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From: "Carlos E.R." <robin_listas@es.invalid>
Newsgroups: sci.electronics.repair
Subject: Re: HP printer trouble
Date: Thu, 17 Apr 2025 22:02:19 +0200
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On 2025-04-17 20:56, Jeff Liebermann wrote:
> On Wed, 16 Apr 2025 20:23:59 +0200, "Carlos E.R."
> <robin_listas@es.invalid> wrote:
> 
>> But today it claimed to have a paper jam. I opened the paper drawer, the
>> back panel, the toner drawer. No paper jam at all. I closed it again,
>> the printer tried again, and after two tries it continued printing happily.
> 
> There are various plastic "paddle" sensors along the paper path that
> are used to detect paper jams or misfeeds.  If the rubber paper feed
> roller slips slightly when trying to feet a page, the printer will
> detect that the paper is "late".  The printer then declares a paper
> jam.  If it correctly feeds a few pages, but then jams, my guess would
> be the same as the other Jeff's.  You might have lint, dust, clay
> paper coating, loose toner, shreded paper, insects, etc that are
> causing the rubber rollers to slip on the paper.
> 
> For the CP1515, it's likely that the rubber has been polished smooth
> by the slightly abrasive paper.  That will also make the roller slip.
> Try removing the rubber part of the roller from the plastic drum and
> flipping it over.  That should give the roller a 2nd life.  However,
> what works every time is to purchase and install a rebuild kit.  At a
> minimum, you need at least the feed roller RM1-4426 and the separation
> roller RM1-4425. For example:
> <https://www.ebay.com/sch/i.html?_nkw=cp1515%20rebuild%20kit>
> 
> I can think of a few uncommon failures that might cause a paper jam
> indication.  Try roller cleaning and replacement before we go down the
> rabbit hole.
> 

Well, your explanation allows me to understand what is going on, but I 
don't think I would be able to disassemble the thing.



-- 
Cheers, Carlos.