Duplex-unit-pickup delay jam
If the duplex-unit-pickup sensor (PS122) does not detect the leading edge of the paper within a
specific time period after the duplex feed motor (M107) starts driving, the microprocessor on the dc
controller PCA determines that a duplex-unit-pickup delay jam has occurred.
Duplex-unit stationary jam
If the duplex-unit-pickup sensor (PS122) does not detect the trailing edge of the paper within a
specific time period after the duplex-unit pickup operation starts, the microprocessor on the dc
controller PCA determines that a duplex-unit stationary jam has occurred.
Also, if the microprocessor on the dc controller PCA cannot communicate with the formatter while
paper is in the duplexing unit, it determines that a duplex-unit stationary jam has occurred.
Duplex-unit delay jam
If the duplex-unit-pickup sensor (PS122) does not detect the trailing edge of the paper within a
specific time period after the fuser-delivery sensor (PS108) detects the trailing edge, the
microprocessor on the dc controller PCA determines that a duplex-unit delay jam has occurred.
Pickup, feed, and delivery system 127
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