Here is the technical translation: The machine expects the leading edge of the paper to hit a specific optical sensor (the PF Register Sensor) at a precise moment during the feed cycle. When the CPU compares the actual sensor activation time against the calculated standard value, if the deviation exceeds the allowable range (usually ± a few milliseconds), the system throws .
Using test mode simulation 941 or 959 to adjust the "Position-A" angle so the sensor aligns better with the non-reflective strip.
Use this if you found a PDF or website that helped you solve it.
If the master disposal box is at capacity, the machine may fail to eject the current master, triggering the code.
may need compensation if the sensor is looking at the wrong spot. For example, on certain MZ/RZ models, service parameter
) to slightly adjust the drum angle compensation to help the sensor align with the strip. Screen Issues
To understand A16-525, you need a basic understanding of the RISO ComColor’s paper path. These machines run at speeds up to 150 pages per minute. To achieve that speed, timing is measured in milliseconds.
The first step in troubleshooting any electronic device or machine is to restart it. This simple action can sometimes resolve temporary glitches or errors.







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Here is the technical translation: The machine expects the leading edge of the paper to hit a specific optical sensor (the PF Register Sensor) at a precise moment during the feed cycle. When the CPU compares the actual sensor activation time against the calculated standard value, if the deviation exceeds the allowable range (usually ± a few milliseconds), the system throws .
Using test mode simulation 941 or 959 to adjust the "Position-A" angle so the sensor aligns better with the non-reflective strip.
Use this if you found a PDF or website that helped you solve it.
If the master disposal box is at capacity, the machine may fail to eject the current master, triggering the code.
may need compensation if the sensor is looking at the wrong spot. For example, on certain MZ/RZ models, service parameter
) to slightly adjust the drum angle compensation to help the sensor align with the strip. Screen Issues
To understand A16-525, you need a basic understanding of the RISO ComColor’s paper path. These machines run at speeds up to 150 pages per minute. To achieve that speed, timing is measured in milliseconds.
The first step in troubleshooting any electronic device or machine is to restart it. This simple action can sometimes resolve temporary glitches or errors.
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