Search found 523 matches

by dj_johnnyg
January 18th, 2020, 11:31 pm
Forum: Cabinet Q&A
Topic: JVS PSU
Replies: 7
Views: 760

Re: JVS PSU

Sorry, didn't get a notification for this.

I can't show you the PCB, as that is encased in adhesive heat-shrink. For the JVS, I just soldered to the +5v and Ground, then soldered to one of the (unused) -5V pins on the JAMMA connector.
by dj_johnnyg
November 15th, 2019, 12:10 am
Forum: Monitor Q&A
Topic: Mushiking Sanwa 14" CRT
Replies: 3
Views: 418

Re: Mushiking Sanwa 14" CRT

I am usually running 1 video signal (Naomi or Riverservice JVS>JAMMA thing), but also happens if I feed each cab its own signal (2nd cab is JAMMA too).

Changing contrast doesn't seem to affect anything (apart from contrast obviously :awe:)
by dj_johnnyg
November 7th, 2019, 3:47 am
Forum: Cabinet Q&A
Topic: JVS PSU
Replies: 7
Views: 760

Re: JVS PSU

You can build a simple voltage inverter circuit. Feed +5v in, and you get -5v out. I have one attached to my JAMMA>JVS converter which works nicely, as the -5v is generally low current. I probably have some units knocking around, but shipping would be $$$. Found a schematic, which looks similar to w...
by dj_johnnyg
November 7th, 2019, 3:16 am
Forum: Monitor Q&A
Topic: Mushiking Sanwa 14" CRT
Replies: 3
Views: 418

Mushiking Sanwa 14" CRT

and my cabinet woes continue... So I've got the mushi's linked, and all is working well, but I'm now having some major issues with monitor colour stability, so after some advice. Cab 2 seems to be fine, but adjusting the Red and Green pots just seems to either turn the colour on or off. There is no ...
by dj_johnnyg
September 29th, 2019, 12:39 am
Forum: Cabinet Q&A
Topic: Linking Sega JVS I/O 837-13551
Replies: 18
Views: 1325

Re: Linking Sega JVS I/O 837-13551

Just a quick update on this. Yes you can link JVS I/Os and it will work, but my advice is pretty much don't bother. The comms between the I/Os is very sensitive, so you can spend a good amount of time powering up the cabs in the correct order for both IOs to be recognised. JAMMA games (via the River...
by dj_johnnyg
September 29th, 2019, 12:29 am
Forum: Game Hardware Q&A
Topic: What's wrong with my Naomi 2?
Replies: 7
Views: 484

Re: What's wrong with my Naomi 2?

Sadly it is terminal.
Fired it up again to check no other RAM was fried, and totally dead. So into the spares bin it goes incase the N1 goes titsup.
by dj_johnnyg
September 23rd, 2019, 5:40 am
Forum: Game Hardware Q&A
Topic: What's wrong with my Naomi 2?
Replies: 7
Views: 484

Re: What's wrong with my Naomi 2?

Just done a RAM test, and it looks like IC22 & 23 are bad.

Anyone know a good source & part number for the RAM?

Cheers
by dj_johnnyg
September 23rd, 2019, 5:17 am
Forum: Game Hardware Q&A
Topic: What's wrong with my Naomi 2?
Replies: 7
Views: 484

Re: What's wrong with my Naomi 2?

Naomi 1 is fixed - I forgot you have to power-off for the network settings to actually work, the reboot doesn't seem to work for me :awe: Anyway, I think the N2 is toast. I've found the original Export BIOS, and swapped it out, but still the same issues. I've tried in the other cab, and again the sa...
by dj_johnnyg
September 22nd, 2019, 6:23 am
Forum: Game Hardware Q&A
Topic: What's wrong with my Naomi 2?
Replies: 7
Views: 484

What's wrong with my Naomi 2?

After some help with a weird issue on my Naomi 2. Current setup is N2, netbooting with a multi-BIOS, in a mushiking cab with Sanwa 15k monitor. Everything has been working fine for a good 12 months or so, but not been used over the winter. Turned the unit on today, as part of the never ending arcade...
by dj_johnnyg
April 27th, 2019, 2:13 am
Forum: Game Hardware Q&A
Topic: [REL] NAOMI Multi-region BIOS
Replies: 91
Views: 29808

Re: [REL] NAOMI Multi-region BIOS

Finally dug out the programmer & got this mofo burnt for the N2.

Superb Work! :awe:
by dj_johnnyg
April 19th, 2019, 11:01 pm
Forum: Game Hardware Q&A
Topic: CPS2 A Board Fried?
Replies: 17
Views: 963

Re: CPS2 A Board Fried?

penrhos wrote:
April 19th, 2019, 10:51 pm
Do what I do - put a blob of solder across to bridge top & bottom pins together where the key goes, works perfectly and isn't going to drop out.
I pull the pins out, then use a thin cable-tie pulled really tightly and hot glued in place for good measure.
by dj_johnnyg
April 19th, 2019, 10:57 pm
Forum: Monitor Q&A
Topic: Amiga RGB Jail Bars
Replies: 3
Views: 387

Re: Amiga RGB Jail Bars

It's an old plasma, UK spec so has SCART, but the only TV I have that will do RGB. All other consoles are fine via RGB on this TV, just the Amiga. I might try running it through a SCART > Component adapter on another monitor, before I succumb and crack the soldering gear out again... Thanks While I'...
by dj_johnnyg
April 18th, 2019, 9:40 pm
Forum: Monitor Q&A
Topic: Amiga RGB Jail Bars
Replies: 3
Views: 387

Amiga RGB Jail Bars

This seemed like the relevant place to put this, but mods feel free to move as required. Picked up a cheap Gotek for my Amiga 600 and after playing a bit using the composite output decided to build an RGB cable using the schematic from: http://www.ianstedman.co.uk/Amiga/amiga_hacks/Amiga_SCART/amiga...
by dj_johnnyg
April 18th, 2019, 7:29 am
Forum: Arcade Games
Topic: DDR Cabs
Replies: 5
Views: 651

Re: DDR Cabs

I've no idea ,but will watch your mid life crisis with interest :D :awe: I'm not bald or fat enough to buy a 911 (although I probably have the pre-requisite small willy), so a new cab it has to be. Other idea is to build a Megalo clone cab, since 50" Rear Projection screens are cheap here. I'm temp...
by dj_johnnyg
April 18th, 2019, 7:25 am
Forum: Arcade Games
Topic: DDR Cabs
Replies: 5
Views: 651

Re: DDR Cabs

Looking like the cost is going to be the major factor here :awe: since the NZ Peso conversion rates to real currency means everything is a **** more expensive, then shipping on top! Looking at building a controller platform, then linking to either a console, or one of the windows based systems - sin...
by dj_johnnyg
April 17th, 2019, 7:28 am
Forum: Arcade Games
Topic: DDR Cabs
Replies: 5
Views: 651

DDR Cabs

Hi, Think I'm starting my mid-life crisis phase :awe: and for some reason have decided I want to get a DDR machine. Wife & kids are up for it, but I'm not sure which I should be looking for. Can I buy an early version and use later software, or buy a later one and use earlier versions? Just want the...
by dj_johnnyg
April 17th, 2019, 7:17 am
Forum: Cabinet Q&A
Topic: Light-gun Screen Height
Replies: 0
Views: 211

Light-gun Screen Height

Not sure if this should go here, or not... I've managed to score a 29" 4:3 CRT for $10, and the main use will be for light-gun games using consoles. What sort of height should I have the screen for stand-up use? I'm planning to knock up a stand for the CRT, but don't have anything I can use to tempo...
by dj_johnnyg
March 26th, 2019, 12:03 am
Forum: Cabinet Q&A
Topic: Linking Sega JVS I/O 837-13551
Replies: 18
Views: 1325

Re: Linking Sega JVS I/O 837-13551

SUCCESS!!!! :awe: :awe: :awe: :awe: :awe: :awe: :awe: :awe: :awe: :awe: :awe: I would like to take this opportunity to announce my nomination for knobhead of the year. So, I've been scratching my head as to why after bypassing the P2 Down input on the Faulty I/O was stopping the same input on the go...
by dj_johnnyg
March 25th, 2019, 9:28 pm
Forum: Cabinet Q&A
Topic: Linking Sega JVS I/O 837-13551
Replies: 18
Views: 1325

Re: Linking Sega JVS I/O 837-13551

OK, Now I am totally confused :eh: I've tried a quick & dirty fix on the IO with the stuck P2 down input, by cutting the trace out of the Opto-isolator. In the JVS test, I now see the input is at 0, and the P1 inputs test fine on both JVS nodes. What is confusing the hell out of me now is that when ...
by dj_johnnyg
March 24th, 2019, 10:52 pm
Forum: Cabinet Q&A
Topic: Linking Sega JVS I/O 837-13551
Replies: 18
Views: 1325

Re: Linking Sega JVS I/O 837-13551

So had a bit of a prod around, but not much to tell while it's not powered on. I'm suspecting that the opto-coupler is duff, but will need to test that while I've got power going through the I/O and see what the other pins are up to under "normal" operation. At this point (assuming the opto is the i...