Xerox Phaser 7750DXF, Service Manual

Page: 121 / 505

Error Messages and Codes 3-55
Finisher Stacker Tray Failure, Code 117
The system detected that the Stacker Tray Upper Limit Sensor was turned ON after
the Stacker Tray began lifting up. Or the Stacker Tray Upper Limit Sensor remained
on after the lowering down of the Stacker Tray was completed.
Troubleshooting References
Applicable Parts Wiring and Plug/Jack Map References
■
Stacker Motor
■
Finisher Control Board
Troubleshooting Procedure
Step Actions and Questions Yes No
1 1. Actuate the stacker upper limit sensor in
diagnostics.
2. Does the value change between H and L?
Go to step 2. Troubleshoot
using the
transmissive
sensor
procedure.
2 1. Run the Finisher Stacker Motor Down test
in diagnostics.
2. Does the stacker tray lower?
Go to step 5. Go to step 3.
3 Does the stacker motor turn? Diagnose and
repair the
mechanical
problem. Check
the stacker motor
gear, stacker
tray, and belt
track gear. Go to step 4.
4 Is +24 VDC present at P/J 847-12 with the
Finisher Stacker Motor Down test running in
diagnostics? Replace the
stacker motor. Replace the
finisher control
board.
5 1. Run the Finisher Stacker Motor Up test in
diagnostics.
2. Does the stacker tray move up?
Replace the
finisher control
board. Go to step 6.
6 Does the stacker motor turn? Diagnose and
repair the
mechanical
problem. Check
the stacker motor
gear, stacker tray
and belt track
gear. Go to step 7.