Riso Error A16-525 Here

If physical cleaning doesn't work, you may need to clear the machine's state:

: The machine uses an optical sensor to detect masters. If the sensor is dirty or blocked, it may falsely report a master is present. riso error a16-525

First, physically remove the drum and verify there is no master attached. Check the for jams or broken transfer belts, which can prevent the master from leaving the drum area. 2. The "Sharpie Trick" (For False Errors) If physical cleaning doesn't work, you may need