Macintosh SE PSU 820-0385-A R309 Value

[unrealpower]

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?

 

[poyu_c]

Sorry to resurrect an old thread... did you ever find out what value this is?

 

[dramirez]

SE/30 Power Supply: Recap or ATX?

Use the SONY CR-44 PSU as a frame of reference for the voltages and minimum Current output you will need: +5V: 6.0A +12V Sweep: 1.25A +12V Disk: 2.1A -12V: 0.5A Sweep and Disk are not isolated, so you could drive both with a single +12V power line rated at 3.35A or higher. And no, a -12V...

68kmla.org

 

[poyu_c]

SE/30 Power Supply: Recap or ATX?

Use the SONY CR-44 PSU as a frame of reference for the voltages and minimum Current output you will need: +5V: 6.0A +12V Sweep: 1.25A +12V Disk: 2.1A -12V: 0.5A Sweep and Disk are not isolated, so you could drive both with a single +12V power line rated at 3.35A or higher. And no, a -12V...

68kmla.org

Thanks for the link, I saw this post but the answer wasn't definite. I just ordered the caps for them and was lucky enough to score a Sony power supply from eBay, probably end up using that anyway.