Xerox Phaser 3425 Service Manual - Lsu Error Or 0X5A

Error Messages and Codes

3-15

LSU Error or 0x5A

The printer’s front panel displays “Laser Failure”. The LSU has been removed, 

reseated, and locked into place. Any obstructions, media, or debris has been removed 

from the paper path. Printer power has been cycled and the error still appears.

Troubleshooting Reference 

Applicable Parts

Wiring and Plug/Jack Map References

LSU

"Print Engine Interconnect Diagram" on page 10-2

Print Engine Controller Board

Troubleshooting Procedure 

Steps

Actions and Questions

Yes

No

1

Check that the laser connectors are 

properly seated.

Go to Step 2.

Reseat the 

connectors.

2

Use the embedded diagnostics to check 

laser motor operation. Does the laser 

motor run?

Go to Step 3.

Replace LSU.

3

Does error recur?

Replace Main 

Board.

Complete