HP LaserJet M9040/M9050 Service Manual - Page 411

● The customer might be fanning media before loading it into the tray. ● The customer might be adding media in small amounts. Do not add small amounts of media or mix types of media in the tray. ● The product or media storage environment might be too humid or too dry. Isolate a media brand If the product jams with only one brand of media, try the following: ● Switch brands. ● If the media ream appears to be old, open a fresh ream of the same type, and load it correctly into the product. If the problem disappears, investigate storage and handling conditions. Isolate a media type When jams and other problems occur frequently, it is often because the customer is using a special media. Customers must only use media that conforms to all Hewlett-Packard specifications, and should always test media before purchasing large quantities. Media should be tested before storage to verify quality printing results. Then, if problems occur, storage or handling conditions can isolate the most likely cause. ● Adhesive labels ● Envelopes ● Transparencies ● Preprinted forms and letterhead ● Embossed media ● Perforated media ● Chemically treated media ● Synthetic media ● Coated media ● Other special media See "Media specifications" in chapter 2 for further information concerning these types of media. ENWW Media troubleshooting 393