• Topic ID: id_16157516
  • Version: 4.0
  • Date: Jan 20, 2020 8:33:25 PM

Gantry Tilt/Fan Relay (GTFR) Board Replacement

Prerequisites

Overview

Procedure

  1. Remove gantry covers as required.

    Refer to Parts Replacement > Gantry > Enclosure > (Cover Removal Procedure).

  2. Stop the rotor of X-ray tube in case of Liquid Bearing Tube before HVDC off. Refer to Liquid Bearing Tube Rotor stop procedure for details.
    3. Notice Image
    • notice
    • Always turn OFF the HVDC before the 120 VAC. Turning OFF 120 VAC power before HVDC power can result in equipment damage.
  3. Turn off the three (3) main power switches (Axial Drive, HVDC, 120VAC) on the Service Switch Panel.
  4. Tilt gantry back 20 degrees.
    5. Notice Image
    • notice
    • Wear a grounded wrist strap when you handle a circuit board.
  5. Remove the three (3) nuts that fasten the plastic cover to the GTFR Board.

    Figure 1. GTFR Board

  6. Remove J1 and the three *3( other connectors.
  7. Loosen 16 screws to release the GTFR board.
  8. Install new GTFR board and reassemble gantry.

Finalization

  1. Perform a Tilt Functional Test.