For the dot matrix printer, the cause of the blank of the printing paper is mostly due to ink ribbon drying, ribbon breaking, and print head damage. The ribbon should be promptly replaced or the print head must be repaired. For inkjet printers, the majority of problems that cause blank printing are caused by failures. Because the nozzle is clogged, the ink cartridge is not ink, etc., the nozzle should be cleaned or replaced; for a laser printer, the cause of this type of failure may be that the developing roller is not sucking toner (the DC bias of the developing roller is not added), It may be that the photosensitive drum is not grounded, so that the negative charge cannot be released to the ground, and the laser beam cannot function on the photosensitive drum.
In addition, if the drum of the laser printer does not rotate, no image will be generated and transmitted to the paper. Disconnect the printer, remove the toner cartridge, open the notch on the lid, and mark the non-photosensitive part of the drum and reload it. After booting for a while, and then checking out if the check mark has moved, you can judge whether the photoconductor drum is working properly. If the toner cannot be supplied normally or the laser beam is blocked, blank paper will also be printed. Therefore, check that the toner is used up, that the ink cartridge is properly loaded in the printer, that the sealing tape has been removed, or that there are no obstructions on the laser light path. It should be noted that the power must be turned off during the inspection because the laser beam may damage the operator's eyes.
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