Printer Common ten Trouble Analysis 1th/2 page _ Hardware Maintenance

One, the printer output blank paper

For the stylus printer, the reason for the paper blank is mostly due to the dry color ink, ribbon break, print head damage, etc., should be replaced in a timely manner or maintenance of print head; For inkjet printers, caused by the failure of printing blanks are mostly due to nozzle jams, ink cartridges, etc., should clean the nozzle or replace ink cartridges; for laser printers , the cause of this type of failure may be that the developer roller is not sucked to the toner (the development roller DC bias is not added), it may also be the photoconductor drum is not grounded, so that the negative charge can not be released, the laser beam can not be in the photosensitive drum function.

In addition, the laser printer's photoconductor drum does not rotate, there will be no image generated and uploaded to the paper. Disconnect the power from the printer, remove the toner cartridge, open the notch on the lid of the box, and then reload the machine with a mark on the photosensitive part of the photoconductor drum. Boot run for a while, and then remove the check mark is moved, you can determine whether the photoconductor drum is working properly. If the toner can not be normal supply or laser beam is blocked, there will be the phenomenon of printing blank paper. Therefore, should check whether the toner is used up, the ink cartridge is properly installed in the machine, sealing tape has been removed or laser irradiation on the channel whether there is shelter. It is important to note that the power must be turned off when checking, as the laser beam may damage the operator's eyes.

Second, the printing paper output black
　



　
　
For the stylus printer, the cause of the failure is color band hair removal, color tape on too much ink, print head dirty, color band quality and put too close to the position, overhaul should first adjust the position of putt, such as failure can not be excluded, and then replace the ribbon, cleaning the print head, generally can be ruled out; for inkjet printers, Should focus on whether the nozzle is damaged, ink pipe is broken, ink model is normal, etc. for laser printers, most of the corona discharge wire failure or control circuit failure, so that the laser has been launched, resulting in black print output content. Therefore, it is necessary to check whether the corona discharge wire has been disconnected or whether the corona high pressure exists, and whether the beam detector in the laser beam path is working properly.

Third, the printed characters are not complete or the characters are not clear

For inkjet printers, there may be two reasons, ink cartridges, printer for a long time without or exposure to direct sunlight caused the nozzle plug. The solution is to change the new cartridge or ink, if the cartridge is not used up, you can conclude that the nozzle is blocked: Remove the ink cartridge (for ink cartridge nozzle is not one printer, need to remove the nozzle), put the nozzle in warm water soak for a while, pay attention to the circuit board must not be part of the immersion, otherwise disastrous consequences.

For stylus printers, there may be several reasons: the printing ribbon is used too long, the printhead has not been cleaned for a long time, too much dirt, there is a broken needle in the print head, and a faulty print head drive circuit. The solution is to adjust the print head and print roll between the spacing, failure can not be ruled out, you may change the new ribbon, if not, you need to clean the print head. The method is: Remove the two captive screws on the printhead, take the print head off, clear the print head with a pin or a small hook, after the inclusion of the dirty, is generally a long time to accumulate the ribbon fiber, and then in the back of the print head to see the needle drop a few drops of instrument oil, to remove some dirty, do not install color belt empty dozen pieces of paper, and then put the color belt, This problem can be basically solved, if it is the print head broken needle or drive circuit problems, you can only replace the print needle or drive tube.

Four, printing handwriting is light

For the stylus printer, the cause of this type of failure is mostly ink drying, the print head breaks the needle, the push rod position adjusts too far, may use the replacement color belt and the adjustment putter method to solve; for inkjet printers, nozzle blockage, ink dry, ink model is incorrect, inking pipe into the air, Printer operating temperature is too high will cause this fault, should be the nozzle, ink box, etc. for testing and maintenance; For laser printers, when the toner cartridge in less toner, the development of the voltage of the development roller and ink photosensitive effect is poor, will also result in the printing of weak handwriting. At this point, remove the toner cartridge gently shaking, if the printing effect does not improve, you should replace the toner cartridge or adjust the printer toner cartridge under a group of photosensitive switches, so that the sensitivity of the ink powder and matching.

Five, the writing side clear while the other side is not clear

This phenomenon generally appears in the stylus printer, inkjet printer may also appear, but the probability is small, mainly the print head guide and print roll is not parallel, resulting in the distance between the two are nearly caused by. The workaround is to adjust the spacing between the print head guides and the print rollers to make them parallel. The concrete method is: loosen the adjustment piece of the two sides of the print head Guide respectively, turn the adjusting piece of counterclockwise to reduce the gap, finally the print Head guide rail and print roll adjust to parallel can solve the problem. However, pay attention to adjust the direction of Si Cho, you can gradually adjust, more than a few printing.

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