Canon Adv 5550i - e554-8001

[printajsifajl]

We have a Canon Adv 5550i with Staple Fin-Y1 that's throwing 554-8001. Based on service manual this is the error description. Thing is I don't know excatly where to check cause I don't have schematic for Finisher's electronics just for few of PS and SW but not one in the manual (SW102, m105 etc)

554-8001-02 Safety switch ON error (Finisher-Y1)
Detection Description The Swing Guide Safety Switch is turned ON for 0.3 seconds.
The Front Cover Switch is turned OFF for 0.3 seconds when the Front Cover Sensor is ON.
Remedy STAPLE FIN-Y1/BOOKLET FIN-Y1
[Related parts]
- Harnesses from the Swing Guide Safety Switch (SW102) to the Finisher Controller PCB
- Harnesses from the Stack Tray Shift Motor (M105) to the Finisher Controller PCB
- Swing Guide Safety Switch (SW102)
- Stack Tray Shift Motor (M105)
- Finisher Controller PCB (PCB101)
[Remedy] Check/replace the related harness/cable, connector and parts.
[Reference] When replacing the Finisher Controller PCB, refer to "Adjustment> When Replacing
the Parts" in the Service Manual.

Did anyone of you came across similar issue?

Any help would be appreciated. Thanks

[GG CANON]

I would change the stapler's flat cable

[printajsifajl]

Thing is if I open it, there are so many cables that I don't know which cable is for anything, without schematics. I've never done that on canon finishers.