Xerox Phaser 6250 Service Manual page 182

Procedure (Continued)
Step Action and Questions
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?
7 Turn the AC power switch OFF.
Connect J165 to the LVPS then turn the
AC power switch ON.
Verify:
P/J165-1 <=> P/J165-2 = +5 VDC?
P/J165-3 <=> P/J165-4 = +3.3 VDC?
8
Check the following parts for fault or
damage:
9 Does the error recur?
10 Turn the AC power Switch OFF
Connect J163 to the LVPS then turn the
AC power switch ON.
P/J163-1 <->P/J163-2 = +24 VDC?
11 Check the following for fault or damage:
4-14
LVRPG Harness Assembly for
damage or if it is shorted to the
frame.
Engine Control Board.
LVNC Harness Assembly
Motor Driver Board
24V Harness Assembly
Motor Driver Board
Phaser 6250 Color Laser Printer Service Manual
Yes
Go to Step 4.
Go to Step 7.
Replace if
damaged or
defective.
Go to Step 7
Go to Step 10.
Replace if
damaged or
defective.
Go to Step 10.
Complete
Replace if
damaged or
defective.
No
Replace the Low-
Voltage Power
Supply Board,
page 8-99.
Go to Step 5.
Go to Step 7.
Complete
Go to Step 8.
Go to Step 10.
Complete
Go to Step 11.
Complete