Re: Tron troubleshooting/repair

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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Received on Thu Jun 7 17:40:03 2007