In detail: do-it-yourself repair of scanners from a real master for the site my.housecope.com.
Unfortunately, I can’t tell you anything about the repair. I don’t know myself, but I would like to find out from the specialists the repair methods and any other information, literature, links, etc., etc. There is very little information on the repair of scanners on the Internet.
HP ScanJet 5100 scanner.
Fault - the carriage does not find the initial position (after scanning, when returning, the carriage "skips" the initial position and a crack is heard when the gear is turned on the toothed belt). During the repair, it turned out that a strip (of paper.) Serves as the initial position sensor (maybe it has what properties.). The carriage returns with the lamp on and when it hits this strip, it stops. In addition, the distance between the lamp and this strip is important (focusing.). If it is small, as it was in my case, the lamp does not see the strip and skips the initial position. The defect was eliminated by placing washers under the scanner body at the points of its fastening with screws. The length of the scanning field is determined by the number of pulses applied to the stepper motor.
The strip of paper is the border for reading.
I had another UMAX 2100 scanner, so after half a year it began to scan with stripes
different colors, after checking it turned out that the grease on the guide wheel has dried
after a new lubricant began to plow like new.
Often this strip “loses” color and the scanner skips. You stick on a strip of laser paper (it's whiter than the others) and the scanner works like new again.
Why then did the scanner work when the distance from the lamp to the strip of paper changed (see above)?
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Video (click to play). |
The question is certainly interesting.
Perhaps it would have worked with a new strip, one can only assume. And so another method of repair appeared. 
It's just that more than one packard was repaired in this way.
P.S. I wrote a little wrong about the loss of “color”, now I remembered the real reason, the lamp loses its intensity, and there is not enough recoil from the native strip.
HP ScanJet 2400 scanner. Started giving a strip in the middle of the flatbed (strip perpendicular to the scanning direction). Dismantled, removed the train, checked - 2 conductors in the cliff. I rummaged around the service centers, asked about a new loop - no. I had to duplicate the conductors with PVC-sheathed wires (they are pinkish). I began to insert the train into place - the ferrite broke, I somehow blinded it. I turn it on - the scanner started up, went to its original position (by the optocoupler), connected it to the PC - the firewood got up HP 2400 - everything seems to be fine, BUT I try to scan - the message “The lamp is warming up, wait. ”And that's it. After 5 minutes, an error message pops up. Before sealing the loop, he at least scanned half of the image, and now - # $% ^.
I read the previous messages and understood from them that the lamp does not go out on readiness. insufficient brightness of the light from the strip which is located at the beginning of the tablet. I still don't know what to do with the ferrite now - maybe these glitches are due to interference?
Tell me good people.
Thank you gentlemen for the raised topic. What a pity that she did not appear a little earlier. I disassembled the Astra 2000 scanner in which the lamp gave out pink at one end and white at the other end. The image was black all the time. When I took off the lamp, I broke it by accident, but I was not particularly upset, considering that the lamp was still dead. Maybe she was still alive. And, maybe, nothing was needed at all, to change the strip.
lee, the strip is a reflective mark, in some scans this is how the position of the carriage is determined, gluing with a fresh one helped.
Odisee, IMHO I couldn’t worry about ferrite, I didn’t change anything, I would change the strip, and put a lamp to my friend, and look carefully - didn’t I catch anything else?
Vademar, the lamp kirdyk is unambiguous, a slight difference in tones is still niche (I encountered it), but such as you already have an edge. Change.
In general, I think so: with those problems that you have to deal with when repairing scanners (I mean getting spare parts) in our region # 35, just buy cheap HP, and throw it away if it breaks down. 
facks, unfortunately, in our region No. 63 and in our plant in particular, it is easier to buy a spare part, sometimes even in opposition to the logic and pricing policy, but to show the bosses that the item has been repaired and will still work
Scanner Acer s2w 3300 usb on win2000
sometimes it works fine, but there is a bug, the carriage gets stuck in the middle and the ghoul, you can disassemble it by hand and move it normally for a while, it can get stuck anywhere, mostly in the middle, we tried to lubricate the guides, it also doesn't help for long, can anyone meet? scanner since 2000
Maybe the electronics, the sensors wedge, the cable is loose.
The HP scanjet 5p scanner produces a striped image when it scans. what happened? tell
scanner test advises to check cables and data transmission. But in my opinion, everything is in order. error code 2114
what could it be.
I have exactly the same scanner, he is only two months old, he is under warranty, but taking a big problem under warranty for several months can be delayed by the warranty service!
The problem is that the scanner began to scan only to the printer, the information does not appear on the monitor and it became impossible to process it (edit it, for example), while a warning constantly pops up on the monitor that “communication with the device is lost”. From time to time, a heartbreaking squeal occurs in the scanner and the lamp is not installed after scanning to its original position, but is in the middle of the device. Reinstalling the software did not help, so I think to open it myself and try to repair it, but there is no experience with scanners, so I ask for expert advice?
Who knows nothing chtol?
There is a problem, mustek A3SP, there are no drivers for it.
Downloaded from the Russian site and nothing works, it is necessary under Win XP, I downloaded under XP and under 2000, none of them even wants to be installed.
Help plz with a link or maybe someone has such a thing, you need to install it on XP.
3mm), if so, is it possible to change only the edges. Maybe there is an image of such a piece of paper on the Internet to print?
help people are kind. I have an Artek scanner. before the Windows died, it worked fine. now I installed Fine Reader 8.0 before that it was 7.0. so this Fine Reader 8.0 reads kind of bearable, but when the text then enters Word it is impossible to understand anything. signs, the language changes by itself, tables lose their shape. Thank you all in advance.
HP 3530c scanner - does not turn on. The lamp is off, the carriage is in place. Power supply 5 volts is normal. The master generator is running. Assembled on RTSC8801C2-6 (Realtek). Motor driver-L6219DS.
Scanner Mustek 2448CS PLUS
He has such a problem. When scanning to the left in the direction of movement of the matrix, a purple stripe appears, which gradually “evaporates” with the number of scanned images, but does not disappear at all. Maybe someone came across this - how to treat. Or is it a marriage? I will be glad to answer.
HP ScanJet 5300C Scanner. It turns on, the lamp is on, the corot is in place. It clings to a computer via a USB cable. The computer does not see the scanner chronically, installed the native drivers from the disk the same story, when you start the HP Scan program, it gives a message “the program cannot find the scanner”, the cord changed the same story. Maybe someone knows what the problem is 
Everything just happened: I put my own LPT cable and everything worked, but the USB port apparently burned out
And can anyone tell me where to find the schematic diagram of the Mustek 12000SP plus scanner.
And in general, any resources for scanners.
sergeih
This is most likely a matter of the optocoupler that is on the carriage
A scanner is a computer peripheral device. It is designed to convert printed information to digital. These can be texts, photographs, drawings. For what? To send the received information to a computer. Flatbed scanners are very popular. They are the easiest to use.
The main element of a flatbed scanner is the reading sensor. It can be made in the form of CIS-sensors or CCD-matrix, consisting of light-sensitive elements. It is also called a CCD array because the pixels are aligned in one row. The resolution of the device depends on the number of pixels.
The reading sensor moves along the object
Photocells and a light source are enclosed in a special carriage. The fixed transparent glass acts as a work surface. A printed image or text is placed on it. The device has a stepper motor that drives the scanning carriage. She moves along the glass with the page. The light emitted from the lamp is reflected off the paper surface. In a CCD matrix, the reflected light is projected onto photocells using a group of glasses and mirrors. The latter process the luminous flux and convert its strength into an analog signal. In CIS scanners, the principle of operation is similar, but without the participation of the optical system.
CIS sensor has no optical group
Thus, during scanning, the photocells receive a certain voltage value for each line of the image. Further, the generated signal is fed to the analog pulse converter. There it goes into digital format, which can be transferred to a computer for further work.
There are several types of scanning devices:
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lingering. Processes only single sheets, as the image is pulled along the scanning element;
The image is stretched along the scanning element
drum. The image is attached to a rotating cylinder. The luminous flux illuminates the drum and scanning takes place;
The image is attached to the drum
roller. The original is moved by a group of rollers, and copying is done using the CCD;
The paper is moved by rollers
projection. Most often they are used for A3 format processing. The image is placed on a special stand. The rotary sensor scans each line from a distance of 30 cm;
The sensor rotates and scans each line
book. The brochure is placed on a V-shaped surface. The user independently scrolls through it in the process of work;
The book is placed on a V-shaped surface
scanner for slides. Handles slides and film;
Scanner processes slides and film
The scanner is moved by hand
Unlike other types of equipment of this type, a wide variety of originals can be processed on the tablet: single pages, books, films, slides, various objects. In addition, the size ranges from miniatures to large formats. This is because you do not need to fasten the paper to the cylinder like in a drum scanner or pass the original through the rollers. You can lift the lid to process a book or picture with a frame. A depth of field up to 30 mm allows you to scan three-dimensional objects. Films and slides are copied with additional accessories.
To choose the right model, you need to understand how they differ. Then the purchase will not turn into a mistake for you and will allow you to use the device for many years.
Once you've decided on the key specs, take a look at this: Business scanners can process up to 8,500 images per day. They have a panel with connectors for creating a multiplayer network. Can scan from both sides.
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Video (click to play). |
USB connection
The original is positioned face down
Close the lid. Press the power button. And only after that launch the program on your computer. Make the necessary settings for scanning. Click ok.
Program window for selecting settings
If there is no power button, then there are control buttons. They are located on the lid or on the body of the device.
Control buttons on the scanner lid
Select the required mode and press the button.
Selecting the Scanner Operation Mode
Scanners have various breakdowns. In some cases, you can fix them yourself, in others, you can take the device to a service center.
Increase font A A A
We will disassemble the old Epson scanner.
Its white part is removable, under it there is a transillumination device for slides.
It consists of a fluorescent lamp, its power supply unit and a light diffuser.
Share the article with your friends on social networks! I would be very grateful to you.
A lot of them are brought to us by faulty barcode scanners. Some of them are done in the presence of the owner for a maximum of 10 minutes. It is about such repairs that we want to share with you.
The main thing to remember is that not knowing the basic safety rules can lead to the impossibility of recovery. Your case may not be described here.
The most common breakdown occurs in the case or buttons. which (e) can be neatly glued with glue. De-energized - Disassembled - Glued - Allowed to dry - Collected -Connected.
Another type of malfunction is when the scanner seems to read a barcode (there is a sound), but no data is transmitted to the program. Consequently, there is a breakdown in the connection between the reading and transmitting device of the scanner - the scanner cord - the connector of the scanner and the computer.
If a break in the cord can be seen (the rodents tried, or managed to crush the wire with a chair). Found, twisted, insulated.
In laser scanners, there is a breakage or breakdown of the mirror from the beam (the scanner does not burn with a strip, but with a dot). If the mirror has fallen off the moving film, we do not recommend glueing the millimeter ourselves, it will not read there (only to the workshop for repairs). On some scanners, a mirror with a magnet is located on movable plastic - which is sometimes knocked out when the scanner falls from the grooves.
You will not see more serious damage with the eye. A case from practice.
The barcode scanner "Honeywell Eclipse 5145 Laser Scanner" was under repair, when it periodically works normally, but for no apparent reason stops working. It reads a barcode, there is a sound of reading, but there is no transfer to the program. A day, two, a week lies gathering dust, they connect, it works for an n-th time and there is a malfunction in a circle.
Our actions need to identify a hardware or software error.
Since the software error is easier to find and fix, we try. For this we need a book with barcodes from the scanner. We are trying to reset the scanner to factory settings (you can even click on all barcodes).
The main order is looking for three (two - the first and the last can be one) barcode
It should be understood that the scanner will already be at the factory settings (if the port emulation mode was on the USB scanner, then you must also configure it for this emulation).
Resetting to factory settings did not give any results.
Let's go through the hardware.
We carefully disassemble the barcode scanner (write down, take pictures of the disassembly actions), at the same time visually inspect for anomalies (dark spots, odor).
We parse to the boards with cleaning the contacts (school rubber band, alcohol, medium-hard brush). We do the assembly (you can not completely assemble the case
just carefully) scan.
Simple cleaning helps 90%.
In the photo, they circled in red the part that needs to be torn and cleaned first (you can remove and insert it several times).
If you are not sure of your actions or have never observed, then we do not recommend doing it yourself. We can repair it for a reasonable price with a guarantee.
I began the check by inspecting the motor, it was assumed that one of the plastic gears was worn out. For testing, I removed the belt from the roller on the opposite side. It was necessary to unscrew two bolts and the roller can be easily removed. Then I tried to turn the motor, everything worked fine.
Then I tried to move the carriage and realized that this requires a lot of force. It immediately became clear that the mechanism was in good order, and the scanner was not working due to the lack of lubrication on the rail. Probably the Chinese, who assembled the unit, regretted the oil or used it not for its intended purpose =). I only had graphite grease, which I used to lubricate the coolers. This is probably not the best choice for this situation, but there was no other at hand. I applied a few drops of oil to the rail next to the carriage and ran the carriage from side to side several times. Until she began to slide freely. After that, I assembled the scanner and checked the work. Everything was fine and has been working like this for several months.
The cardan shaft wrote:
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> When analyzing the apparent reasons for the head subsidence precisely in
> The center of the scanner could not be installed.
Elementary Watson! 🙂 When scanning books, thick magazines and other “oversized” waste paper with an open lid, they pressed it very strongly against the scanner glass so that the bend of the binding was unfolded as much as possible. And a simple household scanner is a delicate plastic animal. It flexes easily even under relatively light loads. Of course, it will not hurt to lubricate, and also look carefully to see if the parallelism has been violated and if the guides along which the scanning head travels have sagged just in the center.
Edited 2 times. Last time 04/23/09 08:04 AM by Boris.
Lubricate the guides on which the carriage travels. Better than something chemically neutral and non-conductive, such as silicone oil or lubricants based on it.
As a preventive measure, I smeared my scanner with grease obtained from a Soviet typewriter, which was at 580m. The grease is good, thick and evenly applied to the guides.
And another thing to note to scanners - if, when scanning, narrow, 1-2 pixels of colored (green, blue, red.) Stripes appear along the course of the lamp, do not rush to change the lamp or matrix in the service, for home scanners it will be about half the price of the new , or even more. It is enough to carefully disassemble the case, find the white strip that serves for calibration, and remove the dust that has gotten from it, and at the same time blow out the lamp itself with the matrix. Of course, this must be done carefully, who is rich in what. Ideally - with a special canister with clean air, at worst, just blow (but not spit) 😉
It helped me, out of 20-25 pages there are 3-4 left, as time will be, I will sort it out again.
DSI wrote:
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> Hello.
> I need an external power supply circuit for the Epson Perfection scanner
> V100 Photo, or what can replace this PSU.
In Moscow there is a wonderful store "Chip and Deep", located near the metro station Prospekt Mira (go to the right along the former tramway towards the Rizhsky railway station). I myself once bought a power supply there, and it was for the scanner. What else is curious about the store is the ability to order almost any radio component, microcircuit, etc., even if they are not in stock at the moment.
Unfortunately, for nonresidents, the power supply unit can turn out to be expensive, taking into account the cost of travel to / from Moscow.
DSI:
And in Ukraine there are enough of their own similar companies, look for example (do not count it for advertising, I do not work there and have nothing to do with this company, except as a buyer).
Power supply circuits, as well as circuits of most modern technology, as a rule, do not exist in the public domain. Lucky only in cases when there is a drain from service centers. But why do you need a circuit - if you are not an experienced radio amateur, then it will not help, and if an experienced one, then typical malfunctions can be found without it (visual inspection, checking the diode bridge, power transistor and its circuits, the integrity of the capacitors).
Instead of the existing power supply, you can use similar ones for the same voltage and with a current not less than that indicated on the native power supply. You may have to re-solder the connector, besides, do not forget about the polarity.
mkv wrote:
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> Power supply circuits as well as circuits of most modern technology
> as a rule, it does not exist in the public domain.
But something like that can be found in the old filing of the magazine "Radio Amateur". There were many published schemes on the topic "universal power supply". In addition, these schemes were quite primitive today, not requiring any scarce and expensive components. In the USSR, this (which is quite obvious) was more problematic than it is now. The binders, I hope, have remained in Ukrainian libraries, and you can find it on the Internet, if you are not too lazy to torture Yandekh.ru, or maybe Wikipedia will do.
Recently, more and more drawn-out Canon scanners from one of the enterprises. These scanners work thanks to a fixed optics unit under which a sheet of paper is pulled. Therefore, in such scanners, as in printers, it is necessary change the paper feed rollers frequently, but the speed and dimensions of such a scanner, I must say, I liked it... Moreover, you can immediately feed a bundle of sheets into such a scanner and go to put the kettle on. So closer to the body - what to do if Is the Canon DR-2580C color scanner streaking or faded?
Here immediately need to clean optics... Moreover, examination of optics with the naked eye gives little - dust particles are visible only sometimes in reflected bright light. And the image received from the scanner may look like below.
This is a duplex scan - the sheet is scanned from both sides at once - yes, in this scanner two optics units and, apparently, both are contaminated from the same side. That is, the dust flew into the apparatus from one side and penetrated into the optics. This can be due to a draft, for example. The scanner, by the way, is Japanese - it's nice to look at this inscription nowadays.
Sticker EnergyStar talks about the moderate certified power consumption of this scanner.
We open the device and see the paper pick rollers, as well as upper and lower scan units.
Before disassembling the main part, remove the back cover of the scanner, bending back the stops.
Further, on the right side of the device (if you look at it with clear eyes) there is a lid with latches. These the latches need to be bent.
Another latch is shown with an arrow.
Remove the side cover.
Open the scanner and release top cover latches... It can be removed easily.
Disconnect loop of the upper scanning unit.
The upper optical block holds the axis of the paper feed rollers. We turn this axis with narrow-nose pliers to see the slot.
Press on the right or left on the axis of the rollers and move it to the right.
We take out this axis with rollers. We hold the spring so that it does not fly into the window.
To the left and right of the scanning unit there is tricky fasteners... It can be easily removed.
pay attention to curly cutouts in these mounts.
We take out the optical unit and place it on a flat surface.
Now turn on the discreet hand mode and release latches around the perimeter of the optics unit.
Under the cover there is a scanning ruler with light guides and diffusers.
On the sides in a compact body are installed multi-colored LEDs for illumination.
As practice has shown it is the light diffusers that get dirtywhich are not easy to remove. You must first carefully bend the plastic hooks that hold the PCB in place.
Disassembled unit of optics of the Canon DR-2580C scanner looks like the photo.
Scanning ruler protected by a layer of transparent epoxy resin.
It is very reliable solution, although the color rendition probably suffers because of this.
Please note that there is a special stuck on the body of the scanning unit. calibration ruler... It is needed so that the scanner understands the black level and white level. A kind of reference brightness levels. So if it gets dirty or scratched, it will immediately affect the image quality.
My clients often like to scan documents fromabout staple clips, which scratch that gauge strip decently. No matter how I tried to restore it, I could not achieve the desired reflection coefficient. So I had to order a new scan unit entirely due to a couple of scratches on the strip.
Cleaning the Scanner Optics
Cleaning the Scanner OpticsWe came to the most interesting. We remove the diffusers, sliding them to the side, freeing them from the hooks. At the same time, it is better not to contaminate them with your hands.
The trickiest trick here is to clean out dust and dirt from the narrow cutoutcircled in the photo. This cut is made to create areflecting surface inside the diffuser. Accordingly, if a speck of dust gets there, the light from it is reflected differently - an illumination is obtained in this area, which looks like white stripes in the image.
I clean like this - first I wash the scanner lens in alcohol or glass cleaner - also contains isopropyl alcohol and surfactants. That's not all - then I take a piece of thick paper, moisten it in alcohol and stick it into this cutout, cleaning it along the entire length. Sometimes it doesn't work the first time. We have to assemble the optics - check the scan, disassemble and clean again.
As a result, labors are rewarded and we can contemplate clean scan.
On this Canon DR-2580C scanner optics cleaning completed... The lower part of the optics is cleaned in the same way. And you can pull it out, by releasing the two latches on the sides.
Good luck in the repair and in all your endeavors!
Soldering Master.
(18+) Dedicated to everyone who appreciates freedom of thought.
For a long time I was going to post, but my hands did not reach.
I hope my writing will be useful to someone.
2 maxim: I also have to change the broken glass in the HP A4 flatbed scanner. On the site Dmitrov.su ftopic1355.html you reported that you replaced it with ordinary glass (window glass?) And have been using the scanner for more than a year? What are the results? Shouldn't there be high thermal resistance quartz glass? Photos do not deteriorate? Do not overheat?
How accurately was the glass thickness maintained? I have my own broken glass 2.94 mm thick. What is the acceptable gap between the glass and the scanning head. Did you have to correct the color rendering due to a different light-color transmission of the substitute glass? Thanks in advance for your reply.
2 all: who else will add?
Replacing Burnt Motor Driver with HP 1100 or Canon LBP-810
HP1100_ (LBP-810) .pdf 405.13 KB Downloaded: 11217 times
Extremely unqualified specialist
Posts: 548
Extremely unqualified specialist
Posts: 548
Service manual HP LaserJet 1000 series printer.
Service. (Eng) .PDF
HP 1160/1320 / P2015 Technical Instructions
cartridge disassembly with photo). (eng) .PDF
It turns out that there are inkjet printers so old, with so dry heads that it is impossible to soak and rinse them. As an example, there are two epsons - TX200 and CX7300. According to the owners, “they lay there, then dried up and did not print any more”.
Indeed, everything that is possible has dried up in them - both the head and the mouthpiece. And if it was possible to soak and rinse the latter, then everything is much worse with the heads. A special flushing liquid for inkjet printers, smelling of ammonia, had no effect: neither soaking in it, nor an attempt to pour through a syringe led to nothing. Since there is nothing to lose, then you can connect heavy artillery in the form of alcohol and acetone. The use of these substances is not recommended if everything is not so started, but in this case there was not much choice. Successive soaking and rinsing with these substances yielded a result, albeit disappointing: about half of the nozzles were rinsed out.But the rest - not in any. It is not known what kind of ink these printers were filled with, but what they used is beyond doubt. This can be easily identified by the multicolored ink stains almost everywhere. Since it is useless to tinker with such semi-washable heads, it was decided to disassemble the printers.
You can take a little in them: two good electric motors with shafts 3.17mm for drills and saws, a board, a scanner backlight lamp, a ccfl inverter. There remains a pile of mechanical parts that are not applicable anywhere in our business.
There is a good scanner, but I would not want to store a bulky device for the sake of a compact and flat part. Separate the scanner from the printer.
But it’s not that simple. The scanning module here is connected to the main board of the printer, it controls everything - both scanning and printing. The board itself is quite compact, and the power supply is generally in a neat plastic case.
To check, we disconnect from the board all the "printing" wires and loops - motors, head, sensors. We connect the whole thing to the computer, install the scanner driver - and it works! There was a fear that, not finding the signals from the sensor heads, the main board would fall out tightly into an error. But no, apparently, MFPs are arranged more thoughtfully.
As a result, the idea turned out to be quite working! In an MFP, you can separate the scanner from the printer and it will work. The photo shows what needs to be taken and what needs to be thrown away. Of course, here you need to think about the design, attach the button block, the board itself and the power supply, but all these are trifles for a real radio amateur.
