The solution of special malfunction of USB scanner

Symptom one: A new USB scanner just bought in the beginning of use, everything is normal, but not for a long time, it is found that the scanner in the process of work, there is a large "ka ka" vibration sound issued, accompanied by vibration, scanner's scanning lamp tube often appear a short pause, Eventually the scanned image also appears intermittent traces, and the overall effect is not very clear. After removing the top cover of the USB scanner and running the scanner, I found that the scanner was working without shaking sound and everything was working again, but after reinstalling the top cover again, the USB scanner ran the same fault, what is the reason?

Failure Analysis: After the top cover of the scanner is opened, careful observation of the scanner, found in the scanner plate glass below, in other words, is in the scanning lamp stent and scanner body contact place, there are two long friction traces, it is clear that this is the lamp stent in operation due to the obstruction of friction produced. After removing the plane glass plate, the tube bracket in the operation of the slide will be close contact with the plane glass plate, plus the lamp bracket on the spring on the upward squeeze, the slide and the plane glass plate squeeze more tightly, so once they between the extrusion plane appears any dry or damaged, Scan the lamp in the mobile will be very big resistance, so that there is a big "ka ka" vibration sound, long run we will be able to see the flat plate glass under the two friction traces, which is why just start using the scanner, the scanner can work properly the reason; And once the scanner has been running for a long time or if the scanner is in a high temperature working environment, scanning tube in the continuous operation of a lot of heat generated by the slide and lamp frame glue gradually seepage, affecting the slide and flat plate glass contact between the smooth surface, resulting in the lamp frame run by a lot of resistance; Especially in the scanner installed above, the tube at both ends of the slide and flat plate glass between the contact resistance is even greater, so more prone to failure, and when the upper cover, slide and flat plate glass between loose, so as to ensure the smooth operation of the lamp.

Troubleshooting: To resolve such a failure, we can first use similar alcohol and other detergent to the plane glass and two pieces of slippery surface of the glue and dry stains wiped clean, if the slide surface has broken or rolled, we can use Scotch tape or even strong glue will repair the damage of the smooth, in a word, To ensure that the lamp bracket at both ends of the slide and glass panel interface smooth, only in this way to ensure that the scanner will not appear in the operation of "Ka-click" Vibration Sound.

Symptom two: ACERTRAVELMATE260 notebook computer, installed the Windows XP operating system, because the need to deal with the image, the unit of a USB scanner acer640u, plug into the notebook's USB port, And in strict accordance with the scanner installation sequence correctly installed the scanner driver. After the installation, the author to verify the installation is correct, but also to the scanner test, the test results show that everything is normal. However, in the real scan of the picture, the scanner is always reminding the author, to the author to re-examine the scanner power cord is connected, the scanner's signal cable is good, but the author carefully will power connector, cable Connection line again after checking, found that they are connected to normal, but again let the scanner work, the scanner still " Indifferent "; then had to remove the installed scanner, and then reinstall, the final result is still no response, what is the reason?

Failure Analysis: There are many possible reasons for this failure, such as the scanner itself if there is a problem, it is possible to have such a fault hint; and if the scanner cable failure, we users can see such a hint, but the author because of the test scanner in advance, the scanner display correct, This indicates that the scanner cable should not be faulted, and that if you install the driver after inserting the scanner into the USB port, the USB scanner will certainly fail; the last reason may be on the driver, if the scanner driver is damaged, Or the scanner program is older, it is likely to make the scanner work is not normal.

Troubleshooting: Find the "crux" of the problem, the problem will naturally be solved. In order to verify that the scanner itself is faulty, we can take it to another computer, reinstall it, and make sure that both computers are installed with the same operating system, for example, here we have to make sure that another computer is also installed Windows XP operating system, Only in this way can we rule out the possibility that the problem will not occur because the operating system does not support the USB interface, and if the scanner works on another computer, the failure on the top is irrelevant to the scanner itself, and to ensure that the scanner is installed in the correct order, The correct installation sequence should be to install the scanner driver first, when the program requires us to install the scanner, and then insert the scanner into the notebook's USB port; Finally, we will check the scanner driver, in order to ensure that the driver is correct, the author also tried to remove the installed scanner, and then reinstall , but because the author after the removal of the scanner reinstall, the scanner and notebook has been connected, so the reinstall has not been successful, at this time we can use the driver upgrade method, to repair the damaged driver. When you upgrade, first open the Control Panel Operation window, and double-click the System icon in the window, the next pop-up Device Manager page, double-click on the Imagingdevice, and then the author found that under this page there is a acercolorflatbedscanner640u, This means that the current notebook has a USB scanner installed, click with the mouse to allow the ACER640U scanner to be selected, and then click the Activated Property button with the mouse, and then in the Scanner Properties dialog box that appears, select the Driver tab and click the "Upgrade Driver" button. The system will then appear with the Driver upgrade prompt box, we just follow the default settings, let the notebook computer automatically search for the driver, once the system prompts to find the corresponding scanner driver, use the driver to complete the scanner driver upgrade work, and finally restart the computer, found that the scanner can be used normally.