The pressure roller HP sensor (often designated as S26 or SEN60) may be disconnected, dirty, or defective.
Damaged harnesses or loose connectors between the motor/sensor and the control board. How to Fix and Reset SC569-00 sc569-00 ricoh
Worn fuser films, damaged pressure rollers, or seized bearings can increase the physical load on the motor, causing it to stall. The pressure roller HP sensor (often designated as
Open the right-side door and verify that the fuser film and pressure roller are not physically damaged. damaged pressure rollers
The pressure release motor may be locked due to an excessive load, or the motor driver itself could be defective.