Scanner is a widely used computer input devices. As an optoelectronic, mechanical integration of high-tech products, it is our commonly used office equipment, but once it fails to make us at our wits' end, some of the faults need to be repaired by professionals, there are many faults can be ruled out on their own. The following to introduce some common troubleshooting methods:
A scanner disassembly
In the maintenance and overhaul often need to dismantle the scanner, so the first for you to introduce the scanner disassembly of the basic methods:
1. First remove the glass platform, with the cross screw into the round hole unscrewed screw, you can up to take down the top cover and the glass platform. After opening the scanner, you can see the stepper motor, drive belt, scanning head and circuit board and other parts. Some of the scanner's upper and lower parts are not screws but with a plastic buckle articulation, disassembly with a small flat screw into the gap to pry open the plastic buckle, can be separated from the upper and lower parts, pry the plastic buckle action should be light, do not damage the plastic parts.
2. Unplug the data cable. Scanners generally have two internal circuit boards, one fixed in the scanner head on the back side, the other - installed in the rear side of the scanner, the two circuit boards are connected through the data soft line. The two boards are connected by a data cable. The data cable needs to be removed before removing the scanning head. The data cable is stuck in the slot on the circuit board, and when removing the cable, the pins on both sides of the slot should be pivoted outward, and then the cable can be easily withdrawn.
3. Remove the scanning head. Most of the scanning head worn in the round metal rod (rail), driven by the drive belt along the scanner longitudinal movement, just remove the round metal rod from the base of the plastic card base, so that the scanning head from the drive belt, you can remove the scanning head and round metal rod upward, and then the round metal rod from the scanning head out of the draw.
4. Remove the lamp. The lamp is located on the top of the scanning head, placed horizontally along the scanning head, stuck in the scanning head on both sides of the plastic card holder, and its power supply plug in the back of the scanning head on the circuit board. The lamp can be removed from the scanning head by simply removing the power supply plug for the lamp on the circuit board. The thinnest lamps are only about the thickness of a matchstick and require special care when removing and placing them.
5. Remove the circuit board. Unscrew the two screws can be removed from the scanning head of the circuit board, in the circuit board on the front of the double in-line package can be seen CCD device. As the CCD device needs to scan the optical lens in the optical path, the installation of improper restoration will affect the quality of scanning, it is recommended that you do not just remove the scanning head of the circuit board.
Second, common causes of failure and troubleshooting
1. The whole image is only a small part of the acquisition
Causes of failure and troubleshooting: focusing rectangular box is still stuck in the preview image; only the area within the rectangular box is acquired. After focusing, click to remove the focus rectangle and repeat the test to acquire the image.
2. Excessive Patterns in the Image (Noise Interference)
Cause and Troubleshooting: The scanner is operating in an environment where the humidity is outside of its allowable range (perhaps the scanner has been stored or transported outside of the allowable range). Let the scanner work within the allowable range. Turn off the computer, then turn off the scanner, then turn on the scanner first, then turn on the computer to recalibrate the scanner.
3. The difference between the color of the original and the screen color is too large
Causes and troubleshooting: (1) Check that the screen's settings for chroma, brightness, and contrast are in accordance with normal requirements.
(2) Check whether the screen setting options of ColorLinks are correct.
(3)If FotoLook is executed under Photoshop, please check whether File-PreferencesMonitorSetup, PrintinglnksSetup and SeperationSetup are correct.
(4) Assuming that all of the above settings are correct, you can do the color correction between the scanner and the display.
4. Scanning the entire image distortion or blurred
Reasons and troubleshooting: (1) Scanner glass plate is dirty or reflective mirror strip is dirty; use a soft cloth to wipe the glass plate and clean the reflective mirror strip.
(2) Scanning originals documents are not always flat on the document table; make sure the scanning originals are always flat on the platform.
(3) Ensure that documents are not moved during scanning.
(4) Scanner vibrates during scanning due to uneven placement; take care to place the scanner on a smooth surface.
(5) Adjust the software's `exposure setting or `gamma' setting.
(6)If the above situation occurs with a parallel port scanner, there may be a problem with the transmission cable, and it is recommended to use a high performance cable of IEEE-1284 or higher.
5. The scanned image always appears to be missing dotted lines when displayed on the screen or printed out
Reasons for the failure and troubleshooting: (1) Check whether the scanner's sensor is malfunctioning or the paper guiding mechanism of the automatic document feeder is malfunctioning, and look for a professional to carry out inspection and maintenance.
(3) the optical lens of the scanner to do dust treatment, with a special small vacuum cleaner works best.
(4) Check whether the white correction strip on the outer cover of the scanner is dirty and needs to be cleaned in time.
(5) Check to see if the table glass is dirty or scratched, which can be avoided by thoroughly cleaning the scanner or replacing the table glass on a regular basis. The latter should be done by contacting your local Authorized Technical Service Center.
6. Scanning prints, tortoise (cross-image) appears in a specific area of the image
Reasons for failure and troubleshooting: First, let's understand the simple principle of color print imaging. Try to take a magnifying glass to observe the general color prints, in fact, any graphic is composed of four colors, is often referred to as cyan, magenta, yellow and black. These colors are very small ink dots (good color printing should have a resolution of 1200 dpi), the use of ink dots arranged in such a way as to give the eye an illusion, such as a certain area of red ink dots are more, the human brain's visual system will think that this area is red. Such small dots, in the scanning time will be sensitive photographic components detected, so the scanning results will make the whole picture has a variety of lines appear, seriously affecting the quality of the scanned image. The following programs can be used to avoid the generation of tortoise lines.
(1) Select the Color Photo (De-Retina) setting in the Image Type or the De-Retina setting in the Image Type dialog box.
(2) Place a transparency sheet between the document and the drafting table to defocus the image.
(3) Position the image correctly.
(4) You can slightly reduce the image size.
(5) Check the Clear Edge Sharpening check box in the scanner's TWAIN.
Scanner maintenance tips
Scanner as an image input device, has been popularized to thousands of households, then in the use of how to correctly go to the maintenance of the problem is also worth noting. Today, I would like to introduce you to the daily maintenance of the scanner to pay attention to the place.
1, do not arbitrarily hot swap data transmission line. General home scanners are EPP interface, in the scanner after power, if you feel free to hot-plug interface data transmission line, will damage the scanner or computer interface, replacement is more trouble, although you try not to have a problem, please do not do so.
2. Don't plug and unplug the power cord from the scanner's connector too often. This often plug and unplug the power cord and the scanner's connector, will cause poor contact at the connection, resulting in circuit failure, maintenance is also very troublesome. The correct power cut-off should be to unplug the inline power converter from the power outlet.
3, do not cut off the power in the middle. As the mirror group in the work of slower movement, when scanning an image, it takes part of the time from the bottom of the return, so we do not cut off the power supply in the case of normal power supply, wait until the scanner's mirror group is completely back in place, and then cut off the power supply. Now there are some scanners in order to prevent vibration during transportation, but also to the mirror group part of the added lock, visible mirror group return to the mirror group of how important the protection.
4, place the items to be positioned accurately at a time. Some models of scanners can scan small three-dimensional items, in the use of such scanners should pay attention to: placing the items to be positioned accurately at a time, do not casually move to avoid scratching the glass, and do not move the items in the scanning process.
5, do not place items on top of the scanner. Because of office or home space constraints, and the scanner is more space, so some users often put some items on top of the scanner, over time, the scanner's plastic cover because of the hollow pressure will lead to deformation, affecting the use.
6. Cut the power when not in use for a long time. Some scanners are not designed to cut off the power switch completely when not in use, when not in use for a long time, the scanner lamp is still on, because the scanner lamp is also a consumable, so we recommend that users cut off the power supply when not in use for a long time.
7. It is recommended that you do not use the scanner in a window location. As the scanner will produce static electricity in the work, over time will be adsorbed dust into the body of the internal impact of the work of the mirror group, so try not to lean against the window or easy to adsorption of dust position to use the scanner, in addition to keep the scanner to use the environment of the humidity, to reduce the impact of floating dust on the scanner.
8, the mechanical part of the maintenance. Scanner after a long time, to remove the cover, with a cotton cloth soaked in sewing machine oil to wipe the mirror group of two tracks on the grease, wipe clean, and then the appropriate amount of sewing machine oil drops in the transmission gear set and the belt at both ends of the bearings on top, and then finally loaded to test, you'll find that the noise is a lot smaller.
Now the scanner has entered more and more families, as a new generation of input devices, it has a lot of unique advantages, can let you really do what you see is what you get. As a good partner in our daily life, we usually pay more attention to its maintenance. As we all know, scanner is a very delicate equipment, there are a lot of optical devices, if dirty will certainly affect the scanning effect. But we can not only use in a dust-free environment, which is too impractical. Since we can't prevent problems before they happen, we can only put in more effort after the fact, so regular cleaning is definitely indispensable.
Well, the cleaning begins. First of all, we have to take a soft cloth to the scanner shell (excluding the glass flatbed) wipe again, its purpose is to sweep away the surface of the floating dust, to prevent water wipe the shell to get more flowers. Then use a damp cloth to wipe the shell carefully, pay attention to the cloth is not too wet, in the process of wiping the best not to have water out. In some places where the dirt is very thick, you can dip some washing powder on the wet cloth, and then rub it hard a few times, and then don't forget to use a clean wet cloth to wipe the place with washing powder again.
Next, turn on the scanner, and before you do that, it's a good idea to lock the security lock on the back of it. If you find that the dust is thick inside, you can blow it up with a balloon, and then you can wait for the dust to fall off, but don't forget to cover the scanner in the meantime, or else what you've just done will be a waste of time. While you're at it, buy a bottle of distilled water from the supermarket, and get a small ball of cotton wool.
In the scanner's optical components to find its tube, reflector, the cotton wool with distilled water to wet, wet and dry to the extent that after a strong squeeze does not come out of the water as good. Then carefully wipe on the light-emitting tube and reflector, pay attention, must be light, do not change the position of the optical accessories.
If you find that the scanner moves some noise in the process of use, it may be the sliding rod lack of oil or dirt on it, you can find some lubricant in the sliding rod to rub some, increase its lubrication degree, the noise problem can be basically solved.
After all the cleaning inside the machine is installed, and finally a clean wet cloth to wipe the scanner's flat glass clean, you will see a brand new scanner in front of you.
How to clean up the dust on your scanner.
First of all, we need to take a piece of soft (cotton) cloth to wipe the scanner's shell (excluding the glass flatbed) once, the purpose is to sweep away the surface of the floating dust, to prevent the shell when wiping with water to make more flowers. Next, use a damp cloth to wipe the case carefully, taking care that the cloth is not too wet and can wipe away the dirt.
Next, turn on the scanner, and before you do, it's a good idea to lock the security lock on the back of it. If you find that the dust inside is thicker, you can use a blow-up balloon to blow it out, and then you can wait for the dust to fall off, and don't forget to cover the scanner in the meantime, or else what you've just done will be useless. While you're at it, buy a bottle of distilled water from the supermarket, and finally find a small ball of cotton wool.
In the optical components of the scanner to find its light tube, reflector, the cotton wool (preferably lens paper, photo studio have sold) with distilled water to get wet, wet and dry to the extent of the strong squeeze does not come out of the water as good. Then carefully wipe on the light tube and reflector, pay attention, must be light, do not change the position of the optical accessories.
If you find that the scanner in the use of the process of sliding bar moving some noise, it may be the sliding bar lack of oil or the top of the accumulation of dirt, you can find some lubricating oil in the sliding bar on the rub some; to increase its degree of lubrication, the noise problem can be basically solved.
After all the cleaning inside is completed, the scanner is installed, and finally a clean wet cloth to wipe the scanner's flat glass clean, then you will see a brand new scanner displayed in front of you.
Lastly, I would like to remind you that the soft (cotton) cloth used to wipe the optical glass must be soft and clean, otherwise it will be too late to scratch the optical glass.
Scanner cleaning methods and precautions
I believe that everyone's life in contact with the scanner it, then you know the scanner cleaning methods and precautions? Here is my carefully organized scanner cleaning scanner cleaning methods and precautions, for your reference, I hope to help the need of friends.
Scanner is the use of optoelectronic technology and digital processing technology, scanning mode will be converted into a digital signal graphics or image information device. Here I come to give you an introduction to scanner cleaning methods and precautions, I hope to help you!
Cleaning method:
1. Scanner shell with a dry a little soft cloth to wipe once, followed by a wet cloth to the shell carefully wiped again, pay attention to the cloth is not too wet. In some of the accumulation of dirt is very thick place, you can dip some cleaner in the wet cloth, wipe a few times, and finally do not forget to use a clean wet cloth with cleaner place to wipe a few times.
2. There are a lot of optical devices inside the scanner, which is a very delicate device, so be careful not to use a wet cloth when cleaning the interior, use a soft brush to gently sweep the line, the corner of the tiny place with a blowing balloon to blow again. Be sure to cut off the power supply when cleaning the interior.
3. In the scanner's optical components to find its light tube, the reflector, the cotton wool with distilled water wet, wet and dry to the extent of the strong squeeze after the water as good. Then carefully wipe on the light-emitting tube and reflector, pay attention, must be light, do not change the position of the optical accessories.
4. If you find that the scanner in the process of moving some noise, it may be the sliding bar lack of oil or dirt on it, you can find some lubricant in the sliding bar on the rub some, to increase its lubrication, the noise problem can be basically solved.
5. Inside all cleaned up after the machine installed, and then finally a clean damp cloth to wipe the scanner's flat glass clean, then you will see a brand new ` scanner in front of you.
Note:
1. Do not press the glass surface inside the scanner.
2. Be careful not to scratch or damage the glass surface inside the scanner, and do not use hard or abrasive brushes for cleaning. Damage to the glass surface can reduce scanning quality.
3. Do not clean the scanner with alcohol, thinner, or caustic solvents. These chemicals can damage scanner components and housing.
4. Be careful not to spill liquids on the scanner's mechanical parts or electronics. Doing so will permanently damage mechanical parts and circuitry.
5. Do not spray lubricants into the scanner.
6. Make sure the paper feed rollers are completely dry before using the scanner.
Expand Scanner Common
Increased Scanner Noise
Fault phenomenon: A lot of noise is emitted when scanning.
This is generated by the movement of mechanical parts of the scanner work, there are two reasons, one of which is closely related to the scanning speed. According to the specific software of each brand machine, the scanning speed set to medium or low speed can solve the problem. Second, related to the working environment, especially in winter, the scanner internal slide bar will become dry, then the work noise will increase. The way to deal with it is very simple, one is to improve the room temperature, the second is to open the scanner, to the slide bar on a few drops of lubricant can be.
Can't find the scanner
Failure phenomenon: the system prompts can't find the scanner after powering on the machine
This situation occurs, a lot of OLs or novices will think that the scanner has a serious failure, and will call the dealer. And JS will take the opportunity to knock us off or even make us buy a new scanner.
In fact, this is one of the most common failures. There are only two reasons for it. The first is very simple, look at the scanner's power light is on. The power light is always on, which means it is energized. In my daily office equipment maintenance process, many machines will appear this problem. At first glance, it turns out that the power supply is not plugged in, or the power supply is not plugged in properly. At this point, as long as the power supply is plugged in, the problem is solved.
If you can not troubleshoot. Or the power supply is not a problem, it will be the software settings of the problem. After powering on the computer, click the "Refresh" button in the Windows "Device Manager" to see if the scanner is found, and to see if the appropriate driver is correctly installed. At the same time, check the "Device Manager" in the scanner with other devices whether the conflict (IRQ or I / O address), if there is a conflict to be changed. In short, this kind of failure is just a line problem, driver problems and port conflict problems.
Scanner is not ready
Failure phenomenon: the scanner does not work after the power on, Ready (Ready) light does not light
Open the scanner after the power supply, if you find that the Ready (Ready) light does not light, and the power supply, driver, the port by checking that there is no problem. At this point, some people will feel at a loss. In fact, troubleshooting this kind of failure is very simple. To the winter, the temperature is low, after turning on the scanner, do not rush to use, to first pass a moment of electricity, that is, warm up for a period of time, and then use. At this point, the problem is solved.
Only a small part of the whole image is acquired
Fault phenomenon: The scanning result is only a small part of the original
This situation occurs mainly because of our operation. When scanning, the focus rectangle box still stays on the preview image without zoom selection, so that only the area inside the rectangle box is acquired. Therefore, after doing a preview scan, be sure to correctly select the part to be formally scanned.
Scanning out of the screen color blurred
Trouble phenomenon: the scanner can be used, but the scanned image is fuzzy
This phenomenon is usually found in the office environment is poor. We use the scanner process, there will inevitably be some dust, if you do not pay attention to cleaning, dust attached to the glass plate, this problem will occur. At this time, we have to use a clean cloth or paper to wipe the glass plate clean first. Be careful not to use water and other liquids to wipe, that will make the scanned image show rainbow colors. And don't use alcohol to wipe, because alcohol generally has a corrosive effect on the life of the scanner will have a certain impact.
If the problem persists after wiping the glass, it's a matter of setting up our use. For example, we will scanning resolution 300dpi scanner set to resolution 1200dpi or more to scan, the results will be more blurred. Because 300dpi scanner scanning 1200dpi is equivalent to put a point to four times larger. At this point, it is sufficient to set the scanning resolution to the correct value.
Scanning the entire image deformation or blurred
Fault phenomenon: scanning results of the overall deformation
The emergence of such a failure, in general, is the scanner work process, the scanner or the original appeared to move. Therefore, we have to provide a smooth working platform for the scanner. And do not move the original documents during the scanning process.
Output image color is not bright enough
Failure phenomenon: look at the scanning results feel that the color is not as bright as the original work
This kind of failure, in general, the scanner itself does not have a problem. Mainly our use and setup problems. For example, we can adjust the monitor brightness, contrast and Gamma value. Or simply change a better monitor. (At this point, you will understand why monitors for fine artists are expensive). Similarly, if the conditions are limited, we may set the Gamma value through PS or other image editing software. Generally speaking, the higher the Gamma value, the prettier the colors and the more layers in the image.
Here, some relevant Gamma values are recommended for you. For general use, the Gamma value is usually set to 1.4; for printing, 1.8; and for photos on the Web, 2.2. There is also the possibility that the scanner should be color-corrected before it is used, as this will most likely distort the scanned image, and that you can make specific adjustments to the brightness/contrast options in the scanner's driver dialog box.
So far, the common failure to analyze and deal with the end, as long as we pay attention to these issues in the use of the scanner will give us a lot of office and life convenience and fun.