Jamma not working with mvs
- willynilly
- Please Continue...
- Posts: 59
- Joined: November 18th, 2010, 11:56 pm
- Location: Birmingham
- eBay: snotsluper
Jamma not working with mvs
Hi guy's. I am a bit of an arcade noob so be gentle please. My problem is this / Ive just got my self a net city arcade cab with a pcb game wrestlefest. Anyway this game works fine with no problems but when i plug in my MVS 1 slot it wont even come on! Just get a garbled screen of doom. It works fine in my old cab. Also none of my CPS2 games work either! There seems to be a few wires missing from the JAMMA connection. There's about 7 spare wires not doing nothing!( just hanging) Do they need connecting? thanks for your help in advance chaps
- thechop
- Not as old as Ralph
- Posts: 1262
- Joined: August 24th, 2008, 1:17 pm
- Location: Wubbly Wolverhampton.
Re: Jamma not working with mvs
You need a Jamma pinout diagram and to check on that whats missing on your jamma harness.
kernow wrote:
Cmon chop I wanna see your manly bricklayer arms.
Cmon chop I wanna see your manly bricklayer arms.
- FrancoB
- J+ member of the year finalist!
- Posts: 4758
- Joined: June 8th, 2009, 10:42 pm
- Location: Oxfordshire
- eBay: francosquashking
- Initials: FRN
Re: Jamma not working with mvs
Jamma pinout here if it helps
- LoRez
- Posts: 612
- Joined: August 17th, 2008, 4:05 pm
- Location: UK
Re: Jamma not working with mvs
Ah,so you bought that one in Fleet,I came very close myself.You local?
- willynilly
- Please Continue...
- Posts: 59
- Joined: November 18th, 2010, 11:56 pm
- Location: Birmingham
- eBay: snotsluper
Re: Jamma not working with mvs
hi ya matey. Yes thats the one. Loverly machine and chuffed to bit's with it. I'm in brum and what a mission to go down and get it, fog last night was real bad.LoRez wrote:Ah,so you bought that one in Fleet,I came very close myself.You local?
Do you have an idea why my MVS wont work! theres got to be a wire off some where. That diagram above is goblygook to me I did say I was a noob
- cools
- Armed Police Buttrider
- Posts: 13459
- Joined: August 17th, 2008, 4:49 pm
- Location: Wales, United Kingdom
- eBay: hordarian
- Initials: CLS
- thechop
- Not as old as Ralph
- Posts: 1262
- Joined: August 24th, 2008, 1:17 pm
- Location: Wubbly Wolverhampton.
Re: Jamma not working with mvs
Perhaps a few pics would help? maybe of the topside and bottom side of the jamma harness, could see what wires are where then.willynilly wrote:hi ya matey. Yes thats the one. Loverly machine and chuffed to bit's with it. I'm in brum and what a mission to go down and get it, fog last night was real bad.LoRez wrote:Ah,so you bought that one in Fleet,I came very close myself.You local?
Do you have an idea why my MVS wont work! theres got to be a wire off some where. That diagram above is goblygook to me I did say I was a noob
kernow wrote:
Cmon chop I wanna see your manly bricklayer arms.
Cmon chop I wanna see your manly bricklayer arms.
- willynilly
- Please Continue...
- Posts: 59
- Joined: November 18th, 2010, 11:56 pm
- Location: Birmingham
- eBay: snotsluper
Re: Jamma not working with mvs
http://img403.imageshack.us/i/jamma5x.jpg/"
http://img593.imageshack.us/img593/3823/jamma4.jpg"
http://img525.imageshack.us/img525/4780/sdc10724b.jpg"
Heres some pics chaps. Hope someone can help Thanks guys.
http://img593.imageshack.us/img593/3823/jamma4.jpg"
http://img525.imageshack.us/img525/4780/sdc10724b.jpg"
Heres some pics chaps. Hope someone can help Thanks guys.
- grantspain
- Tech Head
- Posts: 4824
- Joined: August 17th, 2008, 4:23 pm
- Location: down south
Re: Jamma not working with mvs
that's a new chinese jamma loom-they do not have the video ground on pin 14,they just link to the power ground
this may be causing the problem-some boards seem to run fine on power ground whilst others are particular on pin 14
try moving the video ground to pin 14 first and see what happens
this may be causing the problem-some boards seem to run fine on power ground whilst others are particular on pin 14
try moving the video ground to pin 14 first and see what happens
- Rossyra
- Supermod
- Posts: 7902
- Joined: February 12th, 2009, 1:24 am
- Location: UK
Re: Jamma not working with mvs
could possibly be a low 5v as well
- willynilly
- Please Continue...
- Posts: 59
- Joined: November 18th, 2010, 11:56 pm
- Location: Birmingham
- eBay: snotsluper
Re: Jamma not working with mvs
O.k thanx guys. So what wire (colour) do I move where?
- willynilly
- Please Continue...
- Posts: 59
- Joined: November 18th, 2010, 11:56 pm
- Location: Birmingham
- eBay: snotsluper
Re: Jamma not working with mvs
Is there anyone local to me that could sort this out chaps? I'll pay you and plenty of tea to keep you going just don't want to mess this up. I'm in brum, bounville.
- idc
- Ralf Little impersonator
- Posts: 1311
- Joined: October 16th, 2008, 9:17 pm
- Location: Tamworth, Staffordshire
- eBay: iancourt
- Initials: IAN
- Contact:
Re: Jamma not working with mvs
Note: If I've made any errors, someone please step in and point them out! - Cheers.
Right, looking at your pics, I think this is what you need to do.
You should have a bundle of five video wires coming from your monitor (in addition to the power wires - don't mess with those!)
These five wires should be red, green, blue, white and black. The red, green, blue and white wires are already in the right places.
However, the black video ground wire isn't connected to pin 14, marked in pink, where it should be. Instead, pin 14 is empty, and the video ground wire is probably within one of the groups of black wires to the left or the right of the connector, marked as "power ground". You need to find which of the black wires is the one that's bundled with the red, green, blue and white monitor wires. Then you need to de-solder it from wherever it's connected and relocate it to pin 14.
Right, looking at your pics, I think this is what you need to do.
You should have a bundle of five video wires coming from your monitor (in addition to the power wires - don't mess with those!)
These five wires should be red, green, blue, white and black. The red, green, blue and white wires are already in the right places.
However, the black video ground wire isn't connected to pin 14, marked in pink, where it should be. Instead, pin 14 is empty, and the video ground wire is probably within one of the groups of black wires to the left or the right of the connector, marked as "power ground". You need to find which of the black wires is the one that's bundled with the red, green, blue and white monitor wires. Then you need to de-solder it from wherever it's connected and relocate it to pin 14.
Last edited by idc on November 27th, 2010, 11:56 am, edited 1 time in total.
- stri9ker
- Please Continue...
- Posts: 16
- Joined: November 21st, 2010, 9:12 pm
- Location: Birmingham west midlands
- eBay: yeschap
- Initials: pal
Re: Jamma not working with mvs
Hell is that you johnny 5 from 80,s throwbacks ?
how are you buddy its sir of sirs here , just got ya self a candy cab , about time )
how are you buddy its sir of sirs here , just got ya self a candy cab , about time )
- willynilly
- Please Continue...
- Posts: 59
- Joined: November 18th, 2010, 11:56 pm
- Location: Birmingham
- eBay: snotsluper
Re: Jamma not working with mvs
Oh yes oh yes chaplin of the moorsstri9ker wrote:Hell is that you johnny 5 from 80,s throwbacks ?
how are you buddy its sir of sirs here , just got ya self a candy cab , about time )
- willynilly
- Please Continue...
- Posts: 59
- Joined: November 18th, 2010, 11:56 pm
- Location: Birmingham
- eBay: snotsluper
Re: Jamma not working with mvs
Just tried another pcb (final fight) and it dont want to know!
Last edited by willynilly on November 23rd, 2010, 7:43 am, edited 1 time in total.
- thechop
- Not as old as Ralph
- Posts: 1262
- Joined: August 24th, 2008, 1:17 pm
- Location: Wubbly Wolverhampton.
Re: Jamma not working with mvs
Just take your time and follow idc's instructions to the letter and it could be solved easy peasy
kernow wrote:
Cmon chop I wanna see your manly bricklayer arms.
Cmon chop I wanna see your manly bricklayer arms.
- willynilly
- Please Continue...
- Posts: 59
- Joined: November 18th, 2010, 11:56 pm
- Location: Birmingham
- eBay: snotsluper
Re: Jamma not working with mvs
Update on the problem. Ive managed to connect a ground straight from the PSU to pin 14 and all is well chaps. Thankyou for your help along the way
- thechop
- Not as old as Ralph
- Posts: 1262
- Joined: August 24th, 2008, 1:17 pm
- Location: Wubbly Wolverhampton.
Re: Jamma not working with mvs
I knew you could do it
kernow wrote:
Cmon chop I wanna see your manly bricklayer arms.
Cmon chop I wanna see your manly bricklayer arms.
- idc
- Ralf Little impersonator
- Posts: 1311
- Joined: October 16th, 2008, 9:17 pm
- Location: Tamworth, Staffordshire
- eBay: iancourt
- Initials: IAN
- Contact:
Re: Jamma not working with mvs
Oh sweet, glad you got it sorted mate! Nice one!willynilly wrote:Update on the problem. Ive managed to connect a ground straight from the PSU to pin 14 and all is well chaps. Thankyou for your help along the way