Normally its the maintenance tray clutch slipping.
Or the maintenance tray ends are worn.
You can remove the left cover and clean the clutch, its on the lower part of the frame, and take your kit out and there are 2 tabs sticking out the ends that were on the last 1/4th inch.
The Printer's Front Panel Displays Printer Error - Report Fault: 07
The Drum Maintenance home sensor actuated, but not at the expected time.
Did not fix.
TRY FIRST (Solutions without parts):
The wiring harness from the clutch is not seated properly on the I/O Left board. Check all wiring connections to the I/O boards and verify. connectivity.
TROUBLESHOOTING TIPS AND HINTS:
Inspect the maintenance drawer lift pins for wear. See Service Bulletin #445 Rev #1 Replace Drum Maintenance Cam Followers for Inadequate Drum oiling Due to Worn-out Lift Pins. Run diagnostics to verify clutch and sensor operation. Also verify that the drum maintenance shaft is properly assembled.
Parts are listed in the order of highest probability for repair.
CLUTCH; LARGE,DM,SAFETY CONTROLLED
MAINTENANCE DRAWER W/10K ROLLER & COUNTER/PHASER 860/8200
FOLLOWER,CAM; DM CAM,SAFETY CONTROLLED, QTY 1