Jam detection The presence of media and paper-feed condition are detected by: top-of-page sensor (PS2305) delivery sensor (PS2301) reversed paper sensor (PS501) duplexer pickup paper sensor (PS503) A jam is detected by the CPU checking for the presence of media through sensors at the timing stored in the CPU. If the CPU determines a jam, it stops the print operation and notifies the formatter of a jam. Pickup sensors Pickup delay jam This printer performs retry control to readdress the pickup delay jam caused by pickup error. Pickup operation is conducted a maximum of twice at the all pickup sources except for the duplex feed unit.
If the top-of-page sensor (PS2305) cannot detect the media leading edge within a specified period of time (T) the printer performs the pickup operation again. If PS2305 cannot detect the media leading edge within the specified period of time (T), a jam is indicated. Paper pickup from the tray1: T=about 2.5 seconds Paper pickup from the cassette: T=about 3.0 seconds Paper pickup from the paper feeder: T=about 4.4 seconds Paper pickup from the duplexer feed unit: T=about 4.5 seconds Pickup stationary jam A. When WAIT period starts—a pickup stationary jam is assessed if the top-of-page sensor detects media when the WAIT period starts. B.
During media feeding—a pickup stationary jam is assessed if the top-of-page sensor (PS2305) does not detect the trailing edge of the media within 3.8 seconds after detecting the leading edge. Delivery sensors Delivery delay jam A delivery delay jam is assessed if the media does not reach the delivery sensor (PS2301) within a specified period of time (T) after the top-of-page sensor (PS2305) detects the leading edge. paper 270 mm or more: T=about 2.6 seconds paper 200 mm to 270 mm: T=about 2.7 seconds paper less than 200 mm: T=about 4.6 seconds Delivery stationary jam A.
When WAIT period starts—a delivery stationary jam is assessed if the delivery sensor (PS2301) detects media when the WAIT period starts. C7058-90936 Jam detection 91