LG GD910 Service Manual page 113

8. CIRCUIT DIAGRAM
1 2
MAIN ANT
ANT401
A
1
C400
6.8p
2
C401
2.2nH
SW400
C405
MM8130-2600
B 100p
G3 G4
OUT IN
G2 G1
L426
C517
NA
DNI
2V85_VRF
C C439 C440
1000 pF 0.1u
FB401
ANT_SEL2
FB402
FB403
FB404
ANT_SEL6
U403
1 8
ANT_SEL1
A1 VCC
2 7
ANT_SEL4
B1 Y1
3 6
Y2 B2 ANT_SEL3
4 5
D GND A2 ANT_SEL5
NL27WZ32USG
GSM/EDGE
WCDMA
E
L413 FL402
1.5nH
6
ANT
L428
L414 2
GND1 GND6
82nH
2.7nH 4
GND2 GND5
5
GND3 GND4
SAYFP1G95AA0B00
F
DC/DC Converter (For 3G PAM)
VBAT
G
C500
C501
10n
10u
U407
L416 3.3uH
B1 A2
VDD SW
A1
PVIN
C3
FB
C2
WDCDC_VCON VCON
B3
SGND
C1 A3
C485 EN PGND
22p
LM3208TL
H
R419
WDCDC_EN
220
1 2
LGE Internal Use Only
3 4 5
BT_VCXO_EN
PM_VCXO_EN
C408 2.2p
L401
18nH
FL400
C423 2.2p
LMSP43QL-771
11
GSM850_900TX
9 C425 2.2p
GSM1800_1900TX
L402
2 12
ANT GSM850_RX1 18nH
13
GSM850_RX2
14 C431 2.2p
GSM900_RX1
15
GSM900_RX2
16 C432 2.2p
GSM1800_RX1
17
GSM1800_RX2 L403
5.1nH
18
GSM1900_RX1
1 19
GND1 GSM1900_RX2
8 C436 2.2p
GND3
10 20
GND2 UMTS1
23 21
GND4 UMTS2
C437 1.5p
24 22
GND5 UMTS3
L404
5.1nH
C441 1.5p
1800
1800
1800
VBAT
1800
2V85_VRF
C509 PGND GSM850_900_IN
15 7
6.8p
C444 GND3 TX_EN
8 6
1u
GND2
11
GND1 VRAMP
L405
14 5
U402
27nH
BY_CAP2 VBATT
9 4
BY_CAP1 BS
13 3
L406 GSM850_900_OUT MODE_SELECT
10 2
2.7nH
DCS_PCS_OUT DCS_PCS_IN
12 1
TQM7M5005
C449 C450 C451
1.5p
10n 10n
C453 C448 C454 C455
33p 10u 18p 0.1u
VBAT_PA VBAT
U405
1
RX L423 GND1 VEN
6 5
1.5nH
GND2 VMODE
3 7 4
TX RFOUT VBP
8 3
GND3 RFIN
9 9 2
VCC2 VCC1
8 C462 L429 10 1
PGND
7 11
DNI NA
C464 ACPM-7383 C465 C466 C468
C508 C467
1000 pF 2.2u 100p 100p
2.2u 100p
U406
C471
BGA711L7
47pF
C469 10p 1 6
RFIN RFOUT
2V85_VRF
2 5
EN RREF
C498
L425 3 4
DNI GS VCC
2nH
R411
C475 C504
27K 10n 12pF
C474
100p
VBAT_PA
C482 C483 C484
4.7u 2.2n 22p
3 4 5
6 7 8
1V8_SD
U400
NL17SZ32XV5T2
1 5
A VCC
C404
2
B 0.1u
3 4
GND Y
2V85_VRF 2V85_VRF
2V85_VFM 2V85_VRF
2V85_VRF
2V85_VRF
C433
0.1u C434 C435
3.3p 220n
E11
RXINH
F11
RXINHX
G11
RXINM
H11
RXINMX
C11
RXINL
D11
RXINLX
L5
TXOUTH
L6
TXOUTHX
L9
TXOUTM
L10
TXOUTMX
L3
TXOUTL
L4
TXOUTLX
A6
3G_RX_IP RXI
C6
3G_RX_IN RXIX
A4
3G_RX_QP RXQ
A5
3G_RX_QN RXQX
K10
3G_TX_IP TXI
J9
3G_TX_IN TXIX
L2
3G_TX_QP TXQ
K1
3G_TX_QN TXQX
K9
2G_IP I
J8
2G_IN IX
H7
2G_QP Q
H8
LBAND_IN 2G_QN QX
H1
RX1
J1
TXON_PA
RX1X
F1
RX2
R408 1.2K G1
PA_LEVEL RX2X
D1
RX3
E1
RX3X
B1
RX4
C1
2G_BS RX4X
L7
LBAND_IN TX1
L8
PA_MODE HBAND_IN TX2
HBAND_IN
C456
39p
FL401
L408
L407
L409 SAFEB1G95FL0F00
1.8nH 22nH
1 3 3.9nH
OUT IN1 L411
9.1nH
2 4
C459 L410 L412
G1 IN2
5
1.2p G2
22nH
3.9nH
BC1 : SAFEA1G95FL0F00
WDCDC_EN BC2 : SAFEA1G88FL0F00
3G_PA_MODE1
FL403
L419 4.3nH
SAFEB2G14FA0F00
2 3
G1 O1
1 BC1 : SAFEB2G14FA0F00 L415
IN
G2 O2 BC2 : SAFEB1G96FL0F00 1.5nH
5 4
L420 4.3nH
C473
DNI
6 7 8
- 114 -
9 10 11
2V85_VRF
C402 C403
10n 0.1u R400 100K
2V85_VRF
RF_TEMP
R402 R401 10K
2V85_VRF
10
2V85_VRF
1V5_VRF
L400
270nH
C426
0.1u
R404
4.7
2V85_VRF
K4
TXHSMODE
H5
TXGC 3G_VGC_TX
K3
TXEN
J11
LD 3G_LD
C3
MASTERON 3G_MASTERON
A8 C438 1000 pF
FSYSIN_3G
D2
ENPGC
B2
DAPGC
C2 2V85_VTCXO
CLKPGC
E3
EN 3G_EN
A2
DA 3G_DATA
B3
CLK 3G_CLK
F8
RXBAND1 C507
E10
RXBAND2 2.2u
D10
U404 RXBAND3
H10
TXBAND1
G10
PMB6952 TXBAND2
F10
TXBAND3
C505
R424
2.2n
C442 47pF
A9
FSYSOUT1
C9
FSYSOUT2
D9 C506
R425
FSYSOUT3 2.2n
C443 1000 pF
B10
FSYSIN_PM
C7
EN_PM 2G_EN
H9
R426 100K
DA_PM 2G_DATA
G9
CLK_PM 2G_CLK
K2
FE1 2G_BS
H3 2V85_VTCXO
FE2
J4 FB2
VBIAS
C5 R407 20
VCO_RC
C446 C447
1u 0.1u
R409
820
X400
R410
4 1
VCC VC
10K
6 5
NC2_GND2 NC1_GND1
3 2
OUT GND C452
10n
TG-5021BA 26MHz
2V85_VRF
SC400
1
2
3
4
5
6
7
8
9
10
11
9 10 11
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
12
A
B
C
1K
26MHZ
1K
26M_BT
2V85_VRF
D
AFC
E
F
12
13
14
15
G
16
17
18
19
20
21
22
H
12