Tube Reguveination? or something else

[BC_Jeffro]

I got 2 WGK7000 monitors yesterday so i threw a test rig together and tested them one is all blue and the other is all green i have adjusted both and they are both missing colors
i caped one and no change at all

[lilshawn]

swap the neck boards, does the weird color follow the board?

if so, you have a bad transistor or amp on the neckboard and must replace it.

swap the transistors around, does the colors change?

if so, the transisor is bad

if not, the amp is bad LM1203? i belive.

[BC_Jeffro]

swapped neck boards and no change on either

[buffett]

re-flow the video input header.

check all the transistors in the color circuit.

two for each color on the main chassis near the video input header and one for each color on the neck board.

also check to see if the pots on the neck board are not broken.

i would get the tube checked just so you know if it needs any help or not.

and if all else fails i can repair them for you if you want to send them in.

check out my YouTube channel to see what it do.

https://www.youtube.com/user/buffett1978?feature=mhee

Peace
Buffett

[lilshawn]

when you say no change when you swap the neck boards

do you mean:

you swapped the "green looking" board to the other monitor and it's still "green looking"

or

you swapped the "green looking" board to the other monitor and it's now "blue looking"

[BC_Jeffro]

the green tube stayed  green and the blue tube blue

[buffett]

you may need to get the tubes checked.
this sounds like some of the guns are shorted.

or possibly the neck transistors may be bad.

swap each chassis to the opposite tube and check that as well.

this will help tell us if it could be a tube problem or a chassis problem.


either way the chassis need a rebuild.

cap kit. flyback and re-flow of the chassis and neck board.

Peace
Buffett

[BC_Jeffro]

i swaped chassis and the color did not change on the tube the geen stayed green...

[lilshawn]

i would say the gun is toast. if you have some repair places near you call a few of them up and ask if they have a tube tester.

you may rejuvenate it, but be warned, rejuvenation may last a year, a month, a day, an hour. it's completely random. it may last forever.

[buffett]

try a rejuve first if you can find a shop or local collector that has a tester.

i rejuve allot of tubes with great success.

Peace
Buffett