Outstanding.. VCR Friday! I just can't pass up watching one of these videos. It doesn't matter what brand or model but always entertaining to listen to your opinions and observations from years and years of experience. The really Big Bonus though is seeing how you approach things, kind of like Don Quixote.. but you almost always succeed!
Good video. It is always difficult to fix something when a third person has already unleashed his "expertise" on it. I am always very reluctant in such cases. Still, your videos are always educational and especially your caring and calm approach to a problem is super. Regards. Andy
I like those scissors and plan to buy a pair at some point. I dont know why people would complain about using them, whatever the tech is comfy with. I learn so much here, really glad he shares his knowledge.
Great video! Bit of a unrelated question here, my Panasonic NV-HS900 has a problem where it doesn‘t react at all to the HiFi Rec Level potentiometers on the front. It seems to just be stuck on maybe -7 dB input level. I cleaned the potentiometers already and also continuity tested the cables that go from the front panel to the board, they tested good and the cleaning also didn‘t make a difference. When playing back a properly recorded tape, the audio levels all seem correct. All cables connected to the VCR are also ok, I tested with another VCR. Any idea what the culprit for that could be? Thanks in advance!
It‘s purely manual, there‘s no switch sadly. What‘s also very weird is that it sometimes, out of the blue, just starts working again. I‘ll probably get the main board out next weekend, i‘ll check it for loose soldering connections too.
Not sure of the age point of this being S-VHS, but my experience of Elna caps has been the opposite of yours... Think we've spoken about it before & it was an era-specific thing since most of the kit I play with that contains them is between 1962-1985. Mind you, most 'lytics went downhill rapidly from the early '90s anyway! Nice to see the old VCRs getting some love again, there's something nostalgic for me about the sound of a tape loading into the transport/head spinning up that online viewing just can't replace for all it's high resolution and instant gratification.
@@12voltvids Thank you for the Information - I found out a company in Germany but I don't remember the name of it. hahaha :-) Best Regards Volker from Vienna
Smashing repair dave, works spot on :-D One nicely cooked psu, most of the parts did well, even cooked lol. Most switchmodes would not have lasted so well. Yes the elna caps are crap grade, but how old is that vcr? About 20 years back maybe, not bad really:-D I guess if sony filled the unit with Rubycon or similar, no one would like the final cost. Yes i remember you doing one of those supplys before, i dont think it was just caps.
The holes in the head for for the dihedral adjustment screws. This was an adjustment not needed on VHS but Beta techs had to make this adjustment when a head was replaced. There are set screrws in there to adjust the angle of the head chip. Never touch them, or you will be buying a new head. They were set at the factory with a microscope.
It annoys me to no end that manufacturers *knowingly* put Elna caps, that spill their guts and damage traces, in high-end electronic equipment. Despite all this, you've managed to get this expensive VCR back to good working order -- which is simply amazing!
At the time of manufacture they didn't know these caps would blow so fast. They put out an order for specific quantity and specification of caps to various companies and pick the one that gives them the best price. This is how it works. Notice that there were both Panasonic and Elna caps in this one. I have seen these units with Elna where the Panasonic ones were in this one meaning that at some point the Panasonic because a better price or vise versa and they changed during the run.
That’s what I like about Panasonic Technics! They use the quality components, that’s why they last so long , have you noticed also that there belts last 30-40 years! That’s impressive, Sony lost there touch a long long time ago the sl 2000 was pretty much the best machine they ever made!!!
Depends on the format the client wants. For those that want DVD I use a stand alone Toshiba DVD recorded and go straight to disk. If they want AVI files, then I use a Sony GV-HD700 which digitizes composite or S video to DV25 standard.
@@12voltvids I really can't spend $1300 or around a $1,000 US Dollars for a capture card. Is there one in between that will do the job for now as I am just getting into this business. By the way I live in the US.
@@chrisschanneloftechnology4743 If you want the quality this is what it will cost you. Cheap consumer devices just don't cut it. The Sony I have is also a mini DV / HDV deck. Many mini DV and digital 8 camcorders would digitize to firewire If you use a cheap card you will also need a time base corrector. The high end ones have that built in.
Elna caps. When I see them I pull them. Can't say how many boards have been destroyed by these. Worse was an Advantest SA. Power supply boards were so bad I was never able to get them running.
That sound like a you problem. Every busy shop looks this way because cleaning time is not paying the bills. You should see behind the camera at Carlson's place. It might look neet and tidy on camera but behind the camera 8t looks like a bomb went off and that is right from Paul's mouth.
Hi.I am in need of some help.i have slv 615 with no power at all.And also a slv 625 with stand by light on and when press the power button the whole system goes completely dead(no clock).i would really appriciate your help thank you.
@@12voltvids you mean, both lens and spindle motor are broken? What is your suggestion sir? Can I replace the cd player with a new lens ang spindle, even a different brand? I still want to use my cd player, please help me.
@@robertpascua5264 The motor won't spin until a disk is detected. The laser should try to move towards the spindle first to activate the top (top of disk) switch. Once that pin or leaf switch is activate it turns on laser and attempts to focus and if a disk is detected starts the spindle motor. So check the sled and top switch first.
@@madpom2 SLV-575UC, SLV-595HF, SLV-696HF. If you don't have the skills or parts to repair them if the threading gear is broken, then buy refurbished. I've got a couple listed on eBay right now (SLV-595HF). I sold the SLV-575UC I had today.
Hi im 16 years old and ive been watching your vids for a while now and i need help. I have a 1980 bradford/samsung crt b&w tv and i vaccumed the board because it was very packed with dust then when i put it back together i think i knocked something loose while i vaccumed it. It works fine except for the audio it has weak audio and it just pops an crackles and cant barely hear anything so if anybody could help me that would be great thanks.
I can tell you exactly what happened to main electronics as I personally knew the owner. Main electronics was started by Phil Tomlinson, his son Daniel started working there when he was about 13. Phil and Dan ran the shop right to the end. I remember going in during the last few years that the shop was open and seen Dan looking very thin he lost a lot of weight you don't like to ask but you know it's cancer. Last time I saw Dan we've been summer 2016. He looks horrible couldn't stand for long had to sit at the counter and you could just tell that he wasn't doing that well the next time I went back was to look for a part for that leak Delta 75 and his son informed me that Daniel had passed just a few weeks after his grandfather. His son Scott I guess didn't want to continue the business and since they own the building it was worth a lot of money. The day I bought that transistor to fix the leak Delta 75 was the last day the shop was open. Scott told me that they were going to close down and take a total inventory and then he would decide whether he would reopen or not. They never reopened they sold off the inventory and I don't even know what went in where the store was because I haven't been past there since that time. I'll go over to Lee's or RP to get my parts locally. What I do know is the owner of Lee's who used to have his shop just up the street offered to buy the business and move into where Main was, but they wouldn't lease him the space telling him the building was going to be sold, so Lee's moved over to Fraser St. It's important to support shops like Lee's because they are becoming few and far between, and the best way to ensure that we have these types of businesses is to support them.
@@12voltvids A verry big thankyou Dave. Shops like main electronics are very rare now and days, and will be missed. But even more so are the teckies out there like yourself who give more than you realize. You keep the worth of these old but new pieces to the next generation going, and are able to keep most of what you are able to out of the landfill, But even more so is the selflessness you give in teaching of how these problems can be fixed when they pop up. You are a great inspiration to those like me who love to not throw away because it's simply broken. You are a good soul Dave. Thankyou for all your hard work in shareing and careing...
@@lawrencecavens5760 Yes we are a dying breed. I am probably one of the younger techs out there and i see 60 knocking at the door. All my mentors when I was learning the trade aren't around anymore. One of the reasons I do these videos is to get younger generations interested in keeping these old beasts running. Us old guys won't be around forever so this is basically passing the torch, and making a buck or 2 while I am at it. Also keeps the mind sharp,
I thoroughly enjoy any video that deals with power supply repair, since they are fairly universal (meaning tons of electronics have them, if not most.) I am just right now at the point where you are showing the leaky caps and effect on the board. It really has to make you wonder, well not really if you really know (planned obsolescence) why gear exists from the 70s, 60s and earlier with operationally-perfect caps and you can buy something today with failing caps in a year. Early 2000s, the capacitor plague wiped out tons and tons of PCs. That's when China stole electrolyte formula but would use it wrong, or maybe they stole something intended to mess them up in the first place. Dell paid dearly for this, hah! Now, for me to pay attention on how you make it well. :) en.wikipedia.org/wiki/Capacitor_plague
The reason why capacitors from the 60s and 70s did not have the problem that the current generation do is due to the chemical makeup of the electrolytic. Old capacitors were typically oil-based and used PCB oil in their composition and as you know pcbs are carcinogen and are now banned. The next generation used fish oil as the electrolyte the problem with fish oil is that the pH is not stable and it has a tendency to change pH depending on the state of charge in the capacitor. This pH change caused the electrolyte to become either slightly base or slightly acidic in either condition the rubber plug on the end of the cap was deteriorated also the copper wires were etched by this acidic or base fluid causing leakage at the seal. Newer capacitors use a water-based electrolytic the problem with water-based electrolytics is water boils at 100° C so water-based was only good for capacitors rated at 85° C. Power supplies especially switching power supplies operate at high frequencies and pulse load which generates heat in the capacitors this requires a high temperature electrolytic still water-based but with additives to prevent the water from boiling some of the early chemical compositions did not hold up and a lot of pressure to build up causing the cap to pop the vent this is known as the bulged popped capacitor. So to sum it up old PCB caps last forever fish oil-based caps typically eat through the rubber plug and leak onto the board because the electrolytic is corrosive and the water-based caps the early water-based caps had a tendency to boil and blow the pressure seal.
@@12voltvids I try to learn something new each day. That has me covered for the whole week haha! Yeah yeah, even on the supply in this video and even though there is no room, I still always think "fan." Usually, not so practical for such a piece of gear (unwanted noise by most people and other factors.) I keep the PSU to my main PC rig on top of the case instead of inside. It and everything else stays far cooler this way. If anything, it should give it a little bit of longer life, even if was going to last long anyhow.
I like those snips. They're pricey but they last. I buy snips in bulk from China but they come with all 3d printers so I have a bunch from there too. Old Christian Slater at his finest wha
@@12voltvids I quit buying these on eBay for "parts". I fixed and sold a few. The smell of that electrolytic that leaks out is too much for me to handle on a regular basis. And running jumpers all over the place.is just not worth my time.
@@12voltvids absolutely. The problem is nobody seems willing to pay what I'm willing to take. 😂 I do sell a TON of SLV-R1000s though. Ten last month and 6 this month already. I shipped you some parts you may or may not need for some of these Sony mechanisms. Might be a month for the post office if get them to you but they're coming!
those awful psu's,similar to slv715's in the uk, i knew 3 of those, all went to landfill, best end to them, i remember one that the caps leaked all over the board and totally fubared it and at the time new ones were still available as a complete unit around £100 a pop
@@leonjohnsonjr3331 primary. If the oscillator is not running you won't get anything on secondary. If you have any voltage on the secondary side then the ic is ok.
Well I drove past the little bastard and it unloaded on my car. Took me 3 trips through the car wash to get rid of the smell, and I certainly wasn't washing it in my driveway. I could smell it in my car for about 2 weeks.
On my old sony ta-636 amp sony fitted felt pads to absorb any cap leakage that may happen, and cannabis is a fuc+++g nightmare to deal with here in the UK dave, although its illegal the police wont do a damn thing, my neighbour is heading for a smack in the face
Well they legalized it here and sell it in government stores and people can grow 4 plants themself. There are several commercial grows that have been nicknamed the "pot houses". Stinks. Makes no difference to me.
I'd argue about Elna being so crap. To be fair, all early low ESR electrolytics leak. Yes, these Elna Long Life series started to be notorious for leakage about 5 years earlier then other big brands, but all brands are affected. I've seen a lot of Nichicon, Nippon Chemi-Con and especially Panasonic low-ESR caps leaking. Maybe Rubycon is less problematic, at least for leakage (they like to pop instead...). I've seen a lot of Panasonic G mech VCRs from like 1992 that had loads of leaking Panasonic capacitors in the PSU as soon as 2002. Some series from Panasonic are actually worse then these Elnas. I'm starting to see generic 85°C Panasonic caps from mid '70s - mid '80s leaking (the light purplish-blue.ones with red markings). The majority of SMD caps in Sony camcorders are usually Nippon Chemi-Con (the bigger ones has the badge on them), they all leak, just like any other SMD electro from that period. I repaired a Sony BVM monitor from about 1991 in 2020 that had many leaking Nippon Chemi-Con caps in the PSU, one of them caused carbon tracking, burnt a 1/2" hole in the PCB, and burnt up the flyback coil of the -15V buck regulator.
When you said light purple Panasonic caps, I looked at the servo board of a 1982 Panasonic VCR and sure enough, there are two 33uF 16V caps that are leaking green stuff around their negative terminals. Good stuff...
@@crashbandicoot4everr Very familiar... I'll hopefully restore a Panasonic NV-FS1 (first S-VHS from Panasonic AFAIK), fortunately it does not have a lot of leaking caps. I bought it from a repair shop, they gave up on it. They've replaced only about 4-6 caps on the different boards (and all caps in the PSU, but they 'stolen' back the new caps prior to selling it), now it has one single capacitor that's leaking, guess what it is: a purple Panasonic with red markings... It has a ton of pink/purple ELNA on the HiFi board, they might all be open, but none of them leaking yet (2 were replaced by the shop on that board, there're signs of leakage around them, they might have been ELNAs originally).
@@crashbandicoot4everr This one has two ceramic hybrid modules (luma and chroma) with one QFP package ASIC per module and a bunch of SMD parts on them. Fortunately zero electrolytics, those are just on the phenolic boards.
Awesome repair! Amazing to see you bring the dead back to life! Thanks for this vid mate.
Outstanding.. VCR Friday! I just can't pass up watching one of these videos. It doesn't matter what brand or model but always entertaining to listen to your opinions and observations from years and years of experience. The really Big Bonus though is seeing how you approach things, kind of like Don Quixote.. but you almost always succeed!
Good video. It is always difficult to fix something when a third person has already unleashed his "expertise" on it. I am always very reluctant in such cases. Still, your videos are always educational and especially your caring and calm approach to a problem is super. Regards. Andy
Excellent repair nice vid! Thank you for hints and know how. 👍
I like those scissors and plan to buy a pair at some point. I dont know why people would complain about using them, whatever the tech is comfy with. I learn so much here, really glad he shares his knowledge.
Well done. nice work. I never loved to open up VCR's. Especially the older ones. Those were much more complicated somehow.
As usual its great job!!
Excellent work!! Thank you!! :)
You sir are a surgeon 😷, awesome vid thx!
Superb
well done
Hello brother I like your video Thank you
I'm now wanting to download and watch Pump Up The Volume, having not seen it before.
Hard Harry, LOL
@@12voltvids greetings new to your channel need to ask a question
What brand of capacitor do you use for replacements?
Hi can capacitors on the video board cause a blank screen to be shown in playback, mine does that if I load any tape it shows blank screen,
I have a pair of Klein scissors pretty much just like yours Dave. Hahaha...
Where can you get Molykote grease in Canada?
YES!
NO!
Great video! Bit of a unrelated question here, my Panasonic NV-HS900 has a problem where it doesn‘t react at all to the HiFi Rec Level potentiometers on the front. It seems to just be stuck on maybe -7 dB input level. I cleaned the potentiometers already and also continuity tested the cables that go from the front panel to the board, they tested good and the cleaning also didn‘t make a difference. When playing back a properly recorded tape, the audio levels all seem correct. All cables connected to the VCR are also ok, I tested with another VCR. Any idea what the culprit for that could be? Thanks in advance!
No not familiar with that model. Is there an auto / manual record level switch hidden somewhere, perhaps in a menu on the remote?
It‘s purely manual, there‘s no switch sadly. What‘s also very weird is that it sometimes, out of the blue, just starts working again. I‘ll probably get the main board out next weekend, i‘ll check it for loose soldering connections too.
I almost spat out my coffee when I heard "capacitor piss". LOL.
Not sure of the age point of this being S-VHS, but my experience of Elna caps has been the opposite of yours... Think we've spoken about it before & it was an era-specific thing since most of the kit I play with that contains them is between 1962-1985. Mind you, most 'lytics went downhill rapidly from the early '90s anyway! Nice to see the old VCRs getting some love again, there's something nostalgic for me about the sound of a tape loading into the transport/head spinning up that online viewing just can't replace for all it's high resolution and instant gratification.
Do you have any idea where I can get new (new old stock) pinch roller for the VHS machines? Best Regards Volker from Vienna / Europe
Off hand no. Don't know of any sources.
@@12voltvids Thank you for the Information - I found out a company in Germany but I don't remember the name of it. hahaha :-) Best Regards Volker from Vienna
Looks like it's the late 80s-early 90s ELNA caps that leak. Because my 1979-83 JVC machines are full of ELNA caps and they are still working.
Smashing repair dave, works spot on :-D
One nicely cooked psu, most of the parts did well, even cooked lol.
Most switchmodes would not have lasted so well.
Yes the elna caps are crap grade, but how old is that vcr?
About 20 years back maybe, not bad really:-D
I guess if sony filled the unit with Rubycon or similar, no one would like the final cost.
Yes i remember you doing one of those supplys before, i dont think it was just caps.
These ones were blowing up like this when they were about 3 years old.
@@lesoram6236 Im 47, and lived through the whole 80s and 90s VHS bullshit, i say good riddance they were a certifiable nightmare from day one.
@@lesoram6236 i remember fixing these ones in the 90s. They were blowing up left right and center.
@@Synthematix I said good riddance to tape too. All forms of tape.
@@lesoram6236 I have a classic tape recorded from MTV from an illegal satellite dish. I thinik it was 1981 I recorded it.
Is going to buy scissors like yours :-)
What’s going on with that plasma tv in the intro part of the video?
Melt down.
I had a couple of these years ago I tried to fix, but the power supply boards were SO far gone, the caps just ate them alive.
a question if you dont mind, what is the use of all those holes drilled in the tape head? is it for balancing?
The holes in the head for for the dihedral adjustment screws. This was an adjustment not needed on VHS but Beta techs had to make this adjustment when a head was replaced. There are set screrws in there to adjust the angle of the head chip. Never touch them, or you will be buying a new head. They were set at the factory with a microscope.
@@12voltvids many thanks for your reply
It annoys me to no end that manufacturers *knowingly* put Elna caps, that spill their guts and damage traces, in high-end electronic equipment. Despite all this, you've managed to get this expensive VCR back to good working order -- which is simply amazing!
At the time of manufacture they didn't know these caps would blow so fast. They put out an order for specific quantity and specification of caps to various companies and pick the one that gives them the best price. This is how it works. Notice that there were both Panasonic and Elna caps in this one. I have seen these units with Elna where the Panasonic ones were in this one meaning that at some point the Panasonic because a better price or vise versa and they changed during the run.
That’s what I like about Panasonic Technics! They use the quality components, that’s why they last so long , have you noticed also that there belts last 30-40 years! That’s impressive, Sony lost there touch a long long time ago the sl 2000 was pretty much the best machine they ever made!!!
Nice repair video. What do you use as a capture card for Digitizing vhs tapes?
Depends on the format the client wants. For those that want DVD I use a stand alone Toshiba DVD recorded and go straight to disk. If they want AVI files, then I use a Sony GV-HD700 which digitizes composite or S video to DV25 standard.
@@12voltvids I am having trouble getting a decent rca to USB adapter so I can digitize my vhs tapes
@@chrisschanneloftechnology4743
Most of those are garbage. My unit was 1300.00
@@12voltvids I really can't spend $1300 or around a $1,000 US Dollars for a capture card. Is there one in between that will do the job for now as I am just getting into this business. By the way I live in the US.
@@chrisschanneloftechnology4743
If you want the quality this is what it will cost you. Cheap consumer devices just don't cut it. The Sony I have is also a mini DV / HDV deck. Many mini DV and digital 8 camcorders would digitize to firewire
If you use a cheap card you will also need a time base corrector. The high end ones have that built in.
Elna caps. When I see them I pull them. Can't say how many boards have been destroyed by these. Worse was an Advantest SA. Power supply boards were so bad I was never able to get them running.
We had a phrase for Elna.
Electrolyte
Leaks
Not
Acceptable.
The skunk could be the star “ PePe Le Pew !!!
Excellent repair. Lots of knowledge. The only thing it bothers me is how much junk you have on your work space. I have OCD so please forgive me.
That sound like a you problem. Every busy shop looks this way because cleaning time is not paying the bills. You should see behind the camera at Carlson's place. It might look neet and tidy on camera but behind the camera 8t looks like a bomb went off and that is right from Paul's mouth.
If you see a messy workshop like that you can guarantee you’re dealing with an experienced pro.
@@walle637 Right because we are too busy to waste time cleaning the place up. That is for the slow days, and those days never happen.
@@12voltvids Sounds exhilarating. Working retail, those fast days really got your blood pumping but your legs just ache by the end of the day.
Hi.I am in need of some help.i have slv 615 with no power at all.And also a slv 625 with stand by light on and when press the power button the whole system goes completely dead(no clock).i would really appriciate your help thank you.
Wouldn't know without it sitting on my bench in front of me.
@@12voltvids ill change all the caps and see if that brings them back to life.thanks for your reply
Sir what is the posible defect with a cd player if the lens does not have a light and the spindel motor is not working?
It's broken.
@@12voltvids you mean, both lens and spindle motor are broken? What is your suggestion sir? Can I replace the cd player with a new lens ang spindle, even a different brand? I still want to use my cd player, please help me.
@@robertpascua5264
The motor won't spin until a disk is detected. The laser should try to move towards the spindle first to activate the top (top of disk) switch. Once that pin or leaf switch is activate it turns on laser and attempts to focus and if a disk is detected starts the spindle motor. So check the sled and top switch first.
In Europe model Sony slv 815, audio board is bad Elna caps. Replace all Elna caps, and clean HiFi board isopropil alc .Great day From Serbia.
"Capacitor Golden Shower" probably still OK though.
What a kool Sony. Slv r5 s vhs vcr
like👍
are these vcrs any good sony slvx811 that you know of please
Unless you like repairing your VCRs regularly, buy another model.
thanks for that can you reccomend a model for dubbing please
@@madpom2
SLV-575UC, SLV-595HF, SLV-696HF. If you don't have the skills or parts to repair them if the threading gear is broken, then buy refurbished. I've got a couple listed on eBay right now (SLV-595HF). I sold the SLV-575UC I had today.
Like!!!
This is one of Sony's most beautiful VHS machines, but these models nearly always have power supply issues and the blue gear cracking problem.
Hi im 16 years old and ive been watching your vids for a while now and i need help. I have a 1980 bradford/samsung crt b&w tv and i vaccumed the board because it was very packed with dust then when i put it back together i think i knocked something loose while i vaccumed it. It works fine except for the audio it has weak audio and it just pops an crackles and cant barely hear anything so if anybody could help me that would be great thanks.
I was wondering why Main electronics shut down and what happened
I can tell you exactly what happened to main electronics as I personally knew the owner. Main electronics was started by Phil Tomlinson, his son Daniel started working there when he was about 13. Phil and Dan ran the shop right to the end. I remember going in during the last few years that the shop was open and seen Dan looking very thin he lost a lot of weight you don't like to ask but you know it's cancer. Last time I saw Dan we've been summer 2016. He looks horrible couldn't stand for long had to sit at the counter and you could just tell that he wasn't doing that well the next time I went back was to look for a part for that leak Delta 75 and his son informed me that Daniel had passed just a few weeks after his grandfather. His son Scott I guess didn't want to continue the business and since they own the building it was worth a lot of money. The day I bought that transistor to fix the leak Delta 75 was the last day the shop was open. Scott told me that they were going to close down and take a total inventory and then he would decide whether he would reopen or not. They never reopened they sold off the inventory and I don't even know what went in where the store was because I haven't been past there since that time. I'll go over to Lee's or RP to get my parts locally. What I do know is the owner of Lee's who used to have his shop just up the street offered to buy the business and move into where Main was, but they wouldn't lease him the space telling him the building was going to be sold, so Lee's moved over to Fraser St. It's important to support shops like Lee's because they are becoming few and far between, and the best way to ensure that we have these types of businesses is to support them.
@@12voltvids A verry big thankyou Dave.
Shops like main electronics are very rare now and days, and will be missed. But even more so are the teckies out there like yourself who give more than you realize.
You keep the worth of these old but new pieces to the next generation going, and are able to keep most of what you are able to out of the landfill, But even more so is the selflessness you give in teaching of how these problems can be fixed when they pop up. You are a great inspiration to those like me who love to not throw away because it's simply broken. You are a good soul Dave. Thankyou for all your hard work in shareing and careing...
@@lawrencecavens5760 Yes we are a dying breed. I am probably one of the younger techs out there and i see 60 knocking at the door. All my mentors when I was learning the trade aren't around anymore. One of the reasons I do these videos is to get younger generations interested in keeping these old beasts running. Us old guys won't be around forever so this is basically passing the torch, and making a buck or 2 while I am at it. Also keeps the mind sharp,
I thoroughly enjoy any video that deals with power supply repair, since they are fairly universal (meaning tons of electronics have them, if not most.) I am just right now at the point where you are showing the leaky caps and effect on the board. It really has to make you wonder, well not really if you really know (planned obsolescence) why gear exists from the 70s, 60s and earlier with operationally-perfect caps and you can buy something today with failing caps in a year. Early 2000s, the capacitor plague wiped out tons and tons of PCs. That's when China stole electrolyte formula but would use it wrong, or maybe they stole something intended to mess them up in the first place. Dell paid dearly for this, hah! Now, for me to pay attention on how you make it well. :) en.wikipedia.org/wiki/Capacitor_plague
Paul Carlson, (of Mr. Carlson's Lab channel) says that quite often, capacitance can go up in value in failing caps. I never knew that before!
The reason why capacitors from the 60s and 70s did not have the problem that the current generation do is due to the chemical makeup of the electrolytic. Old capacitors were typically oil-based and used PCB oil in their composition and as you know pcbs are carcinogen and are now banned. The next generation used fish oil as the electrolyte the problem with fish oil is that the pH is not stable and it has a tendency to change pH depending on the state of charge in the capacitor. This pH change caused the electrolyte to become either slightly base or slightly acidic in either condition the rubber plug on the end of the cap was deteriorated also the copper wires were etched by this acidic or base fluid causing leakage at the seal. Newer capacitors use a water-based electrolytic the problem with water-based electrolytics is water boils at 100° C so water-based was only good for capacitors rated at 85° C. Power supplies especially switching power supplies operate at high frequencies and pulse load which generates heat in the capacitors this requires a high temperature electrolytic still water-based but with additives to prevent the water from boiling some of the early chemical compositions did not hold up and a lot of pressure to build up causing the cap to pop the vent this is known as the bulged popped capacitor. So to sum it up old PCB caps last forever fish oil-based caps typically eat through the rubber plug and leak onto the board because the electrolytic is corrosive and the water-based caps the early water-based caps had a tendency to boil and blow the pressure seal.
@@12voltvids I try to learn something new each day. That has me covered for the whole week haha! Yeah yeah, even on the supply in this video and even though there is no room, I still always think "fan." Usually, not so practical for such a piece of gear (unwanted noise by most people and other factors.) I keep the PSU to my main PC rig on top of the case instead of inside. It and everything else stays far cooler this way. If anything, it should give it a little bit of longer life, even if was going to last long anyhow.
Yup. I replaced the power supply in one once. . . .
I like those snips. They're pricey but they last. I buy snips in bulk from China but they come with all 3d printers so I have a bunch from there too.
Old Christian Slater at his finest wha
I always wanted onr of these vcrs but everyone I find there are broken
They all need rebuilding.
@@12voltvids
I quit buying these on eBay for "parts". I fixed and sold a few. The smell of that electrolytic that leaks out is too much for me to handle on a regular basis. And running jumpers all over the place.is just not worth my time.
@@NunYa953 I feel the same way, but when someone is paying me to do it, no problem.
@@12voltvids absolutely. The problem is nobody seems willing to pay what I'm willing to take. 😂 I do sell a TON of SLV-R1000s though. Ten last month and 6 this month already. I shipped you some parts you may or may not need for some of these Sony mechanisms. Might be a month for the post office if get them to you but they're coming!
those awful psu's,similar to slv715's in the uk, i knew 3 of those, all went to landfill, best end to them, i remember one that the caps leaked all over the board and totally fubared it and at the time new ones were still available as a complete unit around £100 a pop
Mitsubishi had pissy caps too, and they used a linear supply.
I finally got one it was completely dead I change every capicator but still dead
How is the ic on the power supply. They do fail.
@@12voltvids which side on the secondary side
@@leonjohnsonjr3331 primary. If the oscillator is not running you won't get anything on secondary. If you have any voltage on the secondary side then the ic is ok.
It's 4.5mm on the half load arm bolt for anyone who cares.
I have stroked a skunk she didn't give off a whiff!!!it was ok
Well I drove past the little bastard and it unloaded on my car. Took me 3 trips through the car wash to get rid of the smell, and I certainly wasn't washing it in my driveway. I could smell it in my car for about 2 weeks.
Elna LongLife.
Now there's a contradiction in terms...
Elna... Electrolytic leaks not acceptable!
cool ! The outro is stolen from earlier 12voltvids Videos :-))
The 1uf 200 is bad everytime
On my old sony ta-636 amp sony fitted felt pads to absorb any cap leakage that may happen, and cannabis is a fuc+++g nightmare to deal with here in the UK dave, although its illegal the police wont do a damn thing, my neighbour is heading for a smack in the face
Well they legalized it here and sell it in government stores and people can grow 4 plants themself. There are several commercial grows that have been nicknamed the "pot houses". Stinks. Makes no difference to me.
ELNA Where A1 Caps. Panasonic are bad.
Nah, dude, you got it backwards
I'd argue about Elna being so crap. To be fair, all early low ESR electrolytics leak. Yes, these Elna Long Life series started to be notorious for leakage about 5 years earlier then other big brands, but all brands are affected. I've seen a lot of Nichicon, Nippon Chemi-Con and especially Panasonic low-ESR caps leaking. Maybe Rubycon is less problematic, at least for leakage (they like to pop instead...).
I've seen a lot of Panasonic G mech VCRs from like 1992 that had loads of leaking Panasonic capacitors in the PSU as soon as 2002. Some series from Panasonic are actually worse then these Elnas. I'm starting to see generic 85°C Panasonic caps from mid '70s - mid '80s leaking (the light purplish-blue.ones with red markings).
The majority of SMD caps in Sony camcorders are usually Nippon Chemi-Con (the bigger ones has the badge on them), they all leak, just like any other SMD electro from that period. I repaired a Sony BVM monitor from about 1991 in 2020 that had many leaking Nippon Chemi-Con caps in the PSU, one of them caused carbon tracking, burnt a 1/2" hole in the PCB, and burnt up the flyback coil of the -15V buck regulator.
They were all crap, but the Elna ones failed really quickly. ELNA, Electrolitic Leaks, Not Acceptable what our slogan for them.
When you said light purple Panasonic caps, I looked at the servo board of a 1982 Panasonic VCR and sure enough, there are two 33uF 16V caps that are leaking green stuff around their negative terminals. Good stuff...
@@crashbandicoot4everr Very familiar... I'll hopefully restore a Panasonic NV-FS1 (first S-VHS from Panasonic AFAIK), fortunately it does not have a lot of leaking caps. I bought it from a repair shop, they gave up on it. They've replaced only about 4-6 caps on the different boards (and all caps in the PSU, but they 'stolen' back the new caps prior to selling it), now it has one single capacitor that's leaking, guess what it is: a purple Panasonic with red markings... It has a ton of pink/purple ELNA on the HiFi board, they might all be open, but none of them leaking yet (2 were replaced by the shop on that board, there're signs of leakage around them, they might have been ELNAs originally).
@@mrnmrn1 Don't these early S-VHS machines have those modules with SMD caps that leak and corrode everything? My NV-FS200 does.
@@crashbandicoot4everr This one has two ceramic hybrid modules (luma and chroma) with one QFP package ASIC per module and a bunch of SMD parts on them. Fortunately zero electrolytics, those are just on the phenolic boards.