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Arcade Collecting => Restorations & repair => Topic started by: piscian18 on June 01, 2019, 01:54:30 pm

Title: Vampire Savior CPS2 board with a melted battery
Post by: piscian18 on June 01, 2019, 01:54:30 pm
Hi, I'm trying to restore a CPS2 arcade cabinet I found. After some researching I opened up the CPS2 cart to find the battery rolling around inside and red dust in the shell. From what it looks like the battery melted at some point and was just left to sit. Thankfully because of the machine orientation it just kind of spilled off the side except the board corner. I ordered an infinikey after some research but after starting to try and clean the board I'm getting cold feet. Can someone take a look at this and offer any advice. I would say my soldering skills are medium. Ive installed modchips and what not but I'm concerned this might need a capacitor replaced in that hole in the corner? I'm assuming thats battery acid? I should use maybe alcohol to clean it off? Otherwise the board looks in pretty good shaped? I really don't much about this stuff. If anyone can even point me at a solid repair service that would be wicked. :P

Title: Re: Vampire Savior CPS2 board with a melted battery
Post by: opt2not on June 01, 2019, 05:00:49 pm
Well, aside from possible acid damage on the traces, thatís the suicide battery. Meaning, even if you repaired the damage, you still have a suicided board. There are key re-encryption methods to desuicide it, but this all might be a bit advanced for you to do.

I would make an account at the arcade-projects or klov forums and ask there. There are guys there that specialize at CPS2 repair/restoration.
Title: Re: Vampire Savior CPS2 board with a melted battery
Post by: piscian18 on June 06, 2019, 11:17:11 am
Just wanted to report in that we fixed it! Cleaned all the acid off and installed infinikey and got it up and running yesterday. The Capacitor next to the battery had to be replaced as well. :)

Now I gotta fix the monitor :(
Title: Re: Vampire Savior CPS2 board with a melted battery
Post by: Mike A on June 06, 2019, 11:28:15 am
Very nice. Another PCB resurrected.
Title: Re: Vampire Savior CPS2 board with a melted battery
Post by: jennifer on June 06, 2019, 05:21:02 pm
I would hope you neutralized that damage with baking soda first before you put that together.
Title: Re: Vampire Savior CPS2 board with a melted battery
Post by: pbj on June 06, 2019, 05:43:51 pm
It's not a car battery, Jennifer.  You'd use vinegar.   :whap

Or just clean it off and move on with life.

Title: Re: Vampire Savior CPS2 board with a melted battery
Post by: opt2not on June 06, 2019, 06:28:21 pm
Now I gotta fix the monitor :(
Probably could use a cap kit.  What model is it?
Title: Re: Vampire Savior CPS2 board with a melted battery
Post by: jennifer on June 06, 2019, 07:17:29 pm
It's not a car battery, Jennifer.  You'd use vinegar.   :whap

Or just clean it off and move on with life.
A base is a base one would assume, I have always used b/soda ,distilled water, a soft nylon brush, with a alcohol rinse, (50 % as 90% seems kinda harsh) it kills it effectively...Moving on, by cutting corners? Over A five minute job non the less? That sounds more like kicking the can down the road...Or perhaps just strait up LAZY.
Title: Re: Vampire Savior CPS2 board with a melted battery
Post by: pbj on June 06, 2019, 09:10:26 pm
Now I gotta fix the monitor :(
Probably could use a cap kit.  What model is it?

Cap kits fix geometry issues.  He needs to adjust the brightness on his flyback.


Title: Re: Vampire Savior CPS2 board with a melted battery
Post by: opt2not on June 06, 2019, 11:30:21 pm
Now I gotta fix the monitor :(
Probably could use a cap kit.  What model is it?

Cap kits fix geometry issues.  He needs to adjust the brightness on his flyback.

Caps can also fix things like:
- won't power up
- won't sync
- won't lock the holds
- colors faded
- vertical collapse

From his photo it looks like thereís a slight vertical collapse. The noise lines could be cap related as well. The B+ might be low too.
I mean, Iíd definitely start with putting high quality caps on there first and go from there.
Title: Re: Vampire Savior CPS2 board with a melted battery
Post by: piscian18 on July 11, 2019, 11:07:15 am
Oops I feel bad I kinda ghosted this topic after I fixed the B-board. If anyones curious this is where we stand -

current image
(https://imgur.com/QrbG9SW)

https://imgur.com/f9TESHp (https://imgur.com/f9TESHp)

Going into this I hadnt soldered anything in years and I have cerebral palsy, my left hand is pretty much a claw so after determining the chassis was a "universal" style I tried replacing it with a couple of those wei-yu chassis. I learned the hard and expensive way those are absolute garbage. I had sorta hoped it was a superiority thing on the forums but no they really were cheap. So cheap they dont even label the sockets. They both worked but the picture was so dim you could only see it in the dark.

I broke down this last week and really retaught myself to solder, happy to say Im quite solid now. Over the last few days Ive recapped most of the board(electrolyics). I have 1 cap minor 4.7 25v to go. Swapping the big 250v 220u fixed the leak causing the waving picture and each cap replacement is progressively brightening and clearing up the picture.


Things I havent done
1. flyback reflow/swap
2. replace one last EL cap its a 4.7 v25 that tested good. Gonna replace it anyway.
3. ceramic caps etc.
4. reflow all connections. Theres a decent amount of corrosion on the board.
4. Rejuvenate the crt

No ones been able to accurately identify this chassis so I had manually list and swap every cap. I'd love to buy a complete cap kit with ceramics etc but I have no idea what I need.

Chassis
https://imgur.com/SV2i33J

Cap list (I have to verify what all I replaced)
1uf - 160v
1uf - 50v x4
4.7uf - 25v
10uf - 250v
22uf - 25v x2
33uf - 25v
47uf - 16v x3
47uf - 35v x1
100uf - 16v x2
47uf - 35v
220uf - 35v
330uf - 50v x2
470uf - 63v x 2
1000uf - 35v x3
10uf - 63v



Title: Re: Vampire Savior CPS2 board with a melted battery
Post by: opt2not on July 11, 2019, 01:19:49 pm
Yup, those universal chassisí are terrible. Glad youíve came to that conclusion, be it the hard way. Sorry to hear that.
Most of the capacitors will have their values listed on the barrel themselves. So you might have to do it the manual way and pull or look at each one, write down their value and the orientation their installed, and order caps individually from a supplier like digikey or mouser.
Title: Re: Vampire Savior CPS2 board with a melted battery
Post by: piscian18 on July 11, 2019, 01:41:51 pm
Yeah I swapped all the caps except this one in CP107. Its a 4.7uf 25v 85c. Id been holding off doing anything with it because it did test good and oddly enough the cap is about 24mm long and every replacement I found online is tiny like 6-10mm. Just going to bite the bullet an swap it.

One thing I didn't do is complete reflow all of the solder on the board. Theres a lot of hard solder and corrosion on the board I could take the time to clean and redo the board.