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Vintage Television and Video Vintage television and video equipment, programmes, VCRs etc. |
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9th May 2022, 11:31 pm | #41 | ||
Octode
Join Date: Jun 2018
Location: Essex, UK.
Posts: 1,306
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Re: Ferguson 3V22/Baird 8929 VCR no picture
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I've been there before! I recently had frame collapse on a set of mine, turned out I'd reinstalled a diode the wrong way round, took me ages to realise! Ah.. I forgot about the screw head, that's the original pinch roller, I couldn't get it off either. I'm not sure if I still have a replacement here. I think I might, if you need me to I can have a look and post it to you. I have a feeling it's sitting inside another (broken) VCR.. It's definitely to this model as it came with the belt kit I fitted. Shame about your 3V16's clock too. It seems to be a more recent problem too, like you say it's probably just age. Hopefully any that get rebuilt last just as long, if not longer, with newer, improved parts. Thanks again '77 (Let me know about the pinch roller if you need it) |
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11th May 2022, 11:45 pm | #42 |
Pentode
Join Date: Jan 2016
Location: Rotherham, South Yorkshire, UK.
Posts: 108
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Re: Ferguson 3V22/Baird 8929 VCR no picture
Good to hear you're getting this going. Could the pinch roller arm have got bent during a previous owners attempts to remove the screw?
I'm working on one of these at the minute. Someone's definitely been in it before me as there's hardened grease on absolutely everything. There's also flux residue on a few of the chips on the audio/servo board. The motors were running continuously. The chips with the flux on them were all ones related to driving the motors so I think whoever it was might have been trying to fix that fault but the cause of it was that one of the unload switches was bent and so wasn't being pressed in properly. IC3, the 4011 chip had flux on but was faulty and looked to be the original anyway. They've also soldered a piece of wire across the 3.15A fuse and lost the oil fence from the capstan and one of the screws that hold the cassette housing to the deck. |
12th May 2022, 9:34 am | #43 | |
Octode
Join Date: Apr 2016
Location: Ventnor, Isle of Wight, & Great Dunmow, Essex, UK.
Posts: 1,377
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Re: Ferguson 3V22/Baird 8929 VCR no picture
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It sounds like your machine has been well 'got at'. It's always a pain when so much work has been done, primarily due to poor fault diagnosis. Who knows how many other faults have been created? Thankfully, '77's machine is in good order and doesn't look to have been messed about with. My next task is to overhaul the deck which involves removing and carefully lubricating various parts and cleaning the tape guides etc, There is also some corrosion on the upper drum which should polish out. Cheers Nick |
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12th May 2022, 6:04 pm | #44 |
Pentode
Join Date: Jan 2016
Location: Rotherham, South Yorkshire, UK.
Posts: 108
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Re: Ferguson 3V22/Baird 8929 VCR no picture
They do bend quite easily. I prefer the cast one in the 3292.
I know. Hopefully they haven't got at the presets. I wouldn't be surprised if the servo ones have been twiddled given the soldering that's gone on but I find at least the drum servo often needs setting up anyway so I don't mind that as much. It needs a lot of hardened grease removing before it will even load a tape properly. They really have gone to town with it. |
13th May 2022, 12:08 am | #45 | ||
Octode
Join Date: Jun 2018
Location: Essex, UK.
Posts: 1,306
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Re: Ferguson 3V22/Baird 8929 VCR no picture
Quote:
I hope it's behaving for you and not causing too much havoc Thanks again, I don't think I can thank you enough for this! '77 |
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13th May 2022, 12:34 am | #46 |
Octode
Join Date: Apr 2016
Location: Ventnor, Isle of Wight, & Great Dunmow, Essex, UK.
Posts: 1,377
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Re: Ferguson 3V22/Baird 8929 VCR no picture
A pleasant evening has been spent servicing the deck mechanics. There was a lot of loose debris, bits of fluff, dust, hair and general detritus in the machine, so I gave it a gentle blow out with the air line, being careful to avoid the video head tips.
With the cassette carriage removed, good access is gained to the upper deck mechanics. The capstan had a slightly rough texture due to tiny corrosion spots. This was removed and polished back to a shine with car body rubbing compound. A small amount of light oil was applied to the phosphor bronze bush before reassembly. Both reel tables were removed and their spindles cleaned and suitably lubricated. The entry & exit guides, slant poles, erase & audio/control (ACE) head were all cleaned with IPA and the mechanism generally inspected for any obvious issues. The main one being the spring on the back tension pole was attached to the wrong place. With the machine laced up, the pole did nothing by way of providing back tension which was one of the causes of the tape riding up the audio control head. With this rectified and the pinch roller refitted with a new screw, it was time to see what we had achieved. Both tape end sensors were covered with tape and the 'cassette in' switch held closed with more tape. This enabled the machine to be used with no cassette carriage. This allows a tape to be held in place while being played and gives good visibility to the tape path past the ACE head/ pinch roller which is where most of the issues will occur. Rewind & fast forward worked smoothly and play produced a remarkably good picture! All the tape wandering had been cured and there was just slight rippling where it passed over the last guide before the pinch roller. Slight adjustment of the ACE head zenith (front to back tilt) cured that. The front panel tracking control range was incorrect and produced a noisy picture on its click stop setting. This is adjusted by sliding the whole ACE head assembly on its slots. The securing screws had been disturbed in the past. Sliding the assembly back to the position that lined up with the original locking paint marks produced a noise free picture over almost the whole range of the tracking control. I'm very pleased with the machine so far and it's looking like it's going to be a good performer. The playback picture and sound are remarkably good and the video heads seem to be pretty good too. So far I've only seen it on a black & white portable TV as it was a mission to dig out a colour one, but that will be next I think. Even the head drum servo seems to be perfectly happy which I have had problems with on other machines - they often seem to be a bit tetchy! Still a bit more work to do, but it's coming along nicely!! Cheers Nick |
30th Oct 2022, 9:30 pm | #47 |
Octode
Join Date: Jun 2018
Location: Essex, UK.
Posts: 1,306
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Re: Ferguson 3V22/Baird 8929 VCR no picture
The saga comes to a very happy end!
Last night, 1100 man very kindly dropped the VCR off after spending some time on fixing it up for me, and now it's running flawlessly, complete with clock! We spent an hour tinkering around, plugging it into various sets, both 405 and 625 lines, using both 405 line and 625 recordings that Nick made for me too all sets ran with no hitch at all, other than my unmodified G8 and pre-recorded tapes, however nicks tape, recorded on my VCR, played flawlessly. After nick left, I sat and watched it pretty much until I went to bed, watching some Dad's Army and Only Fools and Horses, on the tape recorded by nick for me! It's brilliant having it back as I've not been able to watch tapes for months now, or record for years due to my VCR having worn heads, so this will be well loved for sure! Thanks again nick, I really appreciate it! '77 |
31st Oct 2022, 4:12 pm | #48 |
Octode
Join Date: Apr 2016
Location: Ventnor, Isle of Wight, & Great Dunmow, Essex, UK.
Posts: 1,377
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Re: Ferguson 3V22/Baird 8929 VCR no picture
Hi '77,
It was good to meet up with you again the other evening and finally return your video! It has been a rewarding project returning this first generation VHS machine to full working order - especially rebuilding the clock display! I've been using it with a '90's CRT TV and I've been very impressed by the picture quality - the designers really did push the available technology - both electronic & mechanical, to the limit in a remarkably compact machine. It's also a testament to the quality of Japanese components from the '70's. Apart from the failed LED's in the clock display, no other components needed replacing in a machine with a very large passive component count. Quite amazing for 45 year old electronics! In early colour TV's made before VCR's were thought of, flywheel sync - a great innovation in its day for poorly received broadcast signals - can cause havoc with the output from a VCR. If the flywheel sync circuit has a long time constant, a picture with varying degrees of horizontal shaking will result as the line timebase fails to keep up with the varying phase of the line sync pulses coming off the tape. I was therefore interested to see how well an early 520 G8 would cope with the VCR. Rather predictably, it was completely hopeless on a pre- recorded tape but was perfectly fine using a recording made on itself. A self recording drastically reduces the line sync phase errors coming from the tape, especially between each of the two video heads. The flywheel sync circuit in the TV therefore has a much easier time, resulting in a much more stable picture. These VCR's also work very well recording 405 line material. There is no 625 line drop out compensator to get in the way on playback, which causes problems with later machines. The Mk2 Hedghog converter can be used as a stand alone modulator and so we used this to view some 405 line material I had recorded on the 3v22. As the GEC BT302 TV had direct sync (no flywheels there!), it didn't suffer any of the problems of shaking pictures. So all in all, a very satisfactory conclusion to the project: - it's now down to '77 to enjoy using it! Cheers Nick Last edited by 1100 man; 31st Oct 2022 at 4:19 pm. Reason: typo's |
31st Oct 2022, 6:22 pm | #49 |
Octode
Join Date: Jun 2018
Location: Essex, UK.
Posts: 1,306
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Re: Ferguson 3V22/Baird 8929 VCR no picture
Thank you nick, it was great to catch up with you too! I can safely assure you that my duties of enjoying it are being taken very seriously!
It's been good fun playing around with it, I'm quickly getting used to it, with things like waiting for the tape to unlace before being able to press FFW or RW! Luckily your post made me return as I realised, I hadn't attached a picture of it, so here it is playing through the G8! As an aside with the G8, I've realised that it can play home recorded tapes made on other VCRs, although with less stability than recorded and played back on the same, but still very watchable. It's only professionally recorded tapes that it cannot handle! Unfortunately, I didn't get a photo of the 405-line recordings before putting things back to where they came from, but next time I'll be sure to upload a photo of it. The picture quality was brilliant, so much so that I'd never have guessed it was being displayed through VHS! Thanks '77 |