办公设备维修资料网复印机维修网打印机维修网传真机维修网一体机维修网打印机维修

1、办公设备维修资料网复印机维修网打印机维修网传真机维修网一体机维修网打印机维修The scanner consists of three parts, the optical part, the mechanical drive part and the electronic circuit part. Among them, the optical imaging part is the most precise design. Whether it is an optical lens or a reflection lens, a slight change will affect the

2、 quality of CCD imaging, and may even lead to the phenomenon that CCD can not receive image signals. Therefore, many scanner manufacturers have designed a locking device (mechanical device or electronic device), which is specially used for locking the lens assembly of the scanner. The factory locks

3、the scanners lens set when the scanner leaves the factory. The first step the user must do when purchasing the scanner is to unlock the lock lens group. Similarly, if the scanner requires long distance handling, the lens must be re locked.If your scanner is used under Windows98, you must pay attenti

4、on to the order of the boot. The correct boot sequence is to turn on the scanner first and then start the computer. This is because the Windows98 system will detect all devices and one login at startup, if the scanner is not open, the Windows98 system will not think that the current system of the sc

5、anner is a registered device, you refuse this equipment for access, have not the error on the online scanner.Second, its better to warm up the scanner for some time before you start scanning. When the scanner is open, the stability of the light source is poor, and the color temperature of the light

6、source does not reach the color temperature required for the normal operation of the scanner. Therefore, the output image is often not saturated enough. The best time to scan is after the scanner has been preheated for 20 minutes. In the use of the process does not have to shut down in the gap time,

7、 so that the quality of the image scanning is relatively stable.The best scan input entries are positive (transmission), followed by general pictures (reflections). If you have no better scanning materials, can be used as a print or negative scan materials. Because the printing in the printing with

8、cyan, magenta, yellow and black (CMYK) inks from different angles overprint, which leaves netted in print, as long as the use of a magnifying glass to watch print will find this phenomenon. Scanning the manuscript with a scanner also reveals this phenomenon on the screen, so you must solve the probl

9、em using moire techniques. And if the use of negative as scanning materials, due to the dynamic color gamut negative is very narrow, it is difficult to get ideal effect, then you can use negative correction technology. According to the characteristics of different negative brand building characteris

10、tics file relative, and simulate the exposure time of the camera, to control the exposure time of CCD, so that the output image has greatly improved on the basis of the original, as much as possible so that the scanning image quality to meet the demand for output.Disassembly of scannerIn maintenance

11、 and repair, it is often necessary to disassemble the scanner, so first of all, we introduce the basic methods of scanner disassembly:1., first remove the glass platform, cross the spiral hole into the round hole, unscrew the screw, then take off the top cover and glass platform. After you open the

12、scanner,You can see the stepper motor, transmission belt, scanning head and circuit boards and other components. Some scanner on the two parts instead of screws but with plastic buckle connection, disassembly with a flat screwdriver inserted into the gap in the small open plastic buckle can be separ

13、ated to two parts by prying the plastic buckle when the action should be light, do not damage the plastic parts.2. pull out data soft cable. The scanner usually has two circuit boards, the blocks are fixed at the back of the scanning head, and the other blocks are installed at the back of the scanne

14、r, and the two circuit boards are connected by data soft cables. Take to take off before the next scan head data soft line. When the soft cable is taken out, the pins on both sides of the cable and groove can be moved outwards, and then the soft cable can be drawn out easily.3. remove the scanning h

15、ead. The scan head wear mostly in round metal rods (rail), driven by the drive belt along the scanner longitudinal motion, only the circular metal rod from the plastic holder on the base of the scanning head off, from the transmission belt to remove the scanning head and round metal rod, and then th

16、e circular metal rod from scanning head out.4. remove the tube. The lamp is located along the scanning head, horizontal scanning head, plastic card holder in the scanning head on both sides, the power supply plug on the rear side of the circuit board scanning head. The lamp tube can be removed from

17、the scanning head only by removing the power supply plug of the lamp tube on the circuit board. The smallest tube is only the thickness of the match stick, so it should be taken care of when it is disassembled and placed.5. remove the circuit board. Unscrew the two screws, that is, the circuit board

18、 on the scanning head can be seen on the front of the circuit board to see the double in-line package of CCD devices. Because the CCD device is facing the optical lens in the scanning light path, the installation and reduction will affect the quality of scanning. It is recommended that the circuit b

19、oard on the scanning head should not be removed at random.Two, common causes and troubleshooting1. only a small portion of the whole image is takenCauses and exclusions: the focus rectangle still stays on the preview image; only the area inside the rectangle is captured. After youve finished focusin

20、g, click on the focus rectangle, and try again and again to get the image.2., there are too many patterns in the image (noise interference)Troubleshooting: working environment humidity scanner exceeded the allowable range of it (perhaps the scanner in the range outside the store or transport). Allow

21、 the scanner to work within the allowable range. Turn off the computer, then turn off the scanner, then open the scanner first, and then turn on the computer to recalibrate the scanner.3. the original color is too different from the screen colorCause and elimination of trouble:(1) check the color, b

22、rightness and contrast settings of the screen to meet the normal requirements.(2) check that the screen settings option for ColorLinks is correct.(3) if FotoLook is plug-in under Photoshop, check File-Preferences MonitorSetup,印刷的林克斯球场设置和分离设置是否正确。（4）假设上述设置皆正确时，可以做一下扫描仪与显示屏之间的色彩校正。4。扫描出的整个图像变形或出现模糊故障原

23、因与排除：（1）扫描仪玻璃板脏污或反光镜条脏污；用软布擦拭玻璃板并清洁反光镜条。（2）扫描原稿文件未能始终平贴在文件台上；确保扫描原稿始终平贴在平台上。（3）确保扫描过程中不要移动文件。（4）扫描过程中扫描仪因放置不平而产生震动；注意把扫描仪放于平稳的表面上。（5）调节软件的曝光设置或“伽马”设置。（6）若是并口扫描仪发生以上情况，可能是传输电缆存在问题，建议使用IEEE - 1284以上的高性能电缆。5。扫描的图像在屏幕显示或打印输出时总是出现丢失点线的现象故障原因与排除：（1）检查扫描仪的传感器是否出现了故障或文件自动送纸器的纸张导纸机构出现故障，找专业人员进行检查维修。（2）对扫描仪的光

24、学镜头做除尘处理，用专用的小型吸尘器效果最好。（3）检查扫描仪外盖上的白色校正条是否有脏污，需及时清洁。（4）检查一下稿台玻璃是否脏了或有划痕，可以定期彻底清洁扫描仪或更换稿台玻璃来避免该情况的发生。后一种情况应与当地授权技术服务中心联系。6。扫描印刷品时，龟纹（交叉影像）出现在图像的特定区域内故障原因与排除：首先让我们来了解一下彩色印刷品成像的简单原理。试着拿放大镜观察一下一般的彩色印刷品，其实任何图文都是通过4种颜色来组成，就是经常提及的青色、品红色、黄色与黑色。这些颜色是很细小的墨点，利用墨点的排列组合方式让眼睛产生错觉，比如某一区红色的墨点比较多，人脑的视觉系统就会以为这一区偏红色。这

25、样细小的网点，在扫描的时候会被灵敏的感光组件所侦测出来，于是扫描的结果会让整张图片有各种纹路出现，严重影响扫描图像的品质。可以采用以下几种方案来避免龟纹的产生。（1）在”图像类型”中选择”彩色照片”（去网纹）设置，或在”图像类型”对话框中选”去网纹”设置。（2）在文件和稿台间放置一张透明页，使图像散焦。（3）正确定位图像。（4）可稍调小图像尺寸。(5) in the TWAIN of the scanner, select the clear edges clear check box.Last page, 12345, next pageThree, how to clean the sca

26、nnerAs you know, scanners are a very delicate device with a lot of optical devices in it. If they get dirty, they will definitely affect the scanning effect. But we can not only use in dust-free environment, this is too unrealistic. Since it is impossible to take preventive measures, then only after

27、 the cost of more effort, so regular cleaning is certainly indispensable.Figure 1 clean optical componentsWell, the spring cleaning begins. We need to take a piece of soft cloth to the scanner shell (excl. glass plate) wipe it again, its purpose is to remove the surface dirt, prevent water wipe off

28、the housing to get more flowers. Next, wipe the shell carefully with a damp cloth. Notice that the cloth is not too wet. It is better not to let the water out during the cleaning. In some scale very thick, can stick some washing powder in the wet cloth, then rub a few on it, and dont forget to use a

29、 clean damp place to washing powder and then wipe it again.Figure 2 clean sliderThen open the scanner, before it is best to lock it behind the lock. If you find the thick dust, can blow the balloon blow, then you can blow the dust fall down, dont forget to cover up the scanner during this period of

30、time, or just do it becomes useless. At this time, you can buy a bottle of distilled water, the supermarket will do, and finally find a small group of non absorbent cotton spare.Find the light emitting tube, mirror it in optical component scanner, the cotton with distilled water wet, wet and dry and

31、 no water to push extrusion as well. Then carefully wipe on the light tube and the mirror (see Figure 1). Be sure to light and do not change the position of the optical parts.If you find some mobile scanner noise during use, it may be a sliding rod or above the oil deposit, you can find some oil on

32、the sliding bar on your face (see Figure 2), increasing its degree of lubrication, noise problems can be basically solved.After all the cleaning has been completed, the machine will be installed. Finally, you will clean the scanners flat glass with a clean wet cloth. Then you will see a brand new sc

33、anner in front of you.Last page, 12345, next pageFour, the scanner magical experienceScanners are used when digital cameras are usedAs we all know, scanners and digital cameras use photoelectric devices (usually CCD or CMOS) to obtain graphic and image information, but only in different forms. The p

34、hotoelectric device of a scanner is strip shaped, and the process of recognizing patterns is motion. The photoelectric device moves from one end of the picture to the other, scanning, while the photoelectric device of the digital camera is matrix, and the process of operation is instantaneous. Occas

35、ionally，We do not need to hold the camera around, if you need to shoot a scene, or a manuscript you need an illustration, but you only have your scanner, it might be the first to take a photo, photographs, and other photos to scan a photo after several twists and turns finally came the computer, but

36、 the effect as can be imagined. We can completely transform the scanner into a digital camera.The scanner requires that the scanned object be flat, especially the scanner that uses CMOS as a photosensitive device recently. We can imitate the principle of digital camera and add a convex lens to the s

37、canner. The goal is to make the scene imaged on the scanners platform and then turn on the scanner as if sweeping an ordinary picture.If you need to shoot a lot of scenery or still life, use a scanner. That would save an expensive digital camera investment.If you happen to have an obsolete camera (p

38、referably a one - off camera), you can take it off and use it as a digital camera lens. Because the scanner is very slow, it may take a lot of effort to focus on it. So it is best to use a short focus camera lens, so that the focus will not be very big impact. Of course, youll have to fix such a dev

39、ice, or youll have to follow the ceiling (see Figure 1 for details).Finally, the remaining parts of the scanner platform were covered with black paper, and a DIY digital camera was born.In fact, the use of the method is very simple: when you need to shoot the scanner side camera as a proper rotation

40、 statue, the camera lens in front of you to shoot the scenery. If the scanners connection is long enough, you can also adjust the distance between the scanner and the scene to achieve the best photography effect.General scanner used as a film scannerScanning the transparent film with an ordinary sca

41、nner must not be done with a scanner with a sweeping adapter. And the scanner with this function is very expensive.With sweeping function, one can scan the transparent film, and the two is to scan the film directly. In fact, as long as we make some changes to the general scanner, we can also achieve

42、 this effect.When scanning a normal picture, the light tube in the scanner projects light onto the image surface, while the light source is projected from the back of the film. In fact, the principle we need to change is to turn off the light source inside the scanner, and then add a light source to

43、 the back of the film to be removed. Closing the internal light source of the scanner is an important step. If your electronic level is not high, you can find an electronic friend to help. Its better to make a switch and put it on the case, so it wont affect the normal use.Of course, in the remainin

44、g part of the scanner platform to cover with black paper to prevent exposure. As for the new light source, the most common fluorescent lamp can be used.The location of the light source should not be too close to the scanner. It is better to be around 10cm. In fact, many of the high-end scanners are

45、equipped with a projection scanning adapter that works the same way as the devices introduced in this method (see Figure 2).There is also a simpler method, but it is not easy to succeed. Do not make any changes to the scanner. Just put the film to be placed in the scanner, and put a mirror of almost

46、 the same size on the back of the film. Then scan it as a regular method. This method is very demanding for scanners, and may not be applicable to some scanners.Five 、 scanner, alternative use, broadcast3D scanWe usually use the flatbed scanner which was usually only for scanning plane graphics, lik

47、e photos, manuscripts like, in fact most sensors using the CCD scanner can scan 3D objects. That is, you can use a digital camera as a scanner to shoot objects, and directly convert small and medium objects into digital images. Do not believe, you can try to put a card on the scanner glass display p

48、latform, although the glass plane card scanner device and a certain distance, but in the scanned picture will be pleasantly surprised to find that the naked eye can not distinguish the original component identification and integrated circuit pin can see clearly. According to the use of experience, t

49、he general use of CCD sensor scanner, you can clearly scan the height of less than 30mm in the 3D object, that is, with 30mm depth of field. The author uses CCD scanner to scan a display card, or is it quite stereoscopic?. Heres how to scan solid objects.AP 1. will need to scan the object is positio

50、ned in a scanning platform, covered with a piece of paper. The purpose of white paper is to scan the light source to illuminate the side of the scanned object, which is the key to the implementation of the 3D scan.Which was 2. according to need to choose the scanning resolution, if it is a contribut

51、or to the newspaper of the black and white picture, choose 150dpi, 256 level grayscale scanning of gray-scale images, for the average size of the object, in this way the scan can fully meet the requirements of printing.Which was 3. scanned images, mainly is to remove the scattering fringe scanning i

52、n the background picture. The easiest tool to handle images is probably the Windows95/98 in the annex to the drawing, and use the drawing tool in the circle, eraser tool to remove the scanning image in the background of the scattering stripes, coupled with the text logo, that is completed. Of course

53、, if you need to store your image files in other formats other than BMP, you can also process them via Photoshop and other image processing software.Simulated copierThe brand with the printer and scanner and the rapid decline in the price of many friends, the two come home. If so, Ill teach you a tr

54、ick and simulate the scanner as a copier. This software is Photocopier, the manuscript is controlled by the scanner scan, and then output directly by the printer. If the quality of the original script is better, the copy effect is no less than that of the ordinary copier.The brand is a Photocopier f

55、or Windows95/98/NT/2000 operating system platform prepared by office sharing tool software. The latest version is 2.17, which can be downloaded via the link /cp.exe, which is 709KB in size.Which was the first download after installation, scanner and printer ready, and then to copy files placed on th

56、e scanner, and then start Photocopier, open the window. The interface after the operation of Photocopier is shown in Figure 2, and its operation is very similar to that of an ordinary copier. The work window is divided into 6 functional areas, the top of which is used to display information during t

57、he work process. The three buttons at the top left are used to set the copy mode, in which CopyIn Black and White is black and white copy, Copy in Grey Scales is grayscale copy, Copy inColor is a color copy. If you want to use some copy, just click the button so that the red box appears on the left.

58、 For plain black and white scripts with only a few pictures inside, it is recommended to use CopyIn Black andWhite way. It copies things clean and faster. If you have a color printer and want to copy a color document, you can use Copy inColor way. If you want to copy the color changes slowly or cont

59、ain large pictures of color copies, but only black and white printer on hand, then select Copy in GreyScales is better.The two buttons to the left middle of which was marked with 100% and 70% of the proportion of copy setting. Click the 100% button to press the size of the original without zooming c

60、opies. The size of the printed paper used should be the same as the original. For example, the original is A4 and the printed paper should be A4. Click the 70% button to reduce the original to the original 70% copy, and you can choose the right type of printing paper according to this ratio.Which wa