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With the continuous decline of computer hardware prices, computers and peripherals (such as printers, scanners, etc.) have been widely used in offices and homes. Among all peripherals, printers have a higher failure rate. In fact, printers appear There are many non-hardware reasons for this problem, and even non-professionals can solve this problem. Let me talk about some of the simpler problems I have encountered in the process of printer maintenance:
1. The printed characters are missing or incomplete, and the characters are not clear.
Reason analysis: For inkjet printers, there may be two reasons: 1. The ink cartridge is out of ink; 2. The printer is not used for a long time or is exposed to direct sunlight, and the nozzle is blocked. For the dot matrix printer, it may be the following reasons: 1. It takes too long to print the ribbon; 2. The print head has not been cleaned for a long time, too much dirt; 3. The print head has broken needles; 4. The print head drive circuit is defective.
Solution: For inkjet printers, you can replace the ink cartridge or refill the ink. If the ink cartridge is not used up, you can conclude that the nozzle is blocked: remove the ink cartridge (for printers with non-integrated ink cartridge nozzles, you need to remove the nozzle, but be careful), Immerse the nozzle in warm water for a while, taking care not to submerge the circuit board in the water, otherwise the consequences will be unimaginable. For needle printers, you can adjust the distance between the print head and the print roller. If it doesn't work, you can change the ribbon. If it still doesn't work, you need to clean the print head. The method is: remove the two fixing screws on the print head, take off the print head, use a pin or a small hook to remove the dirt on the front and back of the print head, generally the ribbon fiber accumulated for a long time, etc., and then print Drop a few drops of instrument oil where the needle can be seen at the back of the head to remove some dirt. Do not install the ribbon and hit a few sheets of paper, then install the ribbon, so that the problem can basically be solved. If the print head is broken If you have a problem with the needle or the drive circuit, you can only get it to the maintenance department.
2. When printing, there is a black war of uneven thickness on the printing paper.
Analysis of the reason: This phenomenon generally occurs on needle printers because the print head is too dirty or the distance between the print head and the print roller is too small or the printing paper is too thick.
Solution: Remove the print head, clean the print head, or adjust the distance between the print head and the print roller.
3. When printing, one hand is clear and the other is not clear.
Analysis of the reason: This phenomenon generally occurs on needle printers, inkjet printers may also appear, but the probability is small, mainly because the print head guide and the print roller are not parallel, resulting in the distance between the two.
Solution: The distance between the print head guide and the printing roller can be adjusted to be parallel. The specific method is: loosen the adjustment pieces on both sides of the print head guide rail, turn the adjustment pieces counterclockwise to reduce the gap, and clockwise to increase the gap, and finally adjust the print head guide rail and the print roller parallel to solve the problem. Pay attention to adjust the direction when adjusting, you can gradually adjust, print more times.
4. When printing, the print head feels resisted. After printing, it stops and makes a long beep or vibrates in the same place.
Reason analysis: The print head guide rail will become dry for a long time, the print head will be blocked when moving, to a certain extent, it will stop printing, and the drive circuit can be burned out in severe cases.
Solution: Apply a few drops of instrument oil to the printing guide and move the print head back and forth to make it even. Restart, if there is still a blocking phenomenon, it may be that the drive circuit is burned out and you need to get it to the maintenance department.
5. There is no response after the printer is turned on, and there is no power at all.
Analysis of reasons; printers have over-current protection devices, when the current is too large, it will play the role of current protection. This phenomenon is basically caused by the burnout of the printer fuse.
Solution: Open the case, find the fuse in the internal power supply part of the printer (the internal power supply part can be found near the external power supply of the printer), see if it is black, or use a multimeter to measure whether it is burnt out. The corresponding fuse is enough (the fuse is marked with rated current).
1. The printed characters are missing or incomplete, and the characters are not clear.
Reason analysis: For inkjet printers, there may be two reasons: 1. The ink cartridge is out of ink; 2. The printer is not used for a long time or is exposed to direct sunlight, and the nozzle is blocked. For the dot matrix printer, it may be the following reasons: 1. It takes too long to print the ribbon; 2. The print head has not been cleaned for a long time, too much dirt; 3. The print head has broken needles; 4. The print head drive circuit is defective.
Solution: For inkjet printers, you can replace the ink cartridge or refill the ink. If the ink cartridge is not used up, you can conclude that the nozzle is blocked: remove the ink cartridge (for printers with non-integrated ink cartridge nozzles, you need to remove the nozzle, but be careful), Immerse the nozzle in warm water for a while, taking care not to submerge the circuit board in the water, otherwise the consequences will be unimaginable. For needle printers, you can adjust the distance between the print head and the print roller. If it doesn't work, you can change the ribbon. If it still doesn't work, you need to clean the print head. The method is: remove the two fixing screws on the print head, take off the print head, use a pin or a small hook to remove the dirt on the front and back of the print head, generally the ribbon fiber accumulated for a long time, etc., and then print Drop a few drops of instrument oil where the needle can be seen at the back of the head to remove some dirt. Do not install the ribbon and hit a few sheets of paper, then install the ribbon, so that the problem can basically be solved. If the print head is broken If you have a problem with the needle or the drive circuit, you can only get it to the maintenance department.
2. When printing, there is a black war of uneven thickness on the printing paper.
Analysis of the reason: This phenomenon generally occurs on needle printers because the print head is too dirty or the distance between the print head and the print roller is too small or the printing paper is too thick.
Solution: Remove the print head, clean the print head, or adjust the distance between the print head and the print roller.
3. When printing, one hand is clear and the other is not clear.
Analysis of the reason: This phenomenon generally occurs on needle printers, inkjet printers may also appear, but the probability is small, mainly because the print head guide and the print roller are not parallel, resulting in the distance between the two.
Solution: The distance between the print head guide and the printing roller can be adjusted to be parallel. The specific method is: loosen the adjustment pieces on both sides of the print head guide rail, turn the adjustment pieces counterclockwise to reduce the gap, and clockwise to increase the gap, and finally adjust the print head guide rail and the print roller parallel to solve the problem. Pay attention to adjust the direction when adjusting, you can gradually adjust, print more times.
4. When printing, the print head feels resisted. After printing, it stops and makes a long beep or vibrates in the same place.
Reason analysis: The print head guide rail will become dry for a long time, the print head will be blocked when moving, to a certain extent, it will stop printing, and the drive circuit can be burned out in severe cases.
Solution: Apply a few drops of instrument oil to the printing guide and move the print head back and forth to make it even. Restart, if there is still a blocking phenomenon, it may be that the drive circuit is burned out and you need to get it to the maintenance department.
5. There is no response after the printer is turned on, and there is no power at all.
Analysis of reasons; printers have over-current protection devices, when the current is too large, it will play the role of current protection. This phenomenon is basically caused by the burnout of the printer fuse.
Solution: Open the case, find the fuse in the internal power supply part of the printer (the internal power supply part can be found near the external power supply of the printer), see if it is black, or use a multimeter to measure whether it is burnt out. The corresponding fuse is enough (the fuse is marked with rated current).
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