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復印機最常見五類故障的分析與解決

'復印機最常見五類故障的分析與解決'
?復印機最常見五類故障的分析與解決Failure phenomenon one: after using a period of time, the "card paper" failure phenomenon often appears in photocopyAnalysis and maintenanee: according to the phenomenon of failure, the following four situations can be analyzed:Check that the opposite roll is normaL The vertical rolls are located on the lower and lower sides of the paper? They are the hard rubber rollers that break the paper box and then move the paper forward? As you know, the copiers are in the paper part of the paper, which is the paper channel. Lost due to the use of lead to lose of tape on the paper guide roller after a period of time can cause excessive rubber aging, wear or product due to poor surroundings with lots of paper scraps, dust and other impurities, resulting in the slot of lugs will be accompanied by a large number of paper scraps, dust, and thus reduce the tire friction or feed belt because of aging and stretched, thus causing character copy to feed after the parts send out or send does not reach the designated position, make the feed movement, fixing/paper movement cannot be synchronized, on the front panel shows a "card" fault signa1. If you change the same type of rubber and paper tape, it is not only expensive, but also long and difficult to buy. To save the limited funds, according to operation procedures, in turn, remove the feed components, and then to find a few times in nearby printer paper paper, cut open on the other side, then on to tire paper sets ,zcolum-省略部分-is accompanied by a burnt smellAnalysis and maintenance: turn on the cover and find that the main power source in the photocopier is burnt and not working? Check in the multimeter and find that the integrated circuit STM1240 chip in the main power supply is partially burned? The integrated circuit chip is difficult to buy on the market? Because there is no ready-made circuit principle diagram, can be controlled real figure, for the maintenance of one by one, after careful analysis, found that integrated circuit STM1240 chip internal damping high frequency high power tube for anything?The integrated circuit chip can be replaced by two colored line D1246? The steps are as follows:1, the burned integrated circuit STM 1240, removed from the radiator board?Five pins of the original integrated circuit chip are welded from the printed circuit board using five approximately 5CM flexible wires.3, the two color TV manager D1246 pin up on the hot plate, and one just emitter with another tube collector nipple into push-pull working state;To weld the third leg of the original integrated circuit STM1240 into the short fuse? The second leg of the substrate for the tube of the integrated electrode? The first line of the integrated circuit STM 1240 chip. The fourth leg of the STM1240 chip integrated circuit? The remaining transmitter is the fifth leg of the integrated circuit STM1240 chip? Once the check is done, the machine will be installed again, and the failure will disappear?
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分析 解決 常見 故障 復印機
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