Page 2-12
Xerox WorkCentre 450c/450cp Service Manual
RAP 2.2: Power Supply DC
Voltage Check
See Parts List 3.1
1. Prepare to test the power supply
by performing the following
REPs:
•
REP 1.1: WorkCentre Cover
on page 4-3
•
REP 2.1.18: Printer Assembly
on page 4-24 (Steps 1 - 5)
note
Do not disconnect the cables
from the main board to the
printer. Carefully position the
printer in such a way that you
have access to the power supply
test points.
1. Apply power to the machine.
note
WARNING! There are exposed
areas of high voltage on the
power supply. Use caution when
working in this area with the
multimeter probes.
2. Using a multimeter, place the
Common lead on the GND test point,
and the Positive lead on the +5 VDC
test point. See Figure 2-3 for test
point locations. Make a note of the
voltage reading.
Figure 2-3 Power Supply Voltage Test Points
3. Place the Common lead on the GND test point, and the
Positive lead on the +41.7 VDC test point. Make a note of
the voltage reading.
4. Place the Common lead on the GND test point, and the
Positive lead on the +12 VDC test point. Make a note of
the voltage reading.
5. Place the Common lead on the GND test point, and the
Positive lead on the -12 VDC test point. Make a note of
the voltage reading.
The GND, 41.7, and +5 VDC test
points are located near power
supply connector CN3
The +12 VDC and -12 VDC
voltage test points are
located near the connector
closest to the scanner.
+5 VDC
test point
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