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Old 3rd Nov 2021, 12:13 pm   #14
ms660
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Join Date: Apr 2011
Location: Cornwall, UK.
Posts: 12,164
Default Re: Grundig TK27 - Low audio output

Quote:
Originally Posted by Phantomrose1999 View Post
Measured the resistance from the black wire in free air, to PIN 3 of the voltage board, and its 46.x ohms.

So now i am sure this black wire must be connected to PIN5

Bed time, so will try it tomorrow hopefully..
That resistance measurement tallies up with what's given in the manual, and in the schematic the Black wire does connect to the Pink motor wire and tag 5 on the voltage selector, which would mean that with the Black wire disconnected and the voltage selector set to say 240V that only the 130V section of the transformer would be powered and it would be powered via the motor, that on the face of it might account for the low HT secondary AC voltage.

Lawrence.
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