Table 70 Inoperative Printer Troubleshooting - Xerox 5400N - Phaser B/W Laser Printer Service Quick Reference Manual

RAP 44 Inoperative Printer
Printer power cannot be switched ON.
Table 70 Inoperative Printer Troubleshooting
Step Actions and Questions
1 AC POWER CORD
Ensure the power cord is properly connected to the wall
outlet and to the back of the printer.
Does the problem still exist?
2 AC POWER
Perform RAP 38,
Did RAP 38 indicate the correct AC voltage is
being supplied to the printer?
DC POWER
3
Perform RAP 40,
Did RAP 40 indicate the correct DC voltages are
being supplied throughout the printer?
4 Did RAP 40 instruct you to replace a
component?
5 SYSTEM CONTROLLER +3.3 VDC CHECK
1. Remove the Left Side Cover [RRP 1.1,
2. On the System Controller Board, measure the voltage
between P/J3-1 and P/J3-2.
Does the voltage measure +3.3 VDC between
P/J3-1 and P/J3-2?
6 +3.3 VDC LOAD CHECK AT SYSTEM
CONTROLLER P/J3
1. Switch printer power OFF.
2. Disconnect P/J3 from the System Controller Board.
3. Switch printer power ON.
4. Check the voltage between pins 1 and 2 on the
disconnected plug.
Is the voltage +3.3 VDC between pins 1 and 2 on
the disconnected plug?
7 LOW VOLTAGE POWER SUPPLY
1. Remove the Lower Rear Cover [RRP 1.7,
to access the LVPS.
2. Measure the voltage between P/J163-1 and P/J163-2.
Note: Do not reinstall the Lower Rear Cover until
this RAP is completed. You may need to make
additional tests on the LVPS.
Does the voltage between P/J163-1 and P/J163-2
measure +3.3 VDC?
120
AC Power, then return here.
DC Power (LVPS), then return here.
Yes
Go to
Step 2.
Go to
Step 3.
Go to
Step 5.
Replace
component
as
necessary.
Go to
Step 8.
page 250].
Go to
Step 11.
Repair or
replace the
page 256]
harness
between the
LVPS and
the System
Controller
Board.
Phaser 5400 Laser Printer Service Guide
No
Problem
solved.
Notify
customer
that power is
out of spec.
Go to
Step 4.
Perform
RAP 41,
page 116.
Go to
Step 6.
Go to
Step 7.
Replace the
LVPS
[RRP 8.6,
page 312].