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  • Writer's pictureTrent Jensen

How to Reset SC 542 and SC 546 Error Codes on Ricoh Copiers

Ricoh copiers are renowned for their reliability and performance. However, like all machines, they can sometimes run into issues. One of the most common issues users face is the SC 542 and SC 546 error codes. These codes typically indicate a problem with the fusing unit or its temperature regulation. In this guide, we'll walk you through the steps to reset these error codes and get your copier back up and running.

SC 542

What Causes SC 542 and SC 546 Error Codes?

The SC 542 and SC 546 error codes are caused by issues related to the fusing unit's temperature. They can be triggered by:

  1. A malfunctioning thermistor.

  2. A broken fusing lamp.

  3. A defective thermostat.

  4. Power supply issues.

If the Error persists after the following reset. It is highly advisable to consult with our team of professionals, as the machine likely has a more serious error or malfunction.

Steps to Reset Fusing Error Codes (SC 542):

  1. Access Service Mode:

    1. Press the yellow “Clear Modes” button.

    2. Now, press the numbers 1, 0, and 7 in quick succession.

    3. Press and hold the red “Clear/Stop” button for a few seconds until the screen changes.

  2. Navigate to SP Mode:

    1. Once you’re in the service mode, press the “Copy/System SP” button on the touchscreen.

    2. This will lead you to the SP mode.

  3. Reset the SC 542/546 Error Code:

    1. Scroll down on the touchscreen until you find “SP 5-810” and

    2. Select "Execute".

    3. The system will now reset the error code.

  4. Turn off the Copier and Restart:

    1. Switch off the machine using the red power switch, wait for a few moments.(around 10 seconds)

    2. Turn it back on.

If the error persists, it may indicate a more serious issue that needs attention. In such cases, it’s advisable to consult a professional on our team for assistance.

Preventive Measures:

To reduce the chances of encountering these error codes:

  • Ensure the copier is placed in a location with stable temperatures.

  • Regularly clean and maintain the machine to prevent dust accumulation.

  • Schedule periodic checks with professionals to ensure all components are functioning properly.


While the SC 542 and SC 546 error codes can be a temporary setback, with the right steps, they can be resolved quickly. Always prioritize safety and if in doubt, don't hesitate to reach out to a professional technician on our expert team for assistance.



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