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4. TROUBLE SHOOTING
C. GSM RF Transceiver Check
Figure 4-25. GSM900/DCS/PCS Transceiver (RF3300)
V
V
E
E
E
A
M
E
R
E
R
Check GSM RF
Output power at ②.
LGE Internal Use Only
RF3300
(U103)
TP24_RF
5
1
C
C
A
2
2
7
C
C
A
1
5
6
T
X
H
B
5
4
T
X
L
B
5
2
M
O
D
G
T
X
_
V
5
0
X
H
B
2
4
8
X
H
B
1
GSM900/DCS/PCS
>5dBm
See Next page to check Tx path
② `
②
R
1
R
1
1
4
2
7
R
1
1
9
2
7
GSM900 Tx
(R121)
A
M
No
Yes
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Copyright © 2009 LG Electronics. Inc. All right reserved.
TP23_RF
DCS/PCS Tx
(R116)
GSM900 Tx
(R121)
1
5
G
T
X
_
1
8
0
0
_
1
9
0
0
0
DCS/PCS Tx
(R116)
DCS/PCS Tx
(R116)
G
T
X
_
8
5
0
_
9
0
0
GSM900 Tx
(R121)
Redownload SW
Only for training and service purposes
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Table of Contents
Troubleshooting
