Canon E500 — Finisher communication error

What this error means

The copier lost contact with its finisher (the stapler/sorter unit). Very often a docking problem: the finisher isn't fully latched to the main unit, or a cable worked loose.

Symptoms

• Error after the finisher was bumped or moved
• Finishing functions dead, copying fine

Try this first (safe DIY steps)

1. Power off; undock and firmly re-dock the finisher until it latches
2. Check the connecting cable
3. Power on

Safety: power off before any physical intervention. Never bypass covers or interlocks — fuser areas run hot enough to burn.

When to call a technician

If re-docking doesn't fix it — finisher controller service.