Stacker Rear Cover Switch - Xerox Phaser 4500 Service Manual

General Troubleshooting

Stacker Rear Cover Switch

4-58
Troubleshooting Reference
Applicable Parts
Rear cover switch
Rear cover assembly harness
Stacker PWBA
Stacker harness 2
HVPS/engine logic board
LVPS
Stacker harness 1
Troubleshooting Procedure
Steps Actions and Questions
Check the rear cover switch (1):
1
1. Remove the rear cover switch.
2. Test for continuity across J740-2 <=>
J740-1 while pushing and releasing the
stacker rear cover switch.
Is the switch continuous when pushed,
and open when released?
Check the rear cover harness:
2
1. Remove the rear cover harness.
2. Test J74 <=> J740 for continuity.
Is the harness continuous?
Check stacker harness 2:
3
1. Disconnect P/J70 from stacker PWBA.
2. Remove stacker harness 2.
3. Test J70 <=> J3070 for continuity
Is the harness continuous?
Check stacker harness 1:
4
1. Remove stacker harness 1.
2. Test J30 <=> J3070 for continuity
Is the harness continuous?
5 Check the rear cover switch (2):
Measure the voltage across P/J30-4 <=> P/
J30-3 on the HVPS/engine logic board.
Does the voltage measure +3.3 VDC?
6 Check the HVPS/engine logic board:
1. Disconnect P/J30 from the HVPS/engine
logic board.
2. Test P30-4 <=> P11-16 for continuity.
Is it continuous?
Wiring and Plug/Jack Map References
"Stacker Signal Diagram" on page 10-37
"Stacker General Wiring Diagram" on
page 10-36
"P4500: 24 V Interlock, Rear Cover Switch,
Main Motor, Sub Fan, Exit Motor Assembly" on
page 10-21
"Stacker Plug/Jack Locator" on page 10-16
Yes
Go to step 2.
Go to step 3.
Go to step 4.
Go to step 5.
Go to
"Stacker
PWBA" on
page 4-54.
Replace the
HVPS/engine
logic board
(page 8-73).
Phaser 4500/4510 Service Manual
No
Replace the
rear cover
switch.
Replace the
rear cover
harness.
Replace
stacker
harness 2.
Replace
stacker
harness 1.
Go to step 6.
Go to "LVPS
(Low Voltage
Power
Supply)" on
page 4-4.