Xerox Phaser 7700 Service Manual page 98

Error Chain /
Code Link
116 12-254 FINISHER ERROR 116 STACKER HEIGHT SENSOR OFF
FAILURE
Is the Finisher Stacker Tray installed?
Yes No
Install Finisher Stacker Tray.
Switch printer power OFF, then ON.
Inspect the Stack Height Sensor Actuator for proper installation or damage.
Is the Stack Height Sensor Actuator installed correctly and in good condition?
Yes No
Reinstall or replace the Stack Height Sensor Actuator.
Switch printer power OFF, then ON.
Enter Service Diagnostics Mode.
From the Main Menu, select "Stacker Tests/Finisher Sensors/Stacker."
Remove the two screws holding the access door halves together.
Manually operate the Stacker Height Sensor by moving the actuator.
Does the display indicate the Stack Height Sensor toggling between H & L?
Yes No
Remove the Rear Cover and the Board Cover (RRP 72, on page 11-310).
Measure the voltage between the Finisher Control Board P850B-5 (see figure page 3-47)
and Finisher frame ground.
Again manually actuate the Stack Height Sensor.
Does the voltage toggle between +5 VDC and 0 VDC?
Yes No
Measure the voltage at the Stack Height Sensor pin 2 (yellow) and Finisher frame
ground.
Once again manually actuate the Stack Height Sensor.
Does the voltage toggle between +5 VDC and 0 VDC?
Yes No
Measure the voltage at Stack Height Sensor pin 1 (gray).
Does the voltage measure +5 VDC?
Yes No
Measure the voltage between the Finisher Control Board P850B-6
(see figure page 3-47) and Finisher frame ground.
Does the voltage measure +5 VDC?
Yes No
Replace the Finisher Control Board (RRP 77, on page 11-316).
Repair or replace the wiring harness between the Finisher Control Board
and the Stack Height Sensor.
Note
A B C D
Service Quick Reference Guide - Diagnostics, Error Codes & Messages
Front Panel Message
There is an intermediate connector in this
harness (J870) behind the Front Cover.
Remove Front Door to repair/replace the
harness.
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