UMK3 EPROM issues

LeeWoo

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I'm having trouble with my UMK3 board. It was working, but a week or so ago when I went to hook it up, the characters were snowy/grainy in the character select screen. It also crashed on the versus screen and restarted. I ran a board test and it came up that U54 and U63 were bad. I took them out and ran them on my reader and they came up a bad read there too (not bad data, bad chips). These chips were AMD27C040-150 and TI 27C040-10.

So I tried flashing the mame files um310u54 and um310u63 onto TI 27C040-12s. The board would not boot up at all. The DS1 light is now solid when it wasn't before. I thought maybe it was because I put 12s instead of 10s, but after flashing the same files onto known good 10s, it still does the same thing.

Am I flashing the wrong files? Is there something else I should test? I paid too much money for this board to begin with and now to not have it working is a pretty big bummer. Let me know and thanks in advance.
 
I'm having trouble with my UMK3 board. It was working, but a week or so ago when I went to hook it up, the characters were snowy/grainy in the character select screen. It also crashed on the versus screen and restarted. I ran a board test and it came up that U54 and U63 were bad. I took them out and ran them on my reader and they came up a bad read there too (not bad data, bad chips). These chips were AMD27C040-150 and TI 27C040-10.

So I tried flashing the mame files um310u54 and um310u63 onto TI 27C040-12s. The board would not boot up at all. The DS1 light is now solid when it wasn't before. I thought maybe it was because I put 12s instead of 10s, but after flashing the same files onto known good 10s, it still does the same thing.

Am I flashing the wrong files? Is there something else I should test? I paid too much money for this board to begin with and now to not have it working is a pretty big bummer. Let me know and thanks in advance.

Not sure but use romident, with other working rom, to verify version of roms.
 
Not sure but use romident, with other working rom, to verify version of roms.
I did after I flashed them. I had/have no way of identifying the ones that were on the board but bad
 
I haven't tried them in mame yet, I'll try that. I'm triple checking every step when flashing. Reading what was written, saving then verifying that against romident, etc.
 
Go the solvalou site and check which version you have. I can see there are multiple ones for the same game. It looks like you have to match the correct ROM for the version you have.

http://www.solvalou.com/subpage/arcade_roms/U

However, since the only different ROMs between versions are the ones that have gone bad on your pcb, you may need to burn several sets and try them out...

Paris

EDIT as long as you didn't mix the 54 and 63 between versions, you should have been able to get it to work...
 
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Go the solvalou site and check which version you have. I can see there are multiple ones for the same game. It looks like you have to match the correct ones for the version you have.

http://www.solvalou.com/subpage/arcade_roms/U

However, since the only different ones between versions are the ones that have gone bad on your pcb, you may need to burn several sets and try them out...

Paris
Thanks. I'll let you know the results.
 
Ok, I've tried with version 1.0, 1.1, and 1.2 to no avail on these chips. I did a read afterward and uploaded that read to romident and they checked out as the correct files. I've also double-checked the voltage on the CMOS battery. I don't know what else to do here.

Like I said, the DS1 light is solid when it wasn't before I had problems. I can't find anything online as to what that signifies though.
 
Are you still getting the red roms on 54 and 63? Are all other roms and the ram tested green? Is it booting at all or still nothing?
It's not booting at all. No ROM check or anything [emoji53]
 
zenomorp would know better, it's either U45 or U47, I wanna say if one of those goes bad, the game won't boot, and if the other goes bad, you'll just have a black screen.

there's a rhyme and a reason for the LEDs, I never cared enough to understand what they do. I think one implies +5 is present (or else the game logic wouldn't work) and the other may be for sounds or something.

the suckass part about those is they're custom ASIC chips, and eventually we're going to run out of them. be mindful the same chips were being sold on ebay, but the ones MK3 uses have custom programming in them, so the ebay ones won't work.
 
zenomorp would know better, it's either U45 or U47, I wanna say if one of those goes bad, the game won't boot, and if the other goes bad, you'll just have a black screen.

there's a rhyme and a reason for the LEDs, I never cared enough to understand what they do. I think one implies +5 is present (or else the game logic wouldn't work) and the other may be for sounds or something.

the suckass part about those is they're custom ASIC chips, and eventually we're going to run out of them. be mindful the same chips were being sold on ebay, but the ones MK3 uses have custom programming in them, so the ebay ones won't work.

Is there a way to test these other than having a replacement on-hand and swapping them out? Do these pop out or is this a soldering thing? What am I looking for as far as replacement, a match on the A-20249/20273 stickers?

I find it odd that that would be the problem though when the board booted fine before I removed the U54 and U63 chips and replaced them with new ones. And since I've been having problems with my eproms on my NBA Jam boards I've come to question my know-how of flashing roms.

Another little anomaly here is if I take certain parts out I get different light patterns:
No CMOS battery: Solid DS3 light, no DS1 light.
No U54 or no U63: Solid DS3 light is on, but DS1 light intermittently flashes in a pattern every 15 seconds. Right before the DS1 light comes on, the 2nd DS3 light (closest to the edge of the board) comes on then goes out when DS1 comes on
No U54 AND no U63: Solid DS3 light, DS1 in 15 sec pattern. The secondary DS3 does not flash.

As always, thanks for the help mecha.
 
PM me your address and I will send you a known working 54 and 63, no charge. If they don't work I would assume it's u45 or u47. Let's get this board going.
 
PM me your address and I will send you a known working 54 and 63, no charge. If they don't work I would assume it's u45 or u47. Let's get this board going.
You're awesome. PM sent. Thanks so much.
 
PM me your address and I will send you a known working 54 and 63, no charge. If they don't work I would assume it's u45 or u47. Let's get this board going.

So in the meantime, is there a way for me to test U45 or U47?
 
So in the meantime, is there a way for me to test U45 or U47?

Not unless you have an adapter for your writer that will accomodate them. As for the rev roms, they are usually 080s or 4001s. Try re-burning them using a set of either 080 or 4001. I think 040s are a different speed.
 
Not unless you have an adapter for your writer that will accomodate them. As for the rev roms, they are usually 080s or 4001s. Try re-burning them using a set of either 080 or 4001. I think 040s are a different speed.
The originals were 040s and I tried burning v1.0, 1.1, and 1.2 to a working set of 040s with no success.
 
Well, I can confirm that if your voltage isn't correct, it will cause U54/U63 to come up red or not work at all.
 
Well, I can confirm that if your voltage isn't correct, it will cause U54/U63 to come up red or not work at all.
Two different harnesses, both checking out with a multimeter come up with a blank screen. joeybagadonuts is sending me a known working copy of U63 and U54 so we can rule those out.

Unfortunately I don't have an adapter for my reader to check U45/47. If it's still blank with the known working version chips, I'll start looking into replacing the other ones I guess.
 
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