This video was exactly what I needed! I have an SU-V505 displaying an almost identical problem. A quick spray of contact cleaner (well, WD-40) in all the selector switches and a few toggles and it's back to working perfectly. Thanks so much!
I've serviced plenty of these and they're a great amp. I have its big brother, the SU-V707 (90 watts per channel) on my bench at the moment. Discrete output stage, a real beast. The solution to your broken actuator strip is to find a donor amp for parts - you won't find a new replacement part. Take the whole switch / strip / front panel shaft unit out as one assembly and replace it. Don't try to dismantle the strip from the switch, it won't end well. Trust me on this!
I broke the same cable whilst repairing an SU-V4. The cable had seized and the cog was slipping, even taking care I managed to snap the ribbon. Nasty design
Great video! Pity about the switch,.. it happens sometimes. Perhaps you could do a small modification with a different switch mounted behind the front panel, while running 'jumber' cables from the inactive switch? Just a thought! Keep up the great work Simon.
Thanks for the video of Technics SU. Have a SU-V505 vith problem of the bias reg of R channel only 0 volt bias and bad sound on that channel. Mabye a transistor in the output stage went down. Have you any experense of that? Havent got so fine instrument that you have only a fluke voltmeter. Can you give me a hint if you have any answer should I be greatful. Tord L from Sweden.
That's a beautiful amplifier... I have one in silver... Actually I have the cassette deck, tuner, graphic equaliser and an early model Technics CD player... The graphic equaliser gives the amplifier a substantial boost in volume and if I go passed 3 on the volume control... My neighbors complain lol... I know very well that the graphic equaliser don't make the amplifier output more power but there's something about turning the volume control up to 3 and looking at the volume control and thinking..... There's still a fair bit to go before I get to 10 LoL... I don't know.... It's a mental thing I guess. Not that I will ever go that far, but it's nice knowing that I can if I want to but I don't LoL... Anyway.... Great video on a very nice nice amplifier... Did you end up getting accurate output power figures???? I'm also wondering how much difference there is between the 303 and the 505 on the inside??? Are they similar with higher voltage power supply being the only difference??? Maybe you might consider doing a video comparison and pointing out the differences on the schematics???? Just an idea if you are interested... I'm curious to know...
hi i have a SUV 303 with some speakers connectors ( red and black ) broken: do you know if it is possible replace new ? and where i could find ? thanks for replay
I have the same amp and when i listen to music then the amp turns off and the stand by light starts to flash really fast. Why? And for some time it wont turn on
Got the same problem, have you found a fix? Mine seems to do that when it's playing and there is a shock on the table it stands on. Also had the problem with the left channel not working. That seems to be going better now. In any case I know how to fix that now :)
AllTheGearNoIdea I know Chris. And this is my second wind. I had an amp fetish a few years ago and spend a month in rehab. But I love them. They are beautiful and crave my attention! Oh well least I'm not in denial!
This video was exactly what I needed! I have an SU-V505 displaying an almost identical problem. A quick spray of contact cleaner (well, WD-40) in all the selector switches and a few toggles and it's back to working perfectly. Thanks so much!
I've serviced plenty of these and they're a great amp. I have its big brother, the SU-V707 (90 watts per channel) on my bench at the moment. Discrete output stage, a real beast. The solution to your broken actuator strip is to find a donor amp for parts - you won't find a new replacement part. Take the whole switch / strip / front panel shaft unit out as one assembly and replace it. Don't try to dismantle the strip from the switch, it won't end well. Trust me on this!
Thanks. Yes found a parts from a scrap amp. I also have the SuV7 which too is a nice sounding amp.
I broke the same cable whilst repairing an SU-V4. The cable had seized and the cog was slipping, even taking care I managed to snap the ribbon. Nasty design
Bargain find. Can't believe the size of that Selenium rectifier in the middle 😁
LOL. That's a good one.
Greaaat!!! Love these videos Simon. Don't stop. I'm addicted.
Havent watched the vid yet. Been enjoying the audio gear restorations.
Good stuff Simon 👍 Love that analyser.
Love your way of troubleshooting. Accidents like that broken switch happen. Hopefuly you can find a replacement. :)
Great video! Pity about the switch,.. it happens sometimes.
Perhaps you could do a small modification with a different switch mounted behind the front panel, while running 'jumber' cables from the inactive switch?
Just a thought! Keep up the great work Simon.
11:00 bowden cable :-)
great video, as always. big thumbs up.
Ing. Max Koschuh Ah is that what it is? I know the bowden cables on motorcycle and other mechanical machines but yes your right! Cheers Max.
😀
Never seen one with a heat pipe before.
would have liked to see a better close up of those little lights in the bottom corner, but good video all the same.
Thanks for the video of Technics SU. Have a SU-V505 vith problem of the bias reg of R channel only 0 volt bias and bad sound on that channel. Mabye a transistor in the output stage went down. Have you any experense of that? Havent got so fine instrument that you have only a fluke voltmeter. Can you give me a hint if you have any answer should I be greatful. Tord L from Sweden.
Nice work, maybe with a drip of 2k epoxy resin the speaker selector switch can be repaired? Thanks for sharing.
Master Franco Unfortunately it's the metal track that's fractured. Only viable fix is to replace.
That's a beautiful amplifier... I have one in silver... Actually I have the cassette deck, tuner, graphic equaliser and an early model Technics CD player... The graphic equaliser gives the amplifier a substantial boost in volume and if I go passed 3 on the volume control... My neighbors complain lol... I know very well that the graphic equaliser don't make the amplifier output more power but there's something about turning the volume control up to 3 and looking at the volume control and thinking..... There's still a fair bit to go before I get to 10 LoL... I don't know.... It's a mental thing I guess. Not that I will ever go that far, but it's nice knowing that I can if I want to but I don't LoL...
Anyway.... Great video on a very nice nice amplifier... Did you end up getting accurate output power figures???? I'm also wondering how much difference there is between the 303 and the 505 on the inside??? Are they similar with higher voltage power supply being the only difference??? Maybe you might consider doing a video comparison and pointing out the differences on the schematics????
Just an idea if you are interested... I'm curious to know...
Maybe a bowden cable as used in RC planes is usable.
+pa4tim The problem is at the control end.
They are available but cost more than I paid for the Amp!
Just go to the basic cleaning stuff,computer drive techniques amps can't clean itself .
hi i have a SUV 303 with some speakers connectors ( red and black ) broken: do you know if it is possible replace new ? and where i could find ? thanks for replay
I doubt you will find them. I would replace them with binding posts so you can use good quality wire.
my amplifier Volume control I have a bug in it how do I fix it
I have the same amp and when i listen to music then the amp turns off and the stand by light starts to flash really fast. Why? And for some time it wont turn on
Got the same problem, have you found a fix? Mine seems to do that when it's playing and there is a shock on the table it stands on.
Also had the problem with the left channel not working. That seems to be going better now. In any case I know how to fix that now :)
@@pherdar i haven’t found a fix to it. I gave up and got a new amp
@@sten9596 that's a bummer. I'll scour the web some more for a fix. Mine does start again after it shuts down, so I still have hope
I know went mad with my logic analyser fetish but your amplifier obsession may be getting out of hand!
AllTheGearNoIdea I know Chris. And this is my second wind. I had an amp fetish a few years ago and spend a month in rehab. But I love them. They are beautiful and crave my attention!
Oh well least I'm not in denial!
Simon Spiers Maybe I could dress up as a priest in one of my videos to hear everyone hardware confessions. I forgive you my son.