Recent content by AngelB

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    Behringer schematic versus actual board

    Looks like the revision J I found is illegible, but I’ll keep searching. Thanks
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    Behringer schematic versus actual board

    Damned if I’m not luckier than I know. Someone posted it on Scribd and I managed to snag a photo of it, just a second ago. I hunted for three weeks just to find revision F. Thanks for the info and advice, Harald. It’s still going to be a complicated project but having the right schematic will...
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    Behringer schematic versus actual board

    Looks like the board is revision J. I don’t know if it will be available. I had a heck of a time finding the one schematic for revision F
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    Behringer schematic versus actual board

    So far I’ve found one resistor and two diodes that aren’t the same on the board as the schematic, though the diodes are the same as the voltage marked on the board. I’m amazed it worked for as long as it did. They installed 15V 1W Zener diodes where the schematic calls for a 1N4007 1000V 1A...
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    Behringer schematic versus actual board

    Here is the board.
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    Behringer schematic versus actual board

    I’m a musician who has been out of work due to covid so I’ve been repairing old gear that has been sitting under my work bench. I’m down to the last item, a Behringer K1800FX keyboard amp. I have the schematic, but the board is burnt through. I’d replace it but Behringer is notorious for having...
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    Vef Sigma 260 1982. No sound .

    Can you upload photos?
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    15 V zener diode replacement

    The opposite side of the board appears to have a duplicate set of diodes, as well as duplicating the resistors, that giant cap, and two mosfets.
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    15 V zener diode replacement

    Okay, I have a similar problem, though I have a schematic to work with. I know the old diode is labeled PH C15 but I’m not sure what wattage. I was advised by an engineer friend to order a 15V 500mw replacement, but it’s half as thick as the original, so I’m thinking I need a 1W instead. I’m...
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