4
G5
G6
G7
TP2
SW1000
G2
ANT RF
G1
KMS-506
L1031
12nH
RF Mobile
Switch
C1047 C1048 C1049
AWT6277R
22u
10n 100p
11
GND5
10
VCC2
9
GND4
8
RFOUT
7
GND3 VMODE
6
GND2
WCDMA
PAM
C1068
100p
smd_0603h_3_r
COUP
3
R1027
50OHM
4 62
ADL5500 U1006
VOPS VRMS
RFIN COMM
HDET
Duplexer
4. TROUBLE SHOOTING
TP1
33p
C1000
L1000
NA
U1003
1
VCC1
2
RFIN
3
GND1
R1024
4
5
VREF
C1058
smd_0603h_3_r
10n
C1060
smd_0603h_3_r
10n
Q2_E Q2_C
4 3
Q2_B
5
Q1_B
2
Q1_C Q1_E
6 1
Q1000
R1026
0
HDET1
C1076
10n
smd_0603h_3_r
TP1: RF Mobile Connector Output
TP2: Duplexer Output
TP3: WCDMA PAM Output
TP4: WCDMA PAM Input
- 83 -
R1000
NA
FEM
Module
TP4
220
PA_R1
RF SAW
VREG_RFRX_0_2.85V
PA_ON
C1073 C1074
0.1u 100p
smd_0603h_3_r
smd_0603h_3_r
VREG_RFTX_2.85V
ILNA_OUT
FL1000
EFCH1950TDC1 3
G3
4 1
OUT IN
G2 G1
5 2
0.5p
C1053
C1066 C1067
0.1u 100p
smd_0603h_3
smd_0603h_3_r
13
PLNA
14
ILNA_
15
PLNA
16
PLNA
17
ILNA_
18
ILNA_
19
VDDR
20
RX_IP
21
RX_IM
22
RX_Q
23
RX_Q
24
VDDA