HP LaserJet Enterprise 700 M712 series Handbuch Zur Fehlerbehebung Seite 310

Table 2-52 Image defect examples (continued)
Problem
Gray background (image
is obviously dark)
Toner smear
Loose toner
284 Chapter 2 Solve problems
Image example Solution
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Loose toner, in this context, is defined as toner that can be rubbed off the page.
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Do not use paper that has already been run through the product.
Try using a different type of paper.
Print a few more pages to see if the problem corrects itself.
Turn over the paper in the tray. Also, try rotating the paper 180°.
Open the Administration menu at the product control panel. Open the
General Settings menu and then open the Print Quality menu. Increase
the Toner density setting.
Make sure that the environmental specifications for the product are being met.
The toner cartridge might need to be replaced.
The print-cartridge ground or bias contacts might be dirty. Clean the contacts.
Stop a print job before it is complete, and then remove the toner cartridge.
Open the photosensitive drum shield, and look at the toner image on the
drum.
If the image is not fully transferring to the page, replace the transfer
◦
roller.
If the toner on the drum is faint, replace the laser scanner.
◦
The high-voltage power supply might be damaged. Replace the high-voltage
power supply.
Print a few more pages to see if the problem corrects itself.
Try using a different type of paper.
Make sure that the environmental specifications for the product are being met.
Clean the inside of the product and run a cleaning page to clean the fuser.
The toner cartridge might need to be replaced.
If you have observed a rougher texture on one side of your paper, try printing
on the smoother side.
Make sure that the environmental specifications for the product are being met.
Make sure that the type and quality of the paper you are using meet
HP specifications. For more information, see the product user guide.
The pressure roller is dirty, the fuser film is scratched, or a foreign substance is
on the fuser film. Use the Print Fuser Test Page option in the
Troubleshooting menu to test the fuser. If the error persists, replace the
fuser.
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