Riso Error A16-525 [BEST]

| Step | Action | What to look for | |------|--------|------------------| | 1 | Power cycle the machine completely. | Wait 30 seconds after power off before restarting. | | 2 | Open front cover and check for jammed paper near drum area. | Remove any scraps, especially near sensors on left/right sides. | | 3 | Remove and reseat the error-indicated drum unit. | Pull drum out halfway, push back in firmly until it clicks. | | 4 | Check drum lock lever is fully closed. | Loose drum lock will misalign home sensor reading. |

If the sensor works but the error persists, the mechanical timing is off. This requires a . riso error a16-525

This specific error is not a simple paper jam or an out-of-ink warning. It is a hardware-level stoppage related to the machine’s critical paper transport and registration system. In plain terms, indicates a Timing Mismatch: Paper Position Sensor (PF Register Sensor) abnormality. | Step | Action | What to look