LG KG270 Service Manual page 89

7. CIRCUIT DIAGRAM
1 2
A
KEY MATRIX
END_KEY
1
SW201
R201
KEY_OUT1
680
C205
NA SW206
4
R203
KEY_OUT2
680
C206
NA SW211
7
R204
KEY_OUT3
680
C207
NA SW216 *
R209
KEY_OUT4
680
C215 C216
NA NA
R211 680
KEY_IN0
R212 680
KEY_IN1
R213 680
KEY_IN2
R214 680
KEY_IN3
R215 680
KEY_IN4
KEY BACKLIGHT
D
(10V,K,X5R)
R222 1K
KEY_BACKLIGHT
E
1 2
LGIC(42)-A-5505-10:01
3 4 5
2V0_VRTC
END
SW200
2 3
LEFT
SW202 SW203 SW204 SW205 MENU
SW207 SW208 SW209 SW210
5 6
UP
SEL
SW212 SW213 SW214 SW215
8 9
RIGHT
SEND
SW217 0 SW218 # SW219
DOWN
C217 C218 C219 C220
NA NA NA NA
VBAT
(10V,K,X5R)
2SC5585
Q200
R223
10K
Iss.
3 4 5
6 7 8
VBAT CHARGE PUMP
U200 AAT3157ITP-T1
5 10
IN C1+
C200
1u
9
C1-
7
C2+ C201
8
MLED CP
1u
6
C2-
11
W_LED_DRV EN_SET
1
D1 MLED1
2
D2 MLED2
3
D3
R202 C202
4 12
GND NC
100K 27p
C203 C204
27p 27p
CN200
1
3
MTPG
R205 47
5
LCD_RESET
R207 47 7
SSC0_CLK
9
MLED
11
MLED2
C208 C209 C210
13
NA 27p 27p
R210
100K
IMSA-9671S-13Y902
(ENQY0013801)
Section Date
11/16
Designer
2006
Checked
Approved
Notice No. Date Name
LG Electronics Inc.
- 90 -
9 10
MAKER ID Voltage
SII 1.9V
HIGH
SHARP LOW 0V
GP 150Kohm pull up 0.9V
2V8_VIO
2
MTPD
4
R206 47
6
CS3
R208 47
8
SSC0_MTSR
10
MLED1
12
C211 C212 C213 C214
LCD_ID
14
27p 27p NA NA
15
C221
1u
Sign & Name Sheet/
GB3_RADIO
Sheets
MODEL
HYUN-OK.LEE
2/4
DRAWING
AUDIO,LCD,KEY
NAME
DRAWING
REV-1.1
NO.
LG Electronics Inc.
A
B
C
D