• Topic ID: id_17423035
  • Version: 4.0
  • Date: Jan 20, 2020 8:32:53 PM

Power Cable (CFHC - Heater Routing Assembly and Fuse Board)

Prerequisites

Overview

This procedure defines the necessary steps to Remove and Install the Power Cable (CFHC ↔ Heater Routing Assembly and Fuse Board).

1 Preparation

Procedure

  1. Move table to home position, fully out and down.
  2. Remove right side gantry cover.

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

  3. 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.
  4. Turn OFF the Axial Drive and HVDC switches on the gantry’s Service Switch Panel.
  5. Position the detector at 12 o'clock and lock gantry rotation.
  6. Turn OFF the 120 VAC switch on the gantry’s Service Switch Panel.
  7. Remove the gantry left side cover, top covers and front cover.

2 Replacement Procedure

Procedure

  1. Cut tie-wraps holding the cable to DAS assembly.
  2. Disconnect all cable connectors of the power cable, and remove the cable.
  3. Put the new power cable into place, and connect all cable connectors of it.
    4. Notice Image
    • notice
    • Be careful NOT to obstacle the air flow route to detector.
  4. Secure the power cable using tie-wraps.

    Figure 1. Power Cable Wiring

  5. Rotate the gantry by hand to ensure there is no interference between the power cable and stationary components.

3 Gantry Reassembly

Procedure

  1. Make sure the Axial Drive, HVDC and 120 VAC switches on the gantry’s Service Switch Panel are OFF.
  2. Release the gantry rotational lock and install gantry covers, all except the right side cover.

    Refer to Replacement → Gantry → Enclosure → (Cover Removal Procedures).

  3. Turn on the 120 VAC, HVDC and Axial drive service switches.
  4. Install gantry right side cover.

4 Finalization

Procedure

  1. Perform a [Quality Assurance Test] from the [Functional Checks] menu of the service manual to ensure system operation.