Riso Error A16-525 Jun 2026

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.

Avoid using sharp metal tools (like scissors or screwdrivers) to pluck out the master, as you can easily gouge the rubber rollers. Step 3: Clean the Disposal Rollers and Sensors

: 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

Riso machines generate significant paper and master dust. If the optical sensors tracking the disposal mechanism are blocked by dust, the machine cannot verify that the cycle completed. riso error a16-525

In some cases, the machine's internal log may retain the error state even after the physical issue is fixed.

If you have more details about the machine model or additional context about when the error occurs (e.g., during a specific operation), I might be able to provide more targeted advice.

Check the microswitches that detect the home position of the compression plate. If a switch is bent or broken, the machine will never know the cycle finished, triggering the A16-525 code. How to Prevent Future A16-525 Errors If you have tried all the steps above—cleaned

: Use a lint-free cloth lightly dampened with high-percentage isopropyl alcohol. Gently scrub any ink buildup off the black strip. Let it dry completely so it regains its matte appearance.

Locate the master disposal unit (usually adjacent to the print drum area).

负责检测滚筒上是否有版纸的传感器（通常位于卸版单元或滚筒固定位置）如果因油墨附着而变得不灵敏，或发生硬件故障，就会持续向主板发送错误信号。这种情况下，即使滚筒上没有任何版纸，机器也会持续报错A16-525。 In some cases, the machine's internal log may

: The master-on-drum sensor is dirty or blocked by ink/dust, leading it to signal that a master is present when it isn't.

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.

In Riso terminology, signify errors related to the master making, master feed, or master disposal mechanisms.