Xerox Phaser 4500, Service Manual

Page: 169 / 537

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.