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Rich
Thursday 9th November 2017
4:49 pm U.K.

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Hi everyone.

Does anybody know where I can buy either a new or good used video head disk for a Sony SL-HF100UB please?

Many thanks in advance.

Rich.

K lambert
Thursday 9th November 2017
10:02 pm U.K.

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Rich:

New: maybe in Australia but that may be expensive.

Noel can tell you more.

Used: in a faulty non working machine but that may prove harder to source.

I have come across a couple where they had horrendous faults but the head disc was fine. That was some time ago though.

......Kevin

Rich
Friday 10th November 2017
9:06 am U.K.

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Kevin.

Thanks for the reply. It's annoying as the video heads on this particular slhf100 seem fine, just the hifi is playing up. It plays pre recorded hifi tapes fine but on its own recordings the tracking knob has to be turned a bit to the right for the hifi to come on. Sometimes it records in hifi but won't play back the hifi sound at all. After speaking to Gabriel about this the conclusion is that the hifi heads are shot.

Regards

Rich.

nageeb
Friday 10th November 2017
9:12 pm U.K.

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Hi I'm looking for any information on obtaining service manuals or schematics (or both, preferably) for a Sanyo Multi-System Beta unit. Model VTC-R4ME. It's from 1983/1984 and in many ways resembles the VTC-5150 in styling and functionality, and supported multiple systems (NTSC 3.58 & 4.43, Pal and Secam). From my research, it appears that this model sold mainly in the Middle East & Asian markets.

I've been trying to fix-up this old beauty for a while now and am rapidly approaching the limit on what I can figure out without reference materials. Any advice would be appreciated.

thanks

nageeb

Stephen
Sunday 12th November 2017
9:14 pm U.K.

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Hi.

I have a problem with an Sony SL-F30. The head drum doesn't rotate, but the capstan runs at maximum speed. The head drum hall sensor isn't an issue as I replaced the drum from a working machine. I've seen the same problem before, so was wondering if anyone else has seen this?

Regards

K lambert
Monday 13th November 2017
10:45 am U.K.

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Stephen.

I know this is not much help but I de vaguely remember having a similar issue on that model.

I had a spares F30 so swapped out the servo (SS) board.It cured said issue.

I would suspect the main drive IC that controls both head drum and capstan motor. Also check for leaky transistors around this area, faulty resistors and high esr caps. Also check for cracks around said board too.

......Kevin

IMPORTANT:........One other word on the F30. ..........

When a tape is inside and you turn it ON make sure you hear TWO clicks.

One is the pinch roller/back tension solenoid moving the other, most importantly, is the reel brake solenoid de activating. The reason I state this is I've now seen two where the reel brake solenoid has a failed resistor and this brake does snot release. Sadly someone had used FF and REW or tried to play it like that and there is now a band of noise down to wearing of the heads down to the high back tension.

As far as I'm aware other models do not seem to get that issue.

......Kevin

Stephen
Monday 13th November 2017
7:51 pm U.K.

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Thanks for the response and advice Kevin. I'll be on the look-out for a scrap F30 then!!

Regards,

Stephen

Bjorn
Thursday 16th November 2017
6:57 pm U.K.

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Hi All, sorry it's been a little while. My Sl-C6 is having issues, although dealt with lots of common servo problems on these, this one presents an unusual problem, hopefully a repair mistake on my part.

I've rectified the normal servo/poor capstan lock problem (replaced all the little caps) C62 on SS-9 had to be changed as well, now the issue is no playback at all. Mechanism works, but wont switch to playback, upon further inspection, I noticed the drum speed behaving very odd, basically mimicking the reel motor speed, and oddly changing direction for rewind. I'm guessing a short-circuit somewhere. C62 (16v 470uF) lasts about 5 minutes before bulging and popping.

Any ideas? Like I said, I'm hoping its a simple repair error.

Rich
Tuesday 21st November 2017
3:00 pm U.K.

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Bjorn;

I have servo problems with my slc6 too. I've replaced nearly all the electrolytic capacitors on the PCB and still shaking and wobbly picture. Damn thing 😣😣

I think the previous owner twiddled too much with the VR's on that PCB.

😥

Rich.

Bjorn
Tuesday 21st November 2017
5:50 pm U.K.

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HI Rich , C6 servo problems are my biggest headache on these machines. Pay attention to the 0.22MF ELECT(solid) 16v C7, C8. those tiny blue sanyo ones. The shaky picture could also be a sign of CTL head wear, and other host of problems. In all cases we replace all the rubber belts, and have to give the head assembly a good clean. User tampering is another issue, on one machine all the VRs have been messed about with, so causing a real issue often needing the oscilloscope to sort out (another piece of gear that has packed in here).

This machine we've found part of the issue, now the drum rotates very slow, so must be a short around the drum-free VR. Most likely an incorrect capacitor, so backtracking the repair to find the issue although a loud bang gave me some idea. Looks like this one could be heading for use as a rewind/cleaning machine.

We also have a MK2 in where the loading assembly has been taken apart and sort of put back together again, no doubt an attempt to replace a couple of belts, and we have another MK1 with a bad power supply board. So if you need a replacement servo chip to try, I may be able to remove one for you.

Bjorn
Tuesday 21st November 2017
5:55 pm U.K.

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Rich, I just read your post for a spare head disc for HF100, I believe the C9 has a similar disc. Do you still need one? I have 2 drum assemblies somewhere here, one from a C9 and one from a HF100, oh and a C5 which is of no use to you, but someone one else might read and want one. Give me a couple of days to locate it, and I'll run the head checker over to see if any good. It was on my to-do list for a while, but never got round to checking them.

Rich
Tuesday 21st November 2017
7:45 pm U.K.

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Hi Bjorn.

Thanks for the replies. I've tried all sorts with this c6 but to no avail. I don't have an oscilloscope to check it out on though unfortunately. I think that it's going to be consigned to a rewind machine.

Regarding the hf100 head disk....I'm very interested please. I also have a c9 with eject mechanism timing problems which I need to put right (the cogs slipped whilst I was fitting the cassette inside flap due to it breaking on one side 😭😭😭) I'm going to look online for a service manual for it to see if it shows all the timing marks etc for the mechanism.

Out of interest, if the hf100 head disk is ok, how much will it cost please?

Regards

Rich.

Bjorn
Wednesday 22nd November 2017
7:32 am U.K.

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Hi Rich http://www.telespares.com.au/index.php?main_page=product_info&products_id=321950

Just after my message I quickly checked Telespares to see if they had one, and looks like they do, I think it was $20 Shippping is usually around $10. To do a parts search exclude the "SL-" in the search box, just HF100.

I may have a C6 coming in surprisingly with a different problem to the servo, I was told that parts works fine, so still in shock about that :) I intend to get the readings from that one for reference, plus a detailed scan of PCBs and parts to update my schematics. The Sony ones are good, but I prefer to have good photos added for easier reference.

I'll get back to you with a price on the head disc shortly.

Sony C9 front load mechanism, I do have all the schematics, both printed and PDF, including adjustment manuals and supplementary ones. Interested?

Rich
Wednesday 22nd November 2017
9:46 am U.K.

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Hi Bjorn.

I just looked on that website and it's the upper head drum that they have for sale, not the head disk.

Thanks though.

Yes I'd be interested in the c9 eject mechanism information please.

Email me if you like, to save clogging up the chat page with our ramblings. Haha

Many thanks.

Rich.

Bjorn
Wednesday 22nd November 2017
10:52 am U.K.

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No probs Rich, but it does make us look good on the top posters list. ha ha ha

Best place I found manuals were www.manuals-in-pdf.com but they're sometimes expensive, or www.ioffer.com seller named Mauitron (of spelt similar) they seem to have most Beta manuals, and delivers them very quickly.

Rich
Wednesday 22nd November 2017
1:26 pm U.K.

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Haha. That's true!

When you get the C6 in could you email me photos of the VR's on the servo PCB please? I just wanna see how off mine is.

Thanks Bjorn!

I'll look forward to hearing from you soon about the hf100 head

Rich.

Mehmet Yurdakul
Thursday 23rd November 2017
11:04 am U.K.

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Hello people,

Me and my study group from university are doing a group project about obsolete technologies and we chose Betamax because some of us were familiar with it and interacted with it in our childhood. I didn't actually own/saw/interacted with the Sony Betamax player so this is why I am creating this thread/chat to ask anyone here to tell me more about the technologies used by Betamax, it's components and how they work. Thank you in advance and have a nice day y'all.

Bjorn
Thursday 23rd November 2017
5:44 pm U.K.

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Hi Mehmet Yurdakul

You've come to the right place, but I can't really say any better than what's already on palsite as it gives you most of what you need to know.

My first contact with the format was from my late Grandfather who had a Sony C5. He was the only one in the family at the time who could afford to own a video. Yes, you read that right, afford to own a VCR. Different time back then, lots of families were only just starting to own a TV, poorer friends only had a black/white set. To watch a video we would visit someone who had a VCR until we could eventually rent one, which would more than likely be a VHS.

I chose Beta mainly because I found the picture to be better and more stable than VHS. The machines were so much better, in fact many of us have early Beta machines which still give perfect picture, whilst a lot of newer VHS machines, and DVD players only last a year or so.

These days I still use Beta, not so much for films as they need more looking after, but to replace features no longer available on modern equipment. For example, lots of set top boxes no longer broadcast RF out, they may loop through, but that's all, and if you're luck may have a scart on the back, so I use a Beta to relay the signal to other equipment. Great with Youview which only allows subscription channels to 1 set top box. It will also tape from on-demand channels, and anything connected to it, which a lot of modern recorders don't like doing. And when was the last time you saw a DVD player or set top box with a clock? A simple feature which we used to take for granted, the VCR clock display, oh yes and buttons that light up to show you what channel you're actually watching. No need for on-screen displays, it's all on the video!

Bjorn
Thursday 23rd November 2017
5:51 pm U.K.

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No Probs Rich.

I've just had 2 jobs come in to get done quickly (ha! quickly with Betamax?) some people have no idea how long it takes just to get parts. lol Seriously, I have to get these assessed, but should be able to get back to you over the weekend about the head disc. I'm stripping and testing a number of heads on Saturday, so it will be top of my list. Currently working on 6 Betas.

Rich
Thursday 23rd November 2017
6:00 pm U.K.

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Thanks Bjorn!!

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