Musical Fidelity B1 amp transformer problem. - diyAudio
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Old 25th May 2008, 08:03 PM   #1
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Default Musical Fidelity B1 amp transformer problem.

Hi,
I wonder if anyone can help me. My old Musical Fidelity B1 integrated amp has stopped working.
I don't know much about electronics but a poke about with my multimeter tells me that there is power going into the toroidal transformer but nothing coming out so I'm assuming it is that which has failed.
I know nothing about transformers so am stuck as far as replacing it in that I haven't a clue which one to buy. If I give the details of the original would someone please be able to tell me the right type and rating of replacement to get. It is made by ILP, has two wires in and three out, and the label says Type 30054, serial no. 23169.
Any advice would be much appreciated!
Ian
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Old 26th May 2008, 05:49 PM   #2
gootee is offline gootee  United States
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Depending in the power supply circuit, you might also need to suspect some other components. I usually tend to try to blame any electrolytic capacitors, first, then rectifiers, then transformers. Is anything getting hot?

With power off and disconnected (and caps discharged 'manually'), you can measure the resistances across the various power supply components, looking for shorts and opens. Maybe a diode or rectifier bridge has become shorted.
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The electrolytic capacitors ARE the signal path: http://www.fullnet.com/~tomg/zoom3a_33kuF.jpg
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Old 26th May 2008, 08:00 PM   #3
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Many thanks for the advice Tom. Amp not powering up so don't know if anything was getting hot. I can detect power going into the transformer but nothing the other side of it. Don't know how to discharge caps so have done no testing of other components.
Ian
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