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Thread: CPS2 loses audio after warm

  1. #1
    Member ovalfastlx's Avatar
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    CPS2 loses audio after warm

    I have ssf2t B board with matching USA A board. I changed the battery battery on game, since it had the original battery. After, I noticed that the sound would start to cut out and just come back sometimes. Something that sounds like a loose wire when the audio did come back. This happened last night. Today I decided to check it and plugged the game in my Astro City. Sound was working again perfectly until about 20mins or so of Playing, it cut out again. Any ideas on what to check?

    I'm thinking it's heat related, or did I messed up something when I opened the B board?


    The A board looks dusty, but I will need to remove capcom pin to clean it well.

    Thanks guys for any input.

  2. #2
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    Obvious things:

    1. Check that the boards are mated correctly
    2. Check for acid damage (or soldering mishaps) around the battery
    3. Check that the sound ROMs are seated (?)

    (Just general guesses - I'm not a CPS2 expert.)
    I turned off signatures. So should you.

  3. #3
    Member ovalfastlx's Avatar
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    I checked and reseated both boards and still no change. No acid damage, original battery was still working, very clean B board.

    Going to Google the location of sound roms, this is my only CPS2 game, so I don't have an extra A board to test B Board. Prolly will have to buy one. The game plays great other than the sound cutting out.

  4. #4
    Formerly Raz_Hoe.
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    Could be the A Board. Did you try plugging in some speaker/s to the Stereo Jacks on the A Board? Is the Fan Working on the A board?

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    You try resetting the audio levels? Here is a quote from channelmaniac

    Before you condemn the board, push the volume down button on the A board and hold it down while you power it up. Keep holding it down until you see the splash screens come up.

    THEN try to adjust the volume.


    he spends hundreds on scarves, of course he's a fag and then ChuChu Flamingo preserved the aftermath in a plastic case making sure it wasn't exposed to unstable air
    You're just upset that you're too goddam stupid to understand the games and whiff infinites.

  6. #6
    Member ovalfastlx's Avatar
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    Quote Originally Posted by RAZO View Post
    Could be the A Board. Did you try plugging in some speaker/s to the Stereo Jacks on the A Board? Is the Fan Working on the A board?
    No sound coming from the RCA Jacks. And yes the fan is working.

  7. #7
    Member ovalfastlx's Avatar
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    Quote Originally Posted by ChuChu Flamingo View Post
    You try resetting the audio levels? Here is a quote from channelmaniac
    I tried resetting the audio and no luck.
    Last edited by ovalfastlx; 11-26-2017 at 02:05 PM.

  8. #8
    Mr Big's Escort
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    Quote Originally Posted by ovalfastlx View Post
    No sound coming from the RCA Jacks. And yes the fan is working.
    Did you set it to stereo mode in test menu?

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    Member ovalfastlx's Avatar
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    Quote Originally Posted by kuze View Post
    Did you set it to stereo mode in test menu?
    Tried both, stereo and mono. I'm going to buy another A board or maybe both A & B since this is my only CPS2 game.

  10. #10
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    Quote Originally Posted by ovalfastlx View Post
    Tried both, stereo and mono. I'm going to buy another A board or maybe both A & B since this is my only CPS2 game.
    Good plan.

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    Member ovalfastlx's Avatar
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    Quote Originally Posted by Xian Xi View Post
    Itís the output caps, charging and discharging really slow.
    Can you guide me on what capacitor to try first? Thanks.

  13. #13
    JammaNationX
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    Quote Originally Posted by ovalfastlx View Post
    Can you guide me on what capacitor to try first? Thanks.
    I would just change them all in the A board sound section.

  14. #14
    Member ovalfastlx's Avatar
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    Update*

    So I replaced all the caps in the sound area of the A board and still no sound. So, I tried searching for CPS2 A board schematics but was not able to find any info. Anyone have one ? Thanks

    Sent from my SM-G930T using Tapatalk

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    Member ovalfastlx's Avatar
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    Quote Originally Posted by Xian Xi View Post
    Check the sound CPU if it gets really hot, if it does, that could be the problem.
    That would be z80? Or the one with the heat sink? Thanks

    Sent from my SM-G930T using Tapatalk

  17. #17
    JammaNationX
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    Quote Originally Posted by ovalfastlx View Post
    That would be z80? Or the one with the heat sink? Thanks

    Sent from my SM-G930T using Tapatalk
    Z80, the other is the sound amp.

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