Daktronics

Diagnostic Event: PLR Loss of Sync Port B on GS6

Potential Symptoms

  • "Loss of Sync ProLink 6 Port B" event on last the PLR in the display signal chain (typically top PLR).
  • Potential poor image quality. A single loss of sync it not likely to cause visual problems for a display, but if multiple losses of sync occur in a ProLink6 circuit, all modules associated with the nodes between the points of failure may go blank.

Diagnostic Event(s)

  • Loss of Sync ProLink 6 Port B

Environment

  • Product Family: Message Displays
  • Product: System Health, IDM
  • Component: Large Matrix GS6
  • Control System: 
The PLR receives ProLink6 data on two ports - A and B. A loss of sync on one port will cause the PLR to switch to the other port. While a loss of sync itself is a non-visual event, it may be caused by the reset or failure of a ProLink6 node (PLR or VIP-4060) directly connected to the PLR, and therefore may be an indirect indicator of a visual outage.

Cause

  • A persistent loss of sync on a ProLink6 circuit indicates that data redundancy has been lost. Another loss of sync on the same circuit will result in a visual outage affecting all nodes between the two points of failure.
  • Fiber redundancy not used in this series display. (Large Matrix Gs6)

Resolution

  • This event is normal to have on this series display. (Large Matrix Gs6)
  • For displays using fiber redundancy: 
    • Look for events indicating that the ProLink6 node connected to Port B of the PLR experienced a reset or diagnostic failure, and use the display's webcam to determine if there are any visual issues occurring on the display. 
    • If no such events exist, inspect the fiber optic cable connection between the PLR and the ProLink6 node connected to port B of the PLR.

KB ID: DD3673999

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