Re: VECTOR: Need Help with Electrohome G05 XY monitor

Would the B+ (I'm not sure what the "EHT" is) help this?  I have several of
these monitors myself and would love to find someone that can help me fix
them.

Scottt C.

Matt Rossiter wrote:

> This is kind of an interesting question.  I have two working 15" 
> Electrohome G05 monitors from Asteroids Cocktail games.  One of them 
> had a pretty bad tube so I decided to buy a replacement  from Hawkeye 
> Picture tubes.  It works great except with this tube I can't get the 
> brightness to come down enough.  After it warms up, I can start to see 
> a dot in the middle with retrace lines.  Even when I have both the 
> contrast and brightness all the way down I still get a picture.  I've 
> already determined it's not the EHT or the deflection board because 
> they work fine with the older picture tube.  The voltages are all 
> correct too.
>  
> So, my question is, is there a good way to modify the circuit so the 
> brightness voltage (G1 ?)  isn't so high?  Perhaps change the value of 
> R516 or R518?
>  
> http://www.arcadehelp.com/manual/monitor/electrohome/G05-802.pdf
>  
> Thanks
>  
> Matt