• Topic ID: BJ_211202_B01
  • Version: 2.0
  • Date: Dec 22, 2021 11:22:19 PM

JEDI PPC Board Replacement

Prerequisites

Overview

This procedure defines the replacement process for Programmed kV Control Board. Please check the programmed kV control board type by following the below steps before replacement.

  1. Open a shell, type:

    rsh orp

    jediInfoShow

  2. JEDI info displays.
    • If jedi_sw_dsp_ver is 12.**-****, the kV control board is SoC board.
    • If jedi_sw_dsp_ver is not 12.**-****, for example: 10.**-**** or 11.**-****, the kV control board is PPC board.

    Figure 1. Example for SoC Control Board

  • If possible, save JEDI runtime parameters (from JEDI to console)

  • Replace PPC board

  • Restore JEDI runtime parameters, if previously saved

  • Check functionality of systems

  • Recalibrate

1 PPC/SoC Board Removal

Procedure

  1. If possible, save JEDI runtime parameters (from JEDI to console).
    • warning
    • Potential for Shock.
    • Voltage may be present.
    • Use proper lockout/tagout procedures before replacing components.
  2. Remove power to the gantry using proper Lockout / Tagout procedures.
  3. Remove gantry right side cover.
  4. Turn OFF all the three switches (AXIAL DRIVE ENABLE, HVDC ENABLE, 120 VAC) on the Service Switch Panel.
  5. Position the inverter assembly at 2 o'clock.
    6. Notice Image
    • notice
    • Do not drop screws into inverter. If you do, they must be removed or damage to the inverter will occur.
  6. Remove largest inverter cover.
  7. Attach a protective ESD wrist strap.
  8. Disconnect wires and remove the PPC/SoC board.

2 PPC/SoC Board Installation

Procedure

  1. Continue using the ESD wrist strap.
  2. Insert new PPC/SoC board and re-connect all wires.
  3. Replace the hex screws.
  4. Replace inverter cover.