Riso Error - A16-525

Locate the rubber disposal rollers and the small glass-faced photo-sensors near the disposal entryway.

For a visual walkthrough of clearing this specific error on machines like the CV 3230, watch this troubleshooting guide: Riso 3230 A16 525 error resolve Creator Ratikanta YouTube• Mar 30, 2023 Advanced Troubleshooting

If basic cleaning doesn't work, technical users on Reddit and Facebook suggest:

The pressroom hummed like a tired hive. Marta loved the rhythm — the low thump of paper, the scent of ink, the way time folded into identical pages. The Risograph, a cantankerous old machine with more history than manuals, had been her confessor for years. It printed zines, flyers, protest posters, the little chapbooks that stitched the neighborhood together.

She ran a cleaning cycle and set the lighter, fresher paper back in. The machine coughed, spat, and then sighed into life. The run restarted, pages marching out in neat columns. For the rest of the afternoon, whenever the Risograph hiccupped, Marta would glance at its feeder as if watching a sleeping animal. Sometimes she’d find a scrap — a receipt, a dried bus ticket, a grocery coupon with a child's handwriting — and she would tuck it into a small cardboard box on her workbench. riso error a16-525

Did the error happen after changing a master roll, or during a long print run?

: Check the machine's maintenance requirements. Ensure that all necessary maintenance has been performed and that consumables (like ink or master units) are properly installed and not depleted.

Inspect the small rubber drive belt connected to the disposal motor. If it is cracked, stretched, or slipping, it will cause a timeout error. Replace it if necessary.

Remove the master disposal box, pull the drum out, turn the machine off for 60 seconds, and turn it back on. Locate the rubber disposal rollers and the small

"I was dead in the water when my Riso printer threw the A16-525 code right before a big deadline. I called [Technician Name/Company Name] and they were fantastic. They knew exactly what the code meant (drum motor lock) and had the parts to fix it same-day. If you see this error, don't try to force it—call a pro. Highly recommend their service!"

If you have tried all the steps above—cleaned the contacts, used a brand new genuine ink cartridge, and reseated the drum—and the A16-525 error persists, the issue is likely a hardware failure.

If the error persists after cleaning, the sensor may be faulty and require replacement.

is intimidating because it halts production instantly. However, it is rarely a catastrophic failure. In 80% of cases, the solution is a simple cleaning of the PF Register Sensor and a basic roller wipe-down . The Risograph, a cantankerous old machine with more

If the velvet is dusty, worn, or scrunched up, the sensor sees a reflection from the metal/mesh underneath and thinks a master is present.

Less common, but more severe. If the PF (Paper Feed) motor is failing to maintain constant speed, or if the wiring harness to the register sensor has a micro-fracture, intermittent timing errors will occur.

Over time, wet ink or oily residue bleeds onto this black strip. The reflective ink tricks the optical sensor into thinking a light-colored master sheet is still covering it.

如果以上所有步骤均无效，可以尝试将当前使用的版纸/蜡纸更换回原装RISO品牌，并再次测试。