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Post originale di: Abrsvc ,

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If I recall correctly, both inputs feed op amp circuits (4558 ICs I think).  I would check those first.  I have seen these fail relatively commonly.  This will involve removing the unit from the cabinet. Follow the circuit from the input jack to locate the IC.  It should be an 8-pin IC with the number 4558 on it.

Update this with any progress you make.

Dan

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