• Restoration of the power supply

    Lauri Pirttiaho • 2 days ago • 0 comments

    The restoration of a computer often begins with the power supply. It is critical not to turn on the potentially degraded and fragile device until the safety of the power supply and the other circuitry has been verified to not contain shorted components, especially the electrolytic and other capacitors. There is also a chance there are degraded solderings which may trigger a major destruction rare or unobtainable components.

    The first step in this project was to take out the power supply and verify that it is wired for the correct voltage (220V for Europe). 

    Though a bit unorthodox, also the PH-163 power cord receptacle was changed to a modern IEC C8 one for which cables are available. 

    The original socket will be saved for a chance that the fitting plug becomes available.

    The next step is to get familiar with the power supply. Though the CDP18S030 manual has the schematics and component layout of the logic board, the only thing about the power supply is the instructions for the voltage selector wiring.

    Therefore the next step is to draw the circuit diagram of the power supply.