On May 18, 9:37 am, Todd <studiobass...@[EMAIL PROTECTED]
> wrote:
> On May 18, 8:35 am, Bubba <Kgr...@[EMAIL PROTECTED]
> wrote:
>
>
>
> > I was working on this headache awhile ago, and finally had to walk
> > away from it to get some other projects done. Did Tempest have a
> > cooling fan in the cabinet by any chance? My monitor is overheating
> > and the spot killer comes on after about 10 min.. I had the game on
> > the other night, and without the glass and the back door on the
> > cabinet, I played for about 2 hours without trouble. Last night
> > figuring I fixed it, started to put it back together and now it over
> > heats.
>
> > So far...
>
> > I've had the game board rebuilt
> > New Big Blue
> > Reb. ARII board
> > New Bridge Rectifier
> > Rebuilt the monitor with Bobs Deluxe kit including HV cage
> > All voltages from the ARII are good.
> > B+ was adjusted to 181Vdc
>
> > The heat is coming from the side of the monitor with the 4 transistors
> > mounted to it. The HV cage area isn't that hot, so it has something to
> > do with the 4 transistors..
>
> > Any suggestions on where to look next?
>
> Most people cut a fan hole in the back door and install a fan. I would
> suggest removing all the transistors and re doing the heatsink
> compound as well.
>
> Todd
Thanks Everyone... I just did a complete rebuild on the monitor
including new transistors and heat sync compound. The compound is
good. I'll go ahead with a fan, but to me it seems as though there
must be something else causing the excess heat. I thought a fan would
fix the end result of the monitor shutting down, but not fix the
problem. If its fairly common, I'll do it and stop worrying.
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