Sony SLC6 Mark 1 Betamax - Part 1 - Servo issue

[@crashbandicoot4everr]

13:15 that would be the βII/βIII record-βI playback switch for the American version, the SL-5000. The PAL and NTSC models share the same board just with different components. That's why lots of components are missing in a lot of areas.

[@MrBetaByte]

That makes a lot of sense and I did wonder - thank you so much for sharing. 😊

[@betamaxrebeloutpost8945]

its often those light blue sanyo caps drying up. Later models with the light blue caps dont seem as bad though.

[@TTVEaGMXde]

Sanyo bought an electrolytic capacitor factory that probably produced inferior electrolytic capacitors. After improving the quality, however, the appearance should have changed as well.

[@MrBetaByte]

That's a really great insight on the Sanyo capacitors. They do seem more reliable in newer machines.

[@MrBetaByte]

It's such a common issue that changing all the light blue Sanyo capacitors is a first step and then diagnose issues if there are still any to solve.

[@lukasgayer5393]

Aaaah, the servo issues. Well, many more caps will need to go :) Oh, how I "enjoyed" working on my C5s but also some earlier Betacords. I wonder why is it always the caps around the servo ICs. Are they subjected to more stress over the years?

[@TTVEaGMXde]

Sanyo bought an electrolytic capacitor factory that probably produced inferior electrolytic capacitors. After improving the quality, however, the appearance should have changed as well. The smaller the diameter of the electrolytic capacitors, the shorter the durability.

[@MrBetaByte]

Yes, certainly the go to repair on these machines. Voltage, heat and frequency stress certainly shorten the life but these machines are old and the manufacturing process for all these capacitors was not always 100% but it's amazing how well these machines have lasted. The Sanyo caps were just not that well manufactured in this generation of machine. Did you work for a TV and Video repair business? Would love to hear your story on working on these machines.

[@analogvideochannel4612]

@@TTVEaGMXde If it's like in the C5 those light blue ones that go bad are some special type of capacitor that seem to be meant to behave more like tantalums rather than standard aluminium electrolytics. Not sure if they are some weird form of electrolytics, tantalum or some hybrid or some predecessor to OSCONs or something else but I guess whatever formula they used didn't hold up very well long term. In the role they have at least in the C5 I don't think a standard electrolytic from the time would have had good enough properties to do the job they're meant to do.

[@patarrota1986]

hola tengo yo este modelo y no coge la cinta automaticamente tampoco se me ve la imagen me puedes decir porque es saludos espero tu respuesta

[@MrBetaByte]

There are many things that can cause this. What have you checked so far?

[@patarrota1986]

Me lo puedes traducir a español por favor

[@patarrota1986]

@@MrBetaByte le ocurre los mismo que al tuyo

[@MrBetaByte]

Have you changed the servo capacitors? ¿Has cambiado los condensadores del servo?

[@patarrota1986]

No, los va a comprobar mi padre

[@paulb4uk]

I have one of these from my mum and dads i saved from the tip it does the functions and loading fine but no sound and only a dark grey picture no jumping or lines i also have the heads from a mk2 machine that has suffered damp and is in my dads basement not in the best condition the mk2 a shame as it had the original box as well .i do have an sl c7 this has good heads and picture just servo cap issues and the clock is not working no doubt due to the leaky battery for clock memory .

[@MrBetaByte]

Sounds like the sound is being muted from lack of video signal so my guess is it'll be an issue somewhere on the video processing side of things. Shame the mk2 has been in the damp especially as it has the original box but it may well still be worth saving - I've seen machine sthat have been in the damp come back really well but it just depends. The battery on the C7 is a real pain these days - they are always bad and have leaked everywhere. Buttons for setting the time functions are always problematic too. Are you going to try and get the issues sorted?

[@paulb4uk]

I will sort the c7 out the buttons for settings all need replacing. The C6 I may pass it on to anyone who wants to save it or use it for parts .

[@TTVEaGMXde]

I wonder why SONY didn't install a complete (1/2" high) head drum, or did a patent fee have to be paid to JVC per groove ? At this point I would like to mention (once again) that electrolytic capacitors of an old design, even with only 5.2 MHz suffer. The newest IC in the video is from the 52nd week 1981. I know Ladykillers in 2 bad versions: color unrestored (4:3) and color bad (too much red) restored (HD).

[@MrBetaByte]

Sorry, yes, I will cover the capacitors that are breaking down under frequency - I have two machines where I think this is the case and I'll talk about that then and I'll try my best to mention you too as it's a very valid point 😊 Ladykillers is a great film with maybe not so great colourisation but I can get past that just because it's such a great film. From what I understand, the thicker head disk is to help with image stability with the disk's alignment, this being no longer and issue when the head disk 'fit' was calibrated. I think it's just Sony being 'belt and braces' with making sure their machines were as stable as possible.

[@jkmac625]

What type of capacitors did you use instead of electrolytics? Tantalum? What's the advantage of using a different type? Are those replacements also polarised? Thanks.

[@MrBetaByte]

Yes, I used tantalum capacitors just because they are much more resilient and should outlast the life of the machine. Yes, they are polarised and I do use 35v ones too as the voltage rating is less of an issue (as long as they are the same or higher than the originals of course) when it comes to life expectancy.

[@livinlifetothefullest2750]

you might want to do an update video to reflect a further update to the SL-C6 BEFORE the MK2 design, because i've got the (AS) Australian model + the complete manual. Dated January 1984 is a "Supplement 2'" where the board CP-6 (Camera PLAY board) was eliminated and integrated in the board SS-9 which was altered to reflect this. i haven't matched the changes in the manual but visually there's less usage of the blue Sanyo's, C18 suggested a Tantalum but they used a Pink Elna Electrolytic & C58 was an Elec now used a green color 'ceramic' in its place.

[@MrBetaByte]

That's super useful to know - thank you so much. Would there be any chance of getting an electronic copy of the second supplement? If I can, I will certainly return to this with my own C6 Mark 1. Thanks again.

[@livinlifetothefullest2750]

@MrBetaByte I'll have to scan it. Mine covers the E and AS dated May 82, the online I've seen E model Jan 82 only go to the end of the parts list. Mine has the adjustment 53 pages and and the operation manuals 90p the op long. What would your email and I'll try scanning them?

[@MrBetaByte]

@@livinlifetothefullest2750 That would be amazing - thank you. My email address is [e-mail] and I'll be sure to give you a mention in a future video too if you do manage to get it scanned - I know they can be a bit of a pain depending on how the pages are formatted.

[@metingokbulut837]

Cihaz çok güzel 🇹🇷🇹🇷🇹🇷🇹🇷💯💯💯💯👍👍👍👍

[@MrBetaByte]

Thank you

[@metingokbulut837]

🇺🇸⭐️🇹🇷💯👍

[@MrBetaByte]

Thank you. 😊

[@AureliusR]

Top tip: if you're going to do lots of tech videos up close with your hands, cut your fingernails! I guarantee your channel will grow and do better with that one simple change.

[@MrBetaByte]

lol - I have had comments on this and have explained why I have long nails and how I use them too but thanks for the tip - much appreciated.

[@AureliusR]

@@MrBetaByte I know they can be useful, but so many people associate long fingernails with bad personal hygiene, and no matter how much I fight that connection, it was just ingrained into me at an early age by parents and teachers.

[@MrBetaByte]

@@AureliusR That's so true - I wonder if part of me having long nails is in rebellion to that? Not sure but I do clean under them very thoroughly as I also use them as a tool to remove iPad digitisers (together with guitar plectrums and playing cards) but I do so hear what you're saying.

[@livinlifetothefullest2750]

1 other kid in my school class when i studied electrionics kept a longer nail so he could adjust the various non conductive adjustable resistors . Plus longer nails habe their uses to open say walkmans sometimes better than using a knife.