LG KG270 Service Manual page 91

7. CIRCUIT DIAGRAM
1 2
TP400 TP401 TP402 TP403 TP404 TP405
R400
NA
R401 0
A
C400 1p
L401 22nH
SW400
RF500
B
C410
22p
FL400 LMSP2PAA-575TEMP
9
IN GSM1800_1900TX
GSM1800_1900RX
3
VC1
VC_GSM850_900TX
7
C VC2 VC_GSM1800_1900TX
5
C417 C418 GND1 GSM850_900TX
8
27p 27p
GND2 GSM850_900RX
10
GND3
D
E
1 2
LGIC(42)-A-5505-10:01
3 4 5
C403 C404 C402
10u
12p 0.01u
(2012)
R406
C411
NA
R410
1
C415
6
NA
2
4
PART_NO SFSB0001401
IN CASE OF GSM850/PCS1900
CHANGE THIS DUAL SAW FILTER
TO PART_NO SFSB0001301
3 4 5
6 7 8
VBAT
VBAT
C405 C406 C407 C408
33p 18p 27p 0.01u
(50V,J,NP0) (16V,K,X7R)
15 3
DCS_PCS_OUT DCS_PCS_IN
11 4
U400
EGSM_OUT EGSM_IN
SKY77318
0
19 18
C412
RSVD_GND ENABLE TXON_PA
NA
21 1
P_GND BS BS
C413 C414
27p 27p
0
C416
NA
C419 3p
GSM_RXN
L403
18nH
2 3 5 10
I2 O2_2
4 6
C420 3p
GSM_RXP
O2_1
7
O1_2 C421 3p
8
DCS_RXN
I1 O1_1
1 9
FL401 B9308
L404
5.1nH
C422 3p
DCS_RXP
Section Date
11/16
Designer
2006
Checked
2006
Approved
2006
LG Electronics Inc.
6 7
- 92 -
9 10
R404 R405
DCS_PCS_OUT
0 0
L402
NA
C409
NA
R407
GSM_OUT
0
R409
R408
NA NA
TP406
DEFAULT_BANDSEL
Sign & Name
Sheet/Sheets
GB3_RADIO
MODEL
KEE-OUN.PARK
DRAWING
RF
NAME
DRAWING
VER-1.1
NO.
A
A
C
D
4/4
LG Electronics Inc.