Part III Appendix
Description of Self-Test Items 249
Troubleshooting suggestion
If the brightness of the LEDs does not change, replace the control panel.
2.23 Z0801 Parameter Board I2C Communication
Test
Upper-level test item
Communication Test Between PC Module and MF FPGA
Test content
Read data on the LCD through the I2C bus. Judge whether it is not 0 or not F, and then parse the
LCD model, panel serial number, and LCD version.
Test failure analysis
If the test result is Error, the drive malfunctions.
If the test result is FAIL, the connection between the multifunctional FPGA and the parameter
board is abnormal.