CAUSE: Developer:

The doctor blade gap, inside the developer unit, may be too large allowing the iron particle toner carrier to build up on the sleeve. The carrier then tends to come in contact with the OPC Drum and causes small holes to be punched into the OPC drum coating, thus causing small black dots. The dot pattern will generally appear on either the left or right side of the paper.

Continuing to print with a "TONER LOW"message can aggravate the condition and cause the metal carrier to transfer to the OPC drum. "DO NOT"keep printing, add toner to the developer unit.

OPC Drum:

Foreign material such as paper dust or paper chaff may become trapped between the drum roller and the seal.

SOLUTION/PROCEDURE:

Developer:

In the event that toner is not low and unwanted black dots are appearing on the page, the "Developer Unit"and "OPC Drum"may need to be replaced. If the CRU's (Customer Replaceable Units) are under warranty, their replacement can be coordinated directly with Output Technology Corporation. Print a summary page from the extended configuration menu and contact Output Technology "Customer Technical Services". You will receive a RMA number to return the items to the factory. The units will be either repaired, replaced, or prorated based on the respective foot counts.

If it is an emergency situation and there is not a developer unit readily available, the doctor blade can sometimes be adjusted. However, this is a very sensitive adjustment. See technical bulletin number 92-LM1000-148 for the procedure.

OPC Drum:

Remove the OPC Drum from the unit and run a business card or similar material between the roller and the mylar seal. This should remove any foreign matter that may have been caught between the OPC Drum and seal, which could have allowed toner to sprinkle down onto the paper.

CAUTION:

When returning the "Developer Unit"or "OPC Drum"make sure that it is SEALED within adequate packaging to prevent toner leakage/contamination.

Return parts in a proper shipping container to prevent shipping damage.

Note: Page counts are required with all parts being returned under warranty.