Check SP 2119-001, 002 and 003. The should be 0. If not see "Recovery procedure for no replacement preparation of laser unit" in the service manual.

The biggest problem with no birth certificate is setting the laser unit. These are:
  • SP2-101-001 to -004: Color Registration: Main Scan for each color
  • SP2-101-013 to -016: Color Registration: Sub Scan for each color
  • SP2-102-001, -003, -004, -006, -007, -009, -010, -012: Main Magnification for each color and line speed
  • SP2-104-001 to -004: :LD Initial Power Adjustment for each color

Each laser unit is different. New units come with a settings sheet that should be stored with the birth certificate for future reference.