Xerox Phaser 4500 Service Manual

General Troubleshooting 4-21
4
Check the power to No Paper Sensor:
1. Remove the Print Cartridge.
2. Measure the voltages across P/J24-6
<=> P/J24-7 and P/J24-1 <=> P/J24-2
on the HVPS/Engine Logic Board.
Do the voltages measure 3.3 VDC?
Go to step 5. Go to step 6.
5
Check the Chute Assembly Harness:
1. Disconnect P/J24 from the HVPS/
Engine Logic Board.
2. Disconnect P/J245 and P/J248.
3. Test the harness for continuity at these
points:
■ J24-6 <=> J245-13
■ J24-7 <=> J245-12
■ J24-8 <=> J245-11
■ J24-1 <=> J248-5
■ J24-2 <=> J248-4
■ J24-3 <=> J248-3
Are all the conductors continuous?
Go to step 7. Replace the
Chute Assembly
Harness.
6
Check the Tray 1 and Tray 2 Harnesses:
1. Remove the No Paper Sensor.
2. Disconnect P/J24 from HVPS/MCU.
3. Test the harnesses for continuity at
these points:
■ P/J245-1 <=> P/J240-3
■ P/J245-2 <=> P/J240-2
■ P/J245-3 <=> P/J240-1
■ P/J248-1 <=> P/J246-3
■ P/J248-2 <=> P/J246-2
■ P/J248-3 <=> P/J246-1
Are all the conductors continuous?
Go to step 8. Replace the
Tray 1 or Tray 2
Harness.
7
Check the HVPS/Engine Logic Board:
1. Disconnect P/J11 from the HVPS/
Engine Logic Board.
2. Test the following points for continuity:
■ P/J11-16 <=> P/J24-6
■ P/J11-16 <=> P/J24-1
Are both continuous?
Go to “LVPS (Low
Voltage Power
Supply)” on
page 4-4.
Replace the
HVPS/Engine
Logic Board
(page 8-89).
8
Replace the No Paper Sensor (page 8-28,
page 8-38).
Does the problem still occur after
replacement?
Replace the
HVPS/Engine
Logic Board
(page 8-89).
Problem solved.
Troubleshooting Procedure (Continued)
Steps Actions and Questions Yes No

Xerox Phaser 4500 Specifications

General

Brand	Xerox
Model	Phaser 4500
Category	Printer
Language	English