Re: Tron troubleshooting/repair

Yes John, I know that :-) I was trying to go light rather then heavy.
Just as the Vector collectors insist on the value of replacing the Big
Blue in Atari vector games, I insist on it for MCR rasters. I dont even
check them anymore.. I have even had some leak out there capacity
goodness :-)
It has become a must replace item on my list and that was my point.

-=Mark=-

John Robertson wrote:

> At 5:21 PM -0400 6/7/07, Mark E Davidson wrote:
>
>> Tron is part of the MCR line of games so I can lend some advice here.
>> From my experience, if you are starting with a dead game, work on the
>> power supply first. It's best to be able to test the PS board in
>> another working MCR game (Tapper, domino man, wacko, spy hunter etc)
>> to make sure it works. Common problems are in the reset line that
>> starts the game. No reset lineŠ game no workie. The reset circuit was
>> right next to the battery that as often leaked all over the place. If
>> testing your board is not an option try to get a tested an working
>> one from a reliable source.
>>
>> Item 2 Replace both big blue caps in the machine. I have seen, on
>> more then one occasion, those caps pass enough AC that a working
>> board, won't run. And you wont see it with your meter because it will
>> appear that the correct voltages are being delivered to your game
>> board.. What you won't see is all the ripple that it's getting too :-(
>>
>> -=Mark=-
>
>
> I find if you use a NON-autoranging voltmeter to check for ripple that
> they work very well. We use an inexpensive yellow meter that has a big
> rotary switch to select the voltage, resistance, etc., plus it has a
> separate switch to toggle between DC and AC readings. This little
> meter is the one we all use to check for ripple on linear power
> supplies. You can easily see if you have excessive ripple.
>
> Autoranging meters are unable (in my experience) to differentiate
> between a DC value and a lower AC value and simply give up and provide
> you with the DC (if higher) value.
>
> John :-#)#
>
>
>>
>> EvilJim wrote:
>>
>>> Hey there folks -
>>>
>>> While I have no specific problem (it doesn't work, specific enough?
>>> LOL) ATM, I was hoping to gather some FAQs/URLs for Tron related
>>> diagnosis and repair info. I have some time to work on this and it's
>>> about time it was running. So any info you may have would be much
>>> appreciated, links and the like.
>>>
>>> Then I should be able to come up with some specifics I can't fix,
>>> which I can then come back with to bother you all. =)
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>>>
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>
>
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Received on Thu Jun 7 18:24:06 2007