Repeated error code 012-283 with Library printer

Looking into this error, it's a confirmed finisher fault. The first thing to check is to make sure the finisher door is holding on well, and there are no broken tabs on it; if there aren't any broken tabs, it's likely a sensor fault. On this unit, I don't see an option to add an external finisher like larger units tend to have, so this is almost certainly an internal sensor issue, not an external finisher problem.

If the door is fine, the issue likely lies with the actuator sensor being broken. While I do not have a SM for this unit (as it is hard to find them for Xerox printers), I did find a video that shows what the sensor should approximately look like:

It may be something you can shim to fix, but you will likely need to replace the assembly with this sensor tab. It likely is not a part you can likely find on its own, given its size and the cost of supplying it independently. If it's similar to the video I found, you can probably replace the assembly which holds it and leave the rest be.

This video is for an AltaLink, but this is where I found what it could potentially look like: https://www.youtube.com/watch?v=-nMJlZsM...