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Old 27th June 2007, 11:25 PM   #1
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Default main power transformer for Fisher

Anybody know where to find a main power transformer for a Fisher "Studio Standard" model CA885? The part number is 4-2512-23700, a google search without the dashes turned up one result but, alas, it is no longer available and the site recommends a substitute part which it doesn't provide. I can't find any information about the transformer, either, and neither the shop manual nor the schematic give the output voltage. If I only knew what the output voltage is I could probably find something to replace it with. See the attached pics. Thanks.Click the image to open in full size. Click the image to open in full size. Click the image to open in full size.
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Old 28th June 2007, 10:19 PM   #2
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I take it ,it is 117vac primary , what secondary voltages do you need. And what is the pin spacing measurements.
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Old 2nd July 2007, 07:51 AM   #3
AndrewT is offline AndrewT  Scotland
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Hi,
main power transformer? it looks tiny, is this a pre-amp?
where in the circuit is it fitted?
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Old 2nd July 2007, 11:10 AM   #4
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It's called a main power transformer in the schematic, it provides power to the function control, the remote and the main power relay circuits. There's a much bigger transformer -- the sub power one -- for the main amplifier circuit.
This little transformer turned out not to be the problem with this amp, a 5.6 volt zener diode used as a voltage regulator was the problem, apparently a victim of line voltage surge. Thanks for the replies.
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Old 2nd July 2007, 09:53 PM   #5
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Zener is a hell of alot cheaper than transformer....Good for you..
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