Riso Error A16-525 [new] Jun 2026
Error indicates that the printing cylinder (drum) for a specific color (usually Black, Cyan, Magenta, or Yellow) has failed to return to or find its home position within the expected time frame during operation or initialization.
If the screen cloth on the drum has been replaced with an aftermarket version, it might not be seated properly, or it might be triggering the sensor incorrectly.
: Regularly maintain your Riso duplicator according to the manufacturer's guidelines. This includes cleaning the machine, checking for wear and tear, and replacing parts as needed.
If the machine says the master is there but it isn’t, the sensor might be faulty or dirty. riso error a16-525
Locate the rubber disposal rollers and the small glass-faced photo-sensors near the disposal entryway.
If the drum is clean and the error persists, a dirty or obstructed sensor is the next likely culprit.
: Use a soft, dry cloth to gently clean the sensors located in the middle of the drum area. system reset Error indicates that the printing cylinder (drum) for
Carefully lift the clamp or lift the edge of the master paper. Pull it gently away from the ink screen to avoid tearing the delicate mesh.
Once you have cleared the error, you want it to stay away. Implement these three maintenance habits:
: Inspect the little white wheels and the clamp plate. If they are broken, missing, or dirty, the machine may fail to properly cycle the master removal. Test Mode Adjustments This includes cleaning the machine, checking for wear
By following these steps, you should be able to resolve the and continue with your print job. If the issue persists, the print-drum sensor may need to be replaced by a technician.
Open the front door of the Risograph and carefully pull out the active print cylinder (drum).
The Riso error A16-525 can be caused by several factors, including:
Look inside the drum cavity of the machine (where the drum slides in). Locate the optical sensor lenses positioned just above where the top of the drum rests. Use a dry, clean cotton swab or a blast of compressed air to remove any built-up dust or grime. 4. Step 3: Advanced Troubleshooting Techniques
Follow these steps in order to resolve the A16-525 error, starting with the easiest solutions.