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4. TROUBLE SHOOTING
4.5.2 Checking RF Tx Level
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
PQ
120p
C101
C104
NA
4.7p
C717
A
C
G1
G2
KMS-518
SW100
NA
C138
L102
22nH
1000p
C114
0
L100
C146
2.7p
1000p
C195
L101
ANT100
0
ANT101 ANT102
C102
NA
15
5
GSM1800_RX1
GSM1800_RX2
6
7
GSM1900_RX1
GSM1900_RX2
8
17
GSM850_900_TX
1
GSM850_RX1
GSM850_RX2
2
3
GSM900_RX1
GSM900_RX2
4
NC1
23
NC2
24
VC1
19
20
VC2
VDD
21
ANT
11
9
GND1
10
GND2
GND3
12
13
GND4
14
GND5
16
GND6
GND7
18
GND8
22
GSM1800_1900_TX
FL100
LMSP43QA-538
C113
1000p
14
GND6
GND7
16
17
GND8
7
GSM_IN
9
GSM_OUT
3
TX_EN
VBATT
4
12
VCC
VRAMP
6
TQM7M5003
U101
2
BS
DCS_PCS_IN
1
DCS_PCS_OUT
15
5
GND1
GND2
8
10
GND3
11
GND4
13
GND5
C142
5.6nH
6.8p
C136
5.6nH
L113
L112
15nH
ANT_SEL1
ANT_SEL0
VREG_RF_SMPS
TP1
TP2
TP3
Schematic of the GSM Tx Block
Test Point of GSM Tx Block
TP1
TP2
TP3
Содержание KE990 - Viewty Cell Phone 100 MB
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