Main > Monitor/Video Forum
TATUNG VT19726Z No Blue
smartbomb2084:
Hey all,
I have this monitor in an upright Megatouch cabinet and the picture is missing blue completely.
I have +75 VDC on all three of the output pins of the video amp an LM2439T. I have the same voltages on all three color channels at the amp's inputs as well. I even swapped out this amp as a shotgun repair attempt.
I also swapped the red input with the blue input and the red is now where blue would be in the picture but there is still no blue where the red would be in the picture.
Is it possible my tube is toast?
I cannot find a schematic for this monitor either... Anybody have one they can share?
THANKS
lilshawn:
sounds like a gun problem.
you really need to hook up a tube tester like the B&K 470 and see if there is any measurable emissions at all from the gun. if not you may have a short inside. (which can be removed with the 470)
have you tried drving the blue gun directly with the red drive (sometimes you can jump it) if there is nothing at all i'm inclined to believe a tube fault.
smartbomb2084:
Sorry this took so long...
I scored a B+K 470 off of Ebay and , of course, it doesn't have the correct adaptor I need..
Does anyone know the correct adaptor number needed that fits these more modern MEGATOUCH Tubes?
THANKS
lilshawn:
90% of modern tubes are CR23
sometimes you will find a dual focus variant of the CR23 (not sure what the number is for that one)
key posted a link a while back...maybe you can get one from there.
http://forum.arcadecontrols.com/index.php/topic,122847.0.html
smartbomb2084:
THANKS man I appreciate that. Can't wait to get one and try it.
:cheers: :cheers: :cheers: