• Topic ID: id_12373650
  • Version: 1.2
  • Date: Jul 5, 2019 6:08:29 PM

In-Room Display (IRD) Troubleshooting

IRD monitor video is supplied by the host PC to a DVI-D connection on an IRDC module inside the GOC. The IRD controller module, also called the IRD fiber optic converter, converts the video to a fiber optic light signal and then sends it over the dual fiber optic cable to be displayed on the IRD monitor display.

Inside the magnet room, data from the operator control panel (enclosure trackball) is routed by USB to the IRD monitor where it is converted to fiber light signals and sent over the dual fiber optic cable to the IRDC module. The IRDC module converts the trackball signals and sends them to the USB connection on the host PC.

1-wire diagnostic information from the IRD monitor and trackballs (which includes trackball USB cable detect, IRD monitor power “good” detect, and dual fiber cable signal “good” detect) is communicated on the copper power cable connection between the IRD monitor J1 and PHPS J42. The PC host receives this information from the USB/serial converter inside the GOC that supports 1-wire network communication from the PHPS. Using this alternate communication path permits IRD hardware status information to still be received by the host PC even if the dual fiber optic cable communication is interrupted because the fiber optic cable is disconnected or connected backwards (that is, normal connection is Tx-Rx or light into dark).

Figure 1. IRD Block Diagram

IRD controller modules are supplied by two vendors: Barco and USEI. The modules look identical. The same keypads function with either module. During operation, cables are connected to J5 and J4. Both are for 1-wire communication. J5 is the sensor input, and J4 is the output to the host PC and PHPS2.

The IRD controller module has several LEDs that provide status information, and can be used for troubleshooting.

Figure 2. IRD Controller LEDs

1 USB Status LED This LED has 2 states: green and dark. Green indicates proper USB communication between IRD module and IRD monitor over dual fiber optic link. This LED does not indicate the condition of USB communication between the IRD monitor and trackball assemblies, or the host PC and IRD module.
2 Link Status LED This LED has 3 states: steady green, pulsating green (USEI unit only), and dark (Barco unit only). Steady green indicates proper communication between the IRD module and IRD monitor over dual fiber optic cable. Dark LED (Barco IRD module) or pulsating green LED (USEI IRD module) indicates a failure.
3 DVI Status LED This LED has 3 states: green, red, and dark. Green LED indicates that the video cable is attached between the host PC and IRD module and video is present from the host PC. Red LED indicates the video cable is attached between the host PC and IRD module, but video is not active from the host PC. Dark LED and green Power LED indicates that the video cable is not connected between the host PC and IRD module.
4 Power LED This LED has two states: green and dark. Green LED indicates that AC power is present at the IRD module.

The IRD troubleshooting matrix below presents IRD controller LED statuses and possible problems, as well as troubleshooting actions.

Some troubleshooting actions refer to information in In-Room Display Diagnostics.

Table 1 IRD Troubleshooting Matrix
IRD Module LEDs Problem Actions
USB Status Link Status DVI Status Power
Green Steady green Green Green No video on IRD monitor.

  1. Closely inspect the IRD monitor display face, and confirm that the backlight is good. If the backlight has failed, replace the IRD monitor.

  2. On the In-Room Display Diagnostics screen, verify that both trackballs are detected. If any are undetected, check the cabling between the undetected trackballs and the IRD monitor.
Green Steady green Green Green Cannot control cursor on IRD monitor. A single failed operator control panel (OCP) can disable operation for both sides. OCP trackball assemblies are right and left side specific. Order OCPs for both sides. Install the right side OCP, and check operation. If the problem continues, reinstall the old unit in the right enclosure, install the new left side OCP, and check operation. Return the unused OCP.
Green Steady green Green Green IRD monitor makes loud humming noise.

  1. Replace the IRD monitor.

  2. Replace the “octopus” cable on the front of the magnet that interconnects the IRD monitor and trackball assemblies.
Green Steady green Green Green IRD monitor video too large for display area.

  1. Reboot and log in as root.

    note:

    It is possible that the customer changed the default password. If you cannot log in, contact the customer for the correct password.

  2. In Guided Install > IRM Installation, uninstall the IRM software and wait for the prompt.

  3. Save and exit Guided Install. Open a C shell window, and enter reboot.

  4. Log in as root. In Guided Install > IRM Installation, install the IRM software and wait for the prompt.

    note:

    It is possible that the customer changed the default password. If you cannot log in, contact the customer for the correct password.

  5. Save and exit Guided Install. Open a C shell window, and enter reboot. Boot the applications software.

  6. If the problem persists, replace the IRD module inside the GOC with a new module from the same vendor (Barco for Barco, USEI for USEI).
Green Steady green Green Green IRD monitor is displaying video meant for host PC monitor. The monitor video cables are connected to the wrong DVI‐D connectors at the rear of the host PC. Swap the monitor cable connections.
Green Steady green Dark Green Host PC DVI video cable is not attached to IRD module.

  1. Reconnect each end of the DVI video cable. Confirm power to the IRD module and IRD monitor. Reboot the host PC.

  2. Reseat the internal host PC DVI graphics card.

  3. Swap the IRD module and host PC monitor cables on the rear of the host PC and observe that the DVI Status LED changes to red or green.

    • If the LED changes, the host PC IRD video card port servicing the IRD module may be faulty.

    • If the LED does not change, return the cables to normal positions. Then, disconnect the DVI cable from the host monitor, and reroute it to connect to the IRM module. If the LED state changes, replace the IRD module DVI cable. If the LED state is still unchanged, replace the IRD module.
Green Steady green Red or orange Green Host PC DVI video cable is attached, but video is not present at IRD module from host PC.

Video is missing if the Host PC did not detect the IRD module, monitor, or trackballs during software boot.

Or, video is missing if the IRD software was never installed during installation or after reload.

  1. Confirm successful installation of the IRD software from Guided Install > IRM Installation. If option is not selectable then proceed to Config File Manager tool, enter MRconfig and locate “Is IRM installed or not?” and confirm set to “Yes”.

  2. On the In-Room Display Diagnostics screen, check that all trackballs are detected. Both trackballs must be detected for the host to display IRM video.

  3. If In-Room Display Diagnostics screen is not available then open a cshell, login as root user, and type:

    • cd /dev/input

    • ls-la

    Confirm you see tmouse1 -> mouse2 and tmouse2 -> mouse3 in display output. Each entry corresponds to one enclosure trackball/keypad. Both must be present to install IRM. Both must be present to permit Host PC to display video or IRD monitor.

    note:

    It is possible that the customer changed the default password. If you cannot log in, contact the customer for the correct password.

  4. Reboot the host PC.
Dark Dark Dark Dark IRD hardware power failure.

  1. Verify that the IRD module power switch is in the ON position.

  2. Verify that the IRD module power cord is connected.

  3. Verify that the IRD module AC power fuse (behind the panel next to the power switch) is not open.
Dark Steady green N/A Green USB communication from IRD module to IRD monitor failed.

  1. Confirm that the system is not in E‐Stop.

  2. Do all of these actions in order:

    1. Turn OFF the power switch on the front of the PHPS.

    2. Reseat the copper cable at the top of the IRD monitor.

    3. Reseat the copper cable at J2 on the magnet I/O panel (on the side of the magnet opposite the shield cooler).

    4. Reseat the copper cable at J42 on the PEN panel.

  3. Turn ON the power switch on the front of the PHPS. On the IRD Diagnostics screen, perform Reset IRD Console. Within several seconds, video should appear on the IRD monitor display.

  4. Reboot the host PC.

  5. If the problem persists, order both the IRD module and the IRD monitor and replace one at a time.
Dark Blinking green N/A Green Communication is broken between USEI IRD module and USEI IRD monitor on dual fiber optic cable.

  1. Check whether the dual fiber optic cable is disconnected somewhere.

  2. If the dual fiber optic cable is connected, check whether it is in the wrong orientation (Rx‐Rx, Tx‐Tx). The Tx LED on each component should glow dim red.

  3. Check whether the IRD monitor has a power loss (for example, the system is in E‐Stop, the PHPS power switch is OFF, or the PEN cabinet power is OFF).

  4. Confirm that the IRD monitor and IRD module are made by the same vendor (USEI). IRD components from different vendors, if connected together, will not communicate.
Dark Dark N/A Green Communication is broken between Barco IRD module and Barco IRD monitor on dual fiber optic cable.

  1. Check whether the dual fiber optic cable is disconnected somewhere.

  2. If the dual fiber optic cable is connected, check whether it is in the wrong orientation (Rx‐Rx, Tx‐Tx). The Tx LED on each component should glow dim red.

  3. Check whether the IRD monitor has a power loss (for example, the system is in E‐Stop, the PHPS power switch is OFF, or the PEN cabinet power is OFF).

  4. Confirm that the IRD monitor and IRD module are made by the same vendor (Barco). IRD components from different vendors, if connected together, will not communicate.