How to open Epson 4990 scanner body?
in [Scanners]
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From: Guido Haase on 28 Jan 2006 09:22 Hello everybody, in March 2005 I bought an Epson Perfection 4990 Photo. So far I'm very happy about this deal because it's a relatively sheep method to scan my 6x6 transparencies and negatives. Now, using the 4990 nearly one year I accidentally saw a slightly layerof dust one the glass plate mounted in the body (not the top) of the device. After cleaning the upper side of the glass plate I noticed the slightly layer of dust still remains, i.e. it's on the lower side of the glass plate. The dust itself looks like the dust on windshield in your car if it isn't cleaned from inside for a long time. I hope you what I mean. For cleaning this side of the glass plate I'll need to open the body. But, the only screws I see are 4 at the back in the connectors area. Two other ones are placed at the end of the two tetragonal holes where the two brackets of the top have been plugged before lifting it. So my question is, if the body can be opened by removing some of this screws and if so, which one(s) have to be removed. Or if there is any other way to open the body and clean the lower side of the glass plate. May be there's a trick or there are some "hidden" screws which can't be seen directly. May be there is a disassembling manual or exploded drawing available on the web - but where? By the way I've asked the service at Epson. A friendly technician told me that the problem is well known, but Epson isn't willing to give tips for tinkerer. Service manuals or exploded drawings won't be give away. But, it would be up to me to send the scanner for repairing. There'll be an all-inclusive price of 153,- EUR (~ 187,- $ US) for repairing it whatever the damage will be, including the cleaning of the glass plate. In other words this means, if I'll send the scanner for cleaning the glass plate to Epson's Service three times it's the same price like buying a new scanner - nice, isn't it? So please let me know if anyone of you has experience(s) with opening the body and/or cleaning the lower side of the glass plate. Thanks and by for now Guido
From: degrub on 28 Jan 2006 09:58 Do you actually notice any impact on the image ? Guido Haase wrote: > Hello everybody, > > in March 2005 I bought an Epson Perfection 4990 Photo. So far I'm very > happy about this deal because it's a relatively sheep method to scan > my 6x6 transparencies and negatives. > > Now, using the 4990 nearly one year I accidentally saw a slightly > layerof dust one the glass plate mounted in the body (not the top) of > the device. After cleaning the upper side of the glass plate I noticed > the slightly layer of dust still remains, i.e. it's on the lower side > of the glass plate. The dust itself looks like the dust on windshield > in your car if it isn't cleaned from inside for a long time. I hope > you what I mean. > > For cleaning this side of the glass plate I'll need to open the body. > But, the only screws I see are 4 at the back in the connectors area. > Two other ones are placed at the end of the two tetragonal holes where > the two brackets of the top have been plugged before lifting it. > > So my question is, if the body can be opened by removing some of this > screws and if so, which one(s) have to be removed. Or if there is any > other way to open the body and clean the lower side of the glass > plate. > > May be there's a trick or there are some "hidden" screws which can't > be seen directly. May be there is a disassembling manual or exploded > drawing available on the web - but where? > > By the way I've asked the service at Epson. A friendly technician > told me that the problem is well known, but Epson isn't willing to > give tips for tinkerer. Service manuals or exploded drawings won't be > give away. But, it would be up to me to send the scanner for > repairing. There'll be an all-inclusive price of 153,- EUR (~ 187,- $ > US) for repairing it whatever the damage will be, including the > cleaning of the glass plate. > > In other words this means, if I'll send the scanner for cleaning the > glass plate to Epson's Service three times it's the same price like > buying a new scanner - nice, isn't it? > > So please let me know if anyone of you has experience(s) with opening > the body and/or cleaning the lower side of the glass plate. > > Thanks and by for now > > Guido
From: - on 28 Jan 2006 10:14 There is a .pdf file showing how to disassemble the 2450 through 4870 in the files section of the 4870/4990 Users Group (http://groups.yahoo.com/group/epson4870). Exploded parts diagrams are also posted in the files section. The 4990 is similar but I believe it has two more screws under those button caps on the top of the cover. Since the caps are easy to scratch up when taking them out, most people think the screws under the caps help serve as an indicator to the factory that a scanner has been opened (thus voiding the warranty). Therefore, be careful if your scanner is still under warranty. Once person ordered replacement caps from somewhere just in case (I think it was Epson Europe). Doug -- Doug's "MF Film Holder" for batch scanning "strips" of 120/220 medium format film: http://home.earthlink.net/~dougfisher/holder/mainintro.html
From: Guido Haase on 28 Jan 2006 12:42 >Do you actually notice any impact on the image ? Thank you for your reply! There are two things disturbing me: 1. If you scan an unicolored sheet, let's say white or light gray, you can see very light shadowed area, i.e. they dont have a homogeneous color/brightness gradient. 2. There are one small white particle exactly in the for line of the 6x6 MF Filmholer. So each time I scan two pictures without moving the Film in the Filmholder I've to Photoshops tools to remove this pattern. In former times I used AGFA scanners and they recommeded to clean the glasses every 1-1,5 years. Greetinx Guido
From: Guido Haase on 28 Jan 2006 13:32 Hi Doug, many, many thanks for your hint! In the yahoo group I found a manual for dissambling my scanner (and a hint of a very friendly guy about a mistake he made on dissambling his scanner - to prevent others from repeating this mistake) and an exploded drawing - exactly what I wanted and needed and what Epson Germany wasn't willing to give away. But, as you see the world is small, isn't it? The names of this documents - available in file area after joining the yahoo group - are: - Perfection 4990 Photo Exploded Diagram.pdf - Dismantling the Epson Flatbeds.pdf By the way the guy who wrote the dissambling manual has the same problem like me - he wants to remove dust on the lower side of the glas plate. That's internet from it's best side! Thanks to all you are working (on) it in this way Guido
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