Hitachi IJ PH Service Manual page 189

6.5.10 Coordinate misalignment of the touch panel
*) Key input on the touch panel is possible (key input sound is heard),
but shows the state that is out of a coordinate.
Coordinate misalignment of the touch panel
Is coordinate adjustment possible?
No
Is there the key input sound?
Yes
In a power supply OFF state,
disconnect and reconnect the CN5 of
EZJ124 board.
Does the fault recur?
Is the power voltage of
EZJ124board (5V)
4.75V≦VCC≦5.25V?
Test point of VCC is TP11.
（Test pin is not mounted）
No
In a power supply OFF state,
disconnect and reconnect the
CN3 of EZJ93 board and
CN3 of EZJ124 board.
Does the fault recur?
No
Confirm the output voltage
of multiple power supply..
Is the output voltage
4.84V≦VCC≦5.36V?
(Pin No. 1 to 3 of the CN2
on multiple power supply)
No
Replace multiple power
supply.
Yes
No
Yes
No
Yes
Replace the touch panel
Does the
fault recur?
Replace the EZJ124 board.
Yes
Replace the EZJ93 board.
Yes
6-52
Adjust a coordinate.
See 6.5.9 Freeze
of display
Yes
No
Resume the
operation