Blank cabinets of display;Receiver card failure

​Symptoms

  • All cabinets are blank after a receiver card ( if no redundant signal)
  • How to judge receiver card failure for J Series and L Series displays?

Environment

  • Product Family: Sender Box
  • Product: Nova MCTRL 660, MRV300Q,  NovaStar brand sender box and receiver  cards
  • Components: NovaLCT-Mars
  • Control System: Gold family or NPP Control using transmit common/open protocol, includes but not limited to DVN-4003, J Series, U Series, Q Series​

Cause

1. If one RC card is fails, it will lead to all cabinets are blank after this RC( if no redundant signal).

RC failure.jpg 

You can use the NovaStar software (pictured above) to identify receiver cards not communicating the sending box/card.  Send configuration parameters to each receiver card.   If are not able to send the parameters to the receiver card, you will know that the receiver card is not communicating.

Resolution

  1. Make sure power is going to the card
    • The cards in the cabinet should have a solid red light and a green flashing light. 
  2. Check the cat 6 cable from the sending card to the receiver card. Swap this out for a new cable if necessary.
  3. Replace the receiver card with a new one and cycle power to the entire display.
    • After replacing a receiver card, if the section is blank, try sending receiver card configuration to the specific receiver card instead of sending it to all.
      • Reference "DD3242867, How to Configure a Sender Box " for instructions on how to load and send the receiver card configuration file.  It may take some time for the new receiver card to read the config from the sending box.  Switch the display to test pattern and then back to normal content to force it to take the new config data faster.
    • If the recently replaced section still appears blank, or bright white, it might be because the new receiver card has not read the dimming values yet.  Switch the display to test pattern and then back to normal content to force it to quickly read the correct dimming levels. 

RC card.jpg 

Related Resources

How to judge receiver card failure NovaStar controlled display?

Daktronics L Series Displays- Removal and Installation of an L Series Receiver and Hub Card

Daktronics J Series Displays- J10 Replacing a Hub and Receiver Card​

How to judge a HUB board failure ?

How do I replace a receiver card in a DVN-4003 display?

KB ID: DD3345185


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