Why the laser printer has a heavy shadow

Printer ghosting phenomena and causes

Printer ghosting phenomenon generally appears on the laser printer, the text in the printed document will be repeated at intervals after a period of time (may be lighter than the original), according to the laser printer imaging process, printer ghosting problems generally appear in the transfer link and fixing link

Solutions to the ghosting of laser printers

1. Transfer Printing link

The transfer printing in a laser printer refers to the process of forming the carbon number of electrostatic potential on the drum core from the drum core to the paper under the transfer printing pressure. If the transfer fails (for example, the transfer voltage is not correct), can lead to toner can not be completely transferred to the paper, with the drum core rotation, the next cycle of the same part of the electrostatic image of the part of the picture transferred to the paper, which caused the laser printer ghosting phenomenon.

Workaround:

① Clean toner and use special toner (if you use the wrong toner, due to the power of the toner, resulting in a printer ghosting) ② the paper type (when the paper is thick paper or film, the transfer voltage will be higher than ordinary paper)

③ Check the transfer roller ends are good, transfer is normal.

2, fixing link

Fixing refers to the carbon powder on the paper is pressed into the paper fiber at high temperature, so that the carbon powder very paper together, will not fall off, if the toner adhesion on the fuser, with the rotation of the fuser, will be printed on the paper on the periodic ghosting, also caused by the problem of the printer ghosting we said.

Solving method

① Toner Melting point is too low easy to stick on hot rollers, clean toner and use special toner

② fuser Hot Roller material is not good, or aging and so on, replace the quality of the Fuser hot roll

Laser Printer ghosting Repair Summary

The above is the laser printer ghosting maintenance judgment process, looks very simple, but if for the laser printer working principle and process do not understand, then the simple problem is also difficult to fix, let alone is the laser printer ghosting problem, so to properly repair a printer, first understand the principle of the printer is necessary.