Question about Dell 3100cn Laser Printer
From Dell Support:
The 004-321 error is caused by the IBT Home position sensor failing to detect the metallic foil attached to the IBT belt.
If you remove the print drum from the top of the unit and place it on a clean flat surface (green drum down, being careful nothing contacts the green drum) and orient the drum unit so the "pointed" end is facing you, you should see a rubberized belt.This is the IBT belt and is what carries the image while the image is being built. This belt should be centered between each side wall of the drum unit. Yours probably isn't.
If you remove the screws that attach the top cover, you will find angled rollers that center the belt. One of these may not be mounted correctly.
Hope this helps
Posted on Aug 04, 2010
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Posted on Jan 02, 2017
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