Re: Weird G05 Problem, Please Help

I haven't paid a lot of attention to this thread, but I don't think I saw
any mention of looking for cracked solder traces on the connection pins on
the monitor mother board. This is VERY common and will lead to all sorts of
weirdness...I recommend that whenever you take a single sided circuit board
out of a game, that you resolder any pin connectors that are on the board,
also check any capacitors for cracked/loose sold connections. I was
checking out my new (old) DATA I/O 29B and after storing all the
(P)ROMware, thought I'd do a little checking out in the power supply. Low
and behold, the center filter cap was a tad loose, and it actually had a
lead that had pulled out of the solder hole, and was thus a bit loose. This
was in a feed through hole and a well made board, but there still was ample
room for intermittent connections...
(sorry about the ramble)

John :-#)#

At 05:12 PM 7/23/99 -0400, you wrote:
>Hmm.. that is something I haven't checked, although i thought
>I tried plugging the y chasis transistors into the x section
>(by unmounting the board and angling it just right to use
>the plug for the y transistors), although now I'm not sure
>if I did or not. Thanks, I'll take a look at that. I'm sure
>I'll have *something* new to report on Monday. :) Have a
>good weekend everybody!
>
>Jon
>
>At 02:27 PM 7/23/99 -0500, Rodger Boots wrote:
> >The more you tell about this the more I come to the
> >conclusion that, although HIGHLY unlikely, that P600
> >(the connector for the chassis transistors) is wired wrong.
> >This is about all that could explain why a different board
> >fails the same way. NOTHING must connect to pin 2.
> >Pin 1 is the case of the 2N3716 and pin 7 is the case of
> >the 2N3792.
> >
> >Further proof would be if the board didn't blow IF P600
> >is unplugged.
> >
> >Compare the wiring of P600 to P700. It should be the
> >same.

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Received on Sat Jul 24 23:27:11 1999