To prevent electrical shock caused by residual voltage, never touch the areas outlined in red on the front [A] and back side [B] of the board.

Residual charge of about 100 to 400V remains in the AC circuits on the PSU board for several months, even after the machine has been turned off and disconnected from the power source, or after the board has been removed from the machine.

The procedure to discharge residual voltage from the boards by unplugging the power cord from the power source and pressing the main power switch works only for the DC circuits. Residual charge remains in the AC circuits.

  1. Open the controller box. (Opening the Controller Box)
  2. Disconnect the fan (x1, x1)

  3. Remove the cover (x4).

    PSU-C has no mounting bracket. It is mounted directly to the frame of the controller box. Remove the board from the frame.

  4. Disconnect the board (x5).
  5. Remove the board (x8).
  6. Lay the board on a flat, clean surface.