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

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98 Phaser 5400 Laser Printer Service Guide
RAP 31 Error Code U2: Laser Failure
Power Off / On
There is a problem with the Laser Assembly .
Table 52 Error Code U2: Laser (ROS (Laser Scanner)) Failure
Troubleshooting Procedure
Step Actions and Questions Yes No
1 RESOLUTION CHECK
1. Enter Diagnostics mode.
2. From the Main Menu, select NVM Config / enter
password [0734] / Resolution / press [3] or [7] for
reading.
Is the Resolution reading “D”?
Go to
Step 2. Replace the
Print Engine
Controller
Board
[RRP 8.5,
page 310 ].
2 LASER DENSITY CHECK
1. Enter Diagnostics mode.
2. From the Main Menu, select NVM Config / enter
password [0734] / Laser Density / press [3] or [7] for
reading.
Is the Laser Density reading “4”?
Go to
Step 3. Replace the
Print Engine
Controller
Board
[RRP 8.5,
page 310 ].
3 SCANNER MOTOR CHECK
1. Enter Diagnostics mode.
2. From the Main Menu, select Component Test / ROS
Motor / press [4] to start the Laser Scanner Motor, [0]
to stop.
Can you hear the Laser Scanner Motor spin up?
Go to
Step 4. Go to
RAP 48,
page 130 .
4 VOLTAGE CHECK 1
1. Switch the printer power OFF.
2. Remove the Left Side Cover [RRP 1.1, page 250 ].
3. Remove the Print Engine Controller Board Cover
[RRP 8.5, page 310 ].
4. Disconnect P/J11 from the Print Engine Controller
Board.
5. Switch printer power ON.
6. Measure the voltage between P11-7 & P11-8 on the
Print Engine Controller Board.
Is this v5.0 VDC between P11-7 & P11-8?
Go to
RAP 27,
page 92 .
Go to
Step 5.
5 VOLTAGE CHECK 2
With the printer still on from Step 4, sub-step 5,
measure the voltage between P21-4 & P/H21-1 on the
Print Engine Controller Board.
Is this v5 VDC between P21-4 and
P/J21-1?
Go to
RAP 48,
page 130 .
Go to
RAP 40,
page 114 .