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

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. Ensure to download the correct version of NovaLCT software prior to completing the below steps.

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.

Reload calibration data from module to receiver cards

For all 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. Spare modules usually have calibration data stored, if there is a blank module, may need to complete these steps below. 
Step 1: Enable Calibration Effect 

After the display is lit up and can show content, complete the following steps to enable calibration effect and save.

1. On the NovaLCT home page, click Calibration.  

2. Select the Manage Coefficients tab, then click Module Flash.
 

3. On the bottom right of the Screen Calibration window, click View Module Calibration Coefficients, then check the calibration effect. 

4. Click Save Calibration Coefficients to Receiver Cards. 

5. On bottom left on the window, under Enable/ Disable Calibration, select the Chroma Calibration toggle button.  

6. Click Save to HW. 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. 
If a receiver card is replaced or upon FTFU, not only is the update for the calibration data needed but also uploading its image booster files. Complete the steps below for this process for displays pixel sizes 1.2/1.5/1.8; if sub-zero pixel pitch steps vary; contact Daktronics.

UPLOADING IMAGE BOOSTER FILES

Image booster (.vglcx) is a standard file for NPN-4600 products for better grayscale performance. For each project, if this file was not provided to you, please 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. It’s recommended to check that image booster switch is on at the end of commissioning.

Step 2a: In NovaLCT home page, click Image Booster Engine.
If a new receiver card is installed, the image booster file needs to be imported. Follow Step 2b for that process. 

Click Calibrate in NovaLCT software.

1. Click Import Quality Adjustment File. Select the file and import it.
   
   
2. Under the Magic Gray setting, ensure the toggle switch is enabled and the 22bit+ and Precise Grayscale check boxes are selected. Please be advised, this is a vital step.
3. Click Send.
4. Save to HW.
5. Save.
6. Close the Image Booster Engine by selecting the X in the upper right corner.

Step 2b:

Import and Enable Image Booster File If a new receiver card was installed, the image booster file needs to be imported.