LG -D722V Service Manual page 41

4. 5. 2. 1. Checking GSM PAM DC Power Circuit
3.5.2.1 Checking GSM PAM DC Power Circuit
Test Point
TP1
TP2
TP2(1328)
LGE Internal Use Only
TP2(1328)
3/4G
+VPA0
2G
35
RFOUT_B1
34
RFOUT_B3
33
RFOUT_B4
32
RFOUT_B2
31
RFOUT_B5_B26
30
GND14
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
GND
TP4(R1303)
TP4(R1303)
1
RFIN_B1_B2
2
RFIN_B4
3
RFIN_B26
4
RFIN_B5_B8
5
GND1
6
U1300 VIO
7
GND2
8
SCLK
9
SDATA
10
GND3
11
VBATT
12
GND4
13
RFIN_GSM_HB
14
RFIN_GSM_LB
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3. TROUBLE SHOOTING
Circuit Diagram
TP3(R1302)
TP3(R1302)
+1V8_VREG_L10
R1302 0
1 2
RFFE1_CLK
R1303 0
RFFE1_DATA
+VPA_BATT0
TP1(C1318)
TP1(C1318)
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Only for training and service purposes
TP3
TP4