LG KU580 Service Manual - Page 39
KEY PCB KeyPad Circuit
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3. Technical Brief VDDE_1V8 VDDE_1V8 VDDE_1V8 KEYIN3 R123 51K KEYIN4 R124 51K KEYIN5 R125 51K TP102 SENSE2 TP101 SENSE3 UP LEFT OK DOWN RIGHT KEYOUT3 KEYOUT4 TP103 SENSE0 TP104 SENSE1 Figure 3-1-15. KEY PCB KeyPad Circuit LGE Internal Use Only - 40 - Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes
- 40 -
3. Technical Brief
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc.
All right reserved.
Only for training and service purposes
OK
TP103
R123
51K
VDDE_1V8
VDDE_1V8
RIGHT
DOWN
R125
51K
51K
R124
UP
TP101
VDDE_1V8
LEFT
TP104
TP102
KEYIN5
KEYOUT3
SENSE3
SENSE1
SENSE0
SENSE2
KEYIN4
KEYIN3
KEYOUT4
Figure 3-1-15. KEY PCB KeyPad Circuit