supergun rolling picture / sync problems

Everything Supergun related
Post Reply
User avatar
mx5dob
Posts: 18
Joined: January 10th, 2019, 12:41 pm
Location: Teesside
eBay: mrpauldobson
Initials: dob

supergun rolling picture / sync problems

Post by mx5dob »

Hi all. Im attempting to play 2 vertical jamma pcbs on my supergun:

https://www.smallcab.net/smallcab-super ... anguage=en

But the screen constantly rolls and wont keep still. There doesn't seem to be any way to adjust the vertical/horizontal hold on the supergun and i'm using a standard CRT tv so I can adjust any pots on that.
Can anyone suggest a 'plug and play' solution? (i'm not technically minded enough to mod the supergun)

Something like this that would attach between the supergun and jamma pcb:

https://translate.google.co.uk/translat ... &sandbox=1

or even a scart cable with adjustable pots...

Thanks,
Paul
User avatar
JoeAwesome
Posts: 39
Joined: February 4th, 2019, 5:02 pm
Location: TX
eBay: aniousjoe
Initials: JOE

Re: supergun rolling picture / sync problems

Post by JoeAwesome »

What games? Raiden?
User avatar
mx5dob
Posts: 18
Joined: January 10th, 2019, 12:41 pm
Location: Teesside
eBay: mrpauldobson
Initials: dob

Re: supergun rolling picture / sync problems

Post by mx5dob »

Hi. It's last duel by capcom.and thunder Dragon by nmk
User avatar
JoeAwesome
Posts: 39
Joined: February 4th, 2019, 5:02 pm
Location: TX
eBay: aniousjoe
Initials: JOE

Re: supergun rolling picture / sync problems

Post by JoeAwesome »

It's probably not the refresh rates.

Are the PCBs getting 5v, or thereabouts? Does the CRT have any issues with other vertical games, or even horizontal games when the CRT is rotated? I wonder if the CRT has issues with the rotation.
User avatar
mx5dob
Posts: 18
Joined: January 10th, 2019, 12:41 pm
Location: Teesside
eBay: mrpauldobson
Initials: dob

Re: supergun rolling picture / sync problems

Post by mx5dob »

They are getting 5v and my other vertical pcbs work fine (raiden fighters, esp ra.de and sonic wings)

any other ideas?
User avatar
SuperPang
Master or Universe
Posts: 10048
Joined: August 16th, 2008, 2:45 pm
Location: UK
Contact:

Re: supergun rolling picture / sync problems

Post by SuperPang »

It might be worth looking for a Sony PVM or similar locally as I believe they have V-Hold pots.
User avatar
mx5dob
Posts: 18
Joined: January 10th, 2019, 12:41 pm
Location: Teesside
eBay: mrpauldobson
Initials: dob

Re: supergun rolling picture / sync problems

Post by mx5dob »

cool. Getting a PVM is on the cards anyway :)
Post Reply