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Author Topic: Tron video issue  (Read 4945 times)

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Offline newkid3

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Tron video issue
« on: November 06, 2015, 07:44:10 PM »
Does anyone know what could cause this? I have changed out the 8 socketed ram on the video board. Reseated the 4 custome ic on the super cpu with no change. I hooked it to another monitor just to make sure. It was the same way so it has to be on the pcb board. Any help would be greatly appreciated. It is about to make me pull my hair out. What little i have left.

Offline newkid3

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Re: Tron video issue
« Reply #1 on: November 06, 2015, 07:57:35 PM »
This is a punch out. Just not the whole screen. It all looks the same.

Offline newkid3

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Re: Tron video issue
« Reply #2 on: November 12, 2015, 06:50:02 PM »
Anyone have any idea. It is in the text only.

Offline jtwine

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Re: Tron video issue
« Reply #3 on: January 20, 2016, 09:27:21 AM »
It looks (to me) that the bottom part of the characters is being duplicated.  In my (limited) experience, this is likely a stuck address line.  You could find out what part(s) of the board are responsible for character generation or if specific ROMs have character data, and see if you have an address line that is not toggling like the others, then work your way back to find what is pulling that line down/up, like a bad buffer or multiplexer somewhere.

I do not have the schematics for Tron handy.  Snooping through MAME source code might help a little, too.

Trivia: Tron was my first game. 
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Google me for more info.

Offline newkid3

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Re: Tron video issue
« Reply #4 on: January 20, 2016, 09:40:05 AM »
Thanks, i sent the board set off and got it repaired.

Offline Northrad

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Re: Tron video issue
« Reply #5 on: October 08, 2018, 03:23:20 PM »
Where/Whom did your send your Tron board to and how much did it cost to fix if you don't mind sharing what the work done was and cost please? Sending a TRON pcb out to repair to a stranger to can be stressful.

Offline newkid3

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Re: Tron video issue
« Reply #6 on: October 09, 2018, 06:01:45 PM »
The Tron board was sent to Eldorado Games. I do not know what they did to fix it. As far as the cost I can not remember.

Offline 777sizzler

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Re: Tron video issue
« Reply #7 on: October 09, 2018, 06:21:06 PM »
I had many of these original back in the day.  They were problamatic.  The issues were --yes the boards and wiring---PIN connectors not getting good contact.  Each chip witch power OFF you can use your pick tool and remove and re-seat.  It works on my last arcade original ms. pac-man when I need to do it.  Just a thought.  Can't assume someone else's work. 

Offline TheDude

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Re: Tron video issue
« Reply #8 on: November 13, 2018, 10:11:57 PM »
Where/Whom did your send your Tron board to and how much did it cost to fix if you don't mind sharing what the work done was and cost please? Sending a TRON pcb out to repair to a stranger to can be stressful.
I just had a Tron pcb stack come back from user cdjump on klov. Nothing but positive things to say about the repair, cost and turn around time. He is known for rocking out MCR repairs.

Offline Scucci

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Re: Tron video issue
« Reply #9 on: May 20, 2020, 08:16:50 AM »
Where/Whom did your send your Tron board to and how much did it cost to fix if you don't mind sharing what the work done was and cost please? Sending a TRON pcb out to repair to a stranger to can be stressful.
I just had a Tron pcb stack come back from user cdjump on klov. Nothing but positive things to say about the repair, cost and turn around time. He is known for rocking out MCR repairs.

^^^^ X1000

Chris (CDJump) is the MCR master. VERY fast turn around time and very reasonable costs. Dealt with him a few times with Tron, Satan's Hollow, DOT, Timber boards... all came back rock solid and didn't cost a fortune.

 

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