HP LaserJet 4250 Service Manual - Page 166
Stapler/stacker jam detection, Stapler/stacker feed jam, Stapler/stacker feed stationary jam
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Stapler/stacker jam detection The following sensors detect the presence of media in the stapler/stacker and determine whether the media is feeding correctly or jamming. For information about the location of these sensors, see Stacker and stapler/stacker switches and sensors. ■ Paper-inlet sensor (PS1101) ■ Paper-delivery sensor (PS102) Stapler/stacker feed jam If the paper-inlet sensor (PS1101) does not detect the leading edge of the media within a specified period of time after the stacker driver has received the paper-delivery signal, the dc controller PCA determines that a stapler/stacker feed-delay 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 and Numerical printer messages. Stapler/stacker feed stationary jam If the paper-inlet sensor (PS1101) does not detect the trailing edge of the media within a specified period of time after the paper inlet-sensor (PS1101) detected the leading edge of the media, the dc controller PCA determines that a stapler/stacker feed-delay 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 and Numerical printer messages. Stapler/stacker delivery jam If the paper-delivery sensor (PS1102) does not detect the trailing edge of the media within a specified period of time after the feed motor has been activated following the completion of the stapling operation, the dc controller PCA determines that a stapler/stacker feed-delay 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 and Numerical printer messages. Stapler/stacker residual media jam If the paper-inlet sensor (PS1101) or the paper-delivery sensor (PS1102) detects media during the initial drive period, the dc controller PCA determines that a stapler/stacker-feed delay 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 and Numerical printer messages. NOTE This jam message only appears if the paper-delivery sensor (PS1102) detects media at the start of the initial drive. 152 5 Theory of operation