HP 8550 Service Manual - Page 283

Table 74. Jam detection (continued) Function Jam Type Sensor Description Code Delivery Upper cover MS2, S4 The upper cover is open while the ADF is in operation. 82H open Delivery Jam original S1 Sensor S1 does not detect the original delivered on the 83H document tray. Delivery Recirculating S6, S3, S8, At the start of original pick-up, sensor S6, S3, or S8 84H lever idle S7 (also S7 if the paper stopper plate is up) is on. rotation (second circulation or latter) Delivery Residual S8 original When picking up for the first original is detected on the 88H copyboard glass. Double Double S14 Feeding feeding For the second circulation or later, the recirculation 89H lever rotates idly without coming into contact with an original. Delivery Delivery failure S3,S6 At time of delivery in bottom separation pick-up mode. 84H the original fails to stop (for example, the original that has been picked up is longer than the original being delivered). Delivery ADF open MS1 While the copy module is at rest (because, for 91H example, the absence of paper) the ADF is open. Delivery Upper cover MS2, S4 opened While the copy module is at rest (because, for example, the absence of paper) the upper cover is opened Delivery Recirculating S13 lever idle rotation At time of original pick-up, the recirculating lever fell off 93H a stack of original. Note The ADF operation stops immediately upon detection of a jam. Note For a pick-up delay jam, reset the ADF by removing the original from the document tray. For other types of jams, remove the originals from the document tray, remove the jam from the ADF, and open the ADF. EN ADF 281