My best guess, ZD901, the 56 volt zener.
Commander Dave wrote:
> Hello all,
>
> Yes, these are the postings that never end. I am getting so disgusted
> with this G05-805. I was able to get a working HV diode and the
> problem of shaking and blooming still shows up. When powered up
> totally cold, the HV is fine, maybe even a little over. The image on
> the monitor,however, has a very small case of the shakes and as it
> warms up the HV (about 5 minutes or less), the image starts to expand
> and the HV starts to drop. It was down to 10.8 KV when I got
> disgusted, cut the power and left.
>
> I have:
>
> Tried different game and aux board sets (same problem)
> cleaned and resoldered connectors on the monitor
> cleaned and resoldered the flyback
> Replaced the HV diode (twice to be sure) and tightened connections
> Installed a cap kit with transistors (from Bob Roberts)]
> Freeze sprayed many components in the HV cage with no results
>
> Obviously, I have missed something somewhere and I am almost sure it
> is the obvious. I am about to start at square one and start measuring,
> rechecking and reverifing things I am taking for granted is working. I
> am so tired of working on this problem and it's starting to get in the
> way of other projects.
>
> I'll do my homework again and try to make a logical plan of attack,
> but can anyone let me know what would be good list of thingsto start
> checking first? The high voltages I have done, but what other voltages
> do I need to check? I'm starting over so what other "DUH" type things
> do I need to check again? Oh, and I am afraid that I don't have an
> O-scope, so I tests will have to be adjusted accordingly.
>
> Thanks guys, I'm sure I'll get this thing fixed one of these days if I
> don't hit it with a 2x4 first! ;-)
>
> -Commander Dave
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Received on Sun Oct 6 14:47:52 2002
This archive was generated by hypermail 2.1.8 : Fri Aug 01 2003 - 00:34:12 EDT