Keypad Interface - LG -C300 Service Manual

3.11 Keypad Interface

KEY_COL0
KEY_COL1
KEY_COL2
KEY_COL3
KEY_COL4
KEY_COL5
KEY_ROW0
KEY_ROW1
KEY_ROW2
KEY_ROW3
KEY_ROW4
KEY_ROW5
KEY_ROW6
KEY_ROW7
Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
CN401
R416 100ohms
1
R428 100ohms
2
R429 100ohms
3
4
VA417 VA419
VA418
KB437
KB436 KB435
Q W E
KB422 KB423 KB424
P
O A
KB443
KB440 KB439
K
J L
KB412 KB413 KB414
V
B
N
KB411 KB410 KB409
@ ,(COMMA)
SPACE
KB445 KB407
LEFT
OK
Figure 3-11-1 MAIN KEY STRUCTURE
Figure 3-11-1 MAIN KEY STRUCTURE
3. TECHNICAL BRIEF
POWER ON
VRTC
KB101
END_KEY
C146
2.2u
KEY_ROW6
KEY_ROW7
KEY_COL5
KB430 KB434 KB433
Y
R
T
KB425 KB426 KB427
D
S
F
KB444 KB421 KB441
Z
SHIFT
BACK
KB417
KB415 KB416
ENTER
?(QUES)
M
KB438 KB408
KB403
SYM
.(PRIOD)
LEFT SOFT
KB406 KB405 KB404
DOWN
UP
RIGHT
- 51 -
3. TECHNICAL BRIEF
R118
PWRON
100
R117
D101
100K
KB432 KB431
I
U
KB428 KB429
G H
KB442 KB420
X
C
KB418 KB419
LOCK MESSAGE
KB402 KB401
RIGHT SOFT SEND
LGE Internal Use Only