Table 52 Error Code U2: Laser (Ros (Laser Scanner)) Failure; Rap 31 Error Code U2: Laser Failure Power Off / On; Rap 27 - Xerox 5400N - Phaser B/W Laser Printer Service Quick Reference Manual

RAP 31 Error Code U2:
There is a problem with the Laser Assembly.
Table 52 Error Code U2: Laser (ROS (Laser Scanner)) Failure
Troubleshooting Procedure
Step Actions and Questions
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"?
LASER DENSITY CHECK
2
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"?
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?
4 VOLTAGE CHECK 1
1. Switch the printer power OFF.
2. Remove the Left Side Cover [RRP 1.1,
3. Remove the Print Engine Controller Board Cover
[RRP 8.5,
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 voltage +5.0 VDC between P11-7 & P11-8?
VOLTAGE CHECK 2
5
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 voltage +5 VDC between P21-4 and
P/J21-1?
98
page 310].
Laser Failure
Power Off / On
Yes
Go to
Step 2.
Go to
Step 3.
Go to
Step 4.
Go to

RAP 27,

page
page 250].
Go to
RAP 48,
page
Phaser 5400 Laser Printer Service Guide
No
Replace the
Print Engine
Controller
Board
[RRP 8.5,
page 310].
Replace the
Print Engine
Controller
Board
[RRP 8.5,
page 310].
Go to
RAP 48,
page 130.
Go to
Step 5.
92.
Go to
RAP 40,
130. page 114.