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DIY For Audio
Musical Fidelity F15 repair "nightmare"
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<blockquote data-quote="handsome" data-source="post: 1028941" data-attributes="member: 772"><p>Remove the audio inputs to the two output boards. That will isolate your valve stage from your power stage. If the problem persists its the output stage and probably not the valve stage.... If the voltages are fluctuating something may be oscillating - you will need to a scope to investigate more thoroughly. If a resistor is smoking something has shorted - you need to ascertain what that resistor is connected to - best thing to do is draw out the schematic from the diagram that you have. Then measure both channels and mark on your schematic voltages for both channels - problems should then be a bit more obvious as to exactly where and hat is affected.</p></blockquote><p></p>
[QUOTE="handsome, post: 1028941, member: 772"] Remove the audio inputs to the two output boards. That will isolate your valve stage from your power stage. If the problem persists its the output stage and probably not the valve stage.... If the voltages are fluctuating something may be oscillating - you will need to a scope to investigate more thoroughly. If a resistor is smoking something has shorted - you need to ascertain what that resistor is connected to - best thing to do is draw out the schematic from the diagram that you have. Then measure both channels and mark on your schematic voltages for both channels - problems should then be a bit more obvious as to exactly where and hat is affected. [/QUOTE]
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DIY & Tutorials
DIY For Audio
Musical Fidelity F15 repair "nightmare"
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