Lemony Vengeance
Champion
even if the N2 resolution is set to 15K, you should see and hear SOMETHING.. Voltage is legit the first thing I'd check. it's got to have 3.3v on the dot while powered on. 5v can be varied a bit.
Need help with my Naomi 2 CF setup.
- Thread starter robbiederhase
- Start date
robbiederhase
Student
copy, thank you. if the voltage is not 3.3v where on the blast do i adjust it and for that matter where do i test it with a multimeter? sorry again, still very new to the blast/jvs set up...
i can't imagine it was cranked over 3.3v as it was only running a pandora box which ran just fine.
however if it is currently over 3.3v is there a chance the N2 is fried?
just very stressed out worrying i may have completely messed up here beyond any reasonable measure.Oh and thank you so much for the harness/adapter, Lemony! As you can see it arrived safely lol.
measured the input voltages to the Naomi2 3.3V, 5V, 12V?. also try to test the Naomi 2 without the dimm if it starts it has problems in the dimm if so you could clean the socket and if it still does not work the Dimm has problems
i don't trust original sega power supplies that's why i use a computer power supply (ATX) better reliability and confidence in correct voltage and current delivery
robbiederhase
Student
I just tried running the N2 without the dimm hooked up as well as the IO board and still only get a black screen... The Naomi does still run the fan...measured the input voltages to the Naomi2 3.3V, 5V, 12V?. also try to test the Naomi 2 without the dimm if it starts it has problems in the dimm if so you could clean the socket and if it still does not work the Dimm has problems
i don't trust original sega power supplies that's why i use a computer power supply (ATX) better reliability and confidence in correct voltage and current delivery
I also noticed there's a mild flicker on the screen but not as if the video was actually coming through.
I'll have to go get a new multimeter and check the voltage.
But is the voltage checked for the blast city the same as a jamma cabinet? i've only ever dealt with jamma so I was unaware if checking for the voltage was different for a jvs capable machine.
thank you!
The power supply of the Sega BlastCity is switched internally it has some regulation potentiometer for the 5V and 3.3V check it I attach an image where it is but check the voltage of that power supply well I think that one is worn out take into account that it is a machine with 20 years or more may need maintenance
robbiederhase
Student
Okay so I've honestly been terrified to adjust my voltage at all... I can't seem to find a good way to test the voltage on this thing and I don't want to risk anything...
I can't find any local repair shops that will answer my calls either.
But. I took a look at the PSU and it looks like it has in fact been tweaked prior..
Should I try moving the 3.3v back to line up the red lines? Is clockwise turning the voltage up or is it counter clockwise?
I'm sorry again, everyone... I just want to make absolutely sure here.
I've never had to adjust voltage of any kind before, despite at least knowing how to work with Jamma voltage.
I've been lucky enough to have all my previous cabs work with everything I've thrown at them.
So this JVS stuff has me even more on edge.
I can't find any local repair shops that will answer my calls either.
But. I took a look at the PSU and it looks like it has in fact been tweaked prior..
Should I try moving the 3.3v back to line up the red lines? Is clockwise turning the voltage up or is it counter clockwise?
I'm sorry again, everyone... I just want to make absolutely sure here.
I've never had to adjust voltage of any kind before, despite at least knowing how to work with Jamma voltage.
I've been lucky enough to have all my previous cabs work with everything I've thrown at them.
So this JVS stuff has me even more on edge.
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mR_CaESaR
Champion
You've got a dmm (digital multi meter) yeah? Are you able to take all the readings for your 3.3v and 5v?
You can turn on your cab without anything plugged in to take readings on the Sega 001 loom.
That being said, I've never had great success with a Naomi 2 and net dimm on a blast city psu, I recapped my psu and I was able to get my Naomi 1, net dimm and Sega io rev b to work.
Have you got a sun psu or even an atx psu around to power the Naomi? This will allow you to remove the blast psu out of the picture and really try and isolate where the issue lies.
If not, do you have a Naomi cart you can test and validate the Naomi is working?
It's all just about a process of elimination. We will get you there, you just have to be patient
You can turn on your cab without anything plugged in to take readings on the Sega 001 loom.
That being said, I've never had great success with a Naomi 2 and net dimm on a blast city psu, I recapped my psu and I was able to get my Naomi 1, net dimm and Sega io rev b to work.
Have you got a sun psu or even an atx psu around to power the Naomi? This will allow you to remove the blast psu out of the picture and really try and isolate where the issue lies.
If not, do you have a Naomi cart you can test and validate the Naomi is working?
It's all just about a process of elimination. We will get you there, you just have to be patient
robbiederhase
Student
Thank you, I appreciate your pateince..You've got a dmm (digital multi meter) yeah? Are you able to take all the readings for your 3.3v and 5v?
You can turn on your cab without anything plugged in to take readings on the Sega 001 loom.
That being said, I've never had great success with a Naomi 2 and net dimm on a blast city psu, I recapped my psu and I was able to get my Naomi 1, net dimm and Sega io rev b to work.
Have you got a sun psu or even an atx psu around to power the Naomi? This will allow you to remove the blast psu out of the picture and really try and isolate where the issue lies.
If not, do you have a Naomi cart you can test and validate the Naomi is working?
It's all just about a process of elimination. We will get you there, you just have to be patient
So thankfully I do have a Sun PSU! The kit I bought came with one. I was told I wouldn't need it though so I put it away, but I can ddefinitely bust it back out if need be.
I need to buy a new multimeter.. My current one has a screen with some dead cels on the numbers.
But how and where on the loom do i check both 3.3v and 5v seperately? I applogize, I'm a very visual learner. If there's some kind of image available with where I need to check that would be so very much appreciated...
But if the Sun PSU eliminates the need for the blast's PSU will I even need to go about checking? I feel as if I've seen some say I should use the blast's in tandem with the sun's but I could be mistaken.
Thank you!
mR_CaESaR
Champion
All good mate, we were all there at one stage.
The Sega blast city loom 001 will have an 8 and 6 way connector.. All the bottom wires (white) will be ground - so put your black probe in one of those holes..
Then put your red probe in Pin 2 on the 6 way connector (based on the below diagram) should be 5v (yellow) to get a reading
Repeat the same process for pin 1 to get then 3.3v (brown) reading.
Depending on the connector you have on your sun psu, you might be able to plug it into CN13 on the blast city io to allow you to power the sun psu when you turn the blast on.
Also, if the sun does work, you still should check the voltage, it's the first thing you should learn how to comfortably do in this hobby as inconsistent voltage is the root of all evil in this hobby
A friend of mine uses a Naomi 2, capcom io and net dimm in tandem with a blast psu for his setup.
The Sega blast city loom 001 will have an 8 and 6 way connector.. All the bottom wires (white) will be ground - so put your black probe in one of those holes..
Then put your red probe in Pin 2 on the 6 way connector (based on the below diagram) should be 5v (yellow) to get a reading
Repeat the same process for pin 1 to get then 3.3v (brown) reading.
Depending on the connector you have on your sun psu, you might be able to plug it into CN13 on the blast city io to allow you to power the sun psu when you turn the blast on.
Also, if the sun does work, you still should check the voltage, it's the first thing you should learn how to comfortably do in this hobby as inconsistent voltage is the root of all evil in this hobby
A friend of mine uses a Naomi 2, capcom io and net dimm in tandem with a blast psu for his setup.
Lemony Vengeance
Champion
Also, not necessarily trying to move items, but I make JVS voltmeter extension cables as well as a SUN PSU extension cable for the blast.
I have a feeling they would help you out here
I have a feeling they would help you out here
robbiederhase
Student
thank you so much for the diagram. this helped me a ton in understanding.All good mate, we were all there at one stage.
The Sega blast city loom 001 will have an 8 and 6 way connector.. All the bottom wires (white) will be ground - so put your black probe in one of those holes..
Then put your red probe in Pin 2 on the 6 way connector (based on the below diagram) should be 5v (yellow) to get a reading
Repeat the same process for pin 1 to get then 3.3v (brown) reading.
Depending on the connector you have on your sun psu, you might be able to plug it into CN13 on the blast city io to allow you to power the sun psu when you turn the blast on.
Also, if the sun does work, you still should check the voltage, it's the first thing you should learn how to comfortably do in this hobby as inconsistent voltage is the root of all evil in this hobby
A friend of mine uses a Naomi 2, capcom io and net dimm in tandem with a blast psu for his setup.
so i was able to get out and get a new multimeter. the readings are way off from what they should be... at least i think with what setting i have the thing on..?
they were all over cranked which i'm hoping hasn't damaged the naomi......
should i just install the sun psu?
if i should go about adjusting the voltage which way is voltage up and which way is down?
thanks much again...
pictures attached.
left to right
6pin 1, 6pin 2, 8pin 1, 8pin 2, and 8pin 3
No worries! lol. If I come down that road you'll be at the forefront of my search, Lemony!Also, not necessarily trying to move items, but I make JVS voltmeter extension cables as well as a SUN PSU extension cable for the blast.
I have a feeling they would help you out here
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you have to measure with the knob set to 20 DCV to measure the correct voltage there you are measuring in AC (Alternating Current) in the photos
robbiederhase
Student
okay thank you i had a feeling i was off... the tutorials i was looking at weren't very clear.
gave it another go. sorry about that...
realized just now i only needed to check the first two pins on the 6pin and just the third on the 8pin.
so here's left to right again
6pin 1, 6pin, 2, and 8pin 3.
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mR_CaESaR
Champion
That'd be why you're not booting the naomi, your 3.3v is only reading at 2.26v :o
5v is over and your 12v appears to be VERY low.
3.3v and 5v have pots on the blast PSU, but there's no 12v pot. With the readings you're getting, while the machine is on, dial your 3.3v up slowly (turn to the right) to make sure you get to 3.3v and repeat the same process for 5v but instead of dialing up, you need to dial down (turn to the left)
I would dial those values first and try your stock psu, and if you still don't get anything, install the Sun PSU.
5v is over and your 12v appears to be VERY low.
3.3v and 5v have pots on the blast PSU, but there's no 12v pot. With the readings you're getting, while the machine is on, dial your 3.3v up slowly (turn to the right) to make sure you get to 3.3v and repeat the same process for 5v but instead of dialing up, you need to dial down (turn to the left)
I would dial those values first and try your stock psu, and if you still don't get anything, install the Sun PSU.
How do I verify that original switching power supply of the sega blastcity has to be urgently maintained or use another power supply, since the +12v are very low in their voltage range, the 3.3v can be adjusted with the knob on the previous photo where it says 3.3vo 3v3 upload it with a cross screwdriver.
robbiederhase
Student
okay good news + bad news.
good news is the 5v is dialed back proper and blips between 5v-5.1v
bad news is the 3.3v pot will not go past 2.27v...
mR_CaESaR
Champion
Time for you to install the Sun PSU I think
robbiederhase
Student
gotcha.. okay so i just plug the back side of the sun psu into cn13 on the blast io right?Time for you to install the Sun PSU I think
thank you sm again... making progress...
mR_CaESaR
Champion
If it's the same connector and pins 1 and 3 marry up, then you should be able to connect it.
For testing purposes, I would try and see if you can plug it outside of CN13.
For testing purposes, I would try and see if you can plug it outside of CN13.
robbiederhase
Student
copy. so this is my sun psu.
i only see this smaller six pin connector on the back. is there i place to plug it in other than the blast io for testing?
these 2 connectors on the front are for the jvs to naomi i realize but what is the third one? first guess was driving games or other cabs that need specific power for other controlling options.
do other sun psu's have different connections to plug in elsewhere for easier testing or power options? (why mine only has the one. or is that normal it just has the one.)
