Sansui Au-101 full recap restoration project. Technics SU-X302 replacement of main power thing inside. I dont know what its called sorry but one side of it is dead apparently causing 1 dead channel. I have 2 broken amps that I do not just want to throw away, I am kinda keen on fixing them myself. The first is a Technics SU-X302. Now I don't know a lot about fancy hi-fi gear but I always thought this amp sounded really good. One of the channels went dead and I got someone to look at it who said that and I cant remember exactly what they said the main power thingy half of it was dead causing the dead one channel.. As this is the main thing in the amp Im guessing its not going to be cheap to replace the part and as these amps are not much on ebay i wonder if its worth the hassle. It would be nice to have it back as I have the rest of the system and although I can use the turntable through a dif amp, the Tape deck is redundant without the amp. I'd like that back. So dunno what to do about that. The other amp is a Sansui Au-101. Ive read a zillion posts about this amp, scoured the net for the last 10yrs everytime I think about fixing it. I have hung onto it religiously cause Id like it back. I know its not fancy but I like it. Fortunately I don't think the issues on this one are major. I was planning on doing a full recap on it and I've found blogs about this with lists of required capacitors. Clean it up and replace for new inside. Again this amp is 50/100 on ebay so if its getting fixed I'll have to do it myself I can't afford to get it done by the store, I could buy another one for less. So given these two scenarios what do you think the chances of someone who has zero electric hifi repair experience completing this task. Im not daft and im up for buying the things I need. It would be rewarding to fix these.
It is always good to take on a project from which you will learn a lot
everything is fixable and in the case of electronics it takes a fair amount of electronic knowledge before you begin
You are obviously very keen to do this so you have to start from the right angle to have any chance of success
first you will need a full schematics of the circuitry so that you can see what works what and what is happening after the next component
next get beginner electronic books to get the right ideas and approach because if you know what each component is supposed to do in the circuit it makes it easier to understand a result when you do something
finally all electronic shops uses an oscilloscope when testing circuitry as it shows the wave pattern produced and the voltage after each component
example --- a capacitor shows a stop/ start pattern , ac current shows a wave pattern, dc current a flat line and much more
keep at it but be aware that the project will take time and if you surround yourself with technical publications and the right equipment you will get it working
remember it takes a qualified electronics technician around 5 years of learning to do what you hope to achieve at home
Testimonial: "Cheers Bill. Its just such a shame to abandon them to the depths of a cupboard and eventually the bin when I cant be bothered moving house with them, again. I can replace the Technics on ebay for around £50 and the Sansui £80, so the motivation for fixing is purely for the satisfaction of saving them from an ill fate. Well im not in any rush and I have the space to set it up for the long haul. i have downloaded the schematics fine. Ill see about picking up the basic tools on ebay and make a start. Its been long enough!"
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