LG GD310 Service Manual page 119

8. CIRCUIT DIAGRAM
12 11
L
K
J
I
H
G
F
E
D
C
B
A
12 11
LGE Internal Use Only
10 9 8
VC1 (FE1) VC2 (FE2)
GSM850 / 900_TX H H
2V85_VRF
GSM 1800 / 1900_ TX L H
GSM850 / 900_RX H L
GSM 1800 / 1900_ RX L L
LMSP43QA-538(CMOS)
C416
1n
R400 100R
FE1
R405 100R
FE2
C413 C412
100P 100P
NC2
24
NC1
SW401 SW400 FL400 23
C420
LMSP43QA-538
G2
G2 ANT ANT RF ANT
G1 100P 11
G1 RF-800
UFL-R-SMT10 L406
C437 100NH
DNI
L404 5.6p
C446 C424
33n 27n
L405 C431
0.01U
GSM850 GSM900 DCS1800 PCS1900
3.9n
C423 C435
1V5_VRF 2V85_VRF 2V85_VRF DNI 1.5p
C408 C403
100n 4.7N
L403 L401 L402 L400
18n 18n 5.6n 5.6NH
1V5_VRF 2V85_VRF 2V85_VRF
C404 C432 C419 C418
100n 100n 100n 100n
FE2
33
VBIAS
34
VDDTX1V5 VDDRX2V8
35 20 C406 47N
LBAND_PAM_IN TX1 VDDRX1V5 R403
36 19
HBAND_PAM_IN TX2 VCO_RC
37 18 820
R407 VDDTX2V8 VDDVCO2V8
38 17
VDDMIX2V8 EN
10 39 16
GND3 VDDXO2V8
40 15 C405 1000P
C401
FSYS1
220N 14
GND4 GND1
41 13
1V5_VRF 2V85_VRF
X400 NX3225SA
4
GND2 HOT2 3
R404
1 HOT1 GND1 2
10
26MHZ
C410
C407
220N 100n
BT_CLK
RF_CLK
RF_DA
QX
Q
IX
I
SC400
1
SC_GD310
10 9 8
7 6 5 4
R401
RF_TEMP
22K
R402
10K
VBAT
C421 C440 C434
1U 33uF 27P
PGND GSM850_900_IN LBAND_PAM_IN
15 7
GND3 TX_EN TXON_PA
8 6
GND2
11 R406
GND1 VRAMP PA_LEVEL
10K
14 5
BY_CAP2 TQM7M5005H VBATT
9 4
U401
BY_CAP1 BS PA_BAND
13 3
GSM850_900_OUT MODE_SELECT PA_MODE
10 2
DCS_PCS_OUT DCS_PCS_IN HBAND_PAM_IN
12 1
TQM7M5005(5x5) C433 C429 C442 C436
C445 47P 100P 100P 100P
0.01U
SMPY0021101
BLUETOOTH_FM_MODULE(TAIYO YUDEN)
RF_EN
26MHZ_MCLK
FM_SND_L
FM_SND_R
BT_RESETN
7 6 5 4
- 120 -
3 2 1
L
K
J
I
H
G
C427
FM_ANT
100P
C402 C426
DNI DNI
ANT400
4
DUMMY3 F
C428 100p C448 100P 1 3 C450 1.5p
FEED DUMMY2
2
DUMMY1
R409 R408 SDBTPTR3015
DNI DNI
VBAT 2V65_VBT
2V62_VIO
C438
1U
E
C443
1U
BT_LDO_EN
C439 100n
CLK32K
C441 1n
BT_CLK C430
1U
D
6
BT_ANT
32
FM_ANT
16
VAFL
15 11 TP405
VAFR UART_CTS UART_BT_RTS
33 10 TP400
RESET UART_TX UART_BT_RX
8 TP406
UART_RTS UART_BT_CTS
1 9 TP401
GND1 UART_RX UART_BT_TX
C447 5
GND2 M400
1n 7 4
GND3 EWFNLBAXX PCM_SYNC_I2S_WS I2S1_WA0
12 3
GND4 PCM_CLK_I2S_CLK I2S1_CLK
20 38
GND5 PCM_OUT_I2S_OUT I2S1_RX
31 2
GND6 PCM_IN I2S1_TX
39
PGND1
40
PGND2
41
PGND3 C
42
PGND4
B
A
3 2 1
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes