Answer: "Hard calibration" is a form of hardware calibration that fine tunes the color and brightness for specific LED modules on the DVLED Display. 

Situations in which hard calibration may be required:

• LED Module position is changed or LED Module is replaced with a spare,
• LED Modules from a different color batch need to be used,
• LED Modules on the display have been used for a long time (>1 years) and need to be replaced with spare LED Modules

Please be aware that equipment like a professional camera will be needed for this process. Hard Calibration should only be done by trained professionals. Trained professionals may contact LD BU for the full Hard Calibration Training procedures.

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Not to be confused with "How do I calibrate overall brightness on my DVLED Display?"