Dc-Dc Converter - Xerox Phaser 4500 Service Manual

Troubleshooting Procedure (Continued)
Steps Actions and Questions
4 Is the AC power supply outlet correctly
wired and grounded?

DC-DC Converter

Troubleshooting Reference
Applicable Parts
DC-DC Converter PWBA
LVPS Harness Assembly
Troubleshooting Procedure
Steps Actions and Questions
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?
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?
General Troubleshooting
Yes
Replace the
HVPS/Engine
Logic Board.
(page 8-89)
Wiring and Plug/Jack Map References
"Image Processor Board, DC-DC Converter, Front
Panel" on page 10-26
"Printer Left Side" on page 10-9
Yes
Go to step 2.
Go to step 3.
No
Inform the
customer or the
electrician.
No
Go to "LVPS (Low
Voltage Power
Supply)" on
page 4-4.
Go to "LVPS (Low
Voltage Power
Supply)" on
page 4-4.
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