Xerox Phaser 4500

4-16 Phaser 4500 Service Manual
Fuser Assembly
Troubleshooting Reference
Applicable Parts Wiring and Plug/Jack Map References
■ Fuser Assembly
■ HVPS/Engine Logic Board
■ 24 V Interlock
■ Fuser Assembly Harness 110V/
220V
■ AC Power Harness Assembly
■ LVPS
■ LVPS Harness Assembly
■ “Fuser Assembly, Power Switch” on page 10-20
■ “24 V Interlock, Rear Cover Switch, Main Motor, Sub
Fan, Exit Motor Assembly” on page 10-18
■ “Print Engine General Wiring Diagram” on
page 10-17
■ “Print Engine Plug/Jack Locator” on page 10-3
Troubleshooting Procedure
Steps Actions and Questions Yes No
1
Check the Heater circuit for continuity
1. Remove the LVPS Shield Plate
(page 8-75).
2. Disconnect P/J47 from the LVPS.
3. Measure the following for continuity:
■ J47-1 <=> J47-5
■ J47-1 <=> J47-3
Do the conductors exhibit continuity?
Go to step 3. Go to step 2.
2
Check the Fuser Assembly Harness for
continuity:
Warning: Allow the Fuser Assembly to
cool before removing.
1. Remove the Fuser Assembly
(page 4-16).
2. Measure the following for continuity:
■ J4647B-3 <=> J47-1
■ J4647B-2 <=> J47-3
■ J4647B-1 <=> J47-5
Do the conductors exhibit continuity?
Replace the Fuser
Assembly
(page 8-54).
Replace the
Fuser Assembly
Harness
(page 8-54).
3
Check the Fuser power source voltage:
1. Disconnect P/J48 from the LVPS.
2. Remove the Print Cartridge.
3. Turn the power ON.
4. Measure the voltage across P/J48-1 <=>
P/J48-3
Does it measure at line voltage?
Go to step 5. Go to step 4.