Xerox Phaser 4500 Service Manual

General Troubleshooting 4-9
8
1. Disconnect the Front Panel harness
from the Image Processor Board (J110).
2. Remove the Print Cartridge.
3. Turn the power ON and check for air
blowing from the exhaust on back of the
printer.
Does the Main Fan rotate when the
power is turned ON?
Go to step 9. Go to step 10.
9
1. Disconnect the Front Panel harness
from the Image Processor Board (J110).
2. Test each wire in the Front Panel
harness for continuity.
Are there any open or shorted wires in
the harness?
Replace the Front
Panel Harness
(page 8-91).
Replace the Front
Panel
(page 8-10).
10
1. Disconnect P/J13, P/J16 and P/J17 from
the HVPS/Engine Logic Board.
2. Remove the Print Cartridge.
3. Turn the power ON and check for Main
Fan rotation.
Does the Main Fan rotate when the
power is turned ON?
Replace the Laser
Unit Assembly.
(page 8-46)
Go to step 11.
11
1. Disconnect P/J20 from the HVPS/
Engine Logic Board.
2. Remove the Print Cartridge.
3. Turn the power ON and check for Main
Fan rotation.
Does the Main Fan rotate when the
power is turned ON?
Replace the 550-
Sheet Feeder
PWBA
(page 8-102).
Go to step 12.
12
1. Open the Top and Rear Covers.
2. Disconnect P/J44 and P/J45 from the
LVPS.
3. While testing for continuity across
P/J44-1 <=> P/J44-3 (Rear Cover
Switch), close the Rear Cover.
4. While testing for continuity across
P/J45-1 <=> P/J45-3 (24 V Interlock),
close the Top Cover.
Does each switch indicate continuity
when its cover is closed?
Go to step 13. Replace the faulty
Interlock Switch
(page 8-13,
page 8-83).
Troubleshooting Procedure (Continued)
Steps Actions and Questions Yes No

Xerox Phaser 4500 Specifications

General

Brand	Xerox
Model	Phaser 4500
Category	Printer
Language	English