LG KG270 Service Manual page 90

7. CIRCUIT DIAGRAM
1 2 3 4
A
VBAT 2V8_VMEM_S
(NOT MOUNTED)
U300 BH28FB1WHFV
1 5
STBY NC
2 6
GND BGND
3 4
VIN VOUT MEMORY
C300 C301
NA NA
U301 S71GL032A40BAW0F
E1
A0
G2 D1
B DATA00 DQ0 A1
E3 C1
DATA01 DQ1 A2
H3 B1
DATA02 DQ2 A3
F4 D2
DATA03 DQ3 A4
F5 C2
DATA04 DQ4 A5
H6 B2
DATA05 DQ5 A6
E6 A2
DATA06 DQ6 A7
G7 A6
DATA07 DQ7 A8
H2 C6
DATA08 DQ8 A9
F3 D6
DATA09 DQ9 A10
G3 A7
DATA10 DQ10 A11
H4 B7
DATA11 DQ11 A12
G6 C7
DATA12 DQ12 A13
F6 D7
DATA13 DQ13 A14
2V8_VMEM H7 B8
DATA14 DQ14 A15
F7 E8
DATA15 DQ15 A16
D3
C A17
G4 C3
VCCF A18
B6
C315
A19
R310 0 G5 C5
0.1u
VCCS A20
2V8_VMEM_S TP300
F2
_OE
R311 NA
G8 A5
VSS1 _WE
E2 A3
VSS2 _LB
2V8_VIO B3
_UB
C8 F1
R315 NA RFU0 _CE1F
D8 G1
RFU1 _CE1S
E7 B5
RFU2 CE2S
F8 C4
RFU3 RY__BY _RY_BY
C316
H5 A4
RFU4 WP_ACC
0.1u
B4
_RSTF
D
E
F
1
C R328 0
C331 100p 2
FM_ANT
3
4
5
FM_RST
FM_RST
2V8_RADIO
D
FM_SCL
FM_SDA
RADIO_DETECT
R339
VBAT
27K
U304 BH28FB1WHFV
E
1
RADIO_EN
STBY
2
GND BGND
3
VIN VOUT
R343
100K
C341
1u
RADIO_DETECT
(10V,K,X5R)
RADIO 27K
NO RADIO 2.7K
F
1 2 3 4
LG(42)-A-5505-10:01
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
5 6 7 8
SIM_CONNECTOR
2V85_VSIM
2V85_VSIM
ADD01
ADD02
2V85_VSIM
ADD03
ADD04
ADD05
J300
ADD06
4 1
ADD07 GND VCC
5 2
ADD08 VPP RST
6 3
ADD09 SIM_DATA I_O CLK
8 7
ADD10 GND2 GND1
ADD11 C310 C311 C312
ADD12 22p 0.1u
22p
ADD13
ADD14
ADD15
ADD16
ADD17
ADD18
ADD19
2V8_VMEM
ADD20
2V8_VMEM
ADD21
_OE
_WR
ADD00
BHE_N
CS0n
CS1n
REMOTE POWER ON
RPWRON
RPWRON
END_KEY
RADIO
2V8_VIO
R325 NA 2V8_RADIO
2V8_RADIO
R326 39K
C329 C330
1u 2V8_RADIO 1u
U303 LM4809LD
7 8
VDD VOUT1
15
NC1 GND3
14 C332 0.1u R329 20K 1
U302
FMIP LOUT VIN1
13 C333 0.1u R330 20K 6
RFGND ROUT VOUT2
SI4702-B16
12 5
GND1 GND2 VIN2
11
_RST VD
2 3
BYPASS GND
4 9
C335 RADIO_AMP_SHDN _SHDN BGND
22n
2V8_RADIO
R333 39K
R335 C338
R334
100K 0.1u
10K
2V8_VIO
R338
FM_32K
47
C340
U305
0.1u
NLAS5223BMNR2G
1 10
RADIO_SPK_L
VCC NO2
2V8_RADIO
2 9
RADIO_SPK_R AUXOP_FML
NO1 COM2
R340
3 8
AUXOP_FMR COM1 IN2 FOR RADIO
5 NA
NC R342
6
4 7
FOR RADIO NA IN1 NC2
4
5 6
EPPA1
NC1 GND
C342 HEADSET_RADIO_SEL
1u
R345
100K
5 6 7 8
9 10 11 12
VIBRATOR
VBAT VBAT
C302
27p
(50V,J,NP0)
CN300
1
2
C305
R305
27p
(1608)
10
SIM_RST
SIM_CLK
R306
Q300
VIBRATOR
2SC5585
1K
VMIC
C317
R318
R317 47
PWRON
AUXIN
R319 0
2.2K
0.1u
C318 C319
R320
NA 10u
100K
C320 0.1u
AUXIP
2V8_VIO 2V8_VIO
C323 10u
AUXOP_FML
C324 10u
AUXOP_FMR
TXD
RXD
R327 0
RADIO_SPK_L
R331 0
RADIO_SPK_R
2V8_VIO
R341
330K
EPPA1
R344
240K
Iss. Notice No. Date Name
9
- 91 -
13 14 15 16
VMIC
MAIN_MIC
R300
1K
R301
C303 C304
39p 10u
2.2K
R304
C306 0.1u
VINNORP
OB4-15L42-C33L
100ohm
C307 C308
2
0.1u 1
39p
R307
C309 0.1u MIC300
VINNORN
100ohm
R309
2.2K
EAR_MIC
I/O CONNECTOR
FM_ANT
VBAT
L300
CN301
270nH C322
VCHARGE 10p
1608
21
19
FOR RADIO
FOR RADIO
1
FB300 1800 2
2 : AUDIO
3
FB301 1800 4
4 : EAR_L
FB302 1800
5
5 : EAR_R
6
6 : TXD
7
7 : RXD
8
HS_DET
8 : JACK_D
9
2V8_VIO
10
9,10 : BATT
11
RPWRON
12 11 : R/ON
R324
100K 13
12,13 : CHG
14
DSR
15
16
C327 C328
17
10u 56p
18
(2012)
(10V,Z,Y5V) (50V,J,NP0) 20
22
HSEJ-18S04-25R
VBAT
R332 0 3
BATT_TEMP
2
1
CN302
C336 C337
3p 18p
(50V,J,NP0)
(50V,C,NP0)
(TOL:0.25P)
Section Date Sign & Name
GB3_RADIO
11/16
MODEL
SANG-YEON.LEE
Designer SPFY0144601
2006
Checked
2006
DRAWING
RADIO,MEMORY,AUDIO,I/O
NAME
Approved
2006
DRAWING
VER-1.1
LG Electronics Inc.
NO.
LGE Internal Use Only
A
B
C
D
E
F
C
D
E
Sheet/
Sheets
3/4
LG Electronics Inc.