Xerox Phaser 4500, Service Manual

Page: 152 / 537

Error Messages and Codes 3-73
No Recognition of Stacker
Troubleshooting Reference
Applicable Parts Wiring and Plug/Jack Map References
■
HVPS/Engine Logic Board
■
Stacker Assembly Harness 1
■
Stacker PWBA
■
Stacker Assembly Harness 2
■
“Stacker Signal Diagram” on page 10-32
■
“Stacker General Wiring Diagram” on page 10-31
■
“Stacker Plug/Jack Locator” on page 10-14
Troubleshooting Procedure
Steps Actions and Questions Yes No
1 Check the Stacker detection signal (1):
1. Disconnect P/J70 on the Stacker PWBA.
2. Measure the voltage across J70-5 <=>
J70-6 of Stacker Assembly Harness 2.
Does the voltage measure 3.3 VDC?
Go to step 5. Go to step 2.
2
Check the Stacker detection signal (2):
Measure the voltage across P/J30-4 <=>
P/J30-3 on the HVPS/Engine Logic Board.
Does the voltage measure 3.3 VDC? Go to step 3. Replace the
HVPS/Engine
Logic Board
(page 8-89).
3 Check Stacker Assembly Harness 2:
Remove Stacker Assembly Harness 2.
Check for continuity between J70 <=>
J3070.
Is the harness continuous? Go to step 4. Replace Stacker
Assembly
Harness 2.
4 Check Stacker Assembly Harness 1:
1. Remove Stacker Assembly Harness 1.
2. Check for continuity between J30 <=>
J3070.
Is the harness continuous?
Go to step 5. Replace Stacker
Assembly
Harness 1.
5 Replace the Stacker PWBA.
Does the problem still occur? Replace the
HVPS/Engine
Logic Board
(page 8-89).
Problem solved.