Verify that the wiring harness between the motor and the BCU board is not pinched or disconnected. ⚠️ Professional Service Note

To understand this error, you need to know a bit about your printer's fusing process. The fuser unit uses intense heat and pressure to fuse toner onto the paper. Between print jobs, a motor-driven mechanism releases this pressure to prevent damage to the fuser components, particularly the fuser sleeve, and to make it easier to clear paper jams.

Follow this structured, sequential hierarchy to diagnose and fix the error. Step 1: Execute a Basic Power Reset

If mechanical binding is not the issue, the sensor or encoder may be at fault.

The specifies that the machine's primary controller board failed to receive a confirmation signal from the pressure mechanism's home position sensor within a strict, predetermined timeframe. Common Affected Models

Manually rotate the fuser drive gears and pressure release cams to ensure fluid, unhindered motion. Step 3: Clean and Test the Home Position Sensor

: 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:

Reseat all relevant connectors to ensure tight, reliable contacts.

Determined to fix the issue himself, John decided to investigate further. He discovered that the SC569-00 error code was related to a problem with the printer's developer refresh process. The developer is a critical component in the printer that helps to adhere toner to the paper.

This specific Service Call (SC) code triggers when the Home Position (HP) sensor fails to detect the movement of the pressure roller contact mechanism. It completely halts the machine to safeguard the hardware from physical stress, keeping your multi-function printer (MFP) offline until it is addressed.

: Over time, excessive factory grease applied to the pressure mechanism bushings migrates into the one-way bearings. This causes the bearings to slip, meaning the mechanism cannot maintain or release pressure correctly.

: The motor winding degrades, preventing it from driving the release shaft.

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.

The code indicates that the printer’s main control board has detected a locking or abnormal movement in the toner supply mechanism . It is a critical error, often preventing further operations until the error is cleared or repaired. 2. Common Causes