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LGE Internal Use Only
Copyright © 011 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TECHNICAL BRIEF
3.11 Keypad Interface
CN204
4
3
2
1
VA208
VA209
VA210
470
R232
KB220
470
R229
470
R225
470
R224
KB208
KB203
KB213
KB219
KB205
KB210
KB212
KB217
KB218
KB209
KB214
KB216
KB211
KB207
KB206
KB204
KB201
KB202
KB200
R223
470
470
R233
470
R236
470
R237
470
R239
470
R240
KEY_OUT[0]
KEY_OUT[1]
KEY_OUT[2]
KEY_IN[4]
KEY_IN[3]
KEY_IN[2]
KEY_IN[1]
KEY_IN[0]
KEY_OUT[3]
KEY_IN[5]
2
UP
1
*
9
4
7
0
OK
LEFT
#
6
3
RIGHT
SEND
8
5
MENU
DOWN
BACK
VA207
KB215
VRTC
R226
100
R228
100K
C239
1n
PWRON
Figure 3-11-1 MAIN KEY STRUCTURE