HP LaserJet M9040/M9050 Service Manual - Page 159
Jam detection, The product can detect the following jams, Pickup and feed system
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Jam detection The product can detect the following jams: Table 5-14 Jam detection Jam Causes and conditions Pickup 1 delay jam Pickup 2 delay jam Media fails to reach Tray 2 feed sensor A (PS1402) or Tray 3 feed sensor A (PS1404) within 3.2 seconds after pickup begins. ● Media fails to reach Tray 2 feed sensor B (PS1401) or Tray 3 feed sensor B (PS1403) within 3.0 seconds after Tray 2 feed sensor A (PS1402) or Tray 3 feed sensor A (PS1404) detects the leading edge. ● Media fails to reach the registration paper sensor (PS2) within 4.0 seconds after Tray 2 feed sensor B (PS1401) detects the leading edge of the media or within 4.5 seconds after Tray 3 feed sensor B (PS1403) detects the leading edge. Fuser delivery 1 delay jam The leading edge fails to reach the fuser delivery sensor (PS502) within 1.4 seconds after the / VSYNC signal. Fuser delivery 2 delay jam The leading edge fails to reach the fuser jam sensor (PS501) within 1.6 seconds after the /VSYNC signal. Fuser delivery stationary jam The trailing edge fails to clear the fuser delivery sensor (PS502) within the specified time (3.4 seconds for A3 media or 2.5 seconds for A4 media) after the /VSYNC signal. Face-down delivery delay The leading edge fails to reach the face-down bin delivery sensor (PS1451) within 2.4 seconds jam after the /VSYNC signal. Face-down delivery stationary jam The leading edge fails to clear the face-down bin delivery sensor (PS1451) within the specified time (4.3 seconds for A3 media or 3.4 seconds for A4 media) after the /VSYNC signal. Door open jam The following sensors detect media in the system when the door is opened or closed: ● Registration paper sensor (PS2) ● Fuser delivery sensor (PS501) ● Fuser jam sensor (PS502) ● Face-down bin delivery sensor (PS1451) ● Tray 2 feed sensor A (PS1401) ● Tray 2 feed sensor B (PS1401) ● Tray 3 feed sensor A (PS1404) ● Tray 3 feed sensor B (PS1403) Residual jam The following conditions indicate a residual jam: ● The product is turned on, and the fuser delivery sensor (PS502) and the fuser jam sensor (PS501) have detected media during the startup process. ● The DC controller has not received an automatic delivery command three minutes after a jam that should include the command was cleared. ● At least one of the following sensors detects media after a jam was cleared, the jammed media was delivered, the product is turned on, and the fuser is at target temperature: ◦ Registration paper sensor (PS2) ◦ Fuser delivery sensor (PS501) ◦ Fuser jam sensor (PS502) ENWW Pickup and feed system 141