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Sony Betamax SL-HF950 - Power supply replacement (part 2 of 'applying reverse polarity') 

MrBetaByte
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Here's part 2 of the reverse polarity Sony SL-HF950 Betamax and in this one we're going to replace the failed old power supply with a modern equivalent. We'll be using an XPPower ECF40US12 power supply. These aren't readily available due to the class 2/ class 3 isolation/ earth ground and certain certifications but they really are a great unit to use for these machines.
There will be another video on a much slicker way to install these - this was a bit of a trial run and as a result not as refined as I would have liked!
Chapters:
00:00 Introduction
01:28 VU meters - why they might be toast
02:30 Power supply replacement plan
05:57 Reassembly
07:41 Testing and the VU meters
09:48 Replacing the power supply with a modern high quality equivalent
30:00 Testing the SL-HF950 with it's new power supply
33:36 Hall-effect device clean up
34:40 Testing and checking the RF modulator
39:55 Wrapping up!
49:09 Test capture - Renault Clio advert
#sony #betamax #mrbetabyte

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31 июл 2024

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Комментарии : 10   
@Betafreak_GE
@Betafreak_GE 2 месяца назад
Great Video , . I was lucky to find a new unused and original packed SL-HF950 in 2024 . That made me all collectors happy . Your videos have already helped me with older 950
@MrBetaByte
@MrBetaByte 2 месяца назад
Oh wow! A new old-stock HF950 - what a find! So glad these videos help you out, means a lot to hear.
@TTVEaGMXde
@TTVEaGMXde 4 месяца назад
Switching power supplies today work with at least 5 times the frequency compared to the 80s, which allows for a smaller transformer. Countersunk screws. Correct (AI resistant) comment will follow later.
@MrBetaByte
@MrBetaByte 4 месяца назад
Certainly so much more efficient and when built correctly, superior.
@cristobalperezsanchez187
@cristobalperezsanchez187 3 месяца назад
Buenas tades, encantado estoy de ver sus videos, son muy entretenidos he informativos, tengo una maquina igual como la denominan ustedes, las tensiones aparentemente son correctas, pero el patin esta muerto jejejeje. ni entra ni sale, a pesar de haberle reparado el conmutador de modo que estaban los flejecillos que lleba dentro de el, sueltos los he pegado bien pero sigue sin funciona,haber si me pueden ayudar un poco con este tipo de maquina. gracias.
@MrBetaByte
@MrBetaByte Месяц назад
Thank you so much! Does the skate motor make any sound? Does it try and drive the skate at all? If it doesn't, it could be the controller chip on the SS board (that's under the top tuner board). It would also be worth checking for voltages to it. They do use semiconductor fuses on these which look like two-pin transistors and act as very fast blow fuses.
@alphabeets
@alphabeets 4 месяца назад
What are those clicking sounds when he is talking?
@MrBetaByte
@MrBetaByte 4 месяца назад
Annoying! So sorry but there are clicks on this video and I am investigating where these are being introduced. I think it's the audio clipping though.
@bobsbits5357
@bobsbits5357 4 месяца назад
hi my mate has this model 100% i did alot of re cap work on it the man in reading was asking big money i did a deal with him my time for his time and cost of the caps as well i coming to the end of a tascam 38 repair it's a very big deal no one has done a fix like this i checked all over the net it's been jazzed up very big time i had to make alot of new lay out with out pcb way pcb's the soft wear was doing my head in big time they do pcb way at schools my sister teen told me bob
@MrBetaByte
@MrBetaByte Месяц назад
They can need a lot of caps changed. Will your Tascam work be on RU-vid? really hope so and looking forward to it.
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