[Darren Wadsworth]

Trying to adjust this JVC 61z786 for grayscale with colorimeter. Only one set of controls are listed in service menu as:

r-drive

g-drive

b-drive


I know that normally when adjusting for GS there are 2 sets of controls. One for high end and one for low end.


When using this at 80% gray window and setting the x and y throws off the rest of the scale badly.


Is this normal to have only one set of controls? Or are we missing a service menu item?


If there is suppopsed to be only one set, then how do i properly set the grayscale?


Thank you


Darren

 

[Michael TLV]

Greetings


When dealing with one set of controls ... you compromise and use something like 50% to see how that works out. If not good enough ... try 40% ... 30% ...


It's a best fit design.


regards

 

[Darren Wadsworth]

So, this set really only has one set of controls?


Darren

 

[Michael TLV]

yes.


unless you know how to access the engineering menu of the TV. Which no one outside jvc normally knows.


not in a service manual.


regards

 

[hifiaudio2]

I was about to start a calibration on this very set. How do you get into the service menu?


and does anyone know if there has ever been a firmware update for it?