Question about Kyocera FS-920 Laser Printer

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Missing developer unit

Computer displays message "missing developer unit"

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Generally this printer can be separate into 4 major part: Printer body, Toner container, Developer unit and Drum unit. The developer unit is the unit where the toner container "mount" on it and it should be removed to allow cleaning task every time the toner container is replaced.
U may get this error message if the developer unit is not install properly after u replace a new toner container. Just lift the developer unit together with the toner container out of the printer and then insert back properly into the machine.

YBC (/\)

Posted on Oct 02, 2009

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I had the same problem with the Kyocera P2135dn: missing developer unit. I have cleaned the developer unit by the older toner (i think the toner was a poor quality one) and added a new toner. Now it is working just fine.

Posted on Feb 09, 2018

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Posted on Jan 02, 2017

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SOURCE: missing developer unit

Generally this printer can be separate into 4 major part: Printer body, Toner container, Developer unit and Drum unit. The developer unit is the unit where the toner container "mount" on it and it should be removed to allow cleaning task every time the toner container is replaced.
U may get this error message if the developer unit is not install properly after u replace a new toner container. Just lift the developer unit together with the toner container out of the printer and then insert back properly into the machine.

YBC (/\)

Posted on Oct 02, 2009

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How do i fix problem Add Toner


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Missing developer unit


Generally this printer can be separate into 4 major part: Printer body, Toner container, Developer unit and Drum unit. The developer unit is the unit where the toner container "mount" on it and it should be removed to allow cleaning task every time the toner container is replaced.
U may get this error message if the developer unit is not install properly after u replace a new toner container. Just lift the developer unit together with the toner container out of the printer and then insert back properly into the machine.

YBC (/\)

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