Checking Rf Tx Level - LG KF700 Service Manual

4.17.2 Checking RF Tx Level

C113
0.1u
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
SW101
FL100
KMS-507
DGM112M02
12
C100
PCN_RX1
G2 1 13
ANT PCN_RX2
ANT RF
G1
100p
14
PCS_RX1
2 15
GND1 PCS_RX2
3
GND2
8 16
GND3 EGSM_RX1
10 17
GND4 EGSM_RX2
20
GND5
22 18
GND6 GSM850_RX1
23 19
GND7 GSM850_RX2
TP1
24
GND8
21
WCDMA_2100
9
PCN_PCS_TX
11
GSM850_EGSM_TX
C110 C111 C114
10n 10n 10n
TP3
[Fig. 4.17] Schematic of the GSM Tx Block
[Fig. 4.18] Test Point of GSM Tx Block
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4. TROUBLE SHOOTING
DCS
L105
PCS
22nH
L108
18nH
C118
GSM
1p
L110
18nH
TP2
C134
56p
L502
1.5nH
DCS_PCS_IN
L501
8.2nH 16
DCS_PCS_OUT U101
SKY77329
9
GSM_OUT
R600
0
C139
82p
L111
NA
GSM_PA_BAND
C145
1000p
L100
6.8nH
L101
18nH
L103
6.8nH
L104
5.6nH
L106
4.7nH
L107
5.6nH
L109
47nH
C135
C128
100p 22u
tcc_16085h_9_r
2
7
GSM_IN
1
TX_EN
3
BS
C146
1000p
LGE Internal Use Only