For official RISO service manuals and part numbers related to the PF Register Sensor (Part # typically starting with "M" or "K"), contact your regional RISO dealer. Keywords: RISO error A16-525, RISO ComColor error, PF Register Sensor, paper timing mismatch, RISO A16-525 fix, high-speed inkjet troubleshooting.
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 . riso error a16-525
When this error appears, the machine immediately halts all printing operations. Ignoring the cause or failing to reset the system properly can lead to damaged print heads, creased paper, or repeated mechanical failures. For official RISO service manuals and part numbers