Help With NES PPU Problem

Discussion in 'Nintendo Game Development' started by pedro, Sep 17, 2011.

  1. pedro

    pedro Spirited Member

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    Hi there guys i have this NES with PPU problems for quite some time, and recently i wanted to buy a new one so i opened here on the foruns a WTB topic, now the user Calpis asked me about the problem and as i didnt know much about it, just that was a PPU problem i showed him these pictures.

    [​IMG]

    [​IMG]

    Now after showing these images he said that most likely there was an adress line from the ppu A8 pin to the sram pin 23 i tested for continuity and it was positve.

    I also noticed that there were some corroted traces under the sram, but a quick test of continuity told me that there were no problems on those, so i ask, is there a fix here or i need a new NES?

    UPDATE: STATUS REPORT

    1º Corroted Traces not a problem.

    2º PPU Pin 30 to Vram Pin 23 - OK

    3º PPU Pin 25 to Inverter Pin 3A/5 - OK

    4º Inverter Pin 3Y/6 to Cart slot - OK

    5º PPU Pin 24 to Vram Pin 20 - OK

    Thank you for your time.
     
    Last edited: Sep 18, 2011
  2. pedro

    pedro Spirited Member

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    Status Report added with new info.
     
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