Table 2-34
Image defect examples (continued)
Problem
Image example
Solution
Gray background (image
is obviously dark)
1.
Do not use paper that has already been run through the product.
2.
Try using a different type of paper.
3.
Print a few more pages to see if the problem corrects itself.
4.
Turn over the paper in the tray. Also, try rotating the paper 180°.
5.
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.
6.
Make sure that the environmental specifications for the product are being met.
7.
The toner cartridge might need to be replaced.
8.
The print-cartridge ground or bias contacts might be dirty. Clean the contacts.
9.
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.
10.
The high-voltage power supply might be damaged. Replace the high-voltage
power supply.
Toner smear
1.
Print a few more pages to see if the problem corrects itself.
2.
Try using a different type of paper.
3.
Make sure that the environmental specifications for the product are being met.
4.
Clean the inside of the product and run a cleaning page to clean the fuser.
5.
The toner cartridge might need to be replaced.
Loose toner
Loose toner, in this context, is defined as toner that can be rubbed off the page.
1.
If you have observed a rougher texture on one side of your paper, try printing
on the smoother side.
2.
Make sure that the environmental specifications for the product are being met.
3.
Make sure that the type and quality of the paper you are using meet
HP specifications. For more information, see the product user guide.
4.
The pressure roller is dirty, the fuser film is scratched, or a foreign substance is
on the fuser film. Use the
Fuser Test Page
option in the
Troubleshooting
menu
to test the fuser. If the error persists, replace the fuser.
ENWW
Solve image-quality problems
435
Summary of Contents for LASERJET ENTERPRISE MFP M725dn
Page 1: ...LASERJET ENTERPRISE MFP M725 Troubleshooting Manual M725z M725dn M725f M725z ...
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Page 3: ...HP LaserJet Enterprise MFP M725 Troubleshooting Manual ...
Page 6: ...iv Conventions used in this guide ENWW ...
Page 32: ...xxx ENWW ...
Page 142: ...110 Chapter 1 Theory of operation ENWW ...
Page 457: ...4 Close the fuser jam access cover 5 Close the fuser door ENWW Clear jams 425 ...
Page 475: ...1 Lift the document feeder latch 2 Open the document feeder cover ENWW Clean the product 443 ...
Page 516: ...484 Appendix A Service and support ENWW ...
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