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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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Laser printer gloat
This inspired by the mini-thread in the thread up yonder about HP
DeskJet printers. Actually something of a reverse gloat, along the lines of "my old printer still works; does yours?". Got my HP LaserJet 2100M (600 DPI w/PostScript capability) ca. 2000. Not only is the printer still working perfectly, but I'm still using the same cartridge I got with it! Which is a little puzzling; while the printer hasn't exactly been used in a production environment, I have put plenty of pages through it: printed out many entire manuals, etc. I'm just waiting for the cartridge to empty out, but it still hasn't come close. (I even have a 2nd cartridge I got with the printer, still in its foil package.) One thing I really don't like about this, and really most HP printers that I've used, is that it hates to print on the back of printed sheets. Usually it eats/shreds about half the sheets one tries to print this way. Yeah, I know, you can get HPs with "duplex" options, but to me, that's utter bull****. I remember the old Panasonic laser printer my old office had. It was a huge beast, and certainly no better than the HP we also had at the time (LJ 4???), but the Panasonic would feed *any* paper you put into it, even if it had just been run through the printer on one side. I'd always use it to print out my manuals on 2 sides for proofing. Other than this, the LaserJet is a fine piece of equipment. -- Who needs a junta or a dictatorship when you have a Congress blowing Wall Street, using the media as a condom? - harvested from Usenet |
#2
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Laser printer gloat
David Nebenzahl wrote:
This inspired by the mini-thread in the thread up yonder about HP DeskJet printers. Actually something of a reverse gloat, along the lines of "my old printer still works; does yours?". Got my HP LaserJet 2100M (600 DPI w/PostScript capability) ca. 2000. Not only is the printer still working perfectly, but I'm still using the same cartridge I got with it! Which is a little puzzling; while the printer hasn't exactly been used in a production environment, I have put plenty of pages through it: printed out many entire manuals, etc. I'm just waiting for the cartridge to empty out, but it still hasn't come close. (I even have a 2nd cartridge I got with the printer, still in its foil package.) One thing I really don't like about this, and really most HP printers that I've used, is that it hates to print on the back of printed sheets. Usually it eats/shreds about half the sheets one tries to print this way. Check that there's still some tread on the rollers, and maybe the separation pad. Yeah, I know, you can get HPs with "duplex" options, but to me, that's utter bull****. All the duplexers do is flip the paper over so it can refeed. Printing on the blank side of once-printed paper shouldn't be a problem. Several brands of big office copier/printers used to provide me with lots of hundred-page PostScript misprints. That once-printed paper worked fine in LaserJet 4050 and 4350 printers. -- Warren Block * Rapid City, South Dakota * USA |
#3
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Laser printer gloat
"David Nebenzahl" wrote in message .com... This inspired by the mini-thread in the thread up yonder about HP DeskJet printers. Actually something of a reverse gloat, along the lines of "my old printer still works; does yours?". **I was just saying to my partner last week, that what I hated most about my HP Laserjet 5MP (ca. 1994) was that the damned thing refuses to stop working. I've fed it with more than a dozen cartridges (around 60,000 pages) and it simply works and works perfectly. Print resolution is flawless, paper jams almst unheard of (one every thousand pages or so). I've even been using re-filled cartridges (despite HP's dire warnings), which cost around AUS$60.00 apiece and it just won't stop. As of 2009, it can only be regarded as a slug (6 pages/min), but it does the job. Damn it! I really wanted an excuse to buy one of those all bells & whistles, HP colour laser printers. FWIW: In the time I've owned the HP, I've thrown out four ink jet printers, of various brands. They are, on the whole, utter crap. My HP will probably still be working well into the next millenium. -- Trevor Wilson www.rageaudio.com.au |
#4
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Laser printer gloat
David Nebenzahl wrote:
Got my HP LaserJet 2100M (600 DPI w/PostScript capability) ca. 2000. Not only is the printer still working perfectly, but I'm still using the same cartridge I got with it! Which is a little puzzling; while the printer hasn't exactly been used in a production environment, I have put plenty of pages through it: printed out many entire manuals, etc. I'm just waiting for the cartridge Most toner cartridges are designed for thousands of pages. (e.g., 5,000 pages -- 10 reams of paper) to empty out, but it still hasn't come close. (I even have a 2nd cartridge I got with the printer, still in its foil package.) I've had the same problem -- though I consider it an *annoyance*! I routinely rescue color printers (not the cheap inkjets), run them until they run out of ink/toner and then scrap/recycle them. Unfortunately, even printing 8.5x11 photos (i.e., 100% ink coverage) I haven't been able to "empty" any of them! I've been concentrating on a Phaser 8200 for the past year and it looks like there are still many months more of service left in the "ink tray" : One thing I really don't like about this, and really most HP printers that I've used, is that it hates to print on the back of printed sheets. Usually it eats/shreds about half the sheets one tries to print this You've either got bad rollers, a bad fuser or "off brand" toner. I haven't had problems with any LJ (I currently have an LJ4M+ and an LJ6P) printing "back side" (the LJ4M+ has the optional duplexer so it *wants* to print "verso") way. Yeah, I know, you can get HPs with "duplex" options, but to me, that's utter bull****. I remember the old Panasonic laser printer my old office had. It was a huge beast, and certainly no better than the HP we also had at the time (LJ 4???), but the Panasonic would feed *any* paper you put into it, even if it had just been run through the printer on one side. I'd always use it to print out my manuals on 2 sides for proofing. Other than this, the LaserJet is a fine piece of equipment. I couldn't *kill* my LJii! I finally had to get rid of it as the electric costs were ridiculous (though the toner carts were awful cheap!) |
#5
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Laser printer gloat
Trevor Wilson wrote:
"David Nebenzahl" wrote in message .com... This inspired by the mini-thread in the thread up yonder about HP DeskJet printers. Actually something of a reverse gloat, along the lines of "my old printer still works; does yours?". **I was just saying to my partner last week, that what I hated most about my HP Laserjet 5MP (ca. 1994) was that the damned thing refuses to stop working. I've fed it with more than a dozen cartridges (around 60,000 pages) and it simply works and works perfectly. Print resolution is flawless, paper jams almst unheard of (one every thousand pages or so). I've even been using re-filled cartridges (despite HP's dire warnings), which cost around AUS$60.00 apiece and it just won't stop. As of 2009, it can only be regarded as a slug (6 pages/min), but it does the job. Damn it! I really wanted an excuse to buy one of those all bells & whistles, HP colour laser printers. Think carefully before buying color. Decide what you really need from the printer (I recall going through this exercise at a company where we were *designing* a printer). I use different printers for different jobs. E.g., LJ6P for low volume B&W printing -- when I want to print a web page or "copy" a document (using a scanner); LJ4M+ for big B&W jobs (I think it is 12PPM and duplexes so it saves me paper); a Sony DPP-EX50 for postcard photographs; Phaser 560 for high volume color "documents"; other "solid inkj" phasers for large color photos; R1800 for big photos and/or CD labels; etc. If all you need is "multicolor business documents" (i.e., where ICM isn't important) you can more effectively trade money for speed, reduced supply costs, etc. OTOH, if you want to print photos, you will find the cost of printing "business documents" to be much higher than you would like. FWIW: In the time I've owned the HP, I've thrown out four ink jet printers, of various brands. They are, on the whole, utter crap. My HP will probably still be working well into the next millenium. HP inkjets are total crap. Some of the high end Epson's are respectible -- *if* you maintain them well (I have an R1800, SC3000 and SP2000P which have all performed well -- though Photoshop doesn't like the oversized pages on the SC3000) |
#6
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Laser printer gloat
On 11/3/2009 5:46 PM Warren Block spake thus:
David Nebenzahl wrote: One thing I really don't like about this, and really most HP printers that I've used, is that it hates to print on the back of printed sheets. Usually it eats/shreds about half the sheets one tries to print this way. Check that there's still some tread on the rollers, and maybe the separation pad. Nope. Not the problem. It's inherent in the lousy HP feeder design. I've never seen a LaserJet that would print on the back side of just-printed sheets even when brand new. -- Who needs a junta or a dictatorship when you have a Congress blowing Wall Street, using the media as a condom? - harvested from Usenet |
#7
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Laser printer gloat
On Tue, 03 Nov 2009 16:56:06 -0800, David Nebenzahl
wrote: This inspired by the mini-thread in the thread up yonder about HP DeskJet printers. Actually something of a reverse gloat, along the lines of "my old printer still works; does yours?". A better question would be "What's the useful lifetime of your printer" or perhaps "How many pages did you print before it ended up at the recyclers"? Got my HP LaserJet 2100M (600 DPI w/PostScript capability) ca. 2000. Not only is the printer still working perfectly, but I'm still using the same cartridge I got with it! I used to have one of those at home. The HP2100 series will do 1200dpi, which looks really nice for photos. However, the stupid driver install defaults to 600dpi. Most people fail to notice until I change the settings. http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=bpl06416&locale=en_US&prodSe riesId=25469&prodTypeId=18972#A3 My 2100n worked ok but had a few issues. The fuser and fan are thermostatically controlled and would cycle all night, which tended to keep me awake. I don't mind listening to noise when it's printing, but don't need the noise when it's idle. The power saving standby function apparently didn't include the fan. 10 pages per minute was a bit slow for me. My current 2200dtn solved these problems. It uses the same cartridge, prints on both sides, does not make noise when in standby, has 2 trays, and never seems to jam if I use decent paper (except when printing my tax returns). Incidentally, on the paper issue, I've found that thin 16 lb paper tends to jam far more often than the 22 and 24 lb stock I'm currently using. I've fixed many a paper jam problem by simply switching paper. My neighbor is into recycling everything which includes saving old printed pages and printing on the back side. The result is toner all over rubber parts of the fuser roller assembly, where the previously printed toner transfers to the roller when heated. Which is a little puzzling; while the printer hasn't exactly been used in a production environment, I have put plenty of pages through it: printed out many entire manuals, etc. I'm just waiting for the cartridge to empty out, but it still hasn't come close. (I even have a 2nd cartridge I got with the printer, still in its foil package.) The 96A cartridge is rated for 5000 pages in econo mode (600dpi). My guess s about 4000 at 1200dpi. That's about 2-3 times what you might get from some of HP's low end printers, such as the HP1012 with a 12A cartridge (rated at 2000 pages). However, my favorite office production printer (of the week), the HP LaserJet 4300, uses a 39A cartridge, which is rated for 16,000 pages. Some vendors claim up to 30,000 pages, but I don't believe it. Last year, my tax prep customers averaged about 18,000 pages per cartridge. The problem is that the stock HP carts cost about $120. There are refills available for as little at $30, but the chip on these carts do not show toner status. They also require a minor button pushing ordeal to get rid of the "non-HP cart inserted" message. One thing I really don't like about this, and really most HP printers that I've used, is that it hates to print on the back of printed sheets. Usually it eats/shreds about half the sheets one tries to print this way. True. The printers expect the pages to be flat. Pages that have gone through the printer tend to be slightly warped. That causes paper jams. Remelting the toner on the back side of the page sometimes causes the toner to stick to the rubber roller in the fuser, causing exit jams. Paper doesn't like to slide smoothly off the stack in the tray when there's printing on the back side. That's an especially bad problem if you print a stack of paper, and then feed the stack back through the printer again to print on the back side. The pages will stick together. The rubber "feet" above the feed tray don't like to push against printed paper, where the black areas are much slicker than the unprinted white paper. It's usually not a problem with a fairly new printer, but after the rubber feet get worn and slick, things tend to slide. Yeah, I know, you can get HPs with "duplex" options, but to me, that's utter bull****. Ummmm... well, ok. The duplexer will slow down the printer, even when printing one page on one side. The duplexers I have on various 2100, 4200, 4300, and older HP printers work just fine. I can't say the same for flipping over the stack and feeding the pages through again. I remember the old Panasonic laser printer my old office had. It was a huge beast, and certainly no better than the HP we also had at the time (LJ 4???), but the Panasonic would feed *any* paper you put into it, even if it had just been run through the printer on one side. I'd always use it to print out my manuals on 2 sides for proofing. I suppose that's an advantage if you run a mix of paper. The printers I run into all run 20, 22, or 24 lb white paper in the main tray, and some heavier stock (for cover sheets) in the 2nd tray. Sometimes, some colored paper in the 3rd tray and possibly an envelope feeder or pile of envelopes in the "multipurpose" tray. Incidentally, many of my customers are buying office copiers that can also act as a printer. This is becoming quite common. Printing speed is greatly improved and it eliminates a redundant printer. However, just try juggling paper around reprinting the back side in one of these high end office copiers. They get some of their speed and reliability by being optimized for a limited range of paper weights and types, and will screw up badly if fed used, damaged, or wrong paper. Other than this, the LaserJet is a fine piece of equipment. Yep. Plug: http://www.fixyourownprinter.com http://www.printerworks.com http://partsurfer.hp.com One reason I like HP is that I can get information, parts, refurbs, software, hacks, 3rd party parts, etc. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
#8
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Laser printer gloat
On Tue, 03 Nov 2009 19:45:34 -0700, D Yuniskis
wrote: HP inkjets are total crap. Not really. The DesignJet plotters are quite nice. Also, every vendor has its winners and losers. Current HP inkjet printers seem to be aimed at the very bottom of the market. They're little better than throw aways. However, some of the more expensive HP inkjet printers are tolerable. Some of the high end Epson's are respectible -- *if* you maintain them well (I have an R1800, SC3000 and SP2000P which have all performed well -- though Photoshop doesn't like the oversized pages on the SC3000) Yep. However, I don't like Epson because of the difficulty in obtaining parts, and their refill protection scheme. In addition, having access to parts is often not enough as proprietary software is required to align and calibrate the printer. There is a hack: http://www.ssclg.com/epsone.shtml http://inkjetprinterhelp.us/epsonSSC.html to get around this, but Epson also juggles the firmware to compensate. Epson may make better high end inkjet printers, but if I can't maintain them, they'll probably end up at the recyclers. I dunno about the "oversized pages" problem. I use various HP plotters for large format print jobs but don't use Photoshop. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
#9
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Laser printer gloat
On 11/3/2009 8:35 PM Jeff Liebermann spake thus:
On Tue, 03 Nov 2009 16:56:06 -0800, David Nebenzahl wrote: One thing I really don't like about this, and really most HP printers that I've used, is that it hates to print on the back of printed sheets. Usually it eats/shreds about half the sheets one tries to print this way. True. The printers expect the pages to be flat. Pages that have gone through the printer tend to be slightly warped. That causes paper jams. Exactly. (And to the person in this thread who responded to this with "bull****", I say "bull****!" right back atcha.) In case I wasn't clear, the problem I was referring to was printing a document on both front and back, where you first print the odd pages, then run the stack back through on the other side and print the even pages. Every non-duplexing HP LaserJet I've ever seen will **** up and jam if you try to do this. The problem, as you said, is the curl imparted to the paper by the fuser. I have had some success taking the first-printed stack and "working" it vigorously to remove the curl, but it's a pain in the ass, and not guaranteed to work. Since there are other laser printers that don't have this problem, I can only conclude that HP LaserJets have inferior feed mechanisms. And I do know what the hell I'm talking about: in a previous life I was a printer (as in a real printing press, not desktop computer printers), so I've dealt with lots of machines that eat paper. -- Who needs a junta or a dictatorship when you have a Congress blowing Wall Street, using the media as a condom? - harvested from Usenet |
#10
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Laser printer gloat
On 11/3/2009 9:39 PM Bob Larter spake thus:
David Nebenzahl wrote: One thing I really don't like about this, and really most HP printers that I've used, is that it hates to print on the back of printed sheets. Usually it eats/shreds about half the sheets one tries to print this way. Yeah, I know, you can get HPs with "duplex" options, but to me, that's utter bull****. I remember the old Panasonic laser printer my old office had. It was a huge beast, and certainly no better than the HP we also had at the time (LJ 4???), but the Panasonic would feed *any* paper you put into it, even if it had just been run through the printer on one side. I'd always use it to print out my manuals on 2 sides for proofing. It'll work better if you ensure that you print on the correct side of the sheet first. Check your paper packet for an arrow, & a label saying "Print this side first", & load your paper tray accordingly. It'll also help to riffle the stack of paper before loading it into the cartridge. Give the paper cartridge a shake to even up the edges before putting it in the printer. I've done all those things; none of them make the slightest difference. (As a former printer, it's an automatic reflex for me to fan paper before inserting it into a paper-eating machine.) -- Who needs a junta or a dictatorship when you have a Congress blowing Wall Street, using the media as a condom? - harvested from Usenet |
#11
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Laser printer gloat
David Nebenzahl wrote:
On 11/3/2009 5:46 PM Warren Block spake thus: David Nebenzahl wrote: One thing I really don't like about this, and really most HP printers that I've used, is that it hates to print on the back of printed sheets. Usually it eats/shreds about half the sheets one tries to print this way. Check that there's still some tread on the rollers, and maybe the separation pad. Nope. Not the problem. It's inherent in the lousy HP feeder design. Hmm. The LJ2100 feeder is kind of poor, like a lot of the earlier and lower-end LaserJets. The 4050 and up have the best I've seen. I've got some LJ2100s and will give this a try. I've never seen a LaserJet that would print on the back side of just-printed sheets even when brand new. Have you tried a 4050 or newer? -- Warren Block * Rapid City, South Dakota * USA |
#12
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Laser printer gloat
On 11/3/2009 9:20 PM Warren Block spake thus:
David Nebenzahl wrote: I've never seen a LaserJet that would print on the back side of just-printed sheets even when brand new. Have you tried a 4050 or newer? No; I should have said that my experience with these printers is as of about 5 years ago. Let us know how the feeding experiment with the 4050 goes. -- Who needs a junta or a dictatorship when you have a Congress blowing Wall Street, using the media as a condom? - harvested from Usenet |
#13
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Laser printer gloat
On Tue, 03 Nov 2009 21:07:50 -0800, David Nebenzahl
wrote: In case I wasn't clear, the problem I was referring to was printing a document on both front and back, where you first print the odd pages, then run the stack back through on the other side and print the even pages. Every non-duplexing HP LaserJet I've ever seen will **** up and jam if you try to do this. The problem, as you said, is the curl imparted to the paper by the fuser. I have had some success taking the first-printed stack and "working" it vigorously to remove the curl, but it's a pain in the ass, and not guaranteed to work. Yep. You also have to let the stack cool down a bit. I also listed some other problems that can cause paper jams when trying to print double sided without a duplexer.... (cut-n-paste): The printers expect the pages to be flat. Pages that have gone through the printer tend to be slightly warped. That causes paper jams. Remelting the toner on the back side of the page sometimes causes the toner to stick to the rubber roller in the fuser, causing exit jams. Paper doesn't like to slide smoothly off the stack in the tray when there's printing on the back side. That's an especially bad problem if you print a stack of paper, and then feed the stack back through the printer again to print on the back side. The pages will stick together. The rubber "feet" above the feed tray don't like to push against printed paper, where the black areas are much slicker than the unprinted white paper. It's usually not a problem with a fairly new printer, but after the rubber feet get worn and slick, things tend to slide. Since there are other laser printers that don't have this problem, I can only conclude that HP LaserJets have inferior feed mechanisms. Yep, but there's a bit of a complexication. HP likes to built printers that have a small footprint. That means that the paper trays, which are always at the bottom of the pile, have to feed the paper to the printer after making a 180 degree tight turn out from the tray. The Panasonic 450(???) printer you mentioned had an externally projecting paper tray, that allowed for a more straight line paper input feed. That 180 degree turn is always a problem. However, I do agree that HP could do a better job with their feed mechanisms. The fix is rather simple. The typical Laserjet has the absolute minimum amount of rubber in contact with the paper. Large copiers have similar mechanism, but with much larger rollers on both sides of the paper to maximize grip. They also have much thicker and softer rubber feed rollers to maximize friction. If you want a really reliable paper feed, it will look like a straight line offset press. If you look carefully at the typical HP Laserjet, there are at least 5 feeds. I'll use the HP LJ 4000 as an example. The first is a simple roller in the paper tray to get the paper started. After a 180 degree curling turn, it goes to 4 D-shaped pickup rollers, which really do the work. Under the paper is the separation roller, which supplies pressure to the imaging drum. The paper then gets fed into the fuser roller, and then to a series of exit rollers. Any one of these can screwup and cause feed problem. Most common is the separation roller, which is made of foam, getting clogged with toner. Next is the polishing of the D-shaped pickup rollers from sliding across the paper when the feed rollers slip slightly. The paper tray input roller usually feeds correctly, but the paper can jam up against dirt and filth on the tray in the area around the feed roller. Shredded paper in the fuser assembly will usually stop the paper and cause a jam. Exit rollers are usually fairly reliable, except when the fuser craps out and the rollers get covered with toner. And I do know what the hell I'm talking about: in a previous life I was a printer (as in a real printing press, not desktop computer printers), so I've dealt with lots of machines that eat paper. Full disclosu I sometimes fix HP Laserjet printers. However, I'm not factory trained or authorized. In the 1970's, I briefly owned a commercial print shop. Mostly AB Dick and some Gestetner. I didn't do the printing, but I sure got the complaints when they didn't work. I also ran the college print shop and got some experience on hot lead Linotype presses and Compugraphic (Harris) typesetters. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
#14
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Laser printer gloat
On 11/3/2009 10:25 PM Jeff Liebermann spake thus:
However, I do agree that HP could do a better job with their feed mechanisms. The fix is rather simple. The typical Laserjet has the absolute minimum amount of rubber in contact with the paper. Large copiers have similar mechanism, but with much larger rollers on both sides of the paper to maximize grip. They also have much thicker and softer rubber feed rollers to maximize friction. If you want a really reliable paper feed, it will look like a straight line offset press. Yeah; if only we could have desktop printers with feeders as reliable as the one on the Heidelberg Speedmaster I used to "own" ... now *that's* a feeder! -- Who needs a junta or a dictatorship when you have a Congress blowing Wall Street, using the media as a condom? - harvested from Usenet |
#15
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Laser printer gloat
David Nebenzahl Inscribed thus:
This inspired by the mini-thread in the thread up yonder about HP DeskJet printers. Actually something of a reverse gloat, along the lines of "my old printer still works; does yours?". Got my HP LaserJet 2100M (600 DPI w/PostScript capability) ca. 2000. Not only is the printer still working perfectly, but I'm still using the same cartridge I got with it! Which is a little puzzling; while the printer hasn't exactly been used in a production environment, I have put plenty of pages through it: printed out many entire manuals, etc. I'm just waiting for the cartridge to empty out, but it still hasn't come close. (I even have a 2nd cartridge I got with the printer, still in its foil package.) If I remember correctly the toner cartridge was good for about 10K pages. One thing I really don't like about this, and really most HP printers that I've used, is that it hates to print on the back of printed sheets. Usually it eats/shreds about half the sheets one tries to print this way. Yeah, I know, you can get HPs with "duplex" options, but to me, that's utter bull****. I remember the old Panasonic laser printer my old office had. It was a huge beast, and certainly no better than the HP we also had at the time (LJ 4???), but the Panasonic would feed *any* paper you put into it, even if it had just been run through the printer on one side. I'd always use it to print out my manuals on 2 sides for proofing. Other than this, the LaserJet is a fine piece of equipment. The old Panasonic's were great printers ! As you remark it would print on anything including the back of already printed sheets. Ours was used with two and three part NCR paper. The hard part was the software to ensure that it registered and collated properly. The bottled toner was very cheap as well which made the machine very economical compared to similar machines. -- Best Regards: Baron. |
#16
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Laser printer gloat
On Tue, 03 Nov 2009 16:56:06 -0800, David Nebenzahl
wrote: This inspired by the mini-thread in the thread up yonder about HP DeskJet printers. Actually something of a reverse gloat, along the lines of "my old printer still works; does yours?". Got my HP LaserJet 2100M (600 DPI w/PostScript capability) ca. 2000. Not only is the printer still working perfectly, but I'm still using the same cartridge I got with it! My *OLD* apple laserjet II is on it's bizillionth cartridge and still printing. We do bulk printing of both card stock for bin lables, and product instruction sheets (quality is really not the most important factor for these...) We tell it to print a 100 sheet group (limited by that tiny tray!) and set it going. Later someone grabs the sheets, reloads the tray and off it goes again. We are (sadly, or gladly, not sure) migrating to high speed Xerox printers. Easily ten times faster than that Apple, and 500 sheet trays too. Then the LWII retires to just bin label cards, something that is done about two times a month. |
#17
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Laser printer gloat
On Tue, 03 Nov 2009 19:34:53 -0700, D Yuniskis
wrote: Unfortunately, even printing 8.5x11 photos (i.e., 100% ink coverage) I haven't been able to "empty" any of them! You are just not printing enough! You've either got bad rollers, a bad fuser or "off brand" toner. Pickup rollers probably, clean with acetone as a first step try. Then replace 'em. ... I couldn't *kill* my LJii! I finally had to get rid of it as the electric costs were ridiculous (though the toner carts were awful cheap!) Make a wonderful space heater for winter, however. Keeps my office toasty warm! |
#18
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Laser printer gloat
Nope. Not the problem. It's inherent in the lousy HP feeder design. I've
never seen a LaserJet that would print on the back side of just-printed sheets even when brand new. My 4M will. However, there's no question that it's not a bad idea to let the paper cool down and flatten out. |
#19
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Laser printer gloat
On Tue, 03 Nov 2009 23:30:22 -0800, David Nebenzahl
wrote: Yeah; if only we could have desktop printers with feeders as reliable as the one on the Heidelberg Speedmaster I used to "own" ... now *that's* a feeder! Ummm.... su http://www.heidelberg.com/www/html/en/content/overview1/products/sheetfed_overview-qg I'm not familiar with it, but my guess is that it uses vacuum pickup to handle large format and heavy items, such as box cardboard. Such technology doesn't scale well for the home and small biz printer. Ignoring the size, price tag, skill level, ink handling, and required accessories (i.e. dryer), the home version of this beast would probably make so much noise that it would be unsellable. Still, it might be possible to borrow some of the paper handling technology and use it for small printers. For example, instead of pick and plop vacuum paper handling, the feed rollers could use vacuum to grab, hold, and eventually release the paper. I suspect that this may also become a vacuum cleaner, sucking up dust and filth from the surroundings, but that can be handled by occasionally reversing the air flow and blasting the dust back into the owners face, until they get the clue. Having seen miniature engines, metal working machinery, and automobiles, I suspected that someone might build a miniature offset press that could be adaptable for home use. There's a 1937 patent: http://www.google.com/patents/about?id=fOo-AAAAEBAJ&dq=2099962 which is not very useful. Google found some vendors in China and India that sell miniature offset presses. However, their idea of miniature is about the size of refrigerator. I couldn't find anything the size of a typical inkjet printer. So, there's your dot.com opportunity. Design and sell mini-Heidelberg style offset presses for those home users that need to print on all manner of wrinkled, pre-printed, warped, filthy, and disgusting paper without a paper jam. Incidentally, forget about cut sheet paper. Roll feed is far faster, cheaper, and generally better. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
#20
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Laser printer gloat
On Wed, 04 Nov 2009 13:12:18 +0000, baron
wrote: The old Panasonic's were great printers ! As you remark it would print on anything including the back of already printed sheets. Ours was used with two and three part NCR paper. The hard part was the software to ensure that it registered and collated properly. The old Panasonic KX-4450 series laser printers were awful. When clean, they would work just fine. They didn't jam because the projecting paper trays would simulate a straight line paper path. They did bar codes, which was a big attraction at the time. However, keeping them running and clean was a challenge. I had one in a machine shop that was as good as dead after about 30,000 pages. Another was in a small factory next to a farm that ate enough dirt to destroy almost all the rubber parts. The toner overflow mechanism was messy and would frequently dump toner everywhere. It was instant quality problems from "clumping" if someone dumped the "waste" toner back into the toner bin. Much as I liked the economy of the bottled toner, it was messy to refill. Because of the open toner bin construction, I couldn't keep it clean with an air hose. There were two in relatively clean environments that lasted to about 70,000 pages, but they required almost constant cleaning to remain functional. The bottled toner was very cheap as well which made the machine very economical compared to similar machines. True. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
#21
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Laser printer gloat
On 11/4/2009 8:01 AM Jeff Liebermann spake thus:
On Tue, 03 Nov 2009 23:30:22 -0800, David Nebenzahl wrote: Yeah; if only we could have desktop printers with feeders as reliable as the one on the Heidelberg Speedmaster I used to "own" ... now *that's* a feeder! Ummm.... su http://www.heidelberg.com/www/html/en/content/overview1/products/sheetfed_overview-qg I'm not familiar with it, but my guess is that it uses vacuum pickup to handle large format and heavy items, such as box cardboard. Yes. Like most real printing presses (as opposed to smaller "presses" that are somewhat disparagingly called "duplicators"), the feeder uses vacuum pickup, assisted by air blowers to separate the top sheets of the stack. The Heidelberg feeder was pretty cool: it somewhat counterintuitively picked up the sheet at the *back* and fed it forward. Really cool to see a "stream" feeder in operation. When properly adjusted, performs flawlessly. Still, it might be possible to borrow some of the paper handling technology and use it for small printers. For example, instead of pick and plop vacuum paper handling, the feed rollers could use vacuum to grab, hold, and eventually release the paper. That would be kewl. Having seen miniature engines, metal working machinery, and automobiles, I suspected that someone might build a miniature offset press that could be adaptable for home use. There's a 1937 patent: http://www.google.com/patents/about?id=fOo-AAAAEBAJ&dq=2099962 which is not very useful. Google found some vendors in China and India that sell miniature offset presses. However, their idea of miniature is about the size of refrigerator. I couldn't find anything the size of a typical inkjet printer. Ackshooly, the AB Dick 320 offset duplicator was a table-top model only slightly larger than the larger laser printers of the early days. I first learned to print on one of those, using direct paper plates (you typed and wrote directly on the plate using special ribbons and pencils, almost like a mimeograph). But the 320, being a dinky "press", used friction feed (rubber rollers) which of course isn't nearly as good as vacuum feed. -- Who needs a junta or a dictatorship when you have a Congress blowing Wall Street, using the media as a condom? - harvested from Usenet |
#22
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Laser printer gloat
Jeff Liebermann wrote:
About 10 years ago, I maintained a few HP4 series printers. A billing service had one with 300,000 pages. I replaced some minor plastic parts that had worn out, and I think it ran for another 20,000 pages before being retired. My HP4Plus went to about 130,000 pages. I know of several others that are around 100,000 pages. Yep, they last as do the older HPII and HPIII series printers. I know of at least one LJ4050 that's over a million pages, and others approaching that. The fusers wear out a bit earlier than predicted (170-180K pages instead of 200K) and of course they've been through a couple of sets of rollers. My old LJ4M still works, but it's not anywhere near the class of those printers. Sometimes "new and improved" is actually true. -- Warren Block * Rapid City, South Dakota * USA |
#23
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Laser printer gloat
On 4 nov, 15:40, Roger Blake wrote:
On 2009-11-04, David Nebenzahl wrote: Got my HP LaserJet 2100M (600 DPI w/PostScript capability) ca. 2000. Not only is the printer still working perfectly, but I'm still using the same cartridge I got with it! My Canon LBP-430 (same as an HP LaserJet 4L) is still soldiering on after 15 years. I have changed the cartridge a couple of times, and recently scored a few very inexpensive toners at a thrift store to keep it going another 15 years. :-) I have a canon LBP-4u which is also a Laserjet 4L in disguise. It was a skip find a few years ago, and works like a champ. I also salvaged some 4l toners to use with it should the need arise. Not sure what resolution it is, I think it could probably be better in this department. -B |
#24
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Laser printer gloat
On Thu, 05 Nov 2009 07:45:31 -0500, Meat Plow
wrote: They upgraded to a 6p dual tray and gave me the 4 rather than binning it. That was in 2001. About 6 months ago, also I recycled 3ea HP LJ 6p printers I was saving for parts. I was down to one customer with a 6mp so it wasn't worth saving much. I needed the space more than the parts. I built up one printer and gave it to the neighbors kids. No complaints so I guess they're either using it effectively for school work, or have totally destroyed it by now. The 6p was reasonably state-o-de-art in 2001 but is a loser by today's standards. It's very slow (8ppm), very slow to start (90 sec), a slight power hog, and a desk space hog. 600dpi is ok for everything except photographs. There are a few minor mechanical issues, but basically it's a decent printer (once it warms up). I don't like the large footprint, but the fairly low profile offers opportunities to hide the printer where the taller equivalents (i.e. LJ4) don't fit. As long as the rubber parts are clean and soft, I haven't seen many paper misfeeds. The HP 03A toner cart is rated at about 4000 pages (at 5% coverage), and seems to deliver (I've never kept track). Most of the real failures I've seen on the HP LJ 6p series were blown electronics. There doesn't seem to be a pattern as most were caused by power glitches which seems to do random damage. I usually replace the main pickup roller on the 6P and similar construction 4P when diving in because it usually requires total disassembly to replace the roller and I might as well do it while disassembled. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
#25
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Laser printer gloat
On 11/5/2009 7:05 PM Bob Larter spake thus:
David Nebenzahl wrote: On 11/3/2009 9:39 PM Bob Larter spake thus: It'll work better if you ensure that you print on the correct side of the sheet first. Check your paper packet for an arrow, & a label saying "Print this side first", & load your paper tray accordingly. It'll also help to riffle the stack of paper before loading it into the cartridge. Give the paper cartridge a shake to even up the edges before putting it in the printer. I've done all those things; none of them make the slightest difference. (As a former printer, it's an automatic reflex for me to fan paper before inserting it into a paper-eating machine.) Well, something is clearly wrong. I serviced Canon-engine lasers for many years, & all the larger models (ie; with more metal than plastic, such as the CX, SX & MX engines) had really good paper-handling, & could cope just fine with double-sided printing. Yes, but those were Canon-engine printers, not HPs. As Jeff L. pointed out, the HP design suffers from an abrupt turn right at the paper-pickup point, which seems to be the snag that makes printing on just-printed sheets very problematic. Believe me, I've tried this many, many times, as I prefer to print long documents on both sides of the paper. -- Who needs a junta or a dictatorship when you have a Congress blowing Wall Street, using the media as a condom? - harvested from Usenet |
#26
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Laser printer gloat
In article ,
Bob Larter wrote: David Nebenzahl wrote: On 11/3/2009 9:39 PM Bob Larter spake thus: David Nebenzahl wrote: One thing I really don't like about this, and really most HP printers that I've used, is that it hates to print on the back of printed sheets. Usually it eats/shreds about half the sheets one tries to print this way. Yeah, I know, you can get HPs with "duplex" options, but to me, that's utter bull****. I remember the old Panasonic laser printer my old office had. It was a huge beast, and certainly no better than the HP we also had at the time (LJ 4???), but the Panasonic would feed *any* paper you put into it, even if it had just been run through the printer on one side. I'd always use it to print out my manuals on 2 sides for proofing. It'll work better if you ensure that you print on the correct side of the sheet first. Check your paper packet for an arrow, & a label saying "Print this side first", & load your paper tray accordingly. It'll also help to riffle the stack of paper before loading it into the cartridge. Give the paper cartridge a shake to even up the edges before putting it in the printer. I've done all those things; none of them make the slightest difference. (As a former printer, it's an automatic reflex for me to fan paper before inserting it into a paper-eating machine.) Well, something is clearly wrong. I serviced Canon-engine lasers for many years, & all the larger models (ie; with more metal than plastic, such as the CX, SX & MX engines) had really good paper-handling, & could cope just fine with double-sided printing. The old Apple LaserWriters with Canon engines are nearly unkillable, if a bit slow. The most jam-prone printer I ever saw, though, had a Xerox engine! You'd think that if anybody knew about paper handling, it'd be them... Isaac |
#27
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Laser printer gloat
Hi!
Actually something of a reverse gloat, along the lines of "my old printer still works; does yours?". Since you asked, yes, it did. I had an HP LaserJet III that I ran the page counter over to all zeroes. All it ever asked for was the odd new pick roller and toner. It never gave any power supply trouble. In fact, the only thing it didn't have was enough installed memory to handle some jobs. It worked great until a basement flood came along. And it might have worked even then, but it disappeared before I could even try to clean it and see what would happen. It was pretty weird seeing a printer that old reporting a page count of a few hundred after it rolled over. More recently, I saw a Sharp AR-M450P unit make 1.5 million copies with only routine maintenance. Ironically enough, it was more reliable than the newer (330,000 copies) AR-M450 that replaced it. Which is a little puzzling; while the printer hasn't exactly been used in a production environment, I have put plenty of pages through it: printed out many entire manuals, etc. I'm just waiting for the cartridge to empty out, but it still hasn't come close. (I even have a 2nd cartridge I got with the printer, still in its foil package.) Maybe you got a never-ending cartridge? :-) Or perhaps it is in the page coverage percentage. Printer makers express toner cartridge life at a given % of coverage on a page. I think the usual figure is based on a 10% coverage. If I'm remembering it right, 10% coverage on a page is actually a lot closer to being "fully loaded" than you'd think. but the Panasonic would feed *any* paper you put into it, even if it had just been run through the printer on one side. I'd always use it to print out my manuals on 2 sides for proofing. Evidently nobody ever told their dot-matrix printer design team that it was possible to do this. I had a KX-P2123 whose tractor feed had to be set up *precisely* or it would tangle and eat the paper. I knew of many others that had the same problem. I finally dumped it in favor of an Epson ActionPrinter T1000 (a printer that proved so tough that vandals with a baseball bat couldn't break it). I haven't powered it on in a while, but I'm sure it would still work fine. William |
#28
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Laser printer gloat
On Fri, 06 Nov 2009 13:05:41 +1000, Bob Larter
wrote: Well, something is clearly wrong. I serviced Canon-engine lasers for many years, & all the larger models (ie; with more metal than plastic, such as the CX, SX & MX engines) Ummm... I think you mean CX, SX, and NX. There is no MX. http://www.printerworks.com/Catalogs/LaserJets.html All the HP (something)X LaserJet printers were made by Canon. had really good paper-handling, & could cope just fine with double-sided printing. Let me try to explain again, for the third time (with some additions). The printers expect the pages to be flat. Pages that have gone through the printer tend to be slightly warped. You can demonstrate this by finding a truly flat and smooth surface, and plopping a piece of printed paper onto this surface. Flip it over and compare how it lies on the flat surface to that of a clean unprinted page. It invariable has a lump on one side or other. That's fatal to many feed mechanism, especially those that use only a single foot or roller in the middle of the page. Remelting the toner on the back side of the page sometimes causes the toner to stick to the rubber roller in the fuser, causing exit jams. Take a page of recently printed paper and slide an unprinted page over the printed page on the flat surface. If you're careful, you can feel the increased and erratic drag. If your not a believer, hang an alligator clip on the end of a fish scale. Plop the printed page into a stack of new unprinted paper. Pull and measure the tension required to pull the paper out of the stack. Now, do the same think with an unprinted page. Depending on the height of the stack, the printed page has increased drag over the unprinted page. Yes, I know that the printer does not pull paper from the middle of the stack. The weight of the paper pile is to simulate the pressure supplied by the rubber feed roller. That's an especially bad problem if you print a stack of paper, and then feed the stack back through the printer again to print on the back side. The pages will stick together because the black plastic toner is fairly lumpy and slightly sticky. Printing on the back side also tend to transfer some toner from the back side to the rubber roller in the fuser assembly. The HPII and HPIII were especially bad at leaving impressions on the roller. Later printers uses a mylar sheet between the fuser and the rubber roller. Reheated toner on the back of the page would not stick to the mylar. The rubber "feet" above the feed tray don't like to push against printed paper, where the black areas are much slicker than the unprinted white paper. It's usually not a problem with a fairly new printer, but after the rubber feet get worn and slick, things tend to slide. I just fixed an HP 4000 printer with this problem. In my never humble opinion, the Canon printer feed mechanism sucks. It's major problems are the reliance on a single rubber feed roller located in the middle of the page. When everything is proper (new rubber, good flat 20 lb paper, no printing on the back, etc), it works just fine. When something changes, it has so little friction surface, that it screws up badly. If there's any crud in mechanism, the center feed will cause the leading edge to misalign or corrugate, resulting in a guaranteed paper jam. The solution was provided in the 4000 thru 4300 series printers (and some others). It has 4ea "D" shaped rubber feet to feed the paper off the top of the stack. If one foot slips a little because it's sitting on some printing or a bulge, the others will still feed the page in a fairly straight line. The "D" feet are also very easy to replace. These later printers also solved another problem. The HP LJ4 series had two sets of coupled rollers contact the paper at the same time. If there was even a slight difference in roller diameter, the paper would either wrinkle, or the rollers would slip, and the paper would jam. Bad design. This was fixed in later models by either having only one set of rollers make contact, or adding a clutch to allow for changes in roller diameter. Incidentally, the HP4300 records the number of pages printed on a chip attached to the toner cart. The printer records errors including paper jams. I just connected to a customers network via VNC and looked at their 4300 log file. About 10,000 pages on the toner cart with 8 paper jams. I don't think I could ever come close to that with a Canon SX series printer. This particular machine has a duplexer, but it's normally not used for tax returns. I've seen this printer grind through piles and piles of printed tax returns without ever jamming. Their previous printer was an HP4si, which would jam at least 2-4 times per ream of paper. -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
#29
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Laser printer gloat
On Fri, 06 Nov 2009 06:28:37 GMT, "William R. Walsh"
m wrote: Or perhaps it is in the page coverage percentage. Printer makers express toner cartridge life at a given % of coverage on a page. I think the usual figure is based on a 10% coverage. HP originally used 5%. That resulted in yields for US and EU being slightly different due to the differences between letter size and A4 size paper. Since 2004, everyone uses ISO/IEC 19752. More on how page yield is measured: http://www.hp.com/pageyield/articles/us/en/MonoLaserJetYieldArticle.html http://en.wikipedia.org/wiki/ISO/IEC_19752 -- Jeff Liebermann 150 Felker St #D http://www.LearnByDestroying.com Santa Cruz CA 95060 http://802.11junk.com Skype: JeffLiebermann AE6KS 831-336-2558 |
#30
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Laser printer gloat
On Thu, 05 Nov 2009 21:12:44 -0800, isw wrote:
In article , Bob Larter wrote: David Nebenzahl wrote: On 11/3/2009 9:39 PM Bob Larter spake thus: David Nebenzahl wrote: One thing I really don't like about this, and really most HP printers that I've used, is that it hates to print on the back of printed sheets. Usually it eats/shreds about half the sheets one tries to print this way. Yeah, I know, you can get HPs with "duplex" options, but to me, that's utter bull****. I remember the old Panasonic laser printer my old office had. It was a huge beast, and certainly no better than the HP we also had at the time (LJ 4???), but the Panasonic would feed *any* paper you put into it, even if it had just been run through the printer on one side. I'd always use it to print out my manuals on 2 sides for proofing. It'll work better if you ensure that you print on the correct side of the sheet first. Check your paper packet for an arrow, & a label saying "Print this side first", & load your paper tray accordingly. It'll also help to riffle the stack of paper before loading it into the cartridge. Give the paper cartridge a shake to even up the edges before putting it in the printer. I've done all those things; none of them make the slightest difference. (As a former printer, it's an automatic reflex for me to fan paper before inserting it into a paper-eating machine.) Well, something is clearly wrong. I serviced Canon-engine lasers for many years, & all the larger models (ie; with more metal than plastic, such as the CX, SX & MX engines) had really good paper-handling, & could cope just fine with double-sided printing. The old Apple LaserWriters with Canon engines are nearly unkillable, if a bit slow. The most jam-prone printer I ever saw, though, had a Xerox engine! You'd think that if anybody knew about paper handling, it'd be them... My Xerox (a 5400) has been very good, about one jam every six months (usually after loading the tray). Does reasonably on double sided, but not perfect (I really would like to get the duplexer option, and am watching eBay for one). I actually am picking up a second 5400 this morning, too, for either spare or second use. |
#31
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Laser printer gloat
David Nebenzahl wrote:
Nope. Not the problem. It's inherent in the lousy HP feeder design. I've never seen a LaserJet that would print on the back side of just-printed sheets even when brand new. I've done it all the time on LaserJet II, III, 4m, and 5 printers. (I often keep a tray full of scrap paper that's already printed on one side.) It works best if the paper has chance to cool and lose its curl, though. If it's hot out of the machine you may have problems. Sometimes if the weather is try the paper will come out with a static charge that makes it stick together and misfeed, too. |
#32
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Laser printer gloat
D Yuniskis wrote:
I couldn't *kill* my LJii! I finally had to get rid of it as the electric costs were ridiculous (though the toner carts were awful cheap!) The fuser eventually went out on my II, after many years. I got rid of it and replaced it with a heavily (ab)used 4m, surplus from a college computer lab. Used that for three or four years until the output rollers got too warn and it started to jam; I could have fixed it, but at that point I was sick of how slow it was, so I went to the local computer recycler and bought a lightly used 2300n. These HP laser printers are so cheap on the used market and hold up so well in home use. |
#33
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Laser printer gloat
David Nebenzahl wrote:
On 11/5/2009 7:05 PM Bob Larter spake thus: Well, something is clearly wrong. I serviced Canon-engine lasers for many years, & all the larger models (ie; with more metal than plastic, such as the CX, SX & MX engines) had really good paper-handling, & could cope just fine with double-sided printing. Yes, but those were Canon-engine printers, not HPs. The HP LaserJet II, III, and 4 series printers all used Canon print engines. As Jeff L. pointed out, the HP design suffers from an abrupt turn right at the paper-pickup point, which seems to be the snag that makes printing on just-printed sheets very problematic. The II and III suffer least from that problem, because their trays project out the front. It makes them very bulky, though. |
#34
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Laser printer gloat
On Tue, 03 Nov 2009 16:56:06 -0800, David Nebenzahl wrote:
This inspired by the mini-thread in the thread up yonder about HP DeskJet printers. Actually something of a reverse gloat, along the lines of "my old printer still works; does yours?". Got my HP LaserJet 2100M (600 DPI w/PostScript capability) ca. 2000. Not only is the printer still working perfectly, but I'm still using the same cartridge I got with it! Our home office printer is an HP LJ III which we purchased new on July 27, 1990. I have the exact date at hand because we came across the canceled check several years ago and taped it to the cover of the printer. $1,872.50 - IN 1990 US$$$!! All-in-all, I've been able to keep it supplied with toner cartridges by buying them in unopened boxes at 2nd-hand stores-- which were no doubt dropped off by folks that just had to 'upgrade' to the troublesome inkjet printers. Admittedly, it does not get heavy use. The only repair I've had to do to it is replace the fuser assy -- about 2 years ago. Jonesy -- Marvin L Jones | jonz | W3DHJ | linux 38.24N 104.55W | @ config.com | Jonesy | OS/2 * Killfiling google & XXXXbanter.com: jonz.net/ng.htm |
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