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Troubleshooting
4-1-3 TOUCH PAD Does Not Work
Symptom
Key press input malfunction or failure
Check if FPCB is defective.
Major Checklist
1 Check if 2.8V is output from C810.
2 Check if the TSP is functioning normally.
TOUCH PAD Does Not Work
Is TOUCH PAD supply voltage a normally?
C810: 2.8V
Is the HOLD SWITCH in the
HOLD OFF position?
Is TOUCH KEY reaction?
Is the TOUCH PAD malfunctioning?
Check if there is a sufficient gap be-
tween the touch pad and the LCD.
Recheck after replacing the
touch pad (single part).
4-6
1
Yes
Refer to wave pattern
image of Table 4-3.
Yes
Yes
Yes
No
Defective the power terminal.
No
Check the top of the unit to see if it is
Disassemble the unit and check if
No
If the TOUCH is poor, replace the
Check the power terminal.
set to HOLD SW ON.
2
TOUCH FPCB is defective.
TOUCH PAD.
Samsung Electronics
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