• Topic ID: id_17479547
  • Version: 1.0
  • Date: Aug 28, 2018 3:55:39 PM

DoD57 DAS PS Assembly Replacement

Prerequisites

Overview

This procedure defines the steps necessary to replace the DoD57 DAS PS assembly.

Figure 1. DAS PS ASM

Procedure

  1. Move the table cradle to the home position, and position the table to its lowest elevation.
  2. Remove the gantry right side cover and disable “Axial Drive”, “HVDC” and “120VAC” switches from the service switch panel.
  3. Remove the gantry left side, top and front covers, refer to Replacement > Gantry > Enclosure > Cover Removal Procedure.
  4. Switch ON “120VAC”, press Reset push button on the bottom right of the service switch panel.
  5. Position the DAS at the 12 o’clock position, and lock the gantry in position using the rotational lock.
  6. Switch OFF “120VAC”.
  7. Disconnect all cable connectors from the fuse board and power supply.

    Figure 2. Disconnect the Cable Connectors

  8. Disassemble the power supplier assembly from the gantry frame by unscrewing four M8 mounting bolts, then put it on an ESD pad..

    Figure 3. DAS PS Assembly Removal

  9. Get the new DAS PS assembly and slide into place.
  10. Secure the DAS PS assembly to the gantry frame by using four M8 screws. (Torque: 19.2N-m)
  11. Reconnect all cable connectors to the fuse board and power supply.
  12. Disengage the rotational lock.
  13. Turn ON “Axial Drive”, “HVDC” and “120VAC” switches.
  14. Perform functional check by referring to DAS 48V Power Supply Checks.
  15. Restore the gantry to original configuration.

Finalization

  1. Perform a System Scanning Test from the Functional Checks menu of the service manual to ensure system operation.