• Topic ID: id_16157638
  • Version: 1.0
  • Date: Jul 7, 2018 4:41:52 PM

ORP Replacement

Prerequisites

Overview

This document provides the necessary steps to replace and configure the Onboard Rotation Processor Unit (ORP) for imaging.

1 ORP Assembly Removal

Procedure

  1. Verify ORP type.
    1. Open a shell
    2. Type: rlogin orp.
    3. Type: d 0x10000000
    4. The content of 0x10000000 to 0x1000000B is for ORP/SCORP/ORPSV board.
    5. If the content is 5437621, the board is ORPSV, others are SCORP.
  2. Move table to home position.
  3. Remove gantry right side cover.
  4. Turn off [HVDC ENABLE], [AXIAL DRIVE ENABLE] and [120 VAC ENABLE] switches on Service Switch panel.
  5. Remove power to system. See Equipment Service - Lockout-Tagout-PPE from Safety section.
  6. Remove scan window, gantry left side cover, gantry top covers and gantry front cover.
  7. Rotate gantry such that ORP assembly is in 2 o'clock position.
  8. Engage rotational lock.
  9. Detach and remove cable clamps from top of ORP Assembly with a 3mm Allen Wrench.
  10. Cut tie-wraps holding cables to the ORP box.

    Figure 1. ORP Assembly

  11. Disconnect four front cables and one rear cable from ORP Assembly.
  12. Open the ORP box cover by loosening its four screws.
  13. Remove the ORP board from the box by unscrewing screws and studs.

    Figure 2. ORP Board Removal

2 ORP Assembly Installation

Procedure

  1. Get the new ORP board and install it to the ORP box by screwing its four M4 screws and one M3 screw.
  2. Install four studs to the ORP board. (See Figure 2)
  3. Secure the ORP box cover.
  4. Reconnect four front cables and one rear cable to ORP Assembly.
  5. Attach cable clamps and tie-wraps to re-tie cables to ORP box cover.
  6. Disengage rotational lock.
  7. Restore power to system. See Equipment Service - Lockout-Tagout-PPE from Safety section.
  8. From Console Unix Shell prompt, type touch /usr/g/fw/orpFtp and press ENTER.
  9. Turn on 120 VAC ENABLE, AXIAL DRIVE ENABLE, and HVDC ENABLE switches on Service Switch Panel.
  10. Press ESTOP RESET on Service Switch panel and wait until scan hardware is reset.

3 Setup, Checks, Alignments, and Calibrations

Procedure

  1. FLASH Download
  2. Turn off [HVDC ENABLE], [AXIAL DRIVE ENABLE] and [120 VAC ENABLE] switches on Service Switch panel.
  3. Install gantry front, top and left side covers and scan window.
  4. Turn on 120 VAC ENABLE, AXIAL DRIVE ENABLE, and HVDC ENABLE switches on Service Switch Panel.
  5. Press ESTOP RESET on Service Switch panel and wait until scan hardware is reset.
  6. Install gantry right side cover.