Path: news.eternal-september.org!eternal-september.org!feeder3.eternal-september.org!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail From: "Carlos E.R." Newsgroups: sci.electronics.repair Subject: Re: HP printer trouble Date: Thu, 17 Apr 2025 22:02:19 +0200 Lines: 38 Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Trace: individual.net mO048B0oCud9tjbnBGs+8QV5CY904oo9BbejJCGFNnGg+sYJb3 X-Orig-Path: Telcontar.valinor!not-for-mail Cancel-Lock: sha1:ZBNdVmmxLn7SmsndLR4tkefUVhY= sha256:57+6T8U4Qt1mI8HUDbX1QYw04SSjz5LOJxNfEHgnsYU= User-Agent: Mozilla Thunderbird Content-Language: es-ES, en-CA In-Reply-To: On 2025-04-17 20:56, Jeff Liebermann wrote: > On Wed, 16 Apr 2025 20:23:59 +0200, "Carlos E.R." > 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: > > > 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.