Xerox Phaser 4500

4-34 Phaser 4500 Service Manual
Left Tray Guide
4
Check the HVPS/Engine Logic Board:
1. Disconnect P/J24 and P/J10 from the
HVPS/Engine Logic Board.
2. Test for continuity across the following
points:
■ J24-12 <=> J10-1
■ J24-4 <=> J10-1
Are both continuous
Go to “LVPS (Low
Voltage Power
Supply)” on
page 4-4.
Replace the
HVPS/Engine
Logic Board
(page 8-89).
Troubleshooting Reference
Applicable Parts Wiring and Plug/Jack Map References
■ Left Tray Guide
■ LVPS Harness Assembly
■ HVPS/Engine Logic Board
■ LVPS
■ “150-Sheet Feeder, 550-Sheet Feeder, Main Fan”
on page 10-22
■ “Print Engine General Wiring Diagram” on
page 10-17
Troubleshooting Procedure
Steps Actions and Questions Yes No
1
Check the LVPS Harness Assembly:
1. Disconnect P/J18 from the HVPS/
Engine Logic Board.
2. Disconnect P/J1821.
3. Test each cable between J18 <=> J1821
for continuity.
Are all continuous?
Go to step 2. Replace the
LVPS Harness
Assembly.
2
Check Left Tray Guide:
Test each cable between:
■ Tray1 Size Switch <=> J1821
■ Tray2 Size Switch <=> J1821
Are all continuous?
Go to “HVPS/
Engine Logic
Board” on
page 4-35.
Replace the Left
Tray Guide
(page 8-41).
Troubleshooting Procedure (Continued)
Steps Actions and Questions Yes No