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MX8550
4.3.9 Touch key
R131 TOUCH
DATA
R129 TOUCH
CLOCK
R130 TOUCH
ACK
Upper window case
: Conductive gasket which gives connection between upper window
and sensing patterns of key PCB
LG Electronics Inc.
Circuit Diagram
Circuit Diagram
Test point
Test point
U106
Mechanical Figure for Touch function
Mechanical Figure for Touch function
Well-
positioned
defect
Sensing pattern of
Mismatch
key PCB
C138
+2.6V_TOUCH
R129
R131
R130
C138
- 129/148
-
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