Al,
I had the exact same problem last night, only the top half of my
Tempest screen was not there...
Here's what I did :
1> Found that one of the TO3 socket's solder leg -to-wire
connections
was bad.
Since you are missing the lower half, check the 3792 on the bottom of the
chassis (not the one on the side) that DOES NOT connect to the power
regulation circuitry. I believe it is Q705, but I am probably wrong.
2> Hairline solder cracks on the headers...resoldered them...
3> Also had a nice bout with a completely out-of-focus screen.
However, this was due to a broken focus pin on the tube socket. You don't
need to worry about this, but it may help someone in the future....
There is also a chance that the 3792 you have is actually
bad...even though it passes the diode test, this always isn't 100% the
case.
I'd examine all the solder joints closer though...make sure you
are using new solder as well and not just reflowing the joint (I'm sure
you're doing this). Check every connection from the TO3 socket right to
the connector...
Ed
On Sun, 22 Aug 1999, Al Warner wrote:
> I checked all the connectors for continuity from the pins to the end of the
> plugs. I resoldered all of the pins on the deflection PCB. Could I have
> missed something?
>
> Mike Singer wrote:
>
> > > When I got my Tempest, the picture was only appearing in the upper left
> > > corner of the screen and it would come and go. I figured "Deflection
> > > Transistors". Ordered a kit from Bob Roberts. Now I have the top half
> > > of the screen, but the bottom of the screen is being drawn in the
> > > middle. I checked that all of the transistors are not shorted and I
> > > used new mica and grease. Can anyone offer some suggestions?
> >
> > Cold solder joints on the connectors.
> >
> > Mike Singer
> > Amusement Video Pinball
>
> --
> =====================================================================
> -= Al Warner batlzone@cyberenet.net =-
> -= Learn how to install a Cap Kit in your video game's monitor and =-
> -= see a whole lot more on my web page at: =-
> -= http://www.cyberenet.net/~batlzone =-
> =====================================================================
>
>
Received on Sun Aug 22 16:32:30 1999
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