CLASS/SUB/PROTOIf the device implements one of the standard device classes, then the VID/PID don't matter nearly as much as the class codes. The is kept reasonably up to date, and may be the quickest way to just look up a vendor name.Windows will match a driver as specifically as it can, so a vendor can bug-fix a product without using up one of their precious PID codes by modifying the revision code, and produce a driver that compensates for the bug in old devices by matching it to the triple of VID/PID/REV. VID/PID/REVThe VID can usually be translated to an actual vendor name since vendors are supposed to buy VIDs and register with the. VID and PID can be read from the Details tab, by selecting Hardware Ids, and the Class and Subclass by selecting Compatible Ids. Finding VID, PID, REV, CLASS, SUBCLASS, PROTOCOL etc.In the general case, you should be able to extract the VID/PID and device class codes from the node in the device manager corresponding to the unknown device. After the printout, if you still have the same problems, remove the toner cartridge and install a. Vertical repetitive defects If marks repeatedly appear on the printed side of the page at even intervals: The toner cartridge may be damaged. Its not a general solution, but a USB to RS-232 interface cable has a high probability of being built out of either a chip, or a close relative of the chip.You can get driver packages for both easily on-line, and the odds that one is right are pretty good. Remove the toner cartridge and install a new one.
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