!link! | Riso Error A16-525

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

Riso rz300ep: error a16-525 - Конференция StartCopy

: 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. riso error a16-525

: 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.

: 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 If the error persists on a clean drum,

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 : There is a small black velvet strip

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