PSone chirping with ONEchip.

Discussion in 'Sony PlayStation 1 & 2' started by Armadillo, Oct 21, 2016.

  1. Armadillo
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    Armadillo GBAtemp Psycho!

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    Aug 28, 2003
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    So, I've got a PAL Psone, that makes what is best described as a chirping sound when the chip is installed or more specfically, when point #6 is attached.

    As soon as the laser focuses on the disc, the constant chirping starts. I even grabbed a recording of it https://instaud.io/zDF, the constant sort of zzz,zzz,zzz,zzz is the problem noise.

    I did find another with the same problem here http://assemblergames.com/l/threads/psone-laser-louder-after-mod-chip-install.50846/ and the suggestion of moving point 6 to the other side of the cap does work, but unfortunately, as the last post says, the PSone then gets very fussy.

    I asked over there as well, and got suggestions of a cap on line 6 and a decoupling cap across the chip, unfortunately it does not clear the issue.

    The only way to get rid of that noise has been:

    Remove the chip (either completely, or just disconnecting power to it).
    Disconnecting connection 6 (obviously stops the chip working).
    Putting wire 6 on the other side of the cap. Works, but the console becomes incredibly fussy with discs.

    It's a V2 PSone, and all posts I can find referencing that stupid noise, seem to concern the V2, so maybe the ONEchip just causes that on V2s. Other than the damn noise, it works perfectly.

    Install:


    [​IMG]

    I've checked every point with a meter, all is well. The chip doesn't obstruct the shielding, everything is fine, the only thing that stops the damn noise is what I put above.

    Do ONEchips just do that on V2 consoles? If not, any suggestions, as it's so annoying.

    Thanks.
     
    Last edited by Armadillo, Oct 21, 2016