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TonyDuell · 15th Apr 2018, 5:05 pm

If you take a look inside, you should see a mains transformer if the power input connector is for mains. Two wires from the transformer (the primary winding) will connect to the pins of that connector directly (it is very uncommon to have a mains switch or fuse in this sort of cassette recorder).

The other thing to try (without even opening the case) is to measure the DC resistance between the pins of that connector with your multimeter. If it goes to a mains transformer, I would expect a few hundred ohms of resistance between the pins. If it's a DC input, the resistance (with the machine turned off, in stop mode, etc) would be a lot higher, possibly infinite.

15th Apr 2018, 5:05 pm	#12
TonyDuell Dekatron Join Date: Jun 2015 Location: Biggin Hill, London, UK. Posts: 5,224	Re: Bush TP79 cassette If you take a look inside, you should see a mains transformer if the power input connector is for mains. Two wires from the transformer (the primary winding) will connect to the pins of that connector directly (it is very uncommon to have a mains switch or fuse in this sort of cassette recorder). The other thing to try (without even opening the case) is to measure the DC resistance between the pins of that connector with your multimeter. If it goes to a mains transformer, I would expect a few hundred ohms of resistance between the pins. If it's a DC input, the resistance (with the machine turned off, in stop mode, etc) would be a lot higher, possibly infinite.