Transformer from a Sony Music system

Thread Starter


Joined Jan 13, 2010
Greetings to all the readers,

I have this old Music system Sony MHC RV20, Nothing seems to be working in it (tuner, cd, cassette etc) except it has a great working Transformer and a amp board which is also in good working condition.

I wanted to to use the transformer from this system in my other DIY amplifier project, the only thing is i dont know is how to figure out the primary voltage inputs in this transformer. The secondary outputs are 19.5VAC, 40VAC, GND, 40VAC, 19.5VAC.

Please let me know what information would you guys like me to add in this post, so that it would be much easier for you guys to help me out.

Best regards,
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