Re: Tempest Troubles...

So I take it that this was a tough question...

Al Warner wrote:

> Hey Everyone,
>
> I have been trying to restore a Tempest for a friend of mine and I've
> hit a barrier. I have 2 boardsets. One was described as working and
> the other was dead. The machine that one set of the boards were in
> must have spent some time outside because the cabinet looked it. I
> took the monitor and wiring out and put it into a nicer cabinet. The
> monitor was capped with a Zanen kit and tested fine in my Tempest.
>
> I hooked up the first PCB set and it ran but there were math board
> problems (missing things, etc). Then I hooked up the second board set
> and it smoked the Low Voltage. I replaced the Low Voltage section
> with an LV-2000 (older kit type) and it was good to go. I tested it
> with the first boardset and it looked like before. Then I moved the
> smaller board from the other set to the "Mostly Working" set and it
> came up and looked fine.
>
> I left it running for 15 minutes and brought my Wife down to see it.
> While we were watching it, the vectors turned to blobs on the screen
> and the spot killer started kicking off and on. I moved the monitor
> over to my working Tempest and it was fine.
>
> Now I'm back to the board that blew out the monitor. I looked at the
> pots to adjust the monitor and one of them (the Y-LIN) was missing the
> adjustment knob. The part that is soldered to the PCB is still there,
> but the part you turn is missing. Could this have been what blew out
> the LV on the monitor?
>
> I don't have an Oscilloscope, is there a way to test whether the the
> board would damage the monitor again?
>
> Thanks,
>
> -Al-
>

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