Now the printer has become a computer product that people often use in their work and life, and because it is a frequently used product, people often encounter some problems of one kind or another, and if these problems are repaired by maintenance personnel, it will not only cost some money, but also delay work. In fact, the interior of the printer is not complicated, and the general problems can be solved by the users themselves. Here I will introduce some simple maintenance methods to you.
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Maintenance methods of common faults of printers 1. The printing is illegible.
For inkjet printers, there may be two reasons: the ink cartridge is used up, the printer has not been used for a long time, or the nozzle is blocked by direct sunlight. The solution is to replace the new ink cartridge or inject ink. If the ink cartridge is not used up, it can be concluded that the nozzle is blocked: remove the ink cartridge (for printers with non-integrated ink cartridge nozzles, the nozzle needs to be removed), soak the nozzle in warm water for a while, and be careful not to partially immerse the circuit board in water, otherwise the consequences will be unimaginable.
For the stylus printer, there may be the following reasons: (1) The printing ribbon has been used for too long; The print head has not been cleaned for a long time, and there is too much dirt; The needle of the print head is broken; The print head drive circuit is faulty. The solution is to adjust the distance between the print head and the print roller first. If the fault cannot be eliminated, you can replace the ribbon. If it doesn't work, you need to clean the print head. The method is as follows: remove the two fixing screws on the print head, remove the print head, and remove the dirt before and after the print head with a needle or a small hook, which is usually a long-term accumulation of ribbon fibers, and then drop a few drops of instrument oil behind the print head where the needle can be seen to remove some dirt. Put some paper instead of ribbon, and the problem will be basically solved. If the print head has a broken needle or a drive circuit problem, it can only be solved.
Second, large files cannot be printed.
This situation is more common in laser printers. It may be normal when printing small files, but it will crash when printing large files. This problem is mainly a software failure. You can check the remaining space on the hard disk, delete some useless files, or inquire about the amount of printer memory, whether it can be expanded.
Third, the printing is incomplete.
If you encounter such a problem, it can definitely be said that it is caused by a software failure. You can change the print interface settings in Windows95/98 and select? Start? Settings? Control panel? System? Equipment management? Port? Printer port? Driver? Change drivers? Show all devices? , will it? ECP print port? Change to? Printer port? After confirmation.
Fourth, the printing effect is different from the preview.
Usually, this happens in a text editor, such as Word or WPS2000. When previewing, it was clearly in a neat format, but when printing, I found that some fonts overlapped. This situation is generally caused by improper settings when editing. The solution is to change the file? Page properties? Paper size, paper type, words per line, etc. It can be solved under normal circumstances.
5. There is no response after selecting a printer to print.
Generally encounter this kind of situation, the system will generally prompt? Please check whether the printer is online and the cable connection is normal. . The general reason may be that the printer power cord is not plugged in properly; The print cable is not connected correctly; Poor contact; Computer parallel port damage, etc. There are mainly the following solutions:
1. If it doesn't start normally (that is, the power light doesn't work), first check whether the power cord of the printer is connected properly, then plug it in after turning it off, and try another power socket to see if it can be solved.
2. If the printer can be started normally after pressing the printing power switch, enter the BIOS settings to check the parallel port settings. Ordinary printers use ECP mode, and some printers do not support ECP mode. You can use ECP+EPP at this time, or? Normal? Way.
3. If the above two methods are ineffective, it is necessary to check the print line. First, turn off the computer, unplug both ends of the print cable, and then plug it in again. Be careful not to plug in the electricity. If the problem cannot be solved, please try another print cable or use other methods.
Six, the printer output blank paper
For stylus printers, the blank of printing paper is mostly caused by dry ink ribbon, broken ink ribbon and damage of print head. Replace the ribbon or repair the print head in time. For inkjet printers, most of the faults that cause blank printing are because the nozzle is blocked and the ink cartridge is out of ink, so it is necessary to clean the nozzle or replace the ink cartridge. For the laser printer, the reason for this failure may be that the developing roller does not absorb the toner (the DC bias of the developing roller is not applied), or the photosensitive drum is not grounded, so that the negative charge cannot be released to the ground and the laser beam cannot act on the photosensitive drum.
In addition, if the photosensitive drum of the laser printer does not rotate, no image will be generated and transmitted to the paper. Disconnect the printer power supply, take out the toner cartridge, open the notch on the box cover, mark the non-photosensitive part of the photosensitive drum, and reload it into the machine. Turn it on for a while, then take out the inspection mark to see if it has moved, so as to judge whether the photosensitive drum works normally. If the toner cannot be supplied normally or the laser beam is blocked, the phenomenon of printing blank paper will also occur. Therefore, it is necessary to check whether the toner is used up, whether the ink cartridge is correctly loaded into the machine, whether the sealant tape has been removed or whether there are any obstacles in the laser irradiation channel. It should be noted that the power supply must be turned off during the inspection, because the laser beam may hurt the operator's eyes.
Seven, printing paper output black.
For the stylus printer, the reasons for this failure are ribbon depilation, too much ink on the ribbon, dirty print head, poor ribbon quality, too close adjustment of the push rod position and so on. During maintenance, the position of the push rod should be adjusted first. If the fault cannot be eliminated, the fault can generally be eliminated by replacing the ribbon and cleaning the print head. For inkjet printers, it is important to check whether the nozzle is damaged, whether the ink tube is broken and whether the ink model is normal. For laser printers, it is mostly due to the failure of corona discharge wire or control circuit, which makes the laser emit all the time, resulting in the printed content being completely black. Therefore, it is necessary to check whether the corona discharge wire is disconnected or corona high voltage exists, and whether the beam detector in the laser beam path works normally.
The repeated smudges of stylus printer are mostly caused by depilation of ribbon or excessive ink, which can be eliminated by replacing ribbon box; Repeated soiling of inkjet printers is caused by ink leakage from ink cartridges or ink delivery pipes; When the performance of the nozzle is poor, the ejected ink and the remaining ink can not be well disconnected and are in a balanced state, and ink leakage will also occur; However, this phenomenon in laser printers has certain regularity. When a piece of paper passes through the printer, the 12 roller in the machine rotates more than once, the largest photosensitive drum rotates 2-3 times, and the paper feed roller may rotate 10 times. When there are equally spaced stains on the paper, it may be caused by dirty or damaged rollers.
Eight, the printing color is light.
For stylus printers, most of these failures are caused by dry ink ribbon, broken needle of print head, and the position of push rod is adjusted too far, which can be solved by replacing ribbon and adjusting push rod. For inkjet printers, nozzle blockage, over-drying ink, incorrect ink model, intake of ink duct and high working temperature of the printer will all cause this kind of fault, so it is necessary to detect and repair the nozzle and ink cartridge. For laser printers, when there is less toner in the toner box, the developing voltage of the developing roller is low, and the photosensitive effect of the toner is poor, the printing handwriting will be lighter. At this point, take out the toner cartridge and shake it gently. If the printing effect is not improved, replace the toner box or adjust a set of photosensitive switches under the printer toner box to match the photosensitive sensitivity of the toner.
Nine, when printing, the handwriting is clear on one side and unclear on the other.
This phenomenon generally appears in stylus printers and inkjet printers, but the probability is small, mainly because the print head guide rail and the print roller are not parallel, which leads to the distance between them being far and near. The solution is to adjust the distance between the print head guide rail and the print roller to make them parallel. Specifically, the problem can be solved by loosening the adjusting pieces on both sides of the print head guide rail, rotating the adjusting pieces counterclockwise to reduce the gap, and finally adjusting the print head guide rail and the print roller to be parallel. But pay attention to the right direction when adjusting. It can be adjusted gradually and printed several times.
Ten, print head movement is blocked, stop ringing or vibration in place.
This is mainly because the guide rail of the print head will dry when sliding for a long time, and the print head will get stuck when moving, which will stop printing to a certain extent. If it is not handled in time, it will burn out the driving circuit in serious cases. The solution is to drop a few drops of instrument oil on the printing guide rail and move the print head back and forth to make it evenly distributed. After restarting, if it is still stuck, it may be that the drive circuit is burnt out and needs to be taken to the maintenance department.
The most common fault of printer is paper jam. When this fault occurs, the indicator light on the operation panel will light up and send an alarm signal to the host. There are many reasons for this failure, such as sundries in the paper outlet path, rotation failure of parts such as the paper feed roller, failure of the paper tray to feed paper, sensor failure, etc. The way to solve this problem is simple, just open the cover and take out the jammed paper. However, it should be noted that the paper must be taken in the paper feeding direction, and any knob must not be turned in the opposite direction.
If there is frequent paper jam, it is necessary to check the paper feed channel and clear the sundries in the output path. The leading edge of the paper should be just above the metal plate. Check whether the exit roller is worn or the spring is loose. If the pressure is not enough, the paper can't be fed into the machine. When the paper discharge roller is worn and cannot be replaced for a while, emergency treatment can be carried out by winding rubber bands. After winding the rubber band, the paper friction increases, which can make the paper feed back to normal. In addition, improper installation of the paper box and poor paper quality (too thin, too thick and wet) can also cause paper jam or paper retrieval failure.