If standard troubleshooting fails to clear the A16-525 code, the issue may stem from an electronic or mechanical component failure that requires test mode diagnostics. Resetting the Error via Test Mode
Inspect the white plastic wheels or gears on the side of the drum clamp; if one is missing or broken, the clamp may not be seating correctly for the sensor to read it.
The master is properly disposed of, but the machine still displays the error.
If you recently replaced your screen and are getting a false error, the black velvet strip might be too reflective. You can try darkening it with a black Sharpie or applying a small piece of black matte gaffer's tape or washi tape to help the sensor absorb light correctly. riso error a16-525
- If the sensor is clean and the drum is clear, the issue might be mechanical. On some forums, users have reported success by manually rotating the drum's internal gear. - Action: With the machine off and drum removed, check the small black strip on the drum's surface. Is it torn or peeling? If so, it needs to be replaced. If it's intact, an advanced trick is to manually rotate the drum's drive gear from inside the machine's back panel to force it through its cycle and reset the sensor position. This is a more advanced step and may be best left to a service technician if you are not confident .
Check the print drum for proper alignment and ensure it is not damaged. Consult the machine's manual for instructions on how to check and adjust the drum.
Do you see a inside, or is the path clear? Share public link If standard troubleshooting fails to clear the A16-525
The is a common hardware error code on Risograph digital duplicators—including popular lines like the Riso RZ, EZ, and SF series . It specifically indicates that the machine is waiting for the master stencil to be removed from the print cylinder (drum) , or it detects a master wrap/jam during the master disposal or creation process.
Look closely at the entry point where the master leaves the drum and enters the disposal area.
If the error persists with no master on the drum, the master loading/positioning sensors may be dirty. If you recently replaced your screen and are
The most straightforward cause is a mechanical failure during the master disposal cycle. If the master clamp fails to open, or if the disposal rollers fail to grip and pull the used master sheet into the disposal box, the master physically stays on the drum. This is often accompanied by an error (master disposal jam). 2. Dirty or Damaged Master Sensor
This error code indicates that .
Rotate the drum manually to access the gripper plate (the metal bar that clamps the edge of the master).
Word spread: Marta’s Risograph became, in the neighborhood’s whispered myth, a sorter of lost things. People began leaving small objects in their submissions — a pressed leaf, a ticket stub, a photograph — not because they believed in the machine’s ghost, but because a place that once misplaced something might just return it with new context. The A16-525 light kept blinking sometimes, a punctuation of small mysteries. Marta kept the box of found scraps on her bench like a shrine.
: Pull out the print drum, manually remove any master sheet present, and re-insert the drum. Trigger Condition : The print-drum set sensor transitions from while the machine believes a master is still attached. 2. Common Causes for "False" Errors