Xerox 3450B - Phaser B/W Laser Printer, Service Manual, Page: 62 / 180

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