C970e-STUDIO 2309AHas video

How to Fix Toshiba e-STUDIO 2309A Error C970

The C970 error code on the Toshiba e-STUDIO 2309A represents a high-voltage leakage or discharge abnormality from the main charger unit. The copier's internal diagnostic system shuts down operation when a continuous voltage drop is detected to prevent damage to the OPC drum.

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Common causes

  • 1Accumulated toner or developer spill shorting the corona wire to the metal grid.
  • 2High ambient humidity facilitating electric arcing.
  • 3Broken or deformed main charger corona wire.
  • 4Defective High-Voltage Power Supply (HVPS) board.

Solutions

A C970 fault is usually caused by excessive toner deposits, humidity, or lint inside the corona assembly, bridging the high-voltage wire to the metallic ground grid.

Step-by-Step Resolution Guide:

  1. Clean the Corona Wire: Pull out the drum unit assembly. Locate the integrated green or blue cleaning slider on the main charger unit and slide it back and forth several times.
  2. Check the Grid: Inspect the grid plate underneath the charger. If there are signs of severe oxidation or burn marks, the charger unit must be replaced.
  3. Inspect High-Voltage Contacts: Wipe clean the metal leaf contacts on both the cartridge frame and inside the printer cavity with a dry cloth to ensure correct electrical paths.

Steps to follow

  1. 1

    Turn off power source

    Unplug the power plug from the wall outlet to guarantee safety when working near high-voltage charging units.

  2. 2

    Cycle the internal charger cleaner

    Locate the cleaning tab on the charger. Slide it smoothly across the assembly. Ensure the tab is returned to its parked position.

  3. 3

    Wipe metal contacts

    Inspect and clean any metal spring-loaded high-voltage bias contacts on the rear of the drum cartridge to ensure perfect connectivity.

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Frequently asked questions

High moisture content in the air lowers electrical resistance, allowing high voltage to arc to nearby ground points. Using a dehumidifier in the print room can mitigate this problem.

If left in the middle of the wire, the cleaning pad will physically block the charge transfer to the OPC drum, resulting in a blank white band on your printed pages.

How to Fix Toshiba e-STUDIO 2309A Error C970 | Vimazdev