LG KE970 Service Manual page 119

7. CIRCUIT DIAGRAM
1 2 3
A
VC1 VC2
PIN 14 PIN 13
GSM850_EGSM TX H L
DCS_PCS TX L H
GSM850 RX L
L
EGSM900 RX L L
DCS1800 RX L L
PCS1900 RX L L
B
C
D
E
F
G
H
1 2 3
4 5 6
C405
L406 3.3nH 22p LSHS-M085FE
R404
G3 ANT G2 ANT FL401
ANT RF
4 G1 17
C406 0
G2
3 SW401 L401
G1 NA C407
2 KMS-512 100nH
1.2p
WFL-R-SMT10
CN401
GSM850 GSM900 DCS1800
1V5_RF 2V85_RF 2V85_RF
C416 C417 C418
C419 C420 C421
2.5p 2.5p
2.2p
2.2p 1.5p 1.5p
C424 C425
0.1u 0.1u
L404
L402 L403
18nH 5.6nH
22nH
FE2
33
VBIAS VBIAS
34
VDDTX1V5 VDDRX2V8
R409
35
LBAND_PAM_IN TX1 VDDRX1V5
U403
R410 0 36
HBAND_PAM_IN TX2 VCO_RC
PMB6272
37
0 VDDTX2V8 VDDVCO2V8
38
VDDMIX2V8 EN
R417 R418 R412 R413
39
C438 C439 R415
NA NA NA NA GND3 VDDXO2V8
40
10
0.1u 0.1u FSYS1
GND4 GND1
41
C440
100p
1V5_CORE 2V85_RF
R421
10
C445 C446
0.1u 0.1u
R423
0
4 5 6
7 8 9
2V85_RF
U401
NC7WV16P6X
Y1 A1 ANT_SW1
VCC GND
C401
1000p Y2 A2 ANT_SW2
R401
100ohm
R402
100ohm
C402 C403
100p 100p
10p
C404
GND25 GND15
27 26
GND24 GND14
28 25
GND23 GND13
29 24
GND22 GND12
30 23
GND21 GND11
31 22
GND20 GND10
C408 32 21 VSUPPLY
GND19 GND9
100p 33 20
GND18 GND8
34 19
GND17 GND7
U402
35 18
GND16 GND6
SKY77340
36 17
C409 C410
0.5p NA
GSM_OUT EN
9 8
GND5 GSM_IN
10 7
GND4 VRAMP
11 6
RSVD2 VBATT
PCS1900 12 5
GND3 RSVD1
13 4
R407 GND2 BS
0 14 3
GND1 DCS_PCS_IN
15 2
DCS_PCS_OUT MODE
C422 C423 16 1
C411 C412
1.2p 1.2p
NA NA
C426 C427 C413
L405 0.1u 1u 68u
5.6nH
2V85_RF 2V7_VCXO
1V5_RF
R408
C432 C433 C434 0
0.1u 0.1u 0.1u
C435
0.1u
(PIN21) (PIN20)
C436
20
19 R411 47n
R414
18 820 R416
0
17
RF_EN
16
C437
PT401
15
26MHZ_MCLK
14
1000p
13
2V7_VCXO
R419
0
R420
X401
620
3 1
OUT VCONT AFC
C442 C443
C441
4 2
1000p VCC GND 22p NA
BT_CLK C444
26MHz
1uF
R422
RF_CLK
0
RF_DA
R424
QX
0
C447 C448
NA NA
R425
Q
0
R426
IX
0
C449 C450
NA NA
R427
I
0
Changed by:
mentor
7 8 9
- 120 -
1 0 11 12
TXON_PA
LBAND_PAM_IN
PA_LEVEL
R405 1.2K
R406 0
VBIAS
PA_BAND
HBAND_PAM_IN
MODE
C428 C429 C430 C414 C431 C415
27p 100p 100p 100p 820p 100p
22K
RF_TEMP
10K
Engineer:
LG Electronics
Drawn by: H.T.LEE
R&D CHK:
B.Y.YANG TITLE:
KE/ME970 MAIN
DOC CTRL CHK:
(RF)
MFG ENGR CHK:
Date Changed: Time Changed: QA CHK: REV: 1.2 Drawing Number:
2006-10-25
10 11 12
A
B
C
D
E
F
G
H
Size:
A3
12 1 8 A
Page:
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