Crazy Taxi Help!

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crujones4life

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I picked up a Crazy Taxi machine today at the auction. At first there was no pic or sound, but the power was on. After leaving it off for a while someone turned it back on and the game loaded up with sound and froze at the character select screen and then sound kept looping. I got it home plugged it in and I actually got to play for like 3 seconds before it froze again. If you turn it off and right back on, it will power up but no pic or sound. If you leave it off for a long while it will load up and then freeze. Any ideas? Please help!
 
SetaSouji??

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This could be lots of stuff, something as simple as it needing a new disk. Pop it out and have a look.
 
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crujones4life

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I did not see any disk?!?! Am I retarded? There is a giant metal box, took the lid of and it looks like there is three big pcbs stacked on top of each other, no cart or cd so far as I can tell...Help!
 
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RetroRepair

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Is it Crazy Taxi High Roller? That's on a Chihiro system which is a large metal box.

Otherwise you are looking for a blue round disc drive and a white box.

It sounds like something important is overheating though, good news is it doesn't sound like it's the disc. If it's High Roller you should at least be able to recoup costs if you can't get it running.
 
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I'll chime in as I owned one of these.

First, there is no CD, or hard drive of any kind. Crazy Taxi is cart only.

1. Lift the seat back
2. Remove the remaining woodsquare with the rubber diamond plate on it off the metal box.

Looking at the pcbs, you want to pay attention to the big white one. Should have a naomi sticker on it. The crazy taxi cart is mounted ontop and is flush with the unit. Try reseatting it.

The symptoms you are describing also sound like inadequate power to the unit. I'd ask over at sega-naomi.com for specifics, but I'd check voltage to the main board. Power comes in at the bottom right if you're looking at the side of the motherboard that has all the connections on it. There are 2 square molex connectors that come from the power supply.

edit: also if you take a look at the power supply, there should be a sticker on top describing the connector pinout, and which voltages are carried on what pins.


good luck.
 
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crujones4life

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SamuraiShodownSensei said:
I'll chime in as I owned one of these.

First, there is no CD, or hard drive of any kind. Crazy Taxi is cart only.

1. Lift the seat back
2. Remove the remaining woodsquare with the rubber diamond plate on it off the metal box.

Looking at the pcbs, you want to pay attention to the big white one. Should have a naomi sticker on it. The crazy taxi cart is mounted ontop and is flush with the unit. Try reseatting it.

The symptoms you are describing also sound like inadequate power to the unit. I'd ask over at sega-naomi.com for specifics, but I'd check voltage to the main board. Power comes in at the bottom right if you're looking at the side of the motherboard that has all the connections on it. There are 2 square molex connectors that come from the power supply.

edit: also if you take a look at the power supply, there should be a sticker on top describing the connector pinout, and which voltages are carried on what pins.


good luck.
Click to expand...

Wow, thanks for all the info. I'll look into this a little later when I get a chance. I'll post my results later. Thanks!
 
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crujones4life

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Alright, there is no cart in this machine! only a stack of 3 pcbs, one of which I believe to be the "cart", this is the smaller pcb on the very top. Machine played for like 5 minutes earlier then froze, then reset, then sound and pic cut out, but the power was still on and all pcb lights were still lit up, fans going, etc. I am not going to get any sleep tonight...I tried turning the voltage up an oh so little bit at a time, i did not notice any difference, do you need to give it a good half turn for it to register an increase in voltage? any other ideas? thanks
 
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crujones4life said:
Alright, there is no cart in this machine! only a stack of 3 pcbs, one of which I believe to be the "cart", this is the smaller pcb on the very top. Machine played for like 5 minutes earlier then froze, then reset, then sound and pic cut out, but the power was still on and all pcb lights were still lit up, fans going, etc. I am not going to get any sleep tonight...I tried turning the voltage up an oh so little bit at a time, i did not notice any difference, do you need to give it a good half turn for it to register an increase in voltage? any other ideas? thanks
Click to expand...

is it possible to take a picture? I've never seen a naomi installed without the plastic case. and don't just "crank the voltage up" you should have a decent multimeter on hand for something like this.
 
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crujones4life

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So, I turned the voltage down and I was able to play like 20 games in a row without it freezing or resetting. Is it possible it was getting to much voltage? I have taken some pics and will email them to you probably tomorrow. Thanks!
 
Hewitson

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crujones4life said:
Alright, there is no cart in this machine! only a stack of 3 pcbs, one of which I believe to be the "cart", this is the smaller pcb on the very top. Machine played for like 5 minutes earlier then froze, then reset, then sound and pic cut out, but the power was still on and all pcb lights were still lit up, fans going, etc. I am not going to get any sleep tonight...I tried turning the voltage up an oh so little bit at a time, i did not notice any difference, do you need to give it a good half turn for it to register an increase in voltage? any other ideas? thanks
Click to expand...
You'd rather risk destroying your NAOMI system than spend $5 on a cheap multimeter?

You're an idiot. Get some professional assistance or get a clue. People like you are the reason theres so many fucked PCB's around.
 
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Hewitson said:
You'd rather risk destroying your NAOMI system than spend $5 on a cheap multimeter?

You're an idiot. Get some professional assistance or get a clue. People like you are the reason theres so many fucked PCB's around.
Click to expand...

hey ass, how about you walk outside and stare into the sun.
 
Arcademan

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crujones4life said:
So, I turned the voltage down and I was able to play like 20 games in a row without it freezing or resetting. Is it possible it was getting to much voltage? I have taken some pics and will email them to you probably tomorrow. Thanks!
Click to expand...
It is a good possibility. Too much voltage to a board can have that effect as would too little voltage however too much is defiinitely not a good thing.
 
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crujones4life

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It reset on me again a few times today, but I was able to play a while first. Gonna pick up a multimeter thingy and test the voltage to see if I can get it just right. I hope that is all that is wrong. I only paid $350 for it!
 
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can someone tell me what to do with this multimeter and where to do it at? Thanks, and I require a great deal of detail as I am apparently an idiot...
 
Borman

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Just as a note, some early Naomi games came in the cage setup that you describe, and not the later plastic case that most people know.
 
not sonic

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crujones4life said:
ok, got a perfect 5v and 3.5v. what should i check next? ram and rom all perfect too...
Click to expand...

when you say ran and rom perfect im assuming you ran the bios tests?

hmm.

try monitoring the voltage and see if you can catch it during a freeze. its possible your power supply is faulty. also are you testing the voltage at the pcb or at the psu? its more accurate at the pcb end. check all the different supplies too not just one of each.

other than that its not completely uncommon for naomis to have hardware issues from bad solder joints, etc.

mobos are pretty cheap, you could get one to swap out and see if that helps.
 
Dion

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not sonic said:
try monitoring the voltage and see if you can catch it during a freeze. its possible your power supply is faulty. also are you testing the voltage at the pcb or at the psu? its more accurate at the pcb end. check all the different supplies too not just one of each.
Click to expand...

Sounds like a PS issue. Try to reseat each pcb in the stack also.
 
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crujones4life

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not sonic said:
when you say ran and rom perfect im assuming you ran the bios tests?

hmm.

try monitoring the voltage and see if you can catch it during a freeze. its possible your power supply is faulty. also are you testing the voltage at the pcb or at the psu? its more accurate at the pcb end. check all the different supplies too not just one of each.

other than that its not completely uncommon for naomis to have hardware issues from bad solder joints, etc.

mobos are pretty cheap, you could get one to swap out and see if that helps.
Click to expand...

the multimeter was reading 5v during the freeze/reset at the pcb, but I could not get a read at the 3.3v during the freeze, but I think that was cause I could not get to the contacts real well. What do you mean by each supply?
 
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crujones4life

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OK, checked all power supply leads, got 3.3, 5, and 12.2 all across the board at the pcb when the game would not even load. Ever since I adjusted the power supply I can't even get the game to boot anymore. Don't know if it's coincidence or not. I took apart the pcbs, cleaned the dust off, and reseated the game. Game will not load. Am I screwed? What else can I try? Please help.
 
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crujones4life

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tried 5.1v per sega-naomi.com, still nothing, can't get pic or sound anymore, all pcb lights still light up though...
 
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crujones4life

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If when I power up the naomi without crazy taxi in it and still nothing comes up on screen, should I assume the motherboard is toast? There should be an error message of some sort, right? Please take the time to help me out if you can. Thanks!
 
Dion

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I'd like to see some pics.
 
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