Service Manual for Ball TV-90 monitor?

[Dave McGuire]

On Jun 20, 2009, at 1:13 AM, Josh Dersch wrote:
> Decided to dig out my IBM 5120 and try to get its monitor working,  
> at long last.  It's a Ball TV-90.  Anyone out there have the  
> service manual for this?  (Worst case, there's a copy on eBay right  
> now, but before I go through that I thought I'd bug you guys...)
>
> I mentioned this issue a few years ago, here's a photo of the  
> interesting distortion I'm getting: http://yahozna.dyndns.org/ 
> scratch/5120disp.jpg.  Thus far I've done a complete cap kit with  
> no effect.  I hate working on monitors, but I really want to get  
> this running again...

   Wow that's a bizarre distortion.  I'd love to see the horizontal  
drive waveform on an oscilloscope.  It almost looks like it might be  
some sort of zero-crossing distortion in an amplifier.

            -Dave

-- 
Dave McGuire
Port Charlotte, FL