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The speaker being disconnected should not hurt the xfmr UNLESS the audio was blasting at such a high level that the xfmr was arcing inside (highly unlikely).
Did you take an up-close whiff of the xfmr? If it's zorched, there'll be a scorched smell coming from it (per the old techie proverb "the nose knows"). And did you verify continuity of both windings with an ohmmeter? The primary should be a few hundred ohms, the secondary a fraction of an ohm.
More than likely the smell was from some other component, probably a resistor that got cooked.
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12-01-2021, 05:04 PM
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