HP 4700n Service Manual - Page 429
Data collection, General paper path troubleshooting, DIAGNOSTICS
UPC - 829160845630
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Data collection To troubleshoot jams, gather the following information: ● The exact jam error code that displays on the control panel ● The location of the leading edge of the media that is in the paper path ● Whether media is in the paper path when the jam occurs or in the input tray ● Whether the jam occurs at power-up or while media is moving ● Whether the media is damaged and, if it is, where the damage occurs on the paper and where in the paper path the sheet stops ● Whether the jam occurs when feeding from one particular tray ● Whether the jam occurs only when using duplex printing ● Whether a particular type of media is jamming or not jamming ● Whether any of the supplies are non-HP (non-HP supplies are known to cause jams) ● Whether the customer is storing the media correctly, overloading the trays, damaging the edge of the media during loading, or using media that has already been fed through the printer General paper path troubleshooting Use the following suggestions to isolate the cause of the problem. After you have identified the cause, use the tables in this section to find a recommended solution. NOTE Use the paper path test in the DIAGNOSTICS menu to print pages while troubleshooting. ● View or print the event log and determine if a particular jam error occurs more often than others. Try to identify a pattern. ● Use the event log to determine the frequency of a particular jam. If a jam occurs repeatedly at approximately the same page count, consider it a single jam that the customer tried to clear. ● Try printing from all available input trays to identify whether the problem is isolated to one tray. ● Print the job in both simplex and duplex modes to identify whether the problem occurs only in one mode or the other. ● Try printing on media from an unopened ream that has been stored correctly. If the jam does not occur with this media, then the customer's media might be causing the problem. ● If the jam occurs from when the printer is turned on, check the paper path for small, torn pieces of media. Also check for broken sensors or flags, and check for loose or defective connections. ● If the media is torn, folded, or wrinkled (typically along the leading edge), inspect the paper path for items that could be causing the damage. ENWW Paper path troubleshooting 409