Riso Error A16-525 !!top!! -

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

: 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.

Riso rz300ep: error a16-525 - Конференция StartCopy riso error a16-525

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

: 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 If the error persists on a clean drum,

: If using an aftermarket screen, use a black permanent marker (Sharpie) to darken the entire black strip and the area around it to ensure no light reflects back to the sensor.

: 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 Reset and Service Mode : If using an

: Non-original "generic" silkscreens often use white plastic mesh. The sensor's light reflects off this mesh, tricking the machine into thinking a master is still attached.