Part III Appendix
Description of Self-Test Items 250
Troubleshooting suggestion
a If the test result is Error, restart the equipment and re-perform the self-test. If the problem
persists, recover the equipment.
b If the test result is FAIL, check whether the cable connections between the parameter board
and the main unit are reliable. If so, replace the parameter board.
2.24 Z0802 Parameter Board Data Check Test
Upper-level test item
Parameter Board I2C Communication Test
Test content
Read the data of the parameter board and calculate the data check. Compare the calculated data
with the stored data.
Test failure analysis
If the test result is Error, the drive malfunctions.
If the test result is FAIL, the data stored by the parameter board is abnormal.
Troubleshooting suggestion
a If the test result is Error, restart the equipment and re-perform the self-test. If the problem
persists, recover the equipment.
b If the test result is FAIL, replace the LCD.
2.25 Z0803 Bright Control Test for the Main
Display
Upper-level test item
Parameter Board Data Check Test
Test content
The following dialog box appears during the test. The program controls the brightness changes of
the main display through the I2C bus. Change the brightness to the lowest, then the highest, and
finally normal. If you can perceive the changes, click Yes, I Can; otherwise, click No, I Can't. Click
Retry to repeat the preceding procedure.
Test failure analysis
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