If this is the case replacing the fuse may be all that is necessary. This means it gets hot in use, then cools when the speaker is off, then hot, then cools etc and eventually the wire weakens and breaks. If most of it is still there and there is only a small break in the wire, then perhaps it may have just fatigued from being used at the upper end of its' current rating over a long period of time. ![]() If it has blown (and you can see into the fuse) check if most of the fuse wire is still there and is just broken as opposed to the fuse wire having totally disappeared. If it is a see through "glass tube" type fuse it will be easy to see if it has blown or not. With the mains power totally disconnected from the speakers use an Ohmmeter to check if the fuse is blown. ![]() ![]() Look at the Power supply circuit at the very bottom pf the page you will see the AC supply voltage comes in through a switch and then through a fuse 2A-250 and into the primary side of the power transformer.Įven though your house power supply is 120V AC there is still a 2 Amp 250V rated fuse in the input. The green power light "power supply" is the +/-14V DC supply derived from the +/-26V DC HF power rails.
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