Service Quick Reference Guide - Troubleshooting 3-95Tray 2, 3 AND 4 will not lift orPrinter will not recognize the Auxiliary FeederThere are two circuits connecting the printer to the auxiliary feeder: the powercircuit and the serial data link.1. Check that the auxiliary feeder is properly connected to the back of the printer.2. From the Front Panel check to see if the auxiliary feeder is recognized by theprinter.3. Remove the rear panel of the auxiliary feeder. Check for presence of +5VDC,+24VDC and +3.3VDC at the auxiliary feeder control board P555-2, -4 and -6.Check for continuity of the DC return lines.4. Check the continuity of the serial data link circuit by verifying continuitybetween Engine Control Board P407B-9, -10, -11, -12, -13 and –14, and theauxiliary feeder Board P541-1, -2, -3, -4, -5 and –6.5. Replace the Auxiliary Feeder Control Board (RRP 60, on page 7-210).6. Replace the Engine Control Board (RRP 42, on page 7-190).Printer will not recognize the FinisherThe Finisher is connected to the printer by a complementary pair serial data link.The Finisher also generates its own +5VDC from +24VDC supplied by the printer.1. Check that the Finisher is properly connected to the printer.2. From the Front Panel check to see if the Finisher is recognized by the printer.3. Remove the Rear Cover and Board Cover from the Finisher4. Check for presence of +24VDC between the Finisher Board P844-2 and Finisherframe ground.5. Turn off power and check the continuity of the serial data link circuit byverifying continuity between P531B-9 through –16 on the Engine ControlBoard, and P843-1 through –8 on the Finisher Board.6. Replace the Finisher Board (RRP 77, on page 11-316).7. Replace the Engine Control Board (RRP 42, on page 7-190).
