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DIY For Audio
Musical Fidelity F15 repair "nightmare"
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<blockquote data-quote="Gerlach" data-source="post: 1028923" data-attributes="member: 18948"><p>Wow!! Ian!!!! welcome back man!! I was actually checking all your speaker builds this week because i'm planning to do my own diy build. </p><p></p><p>[member=3]JimGore[/member] I basically copy the complete left side over to the faulty right side, everything, including new transistors and we know they not cheap. There was one faulty transistor that i picked up before replacing them, it showed closed circuit when i tested it out if the board. </p><p></p><p>On the trim pod part, jip, there is one. when i first got the unit, it showed close to 15 -16v on the the speaker output, when adjusting it, it will go down max to say 12 - 13v. when i replaced everything, i switch it on and it was showing close to 6v volts and trim it back close to 2-3v and in that time say 30sec when the relay close "it's got a valve pre input that warms up", then dc volts will run all over the show. it will go from -V to close to 26+v and flex up and down. </p><p></p><p>i will take some close photos of the PSU and Pre Part. </p></blockquote><p></p>
[QUOTE="Gerlach, post: 1028923, member: 18948"] Wow!! Ian!!!! welcome back man!! I was actually checking all your speaker builds this week because i'm planning to do my own diy build. [member=3]JimGore[/member] I basically copy the complete left side over to the faulty right side, everything, including new transistors and we know they not cheap. There was one faulty transistor that i picked up before replacing them, it showed closed circuit when i tested it out if the board. On the trim pod part, jip, there is one. when i first got the unit, it showed close to 15 -16v on the the speaker output, when adjusting it, it will go down max to say 12 - 13v. when i replaced everything, i switch it on and it was showing close to 6v volts and trim it back close to 2-3v and in that time say 30sec when the relay close "it's got a valve pre input that warms up", then dc volts will run all over the show. it will go from -V to close to 26+v and flex up and down. i will take some close photos of the PSU and Pre Part. [/QUOTE]
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DIY & Tutorials
DIY For Audio
Musical Fidelity F15 repair "nightmare"
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