Taking apart LS4000
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From: Guillaume Dargaud on 19 Jan 2008 07:47 Hello all, quite a while ago I posted here about cleaning my LS4000. Thanks to your help and some web tutorials, I managed to clean the filthy mirror, but the scans were still exhibiting the same problems to a lesser extend. Today I sat down and decided to clean the lens... but I can't figure out how to access it. I particular I cannot figure out how to remove the circuit board: there's a ribbon in the middle of it that I'd need to disconnect, but it's totally non accessible. There are several pages with detailed photos on how to take appart Nikon Scanners: LS5000, LS2000 and some others but they don't seem to apply to the 4000. Any hint ? -- Guillaume Dargaud http://www.gdargaud.net/Antarctica/
From: Barry Watzman on 19 Jan 2008 10:40 I service LS-2000's and LS-30's, but at this time not the later models. I have a 4000 and have looked at it, it is more complex than the 2000/30 but does not look impossible by any means. I was under the impression that the LS-4000 and 5000 mechanisms were similar (as I said, I have a 4000 but have never seen a 5000). The flat ribbon cables (these are called "flex cables") goes into a ZIF (zero insertion force) socket. The socket has an "open" (unlocked) and "closed" (locked) position ... in the open position, there is NO force on the cable and it moves in and out freely. The socket MUST be in the open position to insert or remove the flex cable, if you force the cable while the socket is locked, you will likely destroy the cable (and sometimes the socket). There are different styles of these connectors, so I can't tell you exactly how to open the style that you have, but you will have to figure that out before you will be able to disassemble it. On most of them, there is a piece that moves up or down to open or close the socket. Guillaume Dargaud wrote: > Hello all, > quite a while ago I posted here about cleaning my LS4000. Thanks to your > help and some web tutorials, I managed to clean the filthy mirror, but the > scans were still exhibiting the same problems to a lesser extend. > > Today I sat down and decided to clean the lens... but I can't figure out how > to access it. I particular I cannot figure out how to remove the circuit > board: there's a ribbon in the middle of it that I'd need to disconnect, but > it's totally non accessible. > > There are several pages with detailed photos on how to take appart Nikon > Scanners: LS5000, LS2000 and some others but they don't seem to apply to the > 4000. Any hint ?
From: Guillaume Dargaud on 20 Jan 2008 12:17 Thank Barry for the answer. I see how the ribbon works, the problem is that one is unaccessible. Maybe with a long narrow pair of pliers... Actually here's the trick: The ribbon arriving in the middle of the board goes through a holding collar just before. This collar is held by a screw which is far inside the scanner but accessible with a long screwdriver. If you unscrew it, then the ribbon has enough leeway so that you can move the board 5cm away, put your hand inside and disconnect it. It works in reverse for reassembling it. Still, accessing the lens is lots of hard work, and obviously I now have one (tiny) screw left after reassembling the whole thing. If anybody has an idea I wrote 'side' next to it ! Cleaned up and reassembled scanner just did its first scan with success... Darks are now much better. -- Guillaume Dargaud http://www.gdargaud.net/Antarctica/ "I was in a shop in Britain, when an American tourist in front of me tried to pay for something in US dollars. The shop keeper politely told her that this was Britain, and you can't use U.S. dollars here. The lady replied... 'But I had no problems in other third world countries'." - KJ.
From: tomm42 on 21 Jan 2008 08:43 On Jan 20, 12:17 pm, "Guillaume Dargaud" <USE_MY_WEB_F...(a)gdargaud.net> wrote: > Thank Barry for the answer. > I see how the ribbon works, the problem is that one is unaccessible. Maybe > with a long narrow pair of pliers... Actually here's the trick: > > The ribbon arriving in the middle of the board goes through a holding collar > just before. This collar is held by a screw which is far inside the scanner > but accessible with a long screwdriver. If you unscrew it, then the ribbon > has enough leeway so that you can move the board 5cm away, put your hand > inside and disconnect it. It works in reverse for reassembling it. > > Still, accessing the lens is lots of hard work, and obviously I now have one > (tiny) screw left after reassembling the whole thing. If anybody has an idea > I wrote 'side' next to it ! > > Cleaned up and reassembled scanner just did its first scan with success... > Darks are now much better. > -- > Guillaume Dargaudhttp://www.gdargaud.net/Antarctica/ > "I was in a shop in Britain, when an American tourist in front of me tried > to pay for something in US dollars. The shop keeper politely told her that > this was Britain, and you can't use U.S. dollars here. The lady replied... > 'But I had no problems in other third world countries'." - KJ. My LS2000 had totally died, Nikon cleaned/repaired it for $300 two years ago. Seemed like a good deal to me. Tom
From: Barry Watzman on 21 Jan 2008 20:48
I charge $95 (plus $20 return shipping), and from reports of people who have used Nikon, I do a more complete job. They apparently do what's necessary to get the unit working (and at least some of the time no more). I strip it down to pretty much the last screw, solvent clean all the moving parts, relubricate, clean the optics & reassemble. $300 for an LS-2000 is just about if not more than the scanner is worth. tomm42 wrote: > > > My LS2000 had totally died, Nikon cleaned/repaired it for $300 two > years ago. Seemed like a good deal to me. > > Tom |