Street Fighter EX2/ZN-2 Mobo Graphic Glitches

PCB problems and fixes
Forum rules
ArcadeOtaku forum introduction & rules
User avatar
NoAffinity
Posts: 307
Joined: January 8th, 2017, 3:46 pm
Location: Escondido, CA, USA
eBay: noaffinity
Initials: CSG

Street Fighter EX2/ZN-2 Mobo Graphic Glitches

Postby NoAffinity » January 16th, 2018, 5:02 pm

Hey guys, hoping there's some of you out there that are Capcom/Sony/Arika hardware experts. I've got a EX2 and EX2 Plus top board, that I've tested with this motherboard in question, and the result is the same with either top board, so fairly certain it is the motherboard. Please see below video of the graphic glitches. Any suggestions on where to start for repair? I've gone over the mobo with a magnifying glass, and don't see anything standing out that is damaged, obvious cold solder, etc.

https://youtu.be/kJuMtINa-AU

The board was working when I got it from a friend probably 10 years ago, and it worked fine a the time. It sat safely stored away in an anti-static bag, for probably 3-4 years between the last time it ran with no problems and I fired it up to get what you now see.
User avatar
copados33
Posts: 389
Joined: March 20th, 2013, 1:30 pm
Location: Uruguay South America
eBay: psycho-q

Re: Street Fighter EX2/ZN-2 Mobo Graphic Glitches

Postby copados33 » January 16th, 2018, 8:46 pm

Stupid question: have you tried reseating the Rom board?
User avatar
NoAffinity
Posts: 307
Joined: January 8th, 2017, 3:46 pm
Location: Escondido, CA, USA
eBay: noaffinity
Initials: CSG

Re: Street Fighter EX2/ZN-2 Mobo Graphic Glitches

Postby NoAffinity » January 17th, 2018, 2:02 am

As noted, I have 2 top boards - SFEX2 and SFEX2P, and have swapped them with the same result from either. They are firmly seated.
User avatar
chacal
Posts: 98
Joined: January 19th, 2010, 12:49 pm
Location: Thionville (france)
eBay: masacreman

Re: Street Fighter EX2/ZN-2 Mobo Graphic Glitches

Postby chacal » February 5th, 2018, 11:57 am

:D check if there is not a twisted pin on the motherboard slot
and look if there is not a piece of plastic bubble or other under the motherboard ;)

check pin on Sony CXD8661R CPU & Sony CXD8654Q GPU

QFP chips, the pin floating

https://newastrocity.files.wordpress.co ... m-zn-2.png

https://translate.google.fr/translate?h ... D1%26n%3D1
User avatar
NoAffinity
Posts: 307
Joined: January 8th, 2017, 3:46 pm
Location: Escondido, CA, USA
eBay: noaffinity
Initials: CSG

Re: Street Fighter EX2/ZN-2 Mobo Graphic Glitches

Postby NoAffinity » February 5th, 2018, 4:11 pm

Thanks, chacal. I started looking more closely at the board this weekend. I found two surface mount chips with corrosion on the legs. I cleaned up the corrosion, resoldered, and found one of the pins floating. Fortunately I have another ZN-2 motherboard that is in worse shape, but has this area fully in tact. Tracing things out, I reconnected the one floating pin, but it did nothing. I poked at every leg on those QFP chips, to see is any were floating there, but they are all solidly connected. No immediate joy on that one, but I will pursue some of those other areas mentioned at the trouble log link. :)
User avatar
chacal
Posts: 98
Joined: January 19th, 2010, 12:49 pm
Location: Thionville (france)
eBay: masacreman

Re: Street Fighter EX2/ZN-2 Mobo Graphic Glitches

Postby chacal » February 5th, 2018, 4:32 pm

ok good luck :D ;)
User avatar
NoAffinity
Posts: 307
Joined: January 8th, 2017, 3:46 pm
Location: Escondido, CA, USA
eBay: noaffinity
Initials: CSG

Re: Street Fighter EX2/ZN-2 Mobo Graphic Glitches

Postby NoAffinity » February 5th, 2018, 5:08 pm

So, taking a shotgun approach, is it get likely that the issue is at one of these chips: Sony CXD8661R CPU & Sony CXD8654Q GPU?

I was hoping it was similar to the cps1 motherboards and if you see this type of graphical glitch, it's a certain chip that's failing.

I will revisit those 2 chips, and may try swapping them off the other board.
User avatar
chacal
Posts: 98
Joined: January 19th, 2010, 12:49 pm
Location: Thionville (france)
eBay: masacreman

Re: Street Fighter EX2/ZN-2 Mobo Graphic Glitches

Postby chacal » February 7th, 2018, 5:36 pm

Flux and soldering :D
User avatar
NoAffinity
Posts: 307
Joined: January 8th, 2017, 3:46 pm
Location: Escondido, CA, USA
eBay: noaffinity
Initials: CSG

Re: Street Fighter EX2/ZN-2 Mobo Graphic Glitches

Postby NoAffinity » February 7th, 2018, 6:01 pm

chacal wrote:Flux and soldering :D

And hot air if I goes as far as swapping those qfp chips. :awe:
User avatar
pulstar
Posts: 139
Joined: March 9th, 2013, 6:57 pm
Location: Southampton, United Kingdom

Re: Street Fighter EX2/ZN-2 Mobo Graphic Glitches

Postby pulstar » February 7th, 2018, 9:49 pm

It seems that it only occurs on the 2d parts, is that right? Have you verified the RAM ICs are good?

Return to “Game Hardware Q&A”



Who is online

Users browsing this forum: No registered users