Field Service: NPN-4600 COB products Commissioning and Service procedure

Topic

Introduce the commission and service procedure for NPN-4600 COB products.

When First Time Fire Up, Technical Support may need to upload the calibration data to the receiver cards.

 

When replacing receiver cards, Technical Support may need to upload the calibration data to the receiver cards.  

 

Environment

  • Product: Daktronics NPN-4600 COB
  • Component: NovaStar Sending Box, 
  • Control System: NovaLCT

Steps

How to read calibration data from modules and then upload it to receiver cards:

Preparations:

Important:

Select the NovaLCT for the job:

Currently for NPN-4600 COB products, NovaLCT 5.4.4.3 and NovaLCT 5.5.0.D3.CTM0400 are used throughout. Contact Daktronics Helpdesk to acquire the installer.

Determine which version of LCT to use by the suffix of the configuration file name corresponding to the project.

LCT5.5.0D3  -> LCT 5.5.0.D3.CTM0400

LCT5.4.4.3  -> LCT 5.4.4.3

Find configuration files and firmware of the receiver cards, these will be provided to you or you will need to contact Daktronics Technical support for the files.

After powering up the COB display, there is typically no need to touch configuration files and firmware. If it is believed that configuration files and/or firmware that has caused problems, or a new receiver card is installed, contact Daktronics Helpdesk for these files.

Commission steps:

For NPN-4600 COB displays, there are calibration data (also called Coefficients) saved on modules. When we install the display, we need to read calibration data from modules and upload data to the receiver cards. 

 

1.Reload calibration data from module to receiver cards

  1. In NovaLCT home page, click Calibration – Manage Coefficients – Module Flash.

              A screenshot of a computer Description automatically generated
 

    1. On bottom right, click View Module Calibration Coefficients, and check the calibration effect.
    2. Click Save Coefficients to Receiver Cards – Save to HW.
    3. On bottom left, enable Chroma Calibration – Save.
    4. Each time a module or a receiver card is replaced, repeat the steps above.


This concludes the steps to read calibration data from modules and then upload it to receiver cards. 
Spare modules usually have calibration data stored, if there is a blank module, check following section. 
If a receiver card is replaced, not only need to update the calibration data but also need to upload its image booster files. See section Upload image booster files.


2 Upload image booster files:

Image booster (.vglcx) is a standard file for NPN-4600 products for better grayscale performance. For each project, this file will be provided to you or you will have to contact Daktronics Technical support for the file.

Whenever the calibration is disabled and then enabled, image booster needs to switch on again for it to take effect (this will be solved in the higher version of NovaLCT).

It’s recommended to check that image booster switch is on at the end of commissioning.

In NovaLCT home page, click Image Booster Engine.

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If a new receiver card is installed, the image booster file needs to be imported.
  1. At the bottom right, click Calibrate.
  2. Click Import Quality Adjustment File. Select the file and import it.
  3. After importing, switch on Precise Grayscale and 22bit+. Please be advised, this is a vital step.
  4. Close the Image Booster Engine.
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