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LG KG270 Service Manual page 90
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:
Service manual
(125 pages)
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Manual
(113 pages)
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7. CIRCUIT DIAGRAM
1
2
3
4
A
VBAT
(NOT MOUNTED)
2V8_VMEM_S
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
0.1u
G5
C5
VCCS
A20
2V8_VMEM_S
TP300
F2
_OE
R311
NA
G8
A5
VSS1
_WE
E2
A3
VSS2
_LB
2V8_VIO
B3
_UB
C8
F1
RFU0
_CE1F
R315
NA
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
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
2V8_RADIO
R325
NA
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
C333
0.1u
R330
20K
13
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
NO1
COM2
AUXOP_FML
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
0.1u
2.2K
C318
C319
R320
10u
NA
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
2.2K
39p
10u
R304
C306
0.1u
VINNORP
OB4-15L42-C33L
100ohm
C308
C307
2
0.1u
39p
1
R307
C309
0.1u
MIC300
VINNORN
100ohm
R309
2.2K
EAR_MIC
I/O CONNECTOR
FM_ANT
VBAT
L300
CN301
270nH
C322
VCHARGE
1608
10p
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
9
8 : JACK_D
2V8_VIO
10
9,10 : BATT
11
RPWRON
11 : R/ON
R324
12
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.
A
B
C
D
E
F
C
D
E
Sheet/
Sheets
3/4
LG Electronics Inc.
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