For business-critical machines, individual component repair is risky. Replace the entire fuser unit with a genuine Ricoh OEM unit. After replacement:
Using a multimeter set to resistance (Ohms):
SC-569-00 is a critical service call error specific to Ricoh MFPs (Multifunction Printers) equipped with a Finisher (e.g., Booklet Finisher SR3220, SR3210, SR3250, or internal finisher types). The code indicates that the Finisher Alignment Fence Home Position Sensor does not detect the alignment fence returning to its home position within the specified time during initialization or operation.
In plain terms: The machine’s finisher cannot locate or verify the starting position of the paper alignment guides.
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 is a specific service call code related to the fusing unit (also known as the fuser). In technical terms, it indicates a "Zero Cross Error of the Fusing Thermistor."
To translate: The printer’s central processing unit (CPU) monitors the AC power supply to the fusing lamp. The "zero cross" refers to the point where the AC voltage waveform crosses zero volts. When the fusing thermistor (a temperature sensor) fails to detect the correct zero cross signal or detects an abnormal frequency, the printer instantly halts operation and displays SC569-00.
Note: While extremely similar to SC568 (Thermistor break) and SC570 (Fusing lamp overheating), SC569 specifically points to a signal timing or detection failure within the fusing heating circuit.
Less common but serious: The PSU’s zero-cross detection circuit fails. In this case, even a brand-new fuser will trigger SC569-00 immediately upon installation.
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The Ricoh error code SC569-00 specifically indicates a Fusing Pressure Release Motor Error. This occurs when the machine's control board fails to detect the home position signal from the fusing pressure release sensor during the pressure release operation. Error Overview
Definition: The fuser unit pressure release motor failed to move the pressure roller to its "home" (released) position within the required time.
Classification: This is typically a Type A Service Call (SC) code, meaning it will lock the machine and requires a specific reset procedure in service mode after the physical fault is addressed. Primary Causes sc569-00 ricoh
Faulty Fusing Pressure Release Sensor: The sensor (often U-shaped) may be dirty, disconnected, or defective, failing to report the motor's position.
Motor Failure: The pressure release motor itself may be stalled or burnt out.
Mechanical Obstruction: A paper jam in the fuser area or a broken gear in the pressure release mechanism can physically block the motor from reaching its target position.
Poor Connections: Loose or oxidized connectors between the fuser unit and the main body of the copier. Recommended Troubleshooting Steps
Inspect for Jams: Turn off the power and check the fuser unit for any stuck paper or debris that could block mechanical movement.
Check Sensor and Motor: Ensure the sensor is clean and the motor's drive gears are not damaged. In service mode, technicians can often test these components individually.
Reseat the Fuser: Remove and firmly reinstall the fuser unit to ensure all electrical pins are making proper contact with the machine's backplane.
Service Mode Reset: If the physical issue is resolved but the code persists, perform an SC Reset via the system service mode:
Enter the service menu (typically by pressing Reset + 107 + Clear/Stop or following the specific model's sequence). Navigate to SP 5810 (SC Reset). Select "Execute" and then restart the machine.
For more complex repairs, refer to the official Ricoh Service Manual for your specific model (e.g., MP C4503, MP C5503).
Troubleshooting Ricoh Error Code SC569-00: A Quick Guide If your Ricoh multifunction printer has ground to a halt with Error Code SC569-00, you’re dealing with a Fusing Pressure Release Motor Error. This service code appears when the machine's control board fails to detect the pressure release sensor's signal within a specific timeframe after the motor starts.
In simpler terms: the machine is struggling to engage or disengage the rollers in the fuser unit, which is critical for bonding toner to your paper. Common Causes
Sensor Failure: The pressure release sensor (often U-shaped) may be dirty, displaced, or faulty due to high heat exposure. The Ricoh error code SC569-00 specifically indicates a
Motor Malfunction: The motor responsible for moving the pressure rollers is defective or physically obstructed.
Mechanical Jam: Loose paper scraps or toner buildup can prevent the gears from turning.
Connection Issues: Loose wiring or poor contact between the fuser unit and the main body of the copier. Steps to Resolve SC569-00 1. Perform a Hard Reset
Sometimes the error is a temporary glitch. Turn off the main power switch, unplug the machine for at least 60 seconds, and then restart it. If the code persists, move to the next steps. 2. Check for Obstructions
Open the side panel and carefully inspect the fuser area. Look for any small scraps of paper or debris caught in the gears or near the pressure release motor. Use a can of compressed air to clear away dust or loose toner that might be blocking the sensor's "eye." 3. Inspect the Fuser Connector
Pull the fuser unit out (be careful, it may be hot) and inspect the rear connectors. Ensure no pins are bent and that the unit "clicks" firmly into place when re-inserted. 4. Reset the SC Code (Service Mode)
If you have cleared a physical jam but the error remains, you may need to reset the system through the Service Program (SP) mode.
Note: This typically requires a technician. Entering service mode incorrectly can affect machine performance. When to Call a Professional
If the sensor or motor has physically failed, parts will need to be replaced. You can find authorized service providers through the Ricoh Support page or by contacting local retailers like Copier Liquidation Center for technical guidance.
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Troubleshooting Ricoh Error Code SC569-00: A Comprehensive Guide
The SC569-00 error on a Ricoh device typically signifies a Fusing Pressure Release Error. This occurs when the Home Position (HP) sensor, located at the front of the pressure release camshaft, fails to detect the cam returning to or departing from its home position within a set time frame. Primary Causes of SC569-00
While several hardware components can trigger this service call, some are more common than others: Paper dust, toner residue, or melted adhesive from
One-Way Gear Failure: The most frequent culprit is the One-Way Gear (P/N: D0BQ1375). If this gear fails, you may hear several "thumping" rotations of the camshaft about 60 seconds after a job ends, followed immediately by the error.
HP Sensor Malfunction: The sensor itself may be defective or blocked by dust, preventing it from detecting the camshaft's position.
Camshaft Binding: Mechanical resistance or debris can prevent the camshaft from rotating smoothly.
Motor Failure: The Paper Exit/Pressure Release Motor may be failing or disconnected. Step-by-Step Troubleshooting and Repair Follow these steps to diagnose and resolve the error:
Initial Power Cycle: Turn the machine off and unplug it from the wall for at least 60 seconds to clear temporary electronic glitches. Inspect the One-Way Gear:
Remove the One-Way Gear and clean the needle bearings on the inner race and the shaft using alcohol.
Pro Tip: You can lightly roughen the shaft with a scouring pad before cleaning to improve grip.
Important: Do NOT use lubricant on the one-way gears or their shafts, as this will cause them to slip.
Check Firmware: Ricoh has released technical bulletins (e.g., for MP C6502) suggesting that Engine firmware updates (Ver. 1.29:08 or newer) can help prevent the camshaft from slipping out of position.
Hardware Replacement: If cleaning does not work, the One-Way Gear (D0BQ1375) or the Pressure Release Gear No. 3 (D1751377) may need to be replaced. How to Reset the SC Code
After performing repairs, the error must often be manually cleared via the Service Program (SP) Mode:
Enter Service Mode (typically by pressing Clear Modes → 107 → hold Stop/Clear for 3+ seconds). Navigate to System SP. Find and execute SP 5810 (SC Reset). Restart the machine to complete the process.
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.