Tray 1 Will Not Lift; Tray 2, 3 Or 4 Will Not Lift - Xerox Phaser 7700 Service Manual

Tray 1 will not lift

In order for Tray 1 to lift, the +24VDC interlock circuit through the LH, RH and
Front Doors must be complete, one or both of the top two Paper Size Switches
must be closed, and the Tray Level Sensor must be deactuated.
1. Determine if the Feed/Lift Motor operates normally, if the motor operates but
does 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. If
the printer has an Auxiliary feeder, then swap the Universal Tray with another
and retest.
3. If the Feed Lift Motor operates but does not sound normal, check the drive
coupling for damage. If the printer has an Auxiliary feeder, then swap the one
from another tray and retest. Also swap the Feeder Assembly with one from
another tray and retest.
4. If the Feed/Lift Motor does not operate and another is available, swap the
Feeder 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 lift

In order for a paper tray to lift, the 24VDC interlock circuit through the LH Door
of the Auxiliary Feeder must be complete, one or both of the top two Paper Size
Switches must be closed, and the Tray Level Sensor must be deactuated.
1. Determine if the Feed/Lift Motor operates normally, if the motor operates but
does 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 it
is 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 drive
coupling for damage. If it is a Universal Tray swap the tray with another and
retest. 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 the
Feed/Lift Motor with one from another tray and retest. 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).
3-94 Phaser 7700 Color Laser Printer