LG LG511C Service Manual page 100

LG511C
LN510
1
2 3
Is there any pulse when you press touch key ?
LG Electronics Inc.
Checking Flow
Start
:
Make sure that the trouble is about mechanical thing at first
Check the Voltage of R2019
whether it is 2.8V
YES
Check the Signal at R2018, R2019
YES
Touch key will work properly
2
Check the signal CON104
X+,X-,Y+Y-, is there any pulse
When you press touch ?
YES
Check the contact state
of the FPCB connector
NO
Touch key will work properly
Checking Flow
NO
NO
NO
YES
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Replace U3005
2
Replace TOUCH PANNEL
Replace the BOARD
.