Laser printer come out a blank sheet of paper

Our printers may sometimes print out blank paper. Now let’s take laser printers as an example to talk about the reasons and solutions for printers printing blank paper.

Possible causes of the fault:

1. There is no toner in the cartridge

2. The laser mechanical shutter is not open

3. The laser beam detector is contaminated or damaged

4. The laser is damaged

Inspection locations and repair methods:

1) Replace a new toner cartridge to see if the fault disappears

When replacing the toner cartridge, first you pull out the seal and check whether the toner has been used up. If the seal is not pulled out or the toner has been used up, there will be no image.

If the toner in the cartridge is used up, the output sample will first gradually fade in the middle of the vertical direction. For printers with a toner usage indicator light, the indicator light will flash continuously, indicating that the toner is about to run out. Then the area where the image fades expands, and finally the image on the entire sheet is not clear. The phenomenon of the entire sheet being blank is very rare, and it takes a long time after the image fades. Therefore, the problem of the entire sheet being blank can basically rule out the cause of no toner in the toner cartridge.

2) Check whether the laser mechanical shutter is open

To prevent laser leakage, there is a mechanical shutter in the scanning assembly. When the toner cartridge is installed in the printer, the mechanical shutter is pushed open, and the laser beam can be projected onto the scanning mirror, which then exposes the photosensitive drum. If the mechanical shutter lever is damaged or the toner cartridge impact rod is damaged, the shutter cannot be opened, the photosensitive drum cannot obtain exposure information, and the output sample will be a blank sheet of paper.

The general troubleshooting method for this problem is to use glue to repair the shutter lever or the impact rod on the toner cartridge assembly.

3) Check whether the laser beam detector is contaminated or damaged

The laser beam detector is inside the toner cartridge assembly and is a device that detects the start and end of the laser beam scanning cycle. When the detector cannot detect laser information due to contamination, angle deviation or damage, there is no signal feedback to the DC processor, and the scanning drive circuit stops working, thereby outputting blank paper.

The troubleshooting method is to clean the laser beam detector lens or calibrate the laser beam detector angle. If it cannot be eliminated, the laser beam detector should be replaced.

4) If you didn’t find problems after the above inspections and the fault persists, check whether the laser itself is damaged or there is a fault in the laser drive circuit. This requires checking and replacing the scanning components or repairing the drive circuit.

Summary:

The above is the cause of the laser printer come out blank paper, and the troubleshooting method. Welcome to leave a message in the comment area and let’s discuss it together.