Circuit Diagram - LG KG270 Service Manual

7. CIRCUIT DIAGRAM

1 2 3
A
3
32.768KHZ CRYSTAL
B
X100
4 3
32KIN
1 2
32KOUT
MC-146_12_5PF
32.768KHz
C
D
ON BOARD ARM9 JTAG & ETM INTERFACE
(NOT MOUNTED)
E
(FOR SW DEBUGGING / NOT MOUNTED)
CN102
R113 R114
NA NA
G1 G2
(R110 will be changed to NA
1 30
for mass production)
2 29
3 28
4 27
TRSTn
5 26
TDI
6 25
TMS
7 24
TCK
8 23
9 22
TDO
10 21
EXTRSTn
11 20
TRIG_IN
F
12 19
TRIG_OUT
13 18
14 17
15 16
R117
G3 G4
NA
C
VBAT
UA100
UART PORT
3G 2.5G
1
GND GND
2
RX RX RXD
3
TX TXD
TX
4
UFLS
NC1
5
ON_SW ON_SW RPWRON
6
D VBAT VBAT
7
PWR NC2
8
URXD NC3
9
UTXD NC4
10
DSR
11
RTS
12
CTS
SC100
E
1 27
2 26
3 25
4 24
5 23
6 22
7 21
8 20
9 19
F
1 2 3
LG(42)-A-5505-10:01
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4 5 6 7
3V2_VBUF
MODEL
R196
KG278, MG160b, KG275
(1608)
R197 KG270
R198 MG160a
2V0_VRTC
R199
R196 R197 R198 R199 C113
L102
1u
18nH
0 NA NA NA
C8
KP0
D6
KEY_OUT1 KP1
D7
KEY_OUT2 KP2
C7
KEY_OUT3 KP3
D9
KEY_OUT4 KP4
C6
KEY_IN0 KP5
C9
KEY_IN1 KP6
D8
KEY_IN2 KP7
F9
KEY_IN3 KP8
F8
KEY_IN4 KP9
RXD G7
RXD RXD
TXD H7
TXD TXD
H8
HS_DET RTS_N
DSR G8
DSR CTS_N
J6
SSC0_CLK SSC0_CLK
K6
CHG_EN_TEST SSC0_MRST
G6
SSC0_MTSR SSC0_MTSR (FOR LCD SPI INTERFACE)
H6
LCD_RESET DISP_REST
H9
(FOR FM RADIO) FM_SCL SCL
H10
(FOR FM RADIO) FM_SDA SDA
R8
SIM_DATA CCIO
M9
(FOR FM RADIO)
FM_INT CCVZ_N
P7
SIM_CLK CCLK
R10
SIM_RST CCRST
N8
LOUD_SPK_EN CCIN
2V0_VRTC
P8
TDO TDO
M10
TDI TDI
P9
TMS TMS
R9
TCK TCK
K9
R115 TRSTn TRST_N PMB7880
B5
100K
TRIG_OUT TRIG_OUT
C5
TRIG_IN
TRIG_IN U102
CHG_EN F7
NMI_N (FOR CHARGING IC)
N6
MON1
MON100 N9
(FOR 2.8V VMEM SELECTION) MON2
R4
DATA00 D0
P1
DATA01 D1
P2
DATA02 D2
N2
DATA03 D3
L1
DATA04 D4
M2
DATA05 D5
K1
DATA06 D6
J2
DATA07 D7
P3
DATA08 D8
R2
DATA09 D9
M1
DATA10 D10
N1
DATA11 D11
L2
DATA12 D12
K2
DATA13 D13
J1
DATA14 D14
M4
DATA15 D15
C2
ADD00 A0
D5
ADD01 A1
F4
ADD02 A2
E4
ADD03 A3
D4
ADD04 A4
G4
ADD05 A5
D2
ADD06 A6
H4
ADD07 A7
C1
ADD08 A8
F1
ADD09 A9
F2
ADD10 A10
1V5_VRF0 VD1
VRF2
VRF1
VBAT VBAT
VBAT1 VBAT2 GND1 GND2
4 5 6 7
8 9 10 11
VRF1
C111
R100
1u
6.8K
BAT100
VBAT
C115
(1608)
2.2u
(16V,K,X5R)
D12
REXT
A9
XOX
A8
XO
X101
A13 NX3225SA
TX2 DCS_PCS_OUT SPK_N
A14
TX1 GSM_OUT 2V8_VIO
E15
RX34 DCS_RXP SPK_P
D15
RX34X DCS_RXN
C15
RX12 GSM_RXP
B15
M0,2 : ~1.92V R107
RX12X GSM_RXN ( NX3225SA(W-188-34-7) RADIO_SPK_L
M7,9 : ~0.96V NA
N10
(30uA) M9 RADIO_DETECT (FOR FM RADIO) R109
R14
(VOLTAGE SENSING) M0 LCD_ID LOUD_SPK_EN
R11
(30uA) M7 DEFAULT_BANDSEL 68K
P10
(90uA) M2 BATT_TEMP
P13
R111 R112
PAOUT1 TX_RAMP
100K 47K
K14 VMIC
LOUD2 SPK_N
L15
LOUD1 SPK_P
P12
VMIC
P11
MICP2 AUXIP
R12 C124
MICN2 AUXIN
P15 1000p
MICP1 VINNORP
R13
MICN1 VINNORN
M14
EPPA1 EPPA1
M12
EPP1 REC_P
N15
EPN1 REC_N
B2
T2IN HEADSET_RADIO_SEL (FOR FM RADIO)
B1
VIB_CONTROL VIBRATOR
B3
BACK_LIGHT KEY_BACKLIGHT
A2
W_LED_DRV W_LED_DRV
A4
CC00IO RADIO_EN
A3 (FOR FM RADIO)
RSTOUT_N FM_RST (FOR FM RADIO)
P5
RESET_N _RESET
M7 R116 0
SAFE_RES
N7
SWITCH_ON PWRON
P6
OSC32K 32KOUT
R5
F32K 32KIN
B4
CLKOUT CHG_STATUS
CHARGE_DETECT
B7
T_OUT8 BS
A5
T_OUT4 FM_32K (FOR FM RADIO)
A6
T_OUT3 VC2
B6
T_OUT2 VC1 CHG_STATUS
A7
T_OUT0 TXON_PA
N5
OE_N _OE
M6
ADV_N
E3 BHE_N
BHE_N BHE_N
_WR
E2
WR_N _WR
R3
RD_N
M5
CS3_N CS3
K3
CS1_N CS1n
P4 CS100
CS0_N CS0n
G1
A22
E1
A21 ADD21
H1
A20 ADD20
D1
A19 ADD19
F3
A18 ADD18
L3
A17 ADD17
K4
A16 ADD16
J4
A15 ADD15
H3
A14 ADD14
J3
A13 ADD13
H2
A12 ADD12
G2
A11 ADD11
E_FUSE
Iss. Notice No. Date Name
8 9
- 89 -
12 13 14 15
RECEIVER
CN100
L100 22nH
1
REC_P
L101 22nH
2
C100
39p
11*07*3T receiver
REC_N
(SURY0013001)
C102 C103
39p 39p
SPEAKER
SPEAKER AMPLIFIER
R102 VBAT
R103
C116 NA
82K
NA
CN101
U100 NCP2890AFCT2G L103 27nH
R104
C117 0.1u A3 C2 1
INP OUTB
L104 27nH
20K
2
A1 A2
INM OUTA
R105
C118 0.1u
C3 B2
20K _SD VM 16pi 3.4T speaker
R106 (SUSY0025801)
C119 0.1u C1 B3
BYPASS VP
20K
C120 D100 D101
C122 C123
1 uF 0.1u 0.1u
(2012)
(10V,K)
Gain : Rf/Rin
CHARGING IC
2V8_VIO
VCHARGE VBAT VCHARGE
R118
NA
U101
R119 1.8K
1 10
VIN VBAT
C125 R120
2 9
1u NA
_FAULT VSEN_TEMP
(10V,K,X5R)
R121
3 8
_STATUS IREF
R122 0
NA CHG_EN_TEST
4 7
C126
TIME V2P8
(10V,K,X5R)
R123 NA
1u 5 6
GND EN CHG_EN
C127 11
PGND
0.015u
C128 R124 R125
ISL9201IRZ-T
1u 160K 100K
(1%)
Section Date Sign & Name
GB3_RADIO
11/16
MODEL
SANG-YOEN.LEE
Designer
SPFY0144601
2006
Checked
DRAWING
BB
NAME
Approved
DRAWING
VER-1.1
LG Electronics Inc.
NO.
LGE Internal Use Only
16
A
B
C
D
E
F
C
D
E
Sheet/
Sheets
1/4
LG Electronics Inc.