Turn the machine off and then back on to see if the system clears the error automatically.
Open the front door, remove the toner cartridges one by one, and re-insert them securely.
A loose connection is a surprisingly common cause.
The u-shaped photointerruptive home position sensor easily collects loose paper dust, stray toner particles, and evaporated oil film. This blocks the internal optical lens from reading the actuator blade.
To better understand the issue, it helps to visualize the sequence of events that the printer expects to happen. The pressure release mechanism is designed to lift the pressure roller away from the hot roller, making it easier to clear paper jams from the fusing unit. sc569-00 ricoh
Before attempting a software reset, perform a physical inspection of the hardware:
: Open the right-side door of the machine and check for visible damage to the pressure roller or fuser film.
: Replace the main control board if the motor cycles erratically on its own while sitting idle. How to Software Reset an SC Fuser Error Code
While this error is often a mechanical or electrical fault rather than a "paper" type issue, it can be triggered or aggravated by certain paper conditions. Relationship to Paper Paper Jams Turn the machine off and then back on
Manually rotate the gear train linked to the pressure release motor to ensure smooth rotation.
: A frequent cause is a paper jam that has occurred within the fuser or paper exit area. If paper is stuck, it can physically block the pressure release mechanism from moving to its home position. Paper Weight/Type
Navigate or directly type in (labeled as SC Reset ). Select Execute on the screen.
Paper dust, toner residue, or melted adhesive from envelope printing can coat the thermistor. A contaminated thermistor acts as an insulator, delaying temperature sensing. The fuser lamp overheats while the sensor reads “cold,” triggering a zero-cross error. The pressure release mechanism is designed to lift
Open the right-side door of the copier to access the fuser compartment.
the main AC power cord completely from the wall outlet. Wait 60 to 90 seconds for electrical capacitors to drain. Plug the unit back in and power it on. Step 2: Clear the Fuser Area and Check for Binding
Dust or toner buildup on the "U-shaped" HP sensor can prevent it from detecting the actuator.
When a heavy-duty copier warms up or processes variable paper stocks, it dynamically adjusts the physical pressure between the hot fuser roller and the pressure roller. When the machine reaches roughly 150°C during warm-up, it cycles the pressure lift motor to test the system. If the sensor does not register this movement within a designated time window, the system throws the SC569-00 code and halts operation to prevent physical damage.
This error is formally defined in Ricoh service manuals as a . It specifically relates to a critical component inside your device: the fusing unit.
Constant heat cycles inside the chassis can cause electrical connectors at the back of the fuser unit to back out or develop intermittent connections.