Part III Appendix
Description of Self-Test Items 252
The SM ARM reads the firmware version and compilation time of the secondary screen board
through the UART, to check whether the communication is normal.
Test failure analysis
If the test result is Error, the drive malfunctions.
If the test result is FAIL, the communication between the SM ARM and the secondary screen 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, check whether the cables are normal. If so, replace the secondary
screen control board. If the problem persists, replace the main board.
2.28 Z0806 Optical Sensor Test
Upper-level test item
Communication Test Between PC Module and MF FPGA
Test content
The following dialog box appears during the test. Ensure that the equipment is not in a dark room
environment during the self-test. Otherwise, the test requirements are not met.
Completely cover the optical sensor at the top of the screen with your hand for at least 5s. If the
value displayed on the screen becomes smaller, take off your hand from the optical sensor and
check whether the value displayed on the screen becomes greater. If the preceding procedures are
normal, click Yes, I Can; otherwise, click No, I Can't. See the following figure.
Test failure analysis
If the test result is Error, the drive malfunctions.
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