What to do if Yongda Hitachi No. 81 fails?

Optoelectronic POSI for re-leveling does not close fault

Investigation items:

1. Optoelectronic Posi body check:

(1) When in the leveling position, the LED on the photoelectric Posi should light up, and when the induction plate is cut in, the LED should turn off.

(2) Confirmation of photoelectric Posi wiring, MIC insertion status, and Cable disconnection confirmation.

(3) If the photoelectric Posi is damaged, replace it.

2. XRLD, XRLU input buffer action check:

Data confirmation of main Micon Address XRLD ($C517), Knife)

※XRLD ($C517) and XRLU ($C507) both operate MODE 22 for observation.

3. Confirm SDCGB PCB power supply, P48V, whether the power supply is normal.