Xerox Phaser 4500

General Troubleshooting 4-5
DC-DC Converter
4
Is the AC power supply outlet correctly
wired and grounded?
Replace the
HVPS/Engine
Logic Board.
(page 8-89)
Inform the
customer or the
electrician.
Troubleshooting Reference
Applicable Parts Wiring and Plug/Jack Map References
■ DC-DC Converter PWBA
■ LVPS Harness Assembly
■ “Image Processor Board, DC-DC Converter, Front
Panel” on page 10-26
■ “Printer Left Side” on page 10-9
Troubleshooting Procedure
Steps Actions and Questions Yes No
1
Check the 24 V input:
1. Remove the LVPS Shield Plate
(page 8-75).
2. Disconnect J404A from P404 (in-line
connector).
3. Turn the power ON.
4. Measure the voltage across J404A-3
<=>J404A-2
Does the voltage measure 24 VDC?
Go to step 2. Go to “LVPS (Low
Voltage Power
Supply)” on
page 4-4.
2
Check the 3.3 V input:
1. Disconnect J40 from the LVPS.
2. Turn the power ON.
3. Measure the voltage across P/J40-3 <=>
P/J40-4.
Does the voltage measure 3.3 VDC?
Go to step 3. Go to “LVPS (Low
Voltage Power
Supply)” on
page 4-4.
Troubleshooting Procedure (Continued)
Steps Actions and Questions Yes No