Cleaning lenses inside
in [Scanners]
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From: Timothy Lange on 9 Oct 2009 14:44 I would try moderate air, probably from a can, and work my way up the pressure settings until the obstructions are gone. Would also minimize disassembly. Tim.
From: Don Phillipson on 9 Oct 2009 11:28 >> "Don Phillipson" <ey925(a)ncfSPAMBLOCK.ca> wrote: >> >>> What chance of cleaning the lenses inside a Canon >>> FS4000US Film scanner? This is an old unit bought >>> used, but it looks as if an untidy spider has taken >>> up residence inside . . . "Barry Watzman" <WatzmanNOSPAM(a)neo.rr.com> wrote in message news:hamle7$e00$1(a)news.eternal-september.org... > The list of things that can go wrong is quite lengthy. Some parts of a > scanner may be precision aligned at the factory on an optical test jig; > and when you "just take it apart" ... that alignment is lost (on a Nikon > LS-2000, there are 4 screws that, if removed or even just loosened, will > usually destroy the scanner). You have no idea how many people do not > know how to work the ZIF connectors on "Flex Cables" (those thin, flat > ribbon cables used in a lot of equipment). Also, on some scanners there > are a LOT of "flex cables" and they tear VERY easily, they cannot be > repaired, and in some cases replacements are either difficult to get or > not available at all. I could go on, but the answer to "what can go > wrong" is: LOTS OF THINGS. MOST untrained people who take these things > apart without instructions do damage to them. Thanks for practical advice: plan now is: 1. Vacuum slide scanner from outside (and operate and store it in as dust-free a location as I can manage.) 2. Continue scanning slides (from the 1960s, many unseen for decades, half badly faded) 3. Test Photoshop on a couple of well-chosen samples, including those with dust/spider marks. 4. If this cleanup remains unsatisfactory, then I shall take off the cover to assess interior components. -- Don Phillipson Carlsbad Springs (Ottawa, Canada)
From: Barry Watzman on 9 Oct 2009 20:17 The best way to clean is with compressed air, not a vacuum. There is very little risk in removing covers. Once you get inside, you have to be more cautious. Don Phillipson wrote: >>> "Don Phillipson" <ey925(a)ncfSPAMBLOCK.ca> wrote: >>> >>>> What chance of cleaning the lenses inside a Canon >>>> FS4000US Film scanner? This is an old unit bought >>>> used, but it looks as if an untidy spider has taken >>>> up residence inside . . . > > "Barry Watzman" <WatzmanNOSPAM(a)neo.rr.com> wrote in message > news:hamle7$e00$1(a)news.eternal-september.org... > >> The list of things that can go wrong is quite lengthy. Some parts of a >> scanner may be precision aligned at the factory on an optical test jig; >> and when you "just take it apart" ... that alignment is lost (on a Nikon >> LS-2000, there are 4 screws that, if removed or even just loosened, will >> usually destroy the scanner). You have no idea how many people do not >> know how to work the ZIF connectors on "Flex Cables" (those thin, flat >> ribbon cables used in a lot of equipment). Also, on some scanners there >> are a LOT of "flex cables" and they tear VERY easily, they cannot be >> repaired, and in some cases replacements are either difficult to get or >> not available at all. I could go on, but the answer to "what can go >> wrong" is: LOTS OF THINGS. MOST untrained people who take these things >> apart without instructions do damage to them. > > Thanks for practical advice: plan now is: > 1. Vacuum slide scanner from outside (and operate and store it in as > dust-free a location as I can manage.) > 2. Continue scanning slides (from the 1960s, many unseen for > decades, half badly faded) > 3. Test Photoshop on a couple of well-chosen samples, > including those with dust/spider marks. > 4. If this cleanup remains unsatisfactory, then I shall take off > the cover to assess interior components. >
From: DevilsPGD on 10 Oct 2009 20:39
In message <hamle7$e00$1(a)news.eternal-september.org> Barry Watzman <WatzmanNOSPAM(a)neo.rr.com> was claimed to have wrote: >The list of things that can go wrong is quite lengthy. <snipped list> Resulting in... A broken/useless scanner. Since the scanner is starting out useless, what's the harm? |