Scanner is a widely used computer input devices. As optical, mechanical integration of high-tech products, it is our common office equipment, but it is a failure if we do nothing will be some failures require professional repairs, there are many failures are their own can be ruled out. Here, we show some common troubleshooting method:
First, the demolition of the scanner
In the maintenance and repair often require demolition when the scanner, so the scanner first to introduce the basic method of demolition:
1, first remove the glass platform to reach into holes with a Phillips screwdriver unscrew the screws in, you can remove the top cover up and glass platform. Open the scanner, you can see the stepping motor, belts, scanning head and circuit boards and other components. Some of the upper and lower parts of the scanner is not a plastic buckle with screws but the convergence of dismantling a small screwdriver with a flat pry the plastic snaps into the slot, you can separate two parts, prying action to light when the plastic buckle not to damage the Dell latitude d600 battery plastic parts.
2, unplug the data cable soft. Scanner internal circuit boards generally have two – block fixed in the scan head back, and the other – the scanner block installed in the rear, two soft circuit boards through the data cable connected. Remove the scan head must be removed before the data cable soft. Soft cable card data in the circuit board cable card slot, remove the soft cable is required on both sides of the first cable card slot allocated outside sales, then you can easily draw out the soft cable .
3, the removal scan head. Most of the scan head in a circular rod wear (rail), driven by the belt along the longitudinal motion of the scanner, just circle the plastic rod from the deck of the base removed from the belt to the scan head can Remove the scan head and round up the rod, and will be out of round metal bar from the scanning head.
4 Remove the tubes. Scan head lamp at the top, placed horizontally along the scan head, the card in the scan head on both sides of the plastic deck, and its power supply plug is inserted in the scan head and the back of the circuit board. Simply remove the lamp power supply circuit board plug, you can remove the tube from the scan head. Only the finest tube matchstick thickness, remove, place the required care.
5, removal of circuit boards. Unscrew the two screws to remove the scan head of the board, the board can see the front of the CCD DIP package devices. CCD devices are required because the optical path of the scanning optical lens, the installation will affect the scan quality to restore properly, the proposed scanning head Do not remove the circuit board.
Second, the common fault of exclusion
1, the entire image is acquired only a small part of the
Failure and exclusion: Focus rectangle is still stuck in the preview image; only the rectangle of the area to be retrieved. After focusing in the finish, remove the focus rectangle click, trial and Dell latitude d830 battery error to get the images.
2, there are too many image patterns (noise)
Failure and exclusion: the working environment of the scanner humidity exceeded its permitted range (perhaps outside the scope of the scanner is allowed to be stored or transported.) Let scanner working within the allowable range. Turn off the computer, and then turn off the scanner, then turn on the scanner first, then open the computer to re-calibrate the scanner.
3, the color difference between the original color and the screen is too large
Failure and exclusion:
(1) Check the screen of the color, brightness and contrast settings are in line with the normal requirements.
(2) Check ColorLinks screen configuration options are correct.
(3) If FotoLook is running under Photoshop plug-in, check the File-Preferences Monitor Setup, Printing lnks Setup and Seperation Setup are correct.
(4) Assuming the above settings are correct, you can do something in between the scanner and the display color correction.
4, scan the entire image distortion or blurred
Failure and exclusion:
(1) the scanner glass is dirty or dirty bar mirror; glass with a soft cloth and clean the mirror bar.
(2) Scan the original documents were not always flat against the document table; ensure scanned always flat on the platform.
(3) ensure that the files do not move during the scan.
(4) scanner during the scan produced by placing uneven vibration; attention to the Dell inspiron 2500 battery scanner placed on a smooth surface.
(5) adjust the exposure settings of software or “Gamma” setting.
(6) If the above occurs parallel port scanner, transmission lines may be a problem, we recommend using these high-performance IEEE-1284 cable.
5, scan the image on the screen display or printed output always appears the phenomenon of loss of points and lines
Failure and exclusion:
(1) Check whether the scanner’s sensor failure or file automatically appears in the paper guide and paper feeder institution fails, look for checks and maintenance professionals.
(3) of the scanner to do dust optical lens processing, with special best small vacuum cleaner.
(4) Check Scanner white calibration bar outside the cover if there is dirty, the need for timely clean.
(5) check whether the document glass is dirty or scratched, thoroughly clean the scanner can be regularly or replace the document glass to avoid this from happening. In the latter case should contact the local authorized technical service center.
6, scanning prints, the turtle pattern (cross image) appears in the image of a specific area
Cause of the malfunction and inspiron mini 10 battery troubleshooting: First, let us look at the simple principle of color print image. Try to take a magnifying glass look at the general color prints, in fact any graphics are composed by 4 colors, is often referred to cyan, magenta, yellow and black. The colors are very small dots (good color printing should have a resolution of 1200 dpi), using combinations of dots are arranged so that the eye illusions, such as certain areas are more red dots, the human brain’s visual system bias that this area will be red. This small network, when the scan will be detected by sensitive light-sensitive component out, so the results of the scan lines of a variety of whole picture will appear, seriously affecting the quality of scanned images. Can use several options to avoid the generation of moire.
(1) In the “Image Type” select “color photos” (to reticulate) settings, or in the “image type” dialog box, select “go to reticulate” setting.
(2) between the file and place a transparent platen page, defocusing the image.
(3) The correct positioning of the image.
(4) the small inspiron 9400 battery image size can be adjusted slightly.
(5) the TWAIN scanner select the “Clear Edge clarity” check box.
