Wailing tron from hell

dethfactor

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So I finally got a chance to put my Tron together after repairing some resistors, a shorted cap and rebuilding the power acid damaged power regulator board. After plugging it all in all I got was lights, so in my anger I removed the regulator board and swapped it out for a switching supply/conversion board I had bought as backup. After plugging it all in I still got nothing. So I pulled out the boards and reseated all the pins and realized I had the video misconnected on apparently an unused set of pins for the cocktail version. Needless to say after testing the voltage which was correct and firing her up, this is what I got.

If anyone has any idea what this could be you'd be doing a great favor to a disappointed individual.

Videos of the event:
http://www.youtube.com/watch?v=WVwkqER-HrI
http://www.youtube.com/watch?v=XVybn8r-5a4
 
You have bad caps in the power supply. If you are using a switcher and you have that nasty hum, disconnect the marquee and see if it is still there. If it is still there suspect the line filter to have gone bad.
 
Hmm.. I'm using a brand spanking new happ switcher that's fed from the monitor AC feed per the instructions. Not only is there a hum, the board isn't powering up fully (no 12v yellow led) nor anything on the screen accept a jumpy mess.

You have bad caps in the power supply. If you are using a switcher and you have that nasty hum, disconnect the marquee and see if it is still there. If it is still there suspect the line filter to have gone bad.
 
That would indicate that you are missing the 12vdc. Test the new power supply right at the terminal lugs on the power supply.
 
I ended up doing that shortly after installing it. getting full 5 and twelve out of the lug terminals and into the pin connectors to the board itself. So it isnt the connectors
or harness. Checked against a pinout
And the power seems correct. I'm thinking it's a board problem.
That would indicate that you are missing the 12vdc. Test the new power supply right at the terminal lugs on the power supply.
 
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have you replaced the interconnect cables yet? If not try that next. If you have replaced them, verify they are hooked up properly using a dmm.
 
i had a simular problem

i had a simular problem with mine i had stable tire tracks and my boards would not boot i had rebulit the power supply and verrified the cables and power with a meter all was good but wouldent boot. so me and riptor took a look at the reset circut and found that the reset circut wasent working rite so we cut the purple wire and instantlly had tron. so now my problem is i have no spinner action havent figured that out yet but every thing else works great. so if you havent cut your purple wire on the power supply you mit give that a try if it doesent work cut it far enough away so you can re attach it or put it on a switch for easy make and break testing.

hope this helps.

Peace
Buffett
www.magfest.org
 
Disconnected the purple reset to no avail and checked it out after reconnecting it and it was feeding 5.17 volts. I also went ahead and disconnected the SSIO which made the noise stop but still no tron.

i had a simular problem with mine i had stable tire tracks and my boards would not boot i had rebulit the power supply and verrified the cables and power with a meter all was good but wouldent boot. so me and riptor took a look at the reset circut and found that the reset circut wasent working rite so we cut the purple wire and instantlly had tron. so now my problem is i have no spinner action havent figured that out yet but every thing else works great. so if you havent cut your purple wire on the power supply you mit give that a try if it doesent work cut it far enough away so you can re attach it or put it on a switch for easy make and break testing.

hope this helps.

Peace
Buffett
www.magfest.org
 
thoes are the things i would have told you that cadlicman and dorket said

sorry ,cam
 
Remove the SSIO PCB from the stack and test the CPU and Video gen boards only, I had a couple of SSIO boards cause scrambled video and once removed the picture was fine.

Could be a number of things causing this. Do you have access to another MCR game like Satans Hollow you can test the boards in? First see if the boardset is ok being you could be messing with all this stuff and simply have a bad wiring harness or corroded connections somewhere. Process of elimination....
 
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Removed the ssio completely and still garbage on the monitor. Unfortunately this is the only boardset I have and don't know anyone thus far who has MCR boards let alone let me borrow some for testing.

Remove the SSIO PCB from the stack and test the CPU and Video gen boards only, I had a couple of SSIO boards cause scrambled video and once removed the picture was fine.

Could be a number of things causing this. Do you have access to another MCR game like Satans Hollow you can test the boards in? First see if the boardset is ok being you could be messing with all this stuff and simply have a bad wiring harness or corroded connections somewhere. Process of elimination....
 
Removed the ssio completely and still garbage on the monitor. Unfortunately this is the only boardset I have and don't know anyone thus far who has MCR boards let alone let me borrow some for testing.

Ok try this then, swap out the Z80 chip on the SSIO board with the one on the CPU board and see if that helps with the SSIO board still disconnected.

If all fails send em to CDJUMP, he fixes MCR boards at a good price.
 
Cool. I'll try that. I will try that and see what kinda of silliness occurs. Regardless I will probably get in touch with CDJUMP.

Thanks

Ok try this then, swap out the Z80 chip on the SSIO board with the one on the CPU board and see if that helps with the SSIO board still disconnected.

If all fails send em to CDJUMP, he fixes MCR boards at a good price.
 
I ended up swapping out the Z80's and PROGRESS!! I see colors with the screen rolling and the faint hint of the opening screen of the game!! Please don't mind the commentary, I had a shitty night as my boiler went out so I tried this real quick and it gave me a glimmer of hope.

http://www.youtube.com/watch?v=cX9kNnau8B8&feature=player_embedded

She's close, do you think this is a monitor issue at this time or is the sync out of the PCB bad?

Ok try this then, swap out the Z80 chip on the SSIO board with the one on the CPU board and see if that helps with the SSIO board still disconnected.

If all fails send em to CDJUMP, he fixes MCR boards at a good price.
 
I ended up swapping out the Z80's and PROGRESS!! I see colors with the screen rolling and the faint hint of the opening screen of the game!! Please don't mind the commentary, I had a shitty night as my boiler went out so I tried this real quick and it gave me a glimmer of hope.

http://www.youtube.com/watch?v=cX9kNnau8B8&feature=player_embedded

She's close, do you think this is a monitor issue at this time or is the sync out of the PCB bad?

Hmmmm, well I've never seen a screen like that. :confused: It's possible you have some bad EPROMS on the video gen board or bad RAM. PM CDJUMP and have him look at the video you made, maybe he can finger out what the boards are doing and give you some ideas.
 
first, adjust the horizontal hold on your monitor. From there, start cleaning and reseating the 93422's on the video pcb, and also the rams on the scpu pcb, specifically, the one thats right under the 2 eproms on the top of the scpu.
 
Went ahead and pulled cleaned the ram and fixed the 93422's and it seems like its stuck in some weird test mode while in cocktail mode. Reattached the SSIO and flipped the dips around trying to kick it into the regular game to no success.

Here's where we are currently:
http://www.youtube.com/watch?v=4pQ0wtneGGw&feature=youtube_gdata_player


first, adjust the horizontal hold on your monitor. From there, start cleaning and reseating the 93422's on the video pcb, and also the rams on the scpu pcb, specifically, the one thats right under the 2 eproms on the top of the scpu.
 
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