Dc Power Supply Troubleshooting - Xerox phaser 6250 Service Manual

DC Power Supply Troubleshooting

Troubleshooting Reference
Applicable Parts
Low Voltage Power Supply, PL 12.1.10
Procedure
Step Action and Questions
1 Perform the AC power supply troubleshooting procedure first, if this does not fix the
problem go to Step 2.
2 Turn the AC power Switch OFF.
Is the fuse (F001) on the low-voltage
power supply board open?
3 Disconnect the connectors J163, J164
and J165 from the LVPS, turn the AC
power switch on and verify the DC
voltages between the following pins on
the Low Voltage Power Supply board.
P163-1 <=> P163-2 = +24 VDC?
P164-1 <=> P164-2 = +3.3 VDC?
P165-1 <=> P165-2 = +5 VDC?
P165-3 <=> P165-4 = +3.3 VDC?
Caution
Be careful not to touch any other
pins during these measurements or
you may blow the fuse (F001) on the
LVPS.
4 Turn the AC power switch OFF.
Connect J164 to the LVPS then turn the
AC power switch ON.
P/J164-1 <=>P/J164-2 = +3.3 VDC?
5 Check the following parts for fault or
damage:
■
■
6 Does the problem recur?
4-12
LVRPG Harness Assembly for
damage or if it is shorted to the
frame.
Engine Control Board.
Phaser 6250 Color Laser Printer Service Manual
Wiring and Plug/Jack Map References
"Power Supply" on page 10-16
Yes
Replace the Low-
Voltage Power
Supply Board,
page 8-99.
Go to Step 4.
Go to Step 7.
Replace if
damaged or
defective.
Go to Step 7
No
Go to Step 3.
Replace the Low-
Voltage Power
Supply Board,
page 8-99.
Go to Step 5.
Go to Step 7.
Complete