HP Color LaserJet 8500 Service Manual - Page 211

Table 40. Multi-bin mailbox sensors, switches, motors, controller board PCA Ref. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Control device Description M2 Flipper roller motor with encoder M1 Delivery head motor PSEject Delivery-rollers-extended sensor SW1 Interlock switch M3 Delivery head roller motor PSBinFull/Head Position Paper-bin-full sensor (below) PSBinEmpty Paper-bin-empty sensor PSExit2 Paper-delivered-to-bin sensor M5 Transport belt motor PSFaceUp Reverse-stepper-motor sensor PSFaceFull Left-output-bin-full sensor PSEntry Paper-entry sensor PSExit1 Paper-delivered-to-head sensor M4 Ejector motor Controller board PCA Receiving paper The printer delivers paper to the multi-bin mailbox through the face-up delivery slot (input paper guide) at a rate of 107 mm per second. Paper arrival is sensed by the PSEntry sensor, which activates the flipper roller motor (M2), causing the paper to move through the multibin mailbox transport and delivery system. Delivering paper The delivery head assembly on the multi-bin mailbox moves or stays in the indicated bin according to the commands coming from the EPH controller board on the printer. If paper is designated for the face-up bin, the multi-bin mailbox feeds it through the flipper assembly. If paper is designated for one of the face-down output bins, the multi-bin mailbox feeds it through the flipper assembly until the trailing edge is sensed by the PSFaceUp sensor. Then the flipper roller motor (M2) reverses and feeds the paper down between the transport belt and the metal tape until it reaches the delivery head assembly. EN Multi-bin mailbox 209