I've got a CLJ 4650 that doesn't print black. All colors print correctly. I did a stop test, and there was no black image on the black drum. No error codes. All the drum & ctg connectors seem to be fine. Any ideas?
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Re: CLJ 4650 no black
Check:
Developer Disengagement Plate - RB2-8239
Spring tension - RS6-2537
Came across a couple, years ago, where some of the lower teeth on the DDP were broken and not working right. Have also had a couple where the spring breaks. You can't see the broken teeth on the DDP unless you remove it. A sign that the teeth are broken are unusual noises when the plate moves up and down.
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