HP LaserJet 4250 Service Manual - Page 137
Printer pickup delay jam from tray 1, Printer pickup stationary jam
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Printer pickup delay jam from tray 1 If the top-of-page sensor (PS103) does not detect the leading edge of the media within a specific period of time after the media is picked up, the microprocessor on the dc controller PCA determines that a pickup jam has occurred. NOTE The printer attempts to pick up the media several times before determining that a pickup jam exists. The number of pickup attempts depends on the source (for example, four attempts occur if tray 1 is the source). The transport process stops and a 13.XX.YY JAM message appears on the control-panel display. For more information about jam messages, see Alphabetical printer messages or Numerical printer messages. Printer pickup delay jam from tray 2 If the pre-feed sensor (PS102) does not detect the leading edge of the media within a specific period of time after the media is picked up, the microprocessor on the dc controller PCA determines that a pickup jam has occurred. NOTE The printer attempts to pick up the media several times before determining that a pickup jam exists. The number of pickup attempts depends on the source (for example, four attempts occur if tray 1 is the source). The transport process stops and a 13.XX.YY JAM message appears on the control-panel display. For more information about jam messages, see Alphabetical printer messages or Numerical printer messages. Printer pickup stationary jam If the top-of-page sensor (PS103) does not detect the trailing edge of the media within a specific period of time after the media is picked up, the microprocessor on the dc controller PCA determines that a pickup jam has occurred. The transport process stops and a 13.XX.YY JAM message appears on the control-panel display. For more information about jam messages, see Alphabetical printer messages or Numerical printer messages. Printer-delivery wrap jam when feeding regular media NOTE Regular-size media is defined as A4, Letter, Legal, B5, Executive or A5. If the fuser delivery sensor (PS108) does not detect the trailing edge of the media after a specified fusing time, the microprocessor on the dc controller PCA determines that a printer delivery-wrap jam has occurred. The transport process stops and a 13.XX.YY JAM message appears on the control-panel display. For more information about jam messages, see Alphabetical printer messages or Numerical printer messages. Printer delivery wrap-jam when feeding irregular media NOTE Irregular media is defined as media that is less than 200 mm (7.9 inches) in length. Paper-pickup-and-feed system 123