Riso Error A16-525 -

The Riso error code A16-525 indicates the machine is "Waiting for the master to be removed" from the print cylinder (drum). This error typically occurs when the printer's sensor fails to detect that a master has been successfully ejected into the disposal box. Common Causes

For a visual walkthrough of clearing this specific error on models like the Riso CV 3230, you can follow this guide: Riso 3230 A16 525 error resolve Creator Ratikanta YouTube• Mar 30, 2023

Damaged Light Absorber Strip: 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 error a16-525

Power Cycle: Sometimes, simply turning off the machine, waiting for a few minutes, and then turning it back on can resolve transient errors.

Conclusion

Monitor Toner or Ink Levels: Keep an eye on toner or ink levels and refill or replace them before they run out completely. Low levels can lead to print quality issues and errors.

Drum Angle Adjustment: If the drum isn't stopping at the exact right angle, the sensor may be looking at the metal body instead of the velvet strip. In Test Mode, Simulation 941 (Position-A adjustment) or Simulation 942 can be used to tweak the drum angle. The Riso error code A16-525 indicates the machine

What the machine thinks: “I sent the paper. I waited for the sensor to trigger. The sensor did not trigger within the allowed window. Either the paper didn’t arrive, the sensor is lying, or the roller is slipping.”