1, check the coordination of the scanner to check the overall coordination of the scanner is to check the scanner in the normal operation of the sound is rhythmic, the scanner's transmission speed is very fast. In the test, we can first use the surface white and flat paper into the scanner plane glass to scan, the image will be scanned with a special image browsing tool to open the test, if you find that there are cracks in the image phenomenon or can see the image of horizontal horizontal lines, it proves that the scanner's overall performance of the transmission is not good, the time running long, then, the scanner may be faulty. 2, test the black-and-white Scanning effect to find a clear black handwriting above the white paper as a scanning sample, put the scanner plane glass to scan, the scanner will be set to scanning resolution of 300dpi, while the choice of black-and-white scanning to complete the scanning of the paper; and then browse the image tools to get the image, if the scanned image found that there are no other traces of the word in addition to the scanning image, it is clear that the scanner is in the black-and-white scanning effect in a good state. 3, test the color scanning effect to find a very colorful photo into the scanner as a sample to test, and then set the resolution of the scanner to 600dpi, while the scanning method is set to photo scanning, in the image of the document before the official final draft, we also have to more than a few times to pre-scan. Finally, with a special image browsing tool to observe the scanned image, through the comparison with the original photo, we can feel whether the scanner has a bias fault, as well as scanning the image details are full and so on. 4, test the authenticity of 36bit scanner are now 36bit color depth, we do not have a professional scanning sample paper for testing, so you can choose a Ordinary printing photos of the back of the sample, and then the scanner's various scanning parameters are set to the default value, the final scanned image obtained with the image browsing tools to zoom in and observe, if the scanned image can be a photo of the watermark clearly show up, it shows that the current scanner does have a 36bit color. 5, check the effect of OCR recognition in the inspection of the effect of OCR recognition, you can use the A very good quality print to test the sample, in the scanning of this sample we also want to make sure that the scanner scanning method for black and white scanning, while the scanner's resolution is set to the default scanning; if the OCR program can accurately identify all the original sample of text on the words successfully, it is clear that the scanner's OCR recognition system has a very high recognition capabilities, otherwise the scanner in the 6, test the ability to go to the network for those who boasted of the function of the scanner to go to the network, we can follow the following method to test: first of all, find a copper color printing of the publicity page as a test of the ability to go to the network of scanning samples, and then in the scanning application will be scanned with a resolution of 300dpi size, and then choose to go to the network mode and the ordinary mode of scanning in these two ways; the image obtained by scanning, we also have the ability to scan, the scanner will be used to scan, and then scanning, and then scanning, and then scanning. Scanning images obtained, you can also use ACDSEE and other special tools to zoom in to display, pay attention to the two images to zoom in to display the multiplier is set to the same, in order to accurately compare and contrast, to see the implementation of the function of de-networked images have a rounded color and smooth image; if not or the image is not clear, then, it is clear that the scanner de-networked ability is limited or even very low. 7, test the ability to identify the details of the scanner to identify the details of the scanner. Details of the ability of the scanner to identify the details of the scanner will directly determine the final output quality of the scanner, so the ability to identify the details of the test has become an important part of the test scanner. In the test, you can choose a thin wire or hair as a scanning sample, and use the default parameters of the scanner to perform the scanning operation; will be obtained with a special tool to zoom in to show the image, if you find that the metal wire or hair line breaks, it shows that the scanner to capture the details of the ability to not be strong. 8, the test of the manuscript adjustment ability to be placed on the scanner with a black handwritten on the white paper on the plane of the glass and select the scanner to be used for the scanner to identify the details of the scanner's final output quality. Black and white scanning method, the resolution of 300 size to check the scanning, if the scanned image looks very similar to the original, then, it shows that the scanner manuscript adjustment ability is very strong, if the image suddenly increased a lot of pockmarked background, then, it shows that the scanner manuscript adjustment ability is general.
1. Open the "Settings", you can see the "Device" icon
2. Enter the device, click on the "Printers and Scanners" you can see the following figure screen, if there is no image processing equipment, there is no scanner, then there is no scanner driver
3. You can also directly connect the computer and the scanner, if the computer does not respond to that is not installed scanner driver. If you do not have a scanner driver installed, you need to download a commonly used regular driver to install. Connect the power supply, connect the scanner and the computer, download the driver of the connected scanner model on the Internet, install the driver, you can use it.
Some common problems with scanners and how to fix them
Hardware problems and software setup problems. Hardware problems are mainly power supply, wiring and so on. Software setup problems are mainly drivers, ports, scanning settings and so on. At the same time, a suitable working environment is also a guarantee that the scanner works properly. The following is my collection of some common problems of the scanner as well as solutions, welcome to share.
Scanner common failures and their solutions
1, open the scanner appears "SCSIcardnotfound prompt
SCSI card is set on the fuse, when encountered in bad circuit conditions (voltage instability or short-circuit, etc.) will be automatically disconnected, to be a good line or measured temperature will be reduced automatically after the connection. Connecting. This prevents damage to the scanner from being caused by improper circuitry.
2. Can't find the scanner
Check to make sure the scanner is powered on before you start the computer. If not, you can press the "Device Manager" refresh button to see if the scanner has a self-test, and if the green light is on steadily. If the answer is yes, you can rule out the possibility that the scanner itself is malfunctioning. If the scanner's indicator light keeps flashing, it indicates that the scanner's status is not normal. First check if there is any problem with the interface cable between the scanner and the computer, and if the scanner driver is installed. In addition, you should also check whether the scanner and other devices in the Device Manager conflict (IRQ or I/O address), if there is a conflict you can change the jumper on the SCSI card.
3, the scanner Ready lamp does not light
Open the scanner power supply, if you find that the Ready lamp does not light, first check the scanner internal lamp. If the internal lamp is found to be on, it may be related to room temperature. The solution is to let the scanner power on for half an hour and then turn it off. Turn it back on after one minute and the problem will be solved. If the scanner still does not work at this time, turn off the scanner, disconnect the scanner from the computer, set the value of SCSIID to 7, and then turn the scanner back on after about a minute. In winter when the temperature is low, it is best to warm up the scanner for a few minutes before using it, so that you can avoid the phenomenon of the Ready light not coming on after you turn on the scanner.
4, the output image color is not bright enough
If the scanned image color is not bright enough, you can first adjust the monitor's brightness, contrast and Gamma value. Gamma value is the human eye from the dark tone to the bright tone of a feeling curve.
The higher the Gamma value, the richer the level of color. In the scanner's own scanning application software, we can adjust the gamma value. Of course, for better results, you can also adjust the Gamma value in Photoshop and other software, but this is an "after-the-fact" adjustment. In the software that comes with the scanner, the Gamma value is usually set to 1.4 for general use, 1.8 for printing, and 2.2 for photos on the Web. There is also the scanner should be color-corrected prior to use, or else the scanned image is likely to be distorted, and the Brightness/Contrast option in the Scanner Driver Dialog Box can also be adjusted specifically.
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 is also worth noting the problem. 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 for testing, you'll find that the noise is a lot smaller.
Scanner Troubleshooting
The scanner is a widely used computer input device. 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 eliminated on their own. Here are some common troubleshooting methods introduced to you:
One, the disassembly of the scanner
In the maintenance and overhaul often need to dismantle the scanner, so first of all, the basic method of disassembly of the scanner introduced to you:
1, first of all, the removal of the glass platform, the use of 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 need to be pushed outward, and then the cable can be easily withdrawn.
3, disassemble the scanning head. Most of the scanning head worn on 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 upwards, 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, only a small part of the entire image is acquired
Cause and troubleshooting: focus 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 get the image.
2. Excessive patterns in the image (noise interference)
Causes and remedies: The humidity in the scanner's operating environment 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 original color and the screen color difference is too large
Troubleshooting causes and elimination:
(1) Check the screen's chroma, brightness, contrast settings are in line with normal requirements.
(2)Check whether the screen setting options of ColorLinks are correct.
(3)If the FotoLook is external to Photoshop, check the File-PreferencesMonitorSetup, PrintinglnksSetup, and SeperationSetup to make sure they are correct.
(4) Assuming that the above settings are correct, you can do the color correction between the scanner and the display.
4, the entire image scanned out of the distortion or blurred
Reasons and troubleshooting:
(1) Scanner glass plate dirty or reflective mirror strip dirty; with a soft cloth to wipe the glass plate and clean the reflective mirror strip.
(2) Scanned original documents are not always flat on the document table; make sure scanned 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 in the screen display or printout always appear to lose the phenomenon of dotted lines
Reasons for failure and troubleshooting:
(1) Check whether the scanner's sensor is faulty or the paper guide mechanism of the document automatic document feeder malfunctioning, looking for a professional to check and repair.
(3) Dust the scanner's optical lens, using 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) appeared in a specific area of the image
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 graphics are 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 select 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.
Router failures one by one (on)
Hubs, switches and routers, routers are relatively rusty, but with the popularity of large-scale LANs and broadband, routers are more widely used, and the related failures are also gradually increasing. Let's take a look at what are the common router failures.
Failure phenomenon: can not login to the broadband router settings page.
Cause and solution:
First, make sure that the router and computer have been properly connected. Check whether the indicator lights corresponding to the NIC port and the router LAN port are normal.
If the indicator light is not normal, re-plug the network cable or replace the twisted-pair cable, and then check the network connection in the computer: first, set the IP address of the computer to obtain an IP address automatically. Then check the connection of the network card to see if the IP address and gateway information is correctly obtained, if not, please set up manually, if this information has been correctly obtained, please pay attention to whether the firewall service is enabled, if so, please disable it.
Newer routers (especially those for home use) often use IE to log into the router for maintenance, so we can select "Never dial-up" in IE's Connection Settings, and then click "LAN Settings" to clear all options. Then enter the IP address of the broadband router in the address bar of the browser and press Enter to enter the setup page. If you still can't log in, please try to set the gateway to the router's IP address and the local IP address to the same network segment as the router before connecting.
If you can't solve the problem by using the above method, please check whether the NIC has conflict with other hardware of the system.
The problem? Often you can't connect to the router or the connection speed is very slow.
Cause and solution?
This situation is more related to the network cable.
If there are frequent connection problems, there may be crystal head quality problems or contact problems, focus on the various interfaces plug tight. And replace the good quality crystal head. At the same time, check whether the wire sequence of the network cable is correct.
Failure phenomenon? After using ADSL to access the Internet and setting up the router, you can't use the dial-up software to dial up.
Cause and solution?
Set up the router's PPPoE connection to dial from the router, no need to use the computer's dialing software, as long as the computer's IP address is set to "automatically obtain or set up with the router does not conflict with the IP address can be.
Failure: The router can't get a WAN address.
Reasons and solutions:
First of all, please check whether the router's WAN port indicator light is on, if not, then the cable or crystal head has problems. Then check if the router has been configured correctly and save the reboot, otherwise the settings can not take effect! Sometimes you may also need to clone the MAC address of the NIC to the WAN interface of the router, refer to the router manual for the specific settings (you can refer to the article "Solving *** Enjoy Network Connections with MAC Address Cloning").
WindowsXP System DHCP Failure:Getting Unused IP Addresses;When we are solving DHCP failures for Windows operating systems, sometimes we have to find out what addresses in a certain address range are not being used. Simply create a batch file, ask it to return only those unused IP addresses, and then enter the results of the command into a text file.
As network administrators, when we troubleshoot DHCP on Windows operating systems, we sometimes have to find out which addresses in a certain address range are not being used. I've described one way to do this before: open a command prompt window and call the ping command in a ForinDo loop. For example, to find out which addresses in the address range 192.168.1.1 to 192.168.1.100 are not being used, you can use this command: For/L%fin(1,1,100)DoPing.exe-n2192.168.1.%f
This command reports on all the IP addresses in the specified range, whether they are in used or unused, and the user is forced to rummage through a large number of them in the command line window. In fact, we can avoid all this hassle altogether by simply creating a batch file, asking it to return only those IP addresses that are not in use, and then entering the results of the command into a text file. Here's how:
Open Notepad and enter the following command in the window:
@Echooff
date/tIPList.txt
time/tIPList.txt
echo===========IPList.txt
< p>For/L%%fin(1,1,100)DoPing.exe-n2192.168.1.%%fFind"Requesttimedout. "echo192.168.1.%%fTimedOut
IPList.txtechooff
< p>clsEchoFinished!
@Echoon
Notepad.exeIPList.txt
Save this file as IPTracker.bat and close the Notepad program.
Note that the entire ForInDo command in this batch file consists of several commands that are linked together by the word "For". The command starts with "For and ends with "Off, and the entire command must be on one line. Of course, if you want to use this method, you need to replace the IP address in the example with your own.
Further down the line, if the user wants to solve a DHCP problem, they can locate and double-click on the IPTracker.bat file in a browser window, which then launches an IP address tracking utility, a batch process that looks for only those unused IP addresses and saves the results to a Notepad file. (In this example, this saved 'batch file becomes an IP address tracking tool that can be created once and used over and over again.)
Telecom broadband subscriber side of common failures
Error code: 619
Failure analysis: the specified port is not connected to observe the cat and the network card indicator, abnormalities, check the network cable, the network card and the cat is normal; if the indicator is normal, re-plug and dial the network cable, restart the computer and the brain.
Error Code: 631
Failure Analysis: the user disconnects the modem from the computer connected to an operation disconnected, redial
Error Code: 676
Failure Analysis: the phone occupies the line to re-install the network card and the driver, reinstall the dialing software.
Error code: 678
Failure analysis: the remote server does not answer or through the WAN port to exclude the telecom project outside the possible causes are: 1 firewall or antivirus software, 2 cat or network card is blocked by data, restart, 3 network card is disabled or driver error, in the device manager to open the network card or re-installation of the driver can be 4 PPPOE protocol is lost 5 too many telephones in the home or some do not have the sets of Low pass (filter or separator). Also, error 678 may occur when the voltage is unstable.
Error Code: 691
Failure Analysis: Access denied due to invalid username/password on the domain Possible causes include wrong user domain, username, password, broadband arrears, wrong number of restricted users, non-valid time for internet access and wrong port binding.
Error Code: 692
Failure Analysis: modem off, out of order or no reliable connection to the computer reinstallation of the network card to solve
Error Code: 718
Failure Analysis: waiting for a valid response from the remote computer connection timeout
;Excluding the telecommunication engineering, you can reinstall the dial-up software or rebuild the connection (mostly for XP systems). Mostly used for XP system)
Error Code: 720
Failure Analysis: Connection attempt fails to reinstall the dial-up software because your computer does not have the same PPP control protocol as the remote computer, if it doesn't work restore the system or reinstall the system (turn off the automatic update).
Error Code: 769
Failure Analysis: unable to connect to the specified target network card driver is disabled or abnormal driver, by enabling or reinstalling the driver to solve
Error Code: 797
Failure Analysis: the same as the 769 (more often in the 2000 system)
Increased scanner noise
Failure phenomenon: Scanning emits a lot of noise.
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, there will be people 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 usually occurs in the case of poor office environment. 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 pass