HP LaserJet M9040/M9050 Service Manual - Page 403
Image-formation troubleshooting
View all HP LaserJet M9040/M9050 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 403 highlights
Table 7-13 Image defects (continued) Problem Cause Solution Curl or wave The media fails to meet product specifications or is stored improperly. ● Print a few more pages to see if the problem persists. ● Turn the stack over in the tray, or rotate the stack 180°. ● Use media that meets product specifications. The operating environment fails to meet Place the product in an environment that product specifications. meets product specifications. The product is sending the media to the Set the product to use a different bin wrong bin. (face up or face down). Contamination on back The fuser is configured with the wrong setting Change the fuser mode setting in the control panel Print Quality menu, or select another media type in the print driver. Parts of the product are contaminated. ● For example: tray separation roller, feed roller, transfer charging roller, fuser, or print cartridge. ● Print about 10 pages to see if the problem goes away. Print a cleaning page. ● Identify and clean the contaminated part. ● Check for toner leaks. The media fails to meet product specifications or is stored improperly. Print a few more pages to see if the problem persists. Turn the stack over in the tray, or rotate the stack 180° Use media that meets product specifications. The product requires a preventative maintenance kit. If the product has printed about 350,000 pages, install a preventative maintenance kit. Dropouts The media is too smooth. Check the media type and quality. The operating environment fails to meet Place the product in an environment that product specifications. meets product specifications. The toner density setting is incorrect. Adjust the toner density setting in the control panel Print Quality menu (turn off Economode). The fuser is configured with the wrong setting Change the fuser mode setting in the control panel Print Quality menu, or select another media type in the print driver. The product requires a preventative maintenance kit. If the product has printed about 350,000 pages, install a preventative maintenance kit. Bubbles The drum ground path is missing. Check the drum ground spring, and reconnect it. Replace the high voltage power supply. ENWW Image-formation troubleshooting 385