Xerox Phaser 7760 Service Manual page 269

012-211 Stacker Tray Fail
The system detected 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
Table 1 References
Applicable Parts Part List
Stacker Motor PL 21.4
Finisher Control Board PL 21.12
Troubleshooting Procedure
Table 2 Procedure
Step Actions and Questions
1 1. Actuate the Stacker Upper Limit Sen-
sor in Diagnostics.
2. Does the value change between H and
L?
2 1. Enter Service Diagnostics Menu:
Printer Menu > Troubleshooting >
Service Tools > Printer Status Page
> hold the Up and Down buttons
simultaneously > Run Service Diag-
nostics > OK. Run the Finisher
Stacker Motor Down test.
2. Does the Stacker Tray lower?
3 Does the Stacker Motor turn?
4 Is +24 VDC present at P/J847-12 with the
Finisher Stacker Motor Down test running in
Diagnostics?
5 1. Run the Finisher Stacker Motor Up
test in Diagnostics.
2. Does the Stacker Tray move up?
Revised
Phaser 7760 Color Laser Printer
Wiring and Plug/Jack References
Section 7, Finisher PWB Plug/Jack Locations -
ure 30
Yes No
Go to step 2. Troubleshoot using
the Transmissive
Sensor Procedure
procedure (Section
6).
Go to step 5. Go to step 3.
Diagnose and repair Go to step 4.
the mechanical
problems. Check
the Stacker Motor
Gear, Stacker Tray,
and Belt Track Gear.
Replace the Stacker Replace the Fin-
Motor. isher Control Board
(REP 12.68).
Replace the Fin- Go to step 6.
isher Control Board.
Step Actions and Questions
6 Does the Stacker Motor turn?
7 Is +24 VDC present at P/J847-11 with the
Finisher Stacker Motor Down test running in
Diagnostics?
Fig-
January 2010
2-233
Table 2 Procedure
Yes No
Diagnose and repair Go to step 7.
the mechanical
problem. Check the
Stacker Motor Gear,
Stacker Tray, and
Belt Track Gear.
Replace the Stacker Replace the Fin-
Motor. isher Control Board
(REP
Status Indicator RAP's
12.68).
012-211