The motor responsible for moving the roller is stuck or failing.
For a faster fix, replacing the entire fuser assembly is often recommended for older production machines.
The U-shaped sensor accumulates paper dust, stray toner particles, or grease over time. This blocks its optical lens, rendering it unable to read the positioning gear.
Check for any remaining bits of paper or debris around the fuser rollers. Check Sensor and Motor: sc56900 ricoh new
Using a non-genuine or incorrect part number for the Ricoh model.
Manually rotate the drive gears to check for smooth mechanical movement. If you feel resistance or hear grinding noises, look for cracked or missing gear teeth. Phase 3: Clearing the Code via Service Mode (SP Mode)
In heavy-use environments, the mechanical drivetrain—specifically the plastic gears driving the pressure-release mechanism—can wear thin, lose teeth, or bindingly lock up. 4. Poor Contact and Loose Harnesses The motor responsible for moving the roller is
Alternatively, on newer firmware versions, press -> 1 -> 4 -> 3 -> Hold C . Select System SP on the touch display.
: Damaged bearings or pressure rollers within the fusing unit can increase resistance beyond the motor's capacity.
This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. This blocks its optical lens, rendering it unable
To translate: Your Ricoh printer checks the AC power waveform (the “zero cross” point where voltage switches from positive to negative) to safely control the fusing heater lamps. When the printer cannot detect this point reliably, or when the fusing heater stays on for too long without proper control, it throws SC56900.
If the internal control board fails to receive a completion signal from the hardware positioning sensors within a tightly prescribed window of time, it defaults to a critical system lockout and triggers the SC569-00 status message. Primary Root Causes of the SC569-00 Fault