HP 3390 Service Manual - Page 199
Jams, Causes of jams, Tips to avoid jams, the all-in-one during a print job.
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Jams Causes of jams NOTE If you are experiencing jams in the duplex paper path, make sure that the duplex-tray lever is set to the correct media size for your country/region. Open the duplex-paper-path door and look at the embossed arrow on the lever. Make sure that it points to the media size for your country/region. If the size needs to be changed, push the lever all the way in for duplex printing on letter- and legal-size media, or pull it all the way out for duplex printing on A4-size media. LTR, A4 LGL LTR, A4 LGL Occasionally, paper or other print media can become jammed during a print job. Some causes include the following events: ● The print media that is being used does not meet HP specifications. ● The media is damaged or has objects attached to it, such as staples or paper clips. ● The environment in which the print media was stored is too humid or too dry. ● The input trays are loaded incorrectly or overfilled, or the media guides are not set correctly. ● Too many sheets have accumulated in an output area, or sheets are blocking an output area. ● Media is added to or removed from an input tray during a print job or an input tray is removed from the all-in-one during a print job. ● The cartridge door is opened during a print job. Tips to avoid jams ● Use only HP-recommended media types and sizes. ● Verify that the input tray is not overfilled. The input tray capacity varies depending on the type of print media that you are using. ● Verify that the media guides are correctly adjusted. ENWW Jams 177