The Feed Roller Assembly indeed is the entire shaft with clutch and feed roller. My experience on SX engines has been clutch failure more often than solenoid failure on the paper control pca although the feed roller replacement was the most common failure for me. I was repairing these for the US ARmy Personnel Command in Alexandria, Virginia on a daily basis and learned to swap out the entire feed roller assembly at once to ensure the printer was back online okay and avoid a recall. I'd typically get about six SX calls a day (along with various pc problems and other printer calls) so I had to keep moving. I would rebuild these feed roller assemblies in my office when time and replacement parts allowed. Regarding the CX engine, the clutch in the cassette feed roller assembly (which requires splitting the clamshell> a piece of cake after you've done it a few times) was the biggest feed failure item I encountered. Those weird feed wedges (three I seem to recall) rarely failed. Marty ______________________________ Reply Separator _________________________________ Subject: Re: HP Laserjet Series II Author: classiccmp(a)u.washington.edu at internet Date: 12/1/98 5:04 PM Ditto... Isn't that the complete spindle with the clutch, etc. It's a _lot_ cheaper to buy just the worn roller (I have _never_ had a clutch fail), and almost as quick to change it. There is another common cause for paper jams in that area. Namely that one of the clutch solenoids isn't firing - either the pickup clutch solenoid or the registration solenoid. There are 2 ways to tell : How far does the paper move ? About 1" -> registration solenoid A little -> worn pickup roller Not at all -> pickup solenoid or totally worn roller. If there is a solenoid problem, there are 3 solutions : Replace the 'electronic component assembly' (PSU + clutch board) -- $$$$$$$$ Replace the switch/solenoid PCB (clutch board) -- $$$ Fix the darn thing. There are _4_ components for each clutch - the solenoid, the back-emf protection diode, the driver transistor, and its base resistor. The transistor is the most likely failure, btw. It actually takes less time to test the components than to look up the price/part number for the PCB :-) It could also be a problem on the DC controller board, but I have never had that. -tony ------ Message Header Follows ------ Received: from lists5.u.washington.edu by smtp.itgonline.com (PostalUnion/SMTP(tm) v2.1.9i(b5) for Windows NT(tm)) id AA-1998Dec01.170458.1767.81345; Tue, 01 Dec 1998 17:04:59 -0500 Received: from host (lists.u.washington.edu [140.142.56.13]) by lists5.u.washington.edu (8.8.4+UW97.07/8.8.4+UW98.06) with SMTP id OAA19811; Tue, 1 Dec 1998 14:02:35 -0800 Received: from mxu1.u.washington.edu (mxu1.u.washington.edu [140.142.32.8]) by lists.u.washington.edu (8.8.4+UW97.07/8.8.4+UW98.06) with ESMTP id OAA22394 for &lt;classiccmp(a)lists.u.washington.edu&gt;du>; Tue, 1 Dec 1998 14:01:42 -0800 Received: from post.mail.demon.net (post-12.mail.demon.net [194.217.242.41]) by mxu1.u.washington.edu (8.9.1+UW98.09/8.9.1+UW98.09) with ESMTP id OAA15 680 for &lt;classiccmp(a)u.washington.edu&gt;du>; Tue, 1 Dec 1998 14:01:10 -0800 Received: from [158.152.97.199] (helo=p850ug1) by post.mail.demon.net with smtp (Exim 2.053 #1) id 0zkxpA-0002sa-00 for classiccmp(a)u.washington.edu; Tue, 1 Dec 1998 21:59:12 +0000 Received: by p850ug1 id <m0zkvCX-000IyRC@p850ug1> (Debian /\oo/\ Smail3.1.29.1 #29.33); Tue, 1 Dec 98 19:11 GMT Message-Id: <m0zkvCX-000IyRC@p850ug1> Date: Tue, 1 Dec 1998 19:11:07 +0000 (GMT) Reply-To: classiccmp(a)u.washington.edu Sender: CLASSICCMP-owner(a)u.washington.edu Precedence: bulk From: ard(a)p850ug1.demon.co.uk (Tony Duell) To: "Discussion re-collecting of classic computers" &lt;classiccmp(a)u.washington.edu&gt; Subject: Re: HP Laserjet Series II In-Reply-To: &lt;1998Dec01.092201.1767.164934(a)smtp.itgonline.com&gt; from "Marty" at Dec 1, 98 09:23:27 am Content-Type: text X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN