4-64 Phaser 4500 Service Manual
4
Check Stacker Harness 1:
1. Remove Stacker Harness 1.
2. Test J30 <=> J3070 for continuity
Is the harness continuous?
Go to step 5. Replace Stacker
Harness 1.
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?
Go to “Stacker
PWBA” on
page 4-59.
Go to step 6.
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 is continuous?
Replace the
HVPS/Engine
Logic Board
(page 8-89).
Go to “LVPS (Low
Voltage Power
Supply)” on
page 4-4.
Troubleshooting Procedure (Continued)
Steps Actions and Questions Yes No
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