Using the 3/32 Allen wrench (provided in tool kit at time of delivery), remove the five screws which secure the front panel of the DeSa monochromator, then remove the front panel.

Remove 4 screws. |

Remove front panel. |
| The mono card assembly is mounted on the inside of the left panel of the DeSa monochromator (the side on which the ScanDisk is located). There are 5 white nylon hex nuts holding the mono card to the mounting plate. Using a 1/4" nut driver, remove the five hex nuts. |

Locate mono card |

Remove hexnuts |
| Carefully remove the mono card, noting that it is still connected via cables to the monochromator. Locate and grasp the wavelength motor cable connector on the mono card. |

Carefully remove mono card. |

Grasp wavelength motor connector. |
| Remove the connector from the mono card by wiggling the connector from side to side while gently pulling out as shown below. |

Carefully remove mono card. |

Grasp wavelength motor connector. |
| Using the 1/8" Allen wrench, remove the two screws which secure the mono card mounting plate from the monochromator. Remove the mounting plate. |

Remove screws. |

Remove mounting plate. |