The laser then etches the letters and images to be printed as a pattern from the corona wire.Ĭleaning of the corona wire is necessary before you replace toner cartridge of your Brother MFC-9340CDW. The printer emits a laser beam across the surface to discharge specific or certain points while the drum rotates. When the corona wire is charged, it gives the drum a positive static charge then the drum transfers the charge to the paper that in turn attracts the toner to the paper. It is charged with static electricity that draws the toner off the drum on to the paper. Cleaning the corona wire regularly ensures a long service life.Ĭorona Wire – What It Is and How It WorksĪ corona wire is a very fine wire made from tungsten as base material. Some not so commonly known parts such as the corona wire, also needs attention in order to keep the printing crisp and neat. Your Brother MFC-9340CDW all-in-one color laser printer is no different and it’s also important to know what parts of the printer need attention may it be as mundane as cleaning the flatbed glass in keeping the scanner clean or replacing an essential part such as the drum and toner assembly. Regular maintenance is necessary to keep your printers in tip top condition.
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