Rf Part Component - LG KP151Q Service Manual

4.2 RF Part Component

SW400
< PCB Placement>
V_EXTH
ANT_SW1
ANT_SW2
C433
C431 C432
1000p 1000p 1000p
<ASM interface>
REFERENCE
U102
U400
X101
FL400
SW400
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
U102
X101
U400
FL400
FL400 LMSP43QC-789TEMP
1
GSM1900_RX1
19 2
VC1 GSM1900_RX2
20
VC2
3
GSM1800_RX1
21 4
VDD GSM1800_RX2
9 5
GND1 GSM900_RX1
10 6
GND2 GSM900_RX2
12
GND3
13 7
GND4 GSM850_RX1
14 8
GND5 GSM850_RX2
16
GND6
18 15
GND7 GSM1800_1900_TX
22 17
GND8 GSM850_900_TX
DBB(Included RF Block)
PAM (Power Amp. Module)
DCXO (26MHz)
FEM (Front Ended Module)
Mobile Switch
- 43 -
4. TROUBLE SHOOTING
< PCB Placement>
FL400 LMSP43QC-789TEMP
1
GSM1900_RX1
19 2
VC1 GSM1900_RX2
20
VC2
3
GSM1800_RX1
21 4
VDD GSM1800_RX2
9 5
GND1 GSM900_RX1
10 6
GND2 GSM900_RX2
12
GND3
13 7
GND4 GSM850_RX1
14 8
GND5 GSM850_RX2
16
GND6
18 15
GND7 GSM1800_1900_TX
22 17
GND8 GSM850_900_TX
<SAW Filter interface>
PART Description
C426
PCS_RXN
3.5p
C427
PCS_RXP
3.5p
C428
DCS_RXN
2.7p
C429
DCS_RXP
2.7p
C430
EGSM_RXP
3.5p
C434
EGSM_RXN
3.5p
C435
GSM_RXP
4p
C436
GSM_RXN
4p
LGE Internal Use Only