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Recent content by unrealpower

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    Macintosh SE PSU 820-0385-A R309 Value

    I am trying to repair a 820-0385-A PSU. However, the casing for resistor R309 is gone and the resistor is a dead short. Does anyone know what the value of this resistor is? Also, what is the black mold-like corrosion on the bottom of the PCB?
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