LG D337 - Page 58

4. DOWNLOAD
- 58 -
Copyright © 2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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4. Trouble Shooting
P i
3.3.1.4 Checking RF Flow(SAW filter)
SAW
(FL1100)
Test
P
o
i
nt
TP1(DCS/PCS)
TP1: L1104 (DCS/PCS)
Circuit Diagram
TP1: L1112 (GSM850/EGSM)
TP1(DCS/PCS)
TP1(GSM850/EGSM)
Waveform
- 39 -
Figure 4.1.1 (a)
0.5p
C1104
1
2
DNI
C1106
1
2
C1107
DNI
1
2
C1105 22p
1
2
GSM850/900_Bal2
GSM850/900_Bal1
GSM1800/1900_Bal2
GSM1800/1900_Bal1
GND4 GND3
GSM850/900_UnB
GND1
GND2
GSM1800/1900_UnB
FL1100
4321
510
6
7
8
9
2.2nL1112
2
1
0603 for layout
C1102
2
1
3n
C1103
1
2
1.2p
L1104
2
1
2.2n
TP1(DCS/PCS)
TP1(GSM850/EGSM)
4. Trouble Shooting
P i
3.3.1.4 Checking RF Flow(SAW filter)
SAW
(FL1100)
Test
P
o
i
nt
TP1(DCS/PCS)
TP1: L1104 (DCS/PCS)
Circuit Diagram
TP1: L1112 (GSM850/EGSM)
TP1(DCS/PCS)
TP1(GSM850/EGSM)
Waveform
- 39 -
Figure 4.1.1 (a)
Figure 4.1.1 (a)