Riso Error A16-525 Hot! -

This error is common with generic replacement screens where the light-absorbing strip is thinner than the original part.

This specific error is not a simple paper jam or an out-of-ink warning. It is a hardware-level stoppage related to the machine’s critical paper transport and registration system. In plain terms, indicates a Timing Mismatch: Paper Position Sensor (PF Register Sensor) abnormality. riso error a16-525

If you are seeing on your Risograph, the machine is essentially stuck "waiting for the master to be removed" from the print cylinder . This usually happens when the sensor detects a master still on the drum, even if you’ve already peeled it off. Why it happens This error is common with generic replacement screens