Wells Gardner CRT, need help!!

[michaelmann]

Hi guys, does any one out there know anything about the Wells Gardner D9600 model CRT. i have a number of them that have a distorted picture mostly with a shrunken picture size. i have tried with the monitor controls to change the picture size without any success. does anyone have any solutions or a service manual or any suggestions? any help will be greatly appreciated

[cowboygames]

Shrunken in what way? From the top and bottom or the sides or both?

[michaelmann]

in some cases both. but for most have shrunken from the top and bottom only leaving a few inches of picture in the middle

[cowboygames]

From top and bottom I would suspect a bad vertical circuit. That being a bad resistor, cap or diode within the circuit or a bad vertical out put. Google the vertical output number and see if you can find a diagram of the chips pinouts so you can check running voltages. As far as pinched in from the sides, that's a horizontal problem. Possibly a tube matched up to the wrong circuit board if both problems exist simultaneously.

[michaelmann]

thanks for your help. i will see what i can find on google

[Crowsen]

I looked for a while. I found a Guide for a 9300WG its almost the same. E-mail me if interested.

[channelmaniac]

Shrunken in all directions could be caps in the power supply section if that monitor has a switcher in it... or could be low B+ voltage.

Either case, I'd start by capping them then troubleshooting them further. You'd be surprised at all the problems that can be solved by recapping monitors.

RJ