1. Reasons for paper jam in HP printer:
1: Pickup wheel: unable to feed paper.
2. It is stuck under the selenium drum, which may be a laser or a fixing component. The fixing film inside is broken and needs to be replaced.
3. It is stuck in the paper outlet. Obviously, the fixing film is broken and needs to be replaced.
4. There is also a case of printing for a long time, which is caused by too much dust at the paper inlet. This can be properly passed by sticking paper once. For example, double-sided tape must be restored before use.
Second, the HP printer fault solution is introduced
1, printing paper output turns 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.
2. The movement of the print head is blocked, the ringing stops or the vibration does not reach the designated position.
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.
3. Repeated stains on printed paper
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.