Xerox Phaser 4500, Service Manual

Page: 160 / 537

General Troubleshooting 4-7
AC Power Supply Troubleshooting
No AC Power
Troubleshooting Reference
Applicable Parts Wiring and Plug/Jack Map References
■
Power Cord
■
LVPS
■
HVPS/Engine Logic Board
■
Front Panel
■
Front Panel Harness
■
24 V Interlock
■
5 V Interlock
■
Rear Cover Switch
■
Main Fan
■
Sub Fan
■
Laser Unit Assembly
■
Fuser Assembly
■
Gear Assembly Housing
■
Main Motor
■
Registration Clutch
■
Image Processor Board
■
550-Sheet Feeder PWBA
■
Duplex Unit PWBA
■
Feed Clutch Assembly
■
Turn Roller Clutch
■
“Print Engine General Wiring Diagram” on
page 10-17
■
“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
■
“Image Processor Board, DC-DC Converter, Front
Panel” on page 10-26
■
“150-Sheet Feeder, 550-Sheet Feeder, Main Fan”
on page 10-22
■
“Laser Unit, 5 V Interlock, Interlock Switch
Assembly” on page 10-24
■
“550-Sheet Feeder Signal Diagram” on page 10-28
■
“Duplex Unit Signal Diagram” on page 10-30
■
“Print Engine Plug/Jack Locator” on page 10-3
■
“Duplex Unit Plug/Jack Locator” on page 10-12
Troubleshooting Procedure
Steps Actions and Questions Yes No
1 Check the Power Cord for continuity.
Is each conductor of the Power Cord
continuous? Go to step 2. Replace the
Power Cord.
2 Check the AC power.
Does the voltage of the AC power
source meet requirements? Go to step 3. Ask the customer
to repair the AC
power source.
3
1. Remove the LVPS Shield Plate
(page 8-75)
2. Check the fuse on the LVPS.
Is the fuse blown?
Replace the LVPS
(page 8-78). Go to step 4.