Keypad Interface - LG GM200 Service Manual

3.7 Keypad Interface

K E Y _ R O W 0
K E Y _ R O W 1
K E Y _ R O W 2
K E Y _ R O W 3
K E Y _ R O W 4
K E Y _ R O W 5
K E Y _ C O L 0
K E Y _ C O L 1
K E Y _ C O L 2
K E Y _ C O L 3
K E Y _ C O L 4
V o u l m
R 3 1 1 1 5 0
K E Y _ R O W 0
R 3 1 2 1 5 0
K E Y _ C O L 1
R 3 1 3 1 5 0
K E Y _ C O L 2
LGE Internal Use Only
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
R 1 0 1
1 5 0
1
R 1 0 5
1 5 0
4
R 1 0 6
1 5 0
7
R 1 0 7
1 5 0
S T A R
R 1 1 1
1 5 0
R 1 1 2
1 5 0
Figure 3-7-1 MAIN KEY Circuit
e s d i e k e y
C N 3 0 3
1
2
3 V O L
4 V O L _
P R S B 6 8 . C
E D T Y 0 0 0 8 6 0 6
Figure 3-7-2 Slide KEY Circuit
2 3
5 6
8 9
0 S H A R P
S E N D
_ U P
G N D
D O W N
K E Y _ C O L 0
K E Y _ R O W 0
K E Y _ R O W 5
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3. TECHNICAL BRIEF
O K D O W N
M E N U U P
S E A R C H I R G H T
L E F T
C N 1 0 2
1
2
3
4
LGE Internal Use Only
M P 3
F M R A I D O