LG KG290 Service Manual page 102

7. CIRCUIT DIAGRAM
1 2
MAIN KEYPAD
A
VA304
(50pF)
VA303
(15pF) R309
100ohm
R317 680
KEY_ROW0
R321 680
KEY_ROW1
VA305
R324 680
B
KEY_ROW2
VA306
R329 680
KEY_ROW3
VA331
R333 680
KEY_ROW4
VA332
C
R335 680
KEY_COL0
R336 680
KEY_COL1
R337 680
KEY_COL2
KEY BACKLIGHT
VBAT
D
R344
R345 R346 R347 R348 R349
47 47 47 47
47 47 VA310
NA
VA311
EVL5M02200
LD300 LD301 LD302 LD303 LD304 LD305
LED_KEY
VA312
EVL5M02200
E
1 2
LGIC(42)-A-5505-10:01
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3 4 5
CAMERA VOL_UP VOL_DOWN
IO CONNECTOR
Trace32
PIN
Pin 1
Pin 2
VA302 Pin 7
R617
R310 R618
100ohm 100ohm
100ohm Pin 9
Pin 11
Pin 18
VA301
Pin 24
UKEY_ROW0
1 2 3
I/O CONNECTOR
KEY300 KEY301 KEY302
PIN
USC0
UKEY_ROW1
USC1
4 5 6
USC2
KEY303 KEY304 KEY305
USC4
USC5
USC6
UKEY_ROW2
7 8 9
KEY306 KEY307 KEY308
USB_VBUS
UKEY_ROW3
* 0 #
STAR KEY309 SHARP
R340
12K
USB_DET
UKEY_ROW4
R341
12K
VIBRATOR
VBAT
D301
1SS302-T5L_F_H
MOTOR
R350
20
3
R351
2 Q300
VIBRATOR
KTC4075E
1K
1
3 4 5
6 7
DAI
JTAGEN 2V8_VEXT
_RESET
TMS
TCK
TDI
TDO_1
2V8
DSR
DAI UART RPWRON
CLOCK -
USC0
RX RXD
TX TXD
- RTS/CTS(PC)
- CTS/RTS(PC) R322 NA
USC6
R323 47
RESET - USC1
R325 47
USC2
R326 47
USC3
R327 47
DEBUG_TX
R328 47
USC5
VCHARGE
R330 47
USC4
R331 47
DEBUG_RX
R339
12K
BATT_TEMP
D300
CHG_DET
6 1
USBDP
C309 R342 C310
5 2
12K
NA NA VUSB
4 3
USBDM
PACUSB-U3R
USB PATH SELECTION
VUSB
U300
C301
SLAS4717EPMTR2G
1u
1
VCC
2
MULTI_USB+ NO1 COM2
3
USBDP COM1
R334 1.5K 4
USB_PATH_SEL IN1
5
USB+ NC1
USB_PATH_SEL
L AD6721
H AIT813G
6 7
- 103 -
8 9 10
2V8_VEXT
R300
NA
CN301
C300
VA300 ENRY0003501
EVL5M02200
GND2 GND1
OUT IN 4.7u
FL300
ICVFP10181E301FR
R318 47
R319 47
R320 47
FB300
R332 0
C308
VA309
VA307
1u NA
EVL5M02200
SLIDE SW
2V8_VMEM
10
NO2 MULTI_USB- R343
100K
9
USBDM
8
IN2
7
C313
NC2 USB- C311
C312
1u
1u EVL5M02200
6
U301
GND
A3212EELLT-T
LGMC
LGE Internal Use Only
A
A
25
26
29
31
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
32
30
27
28
C
SLIDE
D
C314
39p
LG Electronics Inc.