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

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Phaser 5400 Laser Printer Service Guide 121
8 SYSTEM CONT5 VDC CHECK
Measure the voltage between pins 1 and 2 of P/J13 on
the System Controller Board.
Does the voltage between P/J13, pins 1 and 2
m5.0 VDC?
Replace the
System
Controller
Board
[RRP 1.1,
page 250 ]. If
problem
persists,
replace the
Print Engine
Controller
Board
[RRP 8.5,
page 310 ].
Go to
Step 9.
9 SYSTEM CONT5 VDC LOAD CHECK
1. Switch printer power OFF.
2. Disconnect P/J13 from the System Controller Board.
3. Measure the voltage between pins 1 and 2 of the
disconnected plug.
Does the voltage between pins 1 and 2 of the
disconnected plug m5.0 VDC?
Go to
Step 11. Go to
Step 10.
10 LVPS +24 VDC CHECK AT P/J168
Measure the voltage between pins 1 and 2 of P/J168 on
the LVPS.
Does the voltage between P/J168, pins 1 and 2
on the LVPS m24 VDC?
Replace the
System
Controller
Board +5
VDC Power
Supply
[RRP 8.9,
page 315 .
Replace the
LVPS
[RRP 8.6,
page 312 ].
11 REMOVE OPTIONS
1. Switch printer power OFF.
2. Remove any options connected to the System
Controller Board.
3. Reconnect P/J3 to the System Controller Board.
4. Switch printer power ON.
5. Check the voltage on P/J3 between pins 1 and 2.
Note: If there are no options installed, follow the NO
path.
Does the voltage between P/J3-1 and P/J3-2
m3.3 VDC?
Go to
Step 9. Replace the
System
Controller
Board
[RRP 8.1,
page 305 ].
12 INSTALL OPTIONS ONE AT A TIME
1. Switch printer power OFF.
2. Reinstall any one of the removed options.
3. Switch printer power ON.
4. Check the voltage on P/J3 between pins 1 and 2.
Does the voltage between P/J3-1 and P/J3-2
m3.3 VDC?
Switch
printer
power OFF.
Install next
option and
repeat
Step 9 until
voltage fails. Replace the
defective
option just
installed.
Problem
solved.
Table 70 Inoperative Printer Troubleshooting (cont'd.)
Step Actions and Questions Yes No