SCPH-1000 playstation makes terrible noise

Discussion in 'Repair, Restoration, Conservation and Preservation' started by ASSEMbler, Jan 5, 2014.

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  1. ASSEMbler

    ASSEMbler Administrator Staff Member

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    I have a Japanese system, it's an early one with svideo and the cast aluminum spindle.

    Power it on, it makes a constant, terrible screeching noise.

    I swapped the psu to a 120V one, and it made no difference.
     
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  2. HEX1GON

    HEX1GON FREEZE! Scumbag

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    Check the CD assembly?
     
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  3. ASSEMbler

    ASSEMbler Administrator Staff Member

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    It's not a mechanical noise, it's a hardware problem.
     
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  4. DefectX11

    DefectX11 Familiar Face

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    Any hot spots on the motherboard? I'm assuming here that you've got it opened up while having it powered on.
     
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  5. ASSEMbler

    ASSEMbler Administrator Staff Member

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    I opened it and it has a very old 11 wire mod chip on it.

    Think that's the problem?
     
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  6. Mechagouki

    Mechagouki Site Supporter 2013,2014,2015

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    Never even heard of an 11-wire PS1 mdchip. Even if you fix it the discs will slip on that stupid metal spindle, stutter city.
     
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  7. Bad_Ad84

    Bad_Ad84 The Tick

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    Mayumi V2.1 is 11 wires on a PU-8.

    But I would think a SCPH-1000 wouldnt be a PU-8.
     
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  8. ASSEMbler

    ASSEMbler Administrator Staff Member

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    Pu-7, this mod would be from 94-95
     
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  9. silverfox0786

    silverfox0786 Gutsy Member

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    from what I know a screeching noise is when a power line is being grounded, is there a break in a wire that is touching ground


    its basically an IC that is buzzing
     
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  10. ASSEMbler

    ASSEMbler Administrator Staff Member

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    So a reflow might do it. Sadly I don't have the ability to do that here.
     
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  11. HEX1GON

    HEX1GON FREEZE! Scumbag

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    Remove the chip first to debug the sound, that's my personal approach. Unless you're 100% that it's not coming from the chip.
     
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  12. ASSEMbler

    ASSEMbler Administrator Staff Member

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    I stripped the board bare, it's some sort of solder fracture or actual defect.
     
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  13. silverfox0786

    silverfox0786 Gutsy Member

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    looks like you found the issue, but if you hadn't then I was gonna reply, no reflow needed just need to find the short. in your case a dry solder. A buzzing can be associated with a number of things short of IC or short of capacitor which causes the component to buz as power is going where it shouldn't. usually fixing the short fixes the issue as long as the buzzing component has not fried, usually it does not fry as the power is low and hence the buzzing, if it was to fry it would not buz and instead just out right blow
     
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  14. ASSEMbler

    ASSEMbler Administrator Staff Member

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    I don't have the eyes anymore to do this sort of thing.

    I put in a pu-8 I had around.
     
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