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4. 6. WCDMA RF Part
4. 6. 2. WCDMA B1/2/5/8 Tx
4 6 2 WCDMA B1/2/5/8 Tx
3.6.2.1 Checking WCDMA PAM DC Power&Control Circuit
4. 6. 2. 1. Checking WCDMA PAM DC Power&Control Circuit
Test Point
TP2(1328)
3/4G
2G
40
LGE Internal Use Only
TP1
TP2
TP2(1328)
+VPA0
GND
35
RFOUT_B1
34
RFOUT_B3
33
RFOUT_B4
32
RFOUT_B2
31
RFOUT_B5_B26
30
GND14
U1300
29
RFOUT_B8
28
VCC1
SKY77629-21
27
VCC2
26
VCC_GSM
25
GND13
24
RFOUT_GSM_HB
23
GND12
22
RFOUT_GSM_LB
GND
4. Trouble Shooting
U1300
TP4(R1303)
TP3(R1302)
TP4(R1303)
1
RFIN_B1_B2
2
RFIN_B4
3
RFIN_B26
4
RFIN_B5_B8
5
GND1
6
VIO
7
GND2
8
SCLK
9
SDATA
10
GND3
11
VBATT
12
GND4
13
RFIN_GSM_HB
14
RFIN_GSM_LB
TP1(C1318)
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Copyright © 2014 LG Electronics. Inc. All right reserved.
3. TROUBLE SHOOTING
Circuit Diagram
TP3(R1302)
+1V8_VREG_L10
R1302
0
1
2
RFFE1_CLK
R1303
0
RFFE1_DATA
+VPA_BATT0
TP1(C1318)
Only for training and service purposes
TP3
TP4
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