Congratulations! I'm happy you followed my advice on the other video and you succeeded. This fault is very common and you will face it again in the future. What happens with that magnet is that it slips during acceleration stages, as simple as that. Superglue is absolutely fine for that repair, I've repair dozens in the field with no problems in the long run. Keep doing such a good job and greetings from Spain!
thanks to both of you, had same issue on nv-hv60 (same mechanism), i thought y/c processor was shot. would of never guessed it's magnet coming loose. good men! (mentioned auto-calibration procedure also works on nv-hv60)
Thank you I Colin fear that the new age of electronics will be built without the ability for us to repair it. I have devoted many years repairing and upgrading my collection of 40 year old Commodore Computers. The C64 and Amiga machines. Little did Jay Miner and his dog, Mitchy know that 40 years on his creation would still be around and loved. There were many people who helped to create the Amiga, but the dream itself was the creation of one man, known as the father of the Amiga, Jay Miner.
Bel lavoro,ho apprezzato l'assistenza che hai fatto ai due panasonic,mi piace in particolare l'NV-HS950,gran modello.tra i miei ho in collezione l'NV-HS900,modello che amo molto!
Hi Colin. Haven’t made a comment before but keep up the good work. I worked in the video repair business years ago and have a collection of old formats and find your channel very useful 👍
Great video, I have a stack of broken SVHS decks, its close to impossible to find VCR techs in Australia most are now dead or in nursing homes or cant be bothered anymore or moved on to mobile phone repairs.
If the ferrite ring of the NV-HS930 almost runs without glue, I would have only used 1 drop of my special glue (Pattex Repair Gel) to absorb the rotational forces. In contrast to its predecessor NV-HS960 (Amorphous Heads), the NV-HS930 (Superferrite Heads) has HiFi sound even when the FM carrier amplitudes are below the norm. Second 960 KO criterion: the TBC does not work correctly if the image content begins directly after the burst level. The 930 has no way to get full Y resolution without dropping VNR. Either the sharpness adjuster (no + if VNR is off) or the VNR is the limit. My NV-HS950 had a TBC that tended to shift lines to the right up to the TBC limit when the tape quality was poor. I usually have a servo motor in reserve for the K-Drive because removing the old oil from the motor pulley with denatured alcohol and sticking it on with repair gel takes too long. Only a burst motor pulley can no longer burst, which is why I glue it with an adhesive that doesn't stick (attacks) to plastic, but only forms a "driver" on the chrome axle for the gap in the pulley, as the rest of the glue passes through the tight pulley is pushed away. Leave 1mm of space above the end of the motor axle. If a K-Drive recorder has just broken down, you can try turning the device upside down and pressing eject to remove a cassette. Had it tested successfully in Denmark so that the cassette didn't have to be sent to Hamburg. The oil needs time to creep under the pulley. Sorry, I couldn't completely correct Google Translate.🙄
Well done Colin, the machine with the loose magnet was the first time i've ever seen that odd failure. I bet we will never see that again. Most of the vcr's i repaired had the flap that you had to lift it before putting the facia. The plastic end pins that were part of the flap i had to drill tiny holes in the remains of the pins to join it back on to the flap end. Needles were glued in to support the flap. A bit bodgy but i didnt have a new flap to fit. Sorry colin, long waffle :-(
I've studied the K mechanism extensively and found out that the motor coupling breaks mainly due to high spring tension on the pinch roller. It puts too much stress on the coupling when the tape enters the play/picture search mode. I slightly stretched the spring to make it longer. Now it has approximately the same pressing force as the spring in my old Sony deck. Never had any more problems with the coupling since. I own 6 K-mech decks and I've made the adjustment on all of them. It is also a great idea to lubricate everything. I use lithium soap type lubricant. They say it does not damage plastic and so far so good.
The Teac/Symphonic idler clutch had a similar issue where the spring steel in the clutch becomes stiffer with age. Cutting the spring in half and stretching to the normal size fixes most of the clutches and felt is not worn. When I worked on the bench we used molytone grease for tape mechanisms.
@@chad2787True. However I do not know where to get this grease. The ones originally used are not being made anymore. The lithium soap is as close as I could get it.
Have you ever worked on any of their camcorders? I have yet to see a better built consumer camcorder than what Panasonic made. They all have a heavy cast deck and all of the boards are made to swing out for service- something that is almost exclusively found in the industrial/broadcast domain.
Hi. I have a panasonic S-VHS video model AG-5700 and the problem is that tapes recorded in S-VHS mode the image as black scratches like when you put a tape recorded in S-VHS mode in a vhs video. Tapes recorded in vhs mode the image is fine. Any idea what the problem could be? Thank you.
@@video99couk I have a tape recorded in S-VHS mode that used to work fine in that video. But now the image as the black scratches. It must be another problem.
Hello there, I hope you can help. I have a mitsubishi HV-V6000 NTSC S-VHS VCR. IT plays tapes no issue but the HI-FI sound gone. If I send it to you to fix. How much would it cost? How much is the postal cost to send it back from your place to Ireland?
I don't take on repairs, I have a backlog of my own equipment to work on. It's worth trying to clean the heads in case it's just a case of the hifi audio heads being clogged.
I had a Panasonic S-VHS machine with the drawbridge facia, I thought the VHS picture was much better from the older VHS only Panasonic.I thought the picture was noisy, compared to the previous machine, for no additional detail.
if these s-vhs models are anything simillar to my nv-hv60 (which has same mechanism as first deck in thsi video), then you're right, pretty bad picture.....
I just fixed a NV-FJ730 having the loose magnet issue, but it continues to show 2 00 21, whereas I understand 21 is "PG automatic adjustment error" Has anybody an idea? Playback of VHS/S-VHS looks normal booth in SP and LP. In another manual I found 21 stands for "the vertical synch signal is lacked while over five seconds on the alignment tape"
hello!, please help me with my camera, the screen is white and when zoomed in the lens won't move [my suspicion is the dynamo is moving] is there a way to fix my camera?, the camera I have is a Sony DCR TRV 480e, yes you I know that what I have is an old camera. please help me thanks!
@@Matt_Quinn-Personal_Account oh..., I disassembled the back panel of my hadycam screen and I didn't find any oddities that I saw but I didn't really dare to dismantle the lens, you also know that if you disassemble an old camera, maybe some of the components won't function completely, and thank you for your input. !
@@Matt_Quinn-Personal_Account no, I didn't disassemble it carelessly - instead I watched several tutorials on UA-cam, yes I also read several tutorials in old camera books, if anyone offended me with my words, I apologize once again!
i had a 1990s japanese imported model svhs with tbc but it died beyond repair as the basket had bent and put stress on the motors over time. It could not be repaired.
Sometimes a machine which is great for one tape isn't the best for another, so you can't always say one machine is better than another. Good workhorses include Panasonic NV-HS930, AG-4700/NV-HS1000, JVC HR-S7600 and several similar JVC/Philips models which include a TBC. Personally not so impressed with Panasonic AG-7650 or JVC professional grade decks which seem to suffer from head wear and capacitor problems. I don't like the pictures from Panasonic NV-HS950 even though it should be very similar to NV-HS1000. I think it's helpful to have a fleet of different models from Panasonic and JVC in case a poor tape plays better in one than another.
Just shows you that you do not have a clue. So now let’s get superglue out. Why don’t you build the whole deck with superglue? Don’t even have a tool for that little grub screw lol and not even alignment tape. Oh and no tool is an overkill they was made for a reason but you think a screwdriver and superglue is all you need lol. You shouldn’t put superglue on it because you can cause more force. Would you superglue engine fins on to see if it will hold. Think you need to learn forces in spinning at high speeds,etc. not going to go into it because you wouldn’t understand anyway. Buy yourself some decent decks and transfer and do a channel on that because you don’t have a clue or the tools for repairing.
One point which certainly made me LOL was using an alignment tape. They were last manufactured about 20+ years ago and were usually pounded to death by service departments. It's not like you can just order a new one of those from Panasonic, here in 2024.
@@video99couk well I still have some but still to the point superglue. I still have my repair service kits with all the tools because of being a service engineer and we used the right tools and not superglue. And like I said learn how forces work and gravity the thing that keep you on this planet. You can back yourself up as much as you like but your what’s called a piss poor job and nothing who knows about these things would work the way you do. Don’t ever try to fix laserdisc players or optical recorders, because you would how to learn how to use your tools and not a lucky screwdriver and superglue.
@@Matt_Quinn-Personal_Account don’t make you laugh. You’re a joke in repairs. I attack because I spend most of my time repairing these mess ups that people like you have done. Laptops are the top thing for repair videos on here showing people how to mess them up more, phones are a big thing too. I don’t care what you know or are but you know nothing about repairs and have very basic knowledge on this. Also I don’t want to start a channel, because I don’t want people trying this that could lead them to harm. We are playing with electricity after all, also I don’t have the time to teach people. Because to teach them takes years of studying and not a short video.
@@barrieshepherd7694 I don’t, for some reason these videos keep popping up on my watch list with other stuff I don’t watch. Maybe it’s to do with other channels linking them. Also it’s because I don’t want people trying this thinking they might be able to fix theirs and mess it right up or worse electrocute themselves. All vcr repairs need special equipment to put them right, even tension you use a special meter to put it right. Speed it’s playing,etc it all done with equipment and not superglue. But what do I know only fixed this stuff for most of my life. Anyway if you want a good vcr you still can get new old stock. Also you can still get parts, you just got to know where to go.
Great to see these repairs completed on these somewhat fiddly machines.
Congratulations! I'm happy you followed my advice on the other video and you succeeded.
This fault is very common and you will face it again in the future.
What happens with that magnet is that it slips during acceleration stages, as simple as that.
Superglue is absolutely fine for that repair, I've repair dozens in the field with no problems in the long run.
Keep doing such a good job and greetings from Spain!
thanks to both of you, had same issue on nv-hv60 (same mechanism), i thought y/c processor was shot.
would of never guessed it's magnet coming loose.
good men!
(mentioned auto-calibration procedure also works on nv-hv60)
Thank you I Colin fear that the new age of electronics will be built without the ability for us to repair it. I have devoted many years repairing and upgrading my collection of 40 year old
Commodore Computers. The C64 and Amiga machines. Little did Jay Miner and his dog, Mitchy know that 40 years on his creation would still be around and loved.
There were many people who helped to create the Amiga, but the dream itself was the creation of one man, known as the father of the Amiga, Jay Miner.
I'm the proud owner of a VIC-20 myself. A remarkably reliable computer.
Bel lavoro,ho apprezzato l'assistenza che hai fatto ai due panasonic,mi piace in particolare l'NV-HS950,gran modello.tra i miei ho in collezione l'NV-HS900,modello che amo molto!
Hi Colin. Haven’t made a comment before but keep up the good work. I worked in the video repair business years ago and have a collection of old formats and find your channel very useful 👍
I have the NV-HS950. It´s a really great Machine.The only problem was it had a cracked Gear which i replaced. It works great now since over 3 years.
I have the same problem on my Panasonic, so thank you for the solution with the magnet and superglue :), now it works again 👌
I did'nt know about that magnet in the video drum. 👍
I've not tried them but van eck video services in the netherlands has started selling newly made replacement k mech motor couplings now.
This was really helpful thank you.
Great video, I have a stack of broken SVHS decks, its close to impossible to find VCR techs in Australia most are now dead or in nursing homes or cant be bothered anymore or moved on to mobile phone repairs.
If the ferrite ring of the NV-HS930 almost runs without glue, I would have only used 1 drop of my special glue (Pattex Repair Gel) to absorb the rotational forces. In contrast to its predecessor NV-HS960 (Amorphous Heads), the NV-HS930 (Superferrite Heads) has HiFi sound even when the FM carrier amplitudes are below the norm. Second 960 KO criterion: the TBC does not work correctly if the image content begins directly after the burst level. The 930 has no way to get full Y resolution without dropping VNR. Either the sharpness adjuster (no + if VNR is off) or the VNR is the limit. My NV-HS950 had a TBC that tended to shift lines to the right up to the TBC limit when the tape quality was poor. I usually have a servo motor in reserve for the K-Drive because removing the old oil from the motor pulley with denatured alcohol and sticking it on with repair gel takes too long. Only a burst motor pulley can no longer burst, which is why I glue it with an adhesive that doesn't stick (attacks) to plastic, but only forms a "driver" on the chrome axle for the gap in the pulley, as the rest of the glue passes through the tight pulley is pushed away. Leave 1mm of space above the end of the motor axle. If a K-Drive recorder has just broken down, you can try turning the device upside down and pressing eject to remove a cassette. Had it tested successfully in Denmark so that the cassette didn't have to be sent to Hamburg. The oil needs time to creep under the pulley. Sorry, I couldn't completely correct Google Translate.🙄
Well done Colin, the machine with the loose magnet was the first time i've ever seen that odd failure.
I bet we will never see that again.
Most of the vcr's i repaired had the flap that you had to lift it before putting the facia.
The plastic end pins that were part of the flap i had to drill tiny holes in the remains of the pins to join it back on to the flap end. Needles were glued in to support the flap.
A bit bodgy but i didnt have a new flap to fit.
Sorry colin, long waffle :-(
It's very, very common on these decks.
Last week I serviced two units with this same fault.
I've studied the K mechanism extensively and found out that the motor coupling breaks mainly due to high spring tension on the pinch roller. It puts too much stress on the coupling when the tape enters the play/picture search mode. I slightly stretched the spring to make it longer. Now it has approximately the same pressing force as the spring in my old Sony deck. Never had any more problems with the coupling since. I own 6 K-mech decks and I've made the adjustment on all of them. It is also a great idea to lubricate everything. I use lithium soap type lubricant. They say it does not damage plastic and so far so good.
The Teac/Symphonic idler clutch had a similar issue where the spring steel in the clutch becomes stiffer with age. Cutting the spring in half and stretching to the normal size fixes most of the clutches and felt is not worn. When I worked on the bench we used molytone grease for tape mechanisms.
@@chad2787True. However I do not know where to get this grease. The ones originally used are not being made anymore. The lithium soap is as close as I could get it.
Always been a fan of Panasonic's Super Drive units. Most of these sport quite a great picture, albeit some of them tend to dull colors a bit.
NRK 2 :) Long time ago! Stil onair tough
I had the opportunity to get a 950 for really cheap a few years ago but wasn't quick enough, still salty as it's such a good vcr!
Have you ever worked on any of their camcorders? I have yet to see a better built consumer camcorder than what Panasonic made. They all have a heavy cast deck and all of the boards are made to swing out for service- something that is almost exclusively found in the industrial/broadcast domain.
No, but I do have a 3-CCD Panasonic camcorder which needs attention so I may do so at some point.
Hi. I have a panasonic S-VHS video model AG-5700 and the problem is that tapes recorded in S-VHS mode the image as black scratches like when you put a tape recorded in S-VHS mode in a vhs video. Tapes recorded in vhs mode the image is fine. Any idea what the problem could be? Thank you.
They could be SVHS recordings on a VHS tape, called SVHS-ET. Not all SVHS machines can play those recordings.
@@video99couk I have a tape recorded in S-VHS mode that used to work fine in that video. But now the image as the black scratches. It must be another problem.
Hello there, I hope you can help. I have a mitsubishi HV-V6000 NTSC S-VHS VCR. IT plays tapes no issue but the HI-FI sound gone. If I send it to you to fix. How much would it cost? How much is the postal cost to send it back from your place to Ireland?
I don't take on repairs, I have a backlog of my own equipment to work on. It's worth trying to clean the heads in case it's just a case of the hifi audio heads being clogged.
@@video99couk Thanks for quick reply. yes, I did clean the heads with dry paper. It is still the same. Anyway thanks.
I had a Panasonic S-VHS machine with the drawbridge facia, I thought the VHS picture was much better from the older VHS only Panasonic.I thought the picture was noisy, compared to the previous machine, for no additional detail.
if these s-vhs models are anything simillar to my nv-hv60 (which has same mechanism as first deck in thsi video), then you're right, pretty bad picture.....
I just fixed a NV-FJ730 having the loose magnet issue, but it continues to show 2 00 21, whereas I understand 21 is "PG automatic adjustment error"
Has anybody an idea?
Playback of VHS/S-VHS looks normal booth in SP and LP.
In another manual I found 21 stands for "the vertical synch signal is lacked while over five seconds on the alignment tape"
hello!, please help me with my camera, the screen is white and when zoomed in the lens won't move [my suspicion is the dynamo is moving] is there a way to fix my camera?, the camera I have is a Sony DCR TRV 480e, yes you I know that what I have is an old camera. please help me thanks!
@@Matt_Quinn-Personal_Account
oh..., I disassembled the back panel of my hadycam screen and I didn't find any oddities that I saw but I didn't really dare to dismantle the lens, you also know that if you disassemble an old camera, maybe some of the components won't function completely, and thank you for your input. !
@@Matt_Quinn-Personal_Account no, I didn't disassemble it carelessly - instead I watched several tutorials on UA-cam, yes I also read several tutorials in old camera books, if anyone offended me with my words, I apologize once again!
i had a 1990s japanese imported model svhs with tbc but it died beyond repair as the basket had bent and put stress on the motors over time. It could not be repaired.
What is your top 5 S-VHS in terms of the best picture quality?
Sometimes a machine which is great for one tape isn't the best for another, so you can't always say one machine is better than another. Good workhorses include Panasonic NV-HS930, AG-4700/NV-HS1000, JVC HR-S7600 and several similar JVC/Philips models which include a TBC. Personally not so impressed with Panasonic AG-7650 or JVC professional grade decks which seem to suffer from head wear and capacitor problems. I don't like the pictures from Panasonic NV-HS950 even though it should be very similar to NV-HS1000. I think it's helpful to have a fleet of different models from Panasonic and JVC in case a poor tape plays better in one than another.
This was my least favorite medhanism to work on. The timing is a PITA and the parts are flimsy.
Just shows you that you do not have a clue. So now let’s get superglue out. Why don’t you build the whole deck with superglue? Don’t even have a tool for that little grub screw lol and not even alignment tape. Oh and no tool is an overkill they was made for a reason but you think a screwdriver and superglue is all you need lol. You shouldn’t put superglue on it because you can cause more force. Would you superglue engine fins on to see if it will hold. Think you need to learn forces in spinning at high speeds,etc. not going to go into it because you wouldn’t understand anyway. Buy yourself some decent decks and transfer and do a channel on that because you don’t have a clue or the tools for repairing.
One point which certainly made me LOL was using an alignment tape. They were last manufactured about 20+ years ago and were usually pounded to death by service departments. It's not like you can just order a new one of those from Panasonic, here in 2024.
@@video99couk well I still have some but still to the point superglue. I still have my repair service kits with all the tools because of being a service engineer and we used the right tools and not superglue. And like I said learn how forces work and gravity the thing that keep you on this planet. You can back yourself up as much as you like but your what’s called a piss poor job and nothing who knows about these things would work the way you do. Don’t ever try to fix laserdisc players or optical recorders, because you would how to learn how to use your tools and not a lucky screwdriver and superglue.
@@Matt_Quinn-Personal_Account don’t make you laugh. You’re a joke in repairs. I attack because I spend most of my time repairing these mess ups that people like you have done. Laptops are the top thing for repair videos on here showing people how to mess them up more, phones are a big thing too. I don’t care what you know or are but you know nothing about repairs and have very basic knowledge on this. Also I don’t want to start a channel, because I don’t want people trying this that could lead them to harm. We are playing with electricity after all, also I don’t have the time to teach people. Because to teach them takes years of studying and not a short video.
Why do you bother to watch this channel if it offends you so much?
@@barrieshepherd7694 I don’t, for some reason these videos keep popping up on my watch list with other stuff I don’t watch. Maybe it’s to do with other channels linking them. Also it’s because I don’t want people trying this thinking they might be able to fix theirs and mess it right up or worse electrocute themselves. All vcr repairs need special equipment to put them right, even tension you use a special meter to put it right. Speed it’s playing,etc it all done with equipment and not superglue. But what do I know only fixed this stuff for most of my life. Anyway if you want a good vcr you still can get new old stock. Also you can still get parts, you just got to know where to go.
panasonic nv-hs930eе, no vedeo signall , audio is ok