Xerox 5400N - Phaser B/W Laser Printer, Service Quick Reference Manual

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120 Phaser 5400 Laser Printer Service Guide
RAP 44 Inoperative Printer
Printer power cannot be switched ON.
Table 70 Inoperative Printer Troubleshooting
Step Actions and Questions Yes No
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?
Go to
Step 2. Problem
solved.
2 AC POWER
Perform RAP 38, AC Power , then return here.
Did RAP 38 indicate the correct AC voltage is
being supplied to the printer?
Go to
Step 3. Notify
customer
that power is
out of spec.
3 DC POWER
Perform RAP 40, DC Power (LVPS) , then return here.
Did RAP 40 indicate the correct DC voltages are
being supplied throughout the printer?
Go to
Step 5. Go to
Step 4.
4 Did RAP 40 instruct you to replace a
component?
Replace
component
as
necessary. Perform
RAP 41,
page 116 .
5 SYSTEM CONT3.3 VDC CHECK
1. Remove the Left Side Cover [RRP 1.1, page 250 ].
2. On the System Controller Board, measure the voltage
between P/J3-1 and P/J3-2.
Does the voltage m3.3 VDC between
P/J3-1 and P/J3-2?
Go to
Step 8. Go to
Step 6.
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 v3.3 VDC between pins 1 and 2 on
the disconnected plug?
Go to
Step 11. Go to
Step 7.
7 LOW VOLTAGE POWER SUPPLY
1. Remove the Lower Rear Cover [RRP 1.7, page 256 ]
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
m3.3 VDC?
Repair or
replace the
harness
between the
LVPS and
the System
Controller
Board. Replace the
LVPS
[RRP 8.6,
page 312 ].