Service manual

3. DIAGNOSTIC CHECK
Service Manual BSM-4100 3.13
Touch Key Check
This item checks the touch key operation and positioning. When you start the
check, the screen changes to the touch key check screen, and indicates the position
where you touched. When you touch the screen and move your finger or touch
pen, the target mark traces your position.
If the position of the target mark and the touched position do not match, calibrate
the touch screen.
If you execute the touch key calibration and the position is still incorrect, the
connection board, touch screen, or MAIN board will be faulty.
Procedure to Start the Touch Key Check or to Exit the Touch Key Check Program
1. To check the touch key, touch the “TOUCH KEY CHECK” key.
2. On the above screen, confirm that the touched position matches the target
mark on the screen.
3. To return to the DIAGNOSTIC CHECK screen, press the HOME key.