LG KF690 Service Manual page 101

4. TROUBLE SHOOTING
4.16.2 Checking RF Tx Level
LGE Internal Use Only
SW101
FL100
KMS-507
DGM112M02
12
C100
PCN_RX1
1 13
G2
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
24
GND8
21
TP1 WCDMA_2100
9
PCN_PCS_TX
11
GSM850_EGSM_TX
C114
DNI
C109 C112
10n 10n
TP3
R109
0
L115
NA
[Fig. 4.13] Schematic of the GSM Tx Block
[Fig. 4.14] Test Point of GSM Tx Block
- 102 -
L1
6.8
DCS
L101
18nH
L1
6.8
L104
5.6nH
PCS L105 L
22nH 4
L107
5.6nH
L109
18nH
C117
GSM L110
1p
47nH
L111
18nH
TP2
C133
C134 C
56p 100p 2
t
L113
1.5nH
2
DCS_PCS_IN
L114
8.2nH 16 7
DCS_PCS_OUT U101 GSM_IN
SKY77329
9 1
GSM_OUT TX_EN
3
BS
C135
82p
GSM_PA_BAND
C141
1000p
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