SHARP TROUBLE & ERROR CODES AR-651, AR-810 - OlsonBros

[Procedure 2]
Is second feed motor (M8) rotating in reverse at the fixed timing?
YES
NO
Replace second feed motor or finisher controller PC board.
Is the shutter securely attached to the shutter upper/lower bars?
YES
NO
Attach it securely.
Turn feed roller-2 in reverse by hand. Do the shutter upper/lower bars move up and down?
YES
NO
Fix the mechanism including the shutter upper/lower bars and gears of the feed
roller-2.
Is the shutter open sensor (PI5) working normally?
YES
NO
Replace the sensor.
Replace the finisher controller PC board.
[Procedure 3]
Check the safety zone switch (MS3). Is the switch working normally?
YES
NO
Replace the switch.
Is the safety zone switch (MS3) correctly pressed?
YES
NO
Fix the mechanism.
Is the shutter closed detecting switch (MS4) working normally?
YES
NO
Replace the switch.
Is the shutter closed detecting switch (MS4) correctly pressed?
YES
NO
Fix the mechanism.
Replace the finisher controller PC board.
AR-651/810 TROUBLE SHOOTING 5 - 80