Track & Field Board Repair Questions

iggins

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Hey all - I'm working on my Track & Field board, and I have a few questions.

1) Is this a "normal" T&F board (see pics)? It doesn't match pictures I've seen online. No board number/Konami text, no little power cable between boards. - Found a similar board sold on eBay. My board does not match the Konami schematics from the manual. This is probably a Centuri version?

4) The crowd/scoreboard graphics are scrambled, though the characters and track look OK. I assume this is a bad ROM. Can someone point me to a map of which ROMs may hold that data? (This is just to save time pulling and verifying... :) ) I'm not sure how to correlate the ROMs in the set to the ones on my board. Any suggestions?

Thanks for any help!

Resolved:
[Apparently the cap that popped was old. I replaced it with a different one, and sounds are working OK now, and the amp is not getting hot. This board is mono only, too...]
2) Does anyone have a source for a heatsink? Mine doesn't have one, and it's getting quite warm.
3) I powered it on, and the sound seemed to work, though it was quite low, and the volume pot doesn't seem to change it much. I ran the board for a few minutes in attract mode, and one of the electrolytic caps in the audio section popped and began to leak. Could this be a symptom of not having the heatsink?
 

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Follow up with additional information. Need assistance with the EPROMS and images.

I pulled the EPROMS to verify the CRCs. Five out of seven of the "gfx1/2" ROMs matched the CRCs, the other two did not match, so I programmed two new parts, but there was no change to the corruption.

I then tried to CRC the "maincpu" EPROMS. None of the CRCs matched either the "trackfld" or "trackfldc" ROM image CRCs. For an experiment, I tried programming all new "maincpu" ROMs for the board, but when I put them in, I got the corrupted graphics on the entire screen, instead of the top half. Putting the original ROMs back in, returned the board to the original 1/2 corrupted state.

Any ideas why the main EPROMS don't match either set of ROM images?

Since my board isn't an original Konami, I'm not sure I'm using the right images. Does anyone know which images go on the top board and which images go on the bottom board?

Thanks!
 
As your board isn't an original Konami it means all bets are off regarding checking the ROMs against the Mame set. In the early days bootleggers often modified the game code slightly, either to change the game name, remove the copyright notice or even fiddle with the defaul names on the score board. Also bootleg games may not have been added to MAME if they are no different to play than the original but different at a code level, no one would ever choose the bootleg version over the official one so it's wasted effort to emulate it. Even a single bit changed would give the dump a different CRC and it would no longer be recognised. But, as your game runs, the exe ROMs are likely to be fine, just unknown versions. However on bootlegs the gfx and sound data were rarely modified so I would dump the gfx ROMs, you might find you have mostly 100% matches, replace the ones that fail and see what you get. With bootlegs you can never be sure if an unknown ROM is just an unknown version or a ROM that has corrupted data.

Finally, corrupted score board entries is usually because the battery on board is dead. Am not sure if this causes the crowd to corrupt too, someone more familiar with the game will have to comment on that. On the official board there is a dip setting to wipe the score data at boot and not rely on the junk data in a badly powered SRAM chip.
 
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More updates for posterity.

The additional ROMs don't match the NZ set either. The ROMs that I've been able to correlate to the sets mostly match the CRCs, with just a couple different. Burning new parts for those didn't seem to change anything.

I did find the cause of the upper half screen corruption. There was a damaged trace on the larger board. I fixed the break, and now all of the screen is uncorrupted. But now I've done something else...

The game was playable, with the top half scrambled. However, after swapping around ROMs and retesting the board, now it won't boot, and all I get are "O"s all over the screen (or sometimes "N"s). Probably a cold solder joint that cracked with all of the flexing. Voltages look OK all over the board.

Will report back when it's booting again.
 
Built up a test bench so I could test it outside of the cabinet, and have gotten the board to boot. Turns out it's a Hyper Olympic board, and possibly a bootleg version of that. Still a little graphic corruption on the title screen, but I hope to get that straightened out once I get my EPROM reader/burner working properly again.

It also appears to be drawing 4A on 5V, but I haven't noticed any warm components, so that may be an incorrect reading. That could be why it's not working in the cabinet, though.
 

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