Sc569-00 Ricoh May 2026

The error is a protective mechanism, not a random annoyance. It signals that your printer’s fusing system has detected a dangerous temperature anomaly at the roller edge. In 90% of cases, replacing the fusing unit and performing an engine clear resolves the issue.

Physical damage to the thermistor’s wire harness or a loose connector (usually CNxxx on the fuser or controller board) creates an intermittent signal. sc569-00 ricoh

Verify that the wiring harness between the motor and the BCU board is not pinched or disconnected. ⚠️ Professional Service Note The error is a protective mechanism, not a random annoyance

: A defective motor driver or a damaged wire harness connecting the sensor to the main board can interrupt the signal. Physical damage to the thermistor’s wire harness or

: The pressure release motor itself may have failed or disconnected. Obstructions

: Perform a hard reset by turning the machine off, unplugging it for 60 seconds, and then plugging it back in to see if the error clears on startup. Reset via Service Mode