HP LaserJet M9040/M9050 Service Manual - Page 402

Table 7-13 Image defects (continued) Problem Cause Solution Blank spots The media does not meet product specifications or is stored incorrectly. ● Print a few more pages to see if the problem corrects itself. ● Turn over the stack of media in the tray. Also try rotating the media 180°. Wrinkles or creases The transfer charging roller is contaminated or deformed. The print cartridge is defective. The media fails to meet product specifications or is stored improperly. If the media does not meet HP specifications, replace the media. ● Replace the transfer charging roller. ● Replace the print cartridge. ● 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 media is loaded incorrectly Load the media correctly, and be sure the guides are set correctly. The product is drawing media from the Use a different tray. Tray 1 is meant for wrong tray. a wide range of media types. The product is sending the media to the Set the product to use a different bin wrong bin. (face up or face down). The paper path is obstructed. Check the paper path for debris. Check the paper path for damaged components. The fuse levers are in an incorrect position. Set the levers in the down position for all media other than envelopes. Set the levers in the up position for envelopes only. 384 Chapter 7 Solve problems ENWW