shmups.system11.org

Shmups Forum
 
* FAQ    * Search
 * Register  * Login 
It is currently Fri Apr 10, 2020 12:41 pm View unanswered posts
View active topics



Post new topic Reply to topic  [ 2 posts ] 
Author Message
 Post subject: Satunr S/PDIF Mod, Video Interference Until I GND to Chassis
PostPosted: Thu Feb 13, 2020 10:12 pm 



Joined: 23 Jan 2014
Posts: 56
I was just troubleshooting my Saturn S/PDIF mod which works correctly (in terms of sound) but seems to add some rolling interference into the RGB signal. Its most noticeable on the screen where you input the time and date. Its like a horizontal curvy black lines dancing left and right. I found that if ground the pins on the power board (where I'm grabbing GND and 5V for the mod/ and RCA connector) to the chassis it goes away. It also goes away if I unplug the RCA cable. Maybe I'm overthinking it if grounding to the chassis clears up the issue, but I'm wondering if this is the best idea in the long run?


Top
 Offline Profile  
 
 Post subject: Re: Satunr S/PDIF Mod, Video Interference Until I GND to Cha
PostPosted: Fri Feb 14, 2020 8:11 pm 



Joined: 23 Jan 2014
Posts: 56
Well I found the issue. It only happens with the S/PDIF mod shares 5V with an older mod chip. I decided to upgrade to the phantom anyway, getting that modchip working again if you unseat it is an exercise in frustration.


Top
 Offline Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 2 posts ] 

All times are UTC


Who is online

Users browsing this forum: Gunstar, mario64, Overkill, Ryoandr and 9 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum

Search for:
Jump to:  
Space Pilot 3K template by Jakob Persson
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group