Xerox Phaser 4500

4-38 Phaser 4500 Service Manual
Image Processor Board
Troubleshooting Reference
Applicable Parts Wiring and Plug/Jack Map References
■ Image Processor Board
■ DC-DC Converter
■ DC-DC Converter Harness
■ LVPS
■ LVPS Harness
■ “Image Processor Board, DC-DC Converter, Front
Panel” on page 10-26
■ “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 5 V power:
1. Disconnect J402 from the DC-DC
Converter.
2. Measure the voltage across P402-1 <=>
P402-2.
Does the voltage measure +5 VDC?
Go to step 2. Go to “DC-DC
Converter” on
page 4-5.
2
Check the 3.3 V power:
Measure the voltage across P402-3 <=>
P402-4.
Does the voltage measure +3.3 VDC?
Go to step 3. Go to “DC-DC
Converter” on
page 4-5.
3
Check the DC-DC Converter Harness:
1. Disconnect P/J402 and J130.
2. Test each cable between J402 <=> J130
for continuity.
Are all continuous?
Replace the I/P
Board
(page 8-91).
Replace the
DC-DC Converter
Harness.