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DIY For Audio
Musical Fidelity F15 repair "nightmare"
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<blockquote data-quote="handsome" data-source="post: 1028973" data-attributes="member: 772"><p>So you know it is the poweramp not the preamp. You have one working channel so you can use that board as a reference. I would measure voltages on each board and compare - you want to <em>isolate</em> where the issue is. Start by measuring the voltage across all the green resistors. Then the voltages at the driver transistors etc. Dont bother measuring the value of the components - you want measure ?what the electricity is doing? Because you have a working channel you should be able to pinpoint the problem area with just a multimeter. Once you do - then draw a schematic and you should be able to see what has gone wrong....</p></blockquote><p></p>
[QUOTE="handsome, post: 1028973, member: 772"] So you know it is the poweramp not the preamp. You have one working channel so you can use that board as a reference. I would measure voltages on each board and compare - you want to [i]isolate[/i] where the issue is. Start by measuring the voltage across all the green resistors. Then the voltages at the driver transistors etc. Dont bother measuring the value of the components - you want measure ?what the electricity is doing? Because you have a working channel you should be able to pinpoint the problem area with just a multimeter. Once you do - then draw a schematic and you should be able to see what has gone wrong.... [/QUOTE]
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DIY & Tutorials
DIY For Audio
Musical Fidelity F15 repair "nightmare"
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