Phaser 4500/4510 Service Manual 3-75
Error Messages and Codes
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 10-37
■ “Stacker General Wiring Diagram” on
page 10-36
■ “Stacker Plug/Jack Locator” on page 10-16
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 8-73).
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 8-73).
Problem solved.
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