blitz2000 gold/ nba showtime help needed.

dirt

Active member
Joined
Nov 10, 2004
Messages
2,971
Reaction score
10
Location
lake havasu city, Arizona
i just got a nfl blitz/showtime machine. it was missing the hard drive when i got it. i got the hard drive for it. i know the cabinet works because i plugged in a 60in1 board and everything worked fine. but when i plug in the showtime board there is no picture or sound. on the middle pcb the led it has a 7 for a few seconds then it displays 8,2,4,5,d,e,c kinda quickly. does anyone know what this means?

the voltage was at 5.24 and i turned it down to 5.09. this didn't change anything and i still have no picture or sound.

anyone have any ideas on whats going on?
 
now it is working sometimes. it works about once out of every 10 times i turn it on. anybody have any ideas whats up with this thing?
 
where are you testing your voltage at? this makes a HUGE difference. it's well known that the Midway and Atari Vegas boardsets are prone to burning up the +5 contacts on the JAMMA edge, which in turn creates more resistance, and thus results in a huge drop in voltage from the power supply to the board components.

it happened on mine. it was so bad that I could have the power supply at 5.40V and I was still only getting about 4.9V at the board itself, which is why it would randomly freeze or reset constantly.

the only way I could fix this was by replacing the actual JAMMA input board, cause the contacts were so badly burned up. now I'm told you can go the other way with the hard drive plug and use it as an INPUT rather than plugging your hard drive into it. how effectively that works, I never tried it myself...

that hard drive plug makes for a good voltage test spot. just stick your meter probes into the red wire and the black wire to test for +5, and if you want to check +12 too, just probe the yellow wire instead of the red.

I'm willing to bet that this is your problem though, if you have the voltage set that high and it's still resetting.

you want 5.10V at the board (the hard drive plug in particular... same voltage as what the roms and everything else gets, I've found)
 
never had the wrong hard drive before. not sure what happens in that event. sounds like it could be voltage though. maybe the power supply's old too.

we won't know until he checks heh
 
when i checked it at the board the voltages were going from 5.10 to 5.19 up and down depending on what the lights on the board were doing. basically pulling more power then letting up. then the game began to play and the voltage stayed steady so i set it at 5.10 and now it starts up every time, so far.

thank you for your help. if it acts up again i'll post here again.
 
well i still have'nt got this game working right. i changed the power in to the hd power and im still having problems. i have 2 different hds and chips. they both do the same thing. it just resets over and over. it did work one night. i turned it off and on a few times and it worked every time. the next morning its back to not working just resetting again. its driving me NUTS!!!!
 
Is your voltage still steady at 5.10 on the rom chips? When it's behaving and not behaving?
 
what's the power look like when you meter it at the power supply? then the board? how big is the difference. with a Vegas, you shouldn't be looking at a substantial drop in voltage if your JAMMA edge is thoroughly clean. if the +5 contacts on the JAMMA edge are burned up, it's only going to get worse over time. I never came up with a long-term solution to fixing them either, you can't use solder cause there's nowhere to really grab on to for a connection.

I've never seen it myself, but if you have the wrong security chip and hard drive configuration I think the game will reset after awhile. that was to prevent bootlegging.

if that's the case, you can look for ToplessZ on here or any number of upgrade kits on ebay.
 
Is your voltage still steady at 5.10 on the rom chips? When it's behaving and not behaving?
it is steady at 5.10 on u44 and u37. u27 is at 5.09

what's the power look like when you meter it at the power supply? then the board? how big is the difference. with a Vegas, you shouldn't be looking at a substantial drop in voltage if your JAMMA edge is thoroughly clean. if the +5 contacts on the JAMMA edge are burned up, it's only going to get worse over time. I never came up with a long-term solution to fixing them either, you can't use solder cause there's nowhere to really grab on to for a connection.

I've never seen it myself, but if you have the wrong security chip and hard drive configuration I think the game will reset after awhile. that was to prevent bootlegging.

if that's the case, you can look for ToplessZ on here or any number of upgrade kits on ebay.
i have bypassed the jamma connector and have the +5 and +12 coming in at the hard drive power wires.
i think the next step is to get new u27,u37,u44 chips and a flash drive for it. i wanted to get a flash drive for it anyway.
anyone have any other suggestions?
 
Yeah, if you did that you can rule out the JAMMA edge thing for sure.

You're probably just running a mismatched version thats causing the resets.

those boards in my experience can still run as low as 4.9v so its not the voltage. Check your video card fan for sure, you never want that to fail. Beyond that, just buy the latest version kit, flash or regular hard drive. Dont shy away from a hard drive, the only way they really fail is if you knock them around a lot. once you have a good copy you can always duplicate it with chdman later.
 
It gives me the heebie jeebies running ALL of the 5v and 12v through the hard drive connector. You've got all of the +5 running through one wire!
 
yeah I was wondering about that, that's a lot of current. that's why I always thought that was a dumb idea.
 
yeah I was wondering about that, that's a lot of current. that's why I always thought that was a dumb idea.

I'm wondering how it'd work if it was being fed power there and through the jamma connector...

Asked a hard core electrical engineer at work and got an answer but not sure we were on the same page so i'll probably try again.
 
yeah I was wondering about that, that's a lot of current. that's why I always thought that was a dumb idea.
The manual states the power req for the board is 7a. 22 awg wire is rated for 7a (not that id recommend using it, since thats peak). If my memory is correct that was 18 awg wire so as long as your connection points are solid and there is no points of high resistance there, its not going to go over current for the wire.
 
The manual states the power req for the board is 7a. 22 awg wire is rated for 7a (not that id recommend using it, since thats peak). If my memory is correct that was 18 awg wire so as long as your connection points are solid and there is no points of high resistance there, its not going to go over current for the wire.

You've got what, 4 18 gauge wires bringing +5v in from the power supply?

Still spooks me.
 
You've got what, 4 18 gauge wires bringing +5v in from the power supply?

Still spooks me.
Thats to try and accommodate for the potential of a poor connection between the edge connector and harness, as well as games that may require more power than 7a. Im not saying a single wire is good for every game, but for this one its well within the ratings of the wire :)
 
This thread is from 3 years ago. The machine I had is long gone. I am still looking for a stand up cruisn usa but your pretty far away from me.
 
Back
Top Bottom