Re: WG6100 testing

So we pulled the offending transistor today, and it seems the problem
was my friend was rather sloppy with the heat sink compound, and it
was all over the pins of TO-3 transistor. I made him pull all 6 of
those transistors, clean them, and re-insert them, and test them
all again.

All the transistors now made good connections in the socket, but when
I checked to make sure there was no case to ground short, the transistor
that had previously not been making contact was now shorted to ground, and
pulling it showed the entire transistor had shorted. Weird.

We had a spare 2n3716 sitting around, so we installed that. We powered
it up like before, and the spot killer came on as expected.

We hooked up the Wico X-Y Pattern Generator, and we heard chatter in
the deflection coils (which is good!), but the spot killer stayed on. :-(

I'll read through the FAQ and other docs I have, but if anyone has
any additional things to check, let me know. This can't be that
hard to find, there aren't thay many components in the spot killer
circuit. :-)

I also finished getting my WG6100 together (sans the IPC board which
I now have, but haven't yet duplicated, so I don't wanna install it
yet) and I'm happy to report that it worked like a champ when I plugged
it into the Wico patter generator. It had pretty bad pincushioning, but
I'll worry about that once I get the entire game back together. I should
be able to do that soon, as I am almost finished cleaning the mess left
behind by some rodents. I think I'll have spent more time cleaning it
than fixing it by the time I'm done. :-(

Thanks!

___
Ken

akswanson@ntelos.net wrote:
> aww shucks, thanks for the props.. Luckily thats one Ive seen before!
> Glad it was something simple!
>
> Andrew
>
>
>
>>akswanson is a genius. :-)
>>
>>I checked, and there was a bad socket for Q102, one of the pins was
>>not making contact with the socket. I pushed the pin over so it stayed
>>in contact with the socket, retested, and the spot killer LED came on.
>>
>>I bought a bunch of new sockets yesterday, and my friend and I will
>>replace
>>that one and test all the other TO-3 sockets on the two monitors we just
>>rebuilt.
>>
>>I also borrowed an Wico Corp. X-Y Pattern Generator from my friend Al,
>>so we'll try to get some patterns up on the monitors this afternoon.
>>
>>Thanks for the help guys!
>>
>>___
>>Ken
>>
>>
>>On 07/23/11 06:41, akswanson@ntelos.net wrote:
>>
>>>Yep..serves me right for answering early in the am.. Thats true.. so Im
>>>feeling its a power supply issue.
>>>
>>>
>>>
>>>>He's not going to hear deflection chatter with the game board
>>>>unplugged.
>>>>
>>>>
>>>>
>>>>On Sat, Jul 23, 2011 at 8:16 AM,<akswanson@ntelos.net> wrote:
>>>>
>>>>
>>>>>Yeah. In my limited experience, if the monitors not working, and the
>>>>>spot
>>>>>killers not on, its either the voltage rails missing, or it could be
>>>>>the
>>>>>HV.. Im sorry I assumed you didnt hear deflection chatter..Are you
>>>>>hearing
>>>>>deflection chatter?
>>>>>
>>>>>
>>>>>
>>>>>>I assume you mean Q102 and Q103 on connector J100, right?
>>>>>>
>>>>>>I'll make sure they have a good connection and test good. We did
>>>>>
>>>>>replace
>>>>>
>>>>>>them
>>>>>>during the rebuild, but I'll make sure we installed them correctly
>>>>>>and
>>>>>
>>>>>the
>>>>>
>>>>>>still
>>>>>>work.
>>>>>>
>>>>>>___
>>>>>>Ken
>>>>>>
>>>>>>
>>>>>>On 07/22/11 16:50, akswanson@ntelos.net wrote:
>>>>>>
>>>>>>>Check your regulator bottlecap transistors.. You could have a bad
>>>>>>>connection..
>>>>>>>
>>>>>>>
>>>>>>>>My friend and I finished rebuilding our WG6100 monitors last night.
>>>>>
>>>>>I
>>>>>
>>>>>>>>still
>>>>>>>>have some power supply work to do on my Space Duel, but we figured
>>>>>
>>>>>his
>>>>>
>>>>>>>>Tempest
>>>>>>>>was ready for a smoke test.
>>>>>>>>
>>>>>>>>We put it all together, except for the game PCB. We stood to the
>>>>>
>>>>>side,
>>>>>
>>>>>>>>and
>>>>>>>>applied power. The two LEDs on the LV2000 came on, the front coin
>>>>>
>>>>>slot
>>>>>
>>>>>>>>lights
>>>>>>>>came on, and the CRT neck was glowing. No fuses blew. All good
>>>>>
>>>>>signs!
>>>>>
>>>>>>>>However, we did not see the spot killer LED come on. I would think
>>>>>
>>>>>it
>>>>>
>>>>>>>>would
>>>>>>>>come on if the game board was disconnected.
>>>>>>>>
>>>>>>>>So, should I look for issues in the spot killer circuit, or is it
>>>>>>>>expected
>>>>>>>>that the LED not come on if the game PCB is disconnected?
>>>>>>>>
>>>>>>>>A friend has an Atari vector monitor generator/tester he is going
>>>>>>>>to
>>>>>>>>loan
>>>>>>>>me
>>>>>>>>once he finds it. :-) I hope to use that for further testing.
>>>>>>>>
>>>>>>>>___
>>>>>>>>Ken
>>>>>>>>
>>>>>
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>>>>>>>
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Received on Mon Jul 25 00:46:30 2011