Common Faults and Solutions for Three Types of Printers

Common printers are dot matrix printers, inkjet printers, and laser printers. The laser printer we will next introduce, for example, the LaserJet Pro M402dn printer, which uses hp cf226a toner cartridges. Of course, the hp cf226x toner is also available for the HP LaserJet Pro M402dn printer.

Fault description: printing characters are incomplete or characters are not clear

Dot matrix printer
In the following cases, the printed characters may be incomplete or the characters are not clear. First, the printing ribbons are used for too long. Secondly, the printing heads are not cleaned for a long time, too much dirt; the print head has broken needles; finally, the print head drive the circuit is faulty. How to solve it? We first adjust the distance between the print head and the print roller. If the fault cannot be eliminated, the ribbon can be replaced. If the situation is not improved after the replacement, the print head needs to be cleaned. The method is: remove the two fixing screws on the print head, take off the print head, use a needle 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, and then print The back of the head can see a few drops of instrument oil in the place where the needle is seen, in order to remove some dirt, do not put a few sheets of paper in the ribbon, and then install the ribbon, so that the problem can be basically solved, if it is a print head break Needle or drive circuit problem, you can only replace the print pin or drive tube.
Inkjet Printers
There are two reasons for this failure. One is that the ink cartridge is exhausted, and the other is that the printer is not used for a long time or is exposed to direct sunlight, causing the nozzle to clog. The solution is to replace the ink cartridge or inject ink. If the ink cartridge is not used up, you can conclude that the nozzle is clogged. At this time, remove the ink cartridge. If the ink cartridge nozzle is not an integrated printer, you need to remove the nozzle and soak the nozzle in warm water for a while. Be careful not to immerse the board in the water, otherwise the consequences will be unimaginable.
The LaserJet Pro M402dn printer may be related to its consumables hp cf226a toner cartridges, the exact reason is not clear. If there is a user who knows the solution, please leave a message in the comment area.