3-94 Phaser 7700 Color Laser PrinterTray 1 will not liftIn order for Tray 1 to lift, the +24VDC interlock circuit through the LH, RH andFront Doors must be complete, one or both of the top two Paper Size Switchesmust be closed, and the Tray Level Sensor must be deactuated.1. Determine if the Feed/Lift Motor operates normally, if the motor operates butdoes not sound right, or if the motor does not operate at all.2. If the Feed/Lift Motor operates normally, check the paper tray for damage. Ifthe printer has an Auxiliary feeder, then swap the Universal Tray with anotherand retest.3. If the Feed Lift Motor operates but does not sound normal, check the drivecoupling for damage. If the printer has an Auxiliary feeder, then swap the onefrom another tray and retest. Also swap the Feeder Assembly with one fromanother tray and retest.4. If the Feed/Lift Motor does not operate and another is available, swap theFeeder Assembly and retest.5. Inspect the wiring harness for damage and continuity.6. Replace the Auxiliary Feeder Control Board (RRP 60, on page 7-210).7. Replace the Engine Control Board (RRP 42, on page 7-190).Tray 2, 3 OR 4 will not liftIn order for a paper tray to lift, the 24VDC interlock circuit through the LH Doorof the Auxiliary Feeder must be complete, one or both of the top two Paper SizeSwitches must be closed, and the Tray Level Sensor must be deactuated.1. Determine if the Feed/Lift Motor operates normally, if the motor operates butdoes not sound right, or if the motor does not operate.2. If the Feed/Lift Motor operates normally, check the paper tray for damage. If itis a Universal Tray then swap the tray with one of the others and retest.3. Ensure that all packaging material has been removed.4. If the Feed Lift Motor operates but does not sound normal, check the drivecoupling for damage. If it is a Universal Tray swap the tray with another andretest. Also swap the Feeder Assembly with one from another tray and retest.For HCF Tray 3 and 4 carefully inspect the gear drive mechanism for damage.Swap the Feed/Lift Motor with one from another tray.5. If the Feed/Lift Motor does not operate swap the Feeder Assembly or theFeed/Lift Motor with one from another tray and retest. Inspect the wiringharness for damage and continuity.6. Replace the Auxiliary Feeder Control Board (RRP 60, on page 7-210).7. Replace the Engine Control Board (RRP 42, on page 7-190).
