• Topic ID: id_15460870
  • Version: 2.0
  • Date: Nov 8, 2018 1:38:32 AM

JEDI PPC Board Replacement

Prerequisites

Overview

To replace JEDI PPC board:

  • Save JEDI runtime parameters, if possible

  • Replace PPC board

  • Restore JEDI runtime parameters, if previously saved

  • Check functionality of systems

  • Recalibrate

1 PPC Board Removal

Procedure

  1. If possible, save JEDI runtime parameters by clicking the SAVE RUNTIME PARAMETERS button of the GENERATOR TOOL found in the DIAGNOSTICS tab of the Common Service Desktop.
    • 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.
  9. Remove hex screws (7), and remove the PPC board.

2 PPC Board Installation

Procedure

  1. Continue using the ESD wrist strap.
  2. Insert new PPC board and re-connect all wires.
  3. Replace the hex screws (7).
  4. Replace inverter cover.

3 Finalization

Procedure

  1. Ensure that proper torque specifications (see Torque Wrench Information) are followed for all fasteners.
  2. Perform Flash Download Tool to synchronize PPC firmware with Console software.
  3. Restore JEDI Runtime Parameters if you saved JEDI Runtime Parameters prior to replacing the PPC board.
  4. Meter Verification.
    note:

    (For GE Healthcare Personnel Only) For supported software releases, perform High Voltage Tank Feedback Resistor Verification (Restricted) and Internal Scan Timer Verification (Restricted) procedures instead of High Voltage Tank Feedback Resistor Verification procedure.

  5. HV Tank Feedback Resistor Verification
  6. Filament Calibration.