Riso Error A16-525 //free\\ -

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 to clear the machine's state:

: Some users find success by placing a small piece of matte black gaffer tape over the strip to improve light absorption. 3. Reset and Service Mode riso error a16-525

If the error persists on a clean drum, it is likely an optical detection issue.

: If the drum's "Position-A" is slightly off, the sensor may look at the wrong part of the drum (like the metal surface) instead of the black absorber strip. Troubleshooting and Fixes 1. Immediate Physical Check First, physically remove the drum and verify there

Riso rz300ep: error a16-525 - Конференция StartCopy

: There is a small black velvet strip on the drum meant to absorb sensor light. If this strip is worn, dusty, or missing, the sensor detects reflection from the metal drum instead. The "Sharpie Trick" (For False Errors) If physical

: Wipe the small black velvet strip (usually near the clamp) with a dry cloth to remove paper dust.