V-4 - Video mixer V4 transitions problem - for example dissolve from A to B shows bright colors from A even after lever full way down to B. Is it because of any adjustments required. May 01, 2023 06:42 Updated Follow It is possible that your T-Bar is not calibrated correctly. Please see Page 66 of the V-4 Owner's Manual for details. Related articles V-4EX: Troubleshooting USB Video and Audio Output V-4 - Is it possible to turn the T handle 90 degrees?