PSone chirping with ONEchip.

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

  1. Armadillo

    Armadillo GBAtemp Psycho!

    Aug 28, 2003
    United Kingdom
    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, the constant sort of zzz,zzz,zzz,zzz is the problem noise.

    I did find another with the same problem here 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.



    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.

    Last edited by Armadillo, Oct 21, 2016
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