Xerox Phaser 7760 Service Manual page 271

012-212 Stacker Upper Limit Fail
When Stack Height Sensor 2 On was detected after the Stacker Tray had started lifting up.
Initial Actions
Check the following components:
• Upper Limit SW for improper installation
• Upper Limit SW connectors for connection failure
• Elevator Motor for operation failure
• Elevator Motor connectors for connection failure
Procedure
Enter Service Diagnostics Menu: Printer Menu > Troubleshooting > Service Tools > Printer
Status Page > hold the Up and Down buttons simultaneously > Run Service Diagnostics >
OK. Actuate the Elevator Motor alternately. The Elevator Motor
Y N
Check continuity between the Elevator Motor and Finisher Main PWB
continuity check is OK.
Y N
Repair the open circuit or short circuit.
Replace the Elevator Motor (PL 21.4). If the problem continues, replace the Finisher PWB
(PL 21.12).
Enter the Service Diagnostics menu. Block/unblock the Stacker No Paper Sensor
The display changes.
Y N
Check continuity between the Stacker No Paper Sensor and Finisher PWB
The continuity check is OK,
Y N
Repair the open circuit or short circuit.
Replace the Stacker No Paper Sensor
Finisher PWB
Enter the Service Diagnostics menu. Block/unblock the Upper Limit Sensor
display changes.
Y N
Check continuity between the Upper Limit Sensor and Finisher PWB
continuity check is OK,
Y N
Repair the open circuit or short circuit.
Replace the Upper Limit Sensor (PL
PWB.
If the problem continues, replace the Finisher PWB
Revised
Phaser 7760 Color Laser Printer
(PL 21.4) runs.
(Figure
(PL 21.4). If the problem continues, replace the
(PL 21.4). The
(Figure 1). The
21.4). If the problem continues, replace the Finisher
(PL 21.12).
1). The
(PL 21.4).
(Figure 1).
January 2010
2-235
Status Indicator RAP's
012-212