From a good friend I was given a Rohde & Schwarz SMDU which needed some love and care.
Martin, DL8RI, did a phenominal job in documenting his SMDU repair work on this website:
I followed a lot of the work he did. In my SMDU the two main problems were a faulty power supply and the famous power switch that didnt work anymore.
The repair of my SMDU Power Supply
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The repair of my SMDU Power Switch
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