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

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Phaser 5400 Laser Printer Service Guide 101
RAP 33 Error Code U5: Fan Failure
Power Off Now
The printer is detecting incorrect fan rotation.
Table 54 Error Code U5: Fan Fail Troubleshooting Procedure
Step Actions and Questions Yes No
1 Do both fans rotate when printer power is
switched ON?
Go to
Step 3. Go to
Step 2.
2 Are both of the fans stopped? Go to
Step 4. Replace the
fan that is
not running
[RRP 8.4,
page 309 /
RRP 8-7,
page 313 ].
3 DIAGNOSTICS CHECK
1. Enter Diagnostics mode.
2. From the Main Menu, select Component Test / Fan
Motor High / press [4] to start, [0] to stop.
Do the fans rotate at high speed?
Replace the
Print Engine
Controller
Board
[RRP 8.5,
page 310 ].
Go to
Step 4.
4 VOLTAGE CHECK
1. Switch printer power OFF. Remove power cord from
rear of printer.
2. Remove the Lower Rear Cover [RRP 1.7, page 256 ].
3. Reconnect power cord to printer. Switch printer power
ON.
4. Check for +24 VDC between P/J161-13 and frame
ground.
5. Check for +0.6 VDC between P/J161-12 and frame
ground.
Are both voltages (+24 VDC and +0.6 VDC)
correct?
Replace the
LVPS
[RRP 8.6,
page 312 ].
Replace the
Print Engine
Controller
Board
[RRP 8.5,
page 310 ].
5
DIAGNOSTICS CHECK
1. Enter Diagnostics mode.
2. From the Main Menu, select Component Test / Fan
Motor High / press [4] to start, [0] to stop.
Do the fans rotate at high speed?
Replace the
Print Engine
Controller
Board
[RRP 8.5,
page 310 ].
Go to
Step 5.
6 SUSPECT COMPONENTS
The following printer components and areas are
associated with this specific problem. One or more of
these components or areas may have failed partially or
completely. If you cannot isolate this problem using the
steps in this Repair Analysis Procedure, replace each
component or troubleshoot each area listed below, one
at a time, until you isolate and solve the problem.
■
Cooling Fans [RRP 8.4, page 309 / RRP 8-7,
page 313 ]
■
Low Voltage Power Supply (LVPS) [RRP 8.6,
page 312 ]
■
Wiring and connectors linking the components.