Re: Technics SU-V60. Voltage regulator
I've fitted the two FET's and both the supplies have come to normal levels. In the Voltage Control amp, Q417 was s/c collector-emitter, it's 2.2ohm emitter resistor had risen to 6ohms. These have also been replaced. At the mid point of each Voltage control amp I have now 6.2V. This should be 0v, but as both channels exhibit the same characteristic with the power amp Ic removed, I can only assume that this is correct.
Next step, to refit the power amp IC, then gently power on with a lamp limiter and variac...
SJM.
Last edited by samjmann; 14th Apr 2019 at 7:10 pm.
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