1. Remove the rear cover.
  2. The CGB (Charge Grid Bias) power pack is located at the rear edge of the machine.
  3. Disconnect:
    [A] Top of the bracket (x2)
    [B] Bottom of the bracket (x3,x3)
  4. Pull the bracket (with board attached) partially out of the machine.
  5. Disconnect the board (x6,x4).
  6. Separate board from bracket (x4).