My DK died. I checked +5, and there was none. I opened up up the power supply (PP-7B), and the magic smoke had been let out of R1 (2W 20 ohm wirewound). I replaced R1 and immediately smoked the replacement. Obviously, I should have investigated further before replacing the resistor.
With the resistor blown, I'm measuring 95VDC across it. Looks like a shorted C6 or C7 would do it, but those appear OK. Maybe a shorted TR1 or TR3?
With the resistor blown, I'm measuring 95VDC across it. Looks like a shorted C6 or C7 would do it, but those appear OK. Maybe a shorted TR1 or TR3?

