That was the point. Proving the problem was on the hybrid module. I paid nothing for it, and I will probably get 20 bucks for it as it sits plus whatever the video makes but it will certainly give valuable information for someone with one of these that actually wants to repair the board.
Last 12 months I have had several jobs capturing old family VHS videos for friends. Luckily I had kept 3 recorders, a Panasonic, and two Samsungs. That's probably another reason why people are looking for VHS machines as well as Video8 and DV cameras. I just finished capturing, editing and converting 18 X 90 minute Video8 tapes, all fully recorded. I did not have a Video8 camera and managed to find two Sony camcorders after asking around. The first had a good picture on the viewfinder, but distorted video and audio from the composite/mono outputs. The second, I was assured, was in working order, also composite/mono sound configuration, but as it was being retrieved from a high shelf, it was DROPPED. Will not power on. Finally, I tried a long time friend who told me he had a Sony camcorder that worked last time he tried it, ten years ago, and said I was welcome to take it. Upon retrieval it turned out to be a versatile self-sensing analogue OR digital machine, with stereo audio out AND svideo output as well as the digital output. I hooked it up to my Blackmagic Design capture card using the svideo/analogue audio outputs and it worked beautifully! My friend said it had only ever had two tapes run through it. Job done!
Those thick-film units were always trouble. The caps used in there look identical to the ones used in the Sega Game Gear, also from around the same era. They are almost always 100% toast! You then end up with a console that behaves in a similar fashion to those Casio LCD pocket TV's you fixed previously! Gotta love nineties tech!
I've been watching my decades old VHS tapes the past couple years. Love to watch the old shows and movies I recorded when I was younger. Watching the "Babylon 5" series lately. I bought a JVC SVHS HiFi machine last year on eBay cheap with a dirty mode switch. Been working great since I cleaned it up.
Thank you very much for this. I have a Magnavox VR2072 with a similar mechanism. It was a top end deck in 1988 (but is a step down from the SVHS machines). I actually like to dub my own tapes. One thing that I try to do is make tapes that feel like you are sitting in a theater in the 1930s (my grandfather was a projectionist). I compile a number of movies from the same era (for instance, I put together a tape of depression era westerns and fill it with cartoons from that same time). The Sharp VC-6846U is a great mono unit that has the sound that would make say, a digital remaster of an old movie actually sound like I am watching the movie through an analog projector. DVD issues to my ears use aggressive noise reduction when I know that analog projectors would have a more "compressed" sound like older radios. The aforementioned Sharp does a good job at replicating that "tube sound" in my opinion.
They are not as good as r2r. All hifi video sound is companded. Very similar to dbx, but not exactly the same so they didn't have to license it. You can hear it working if you listen closely. A warbling sound.
I have watched you fix some of your betamax and vhs machines and now this one. You are an amazing technician at that and how fast you can find the problems and fix them. Cheers Mate.
I remember back in the day when people used to pay $100 plus to have heads replaced in their VCRs especially if it was a 4-Head or 6-Head HI-FI machine as they used to cost hundreds of dollars to buy new.
You Did A Good Job On That VCR. A Lot Of People Wouldn't Think To Check The Modual. That's Why I'm Waiting To Get A Hot Air Station So I Can Fix That Portable CD Player With A Bad processor Chip.
Don't get me started on modern tv or movies. They used to leave it to your imagination but lately it seems that stuff that belongs behind closed doors needs to be in your face. Even the advertising now is full of it. Pretty much every commercial, tv show and movie is "woke"
You did put way much work i would had for something that would end up being sold for 20$.... and since the hi-fi isn't still working properley, I don't know if you did, but i would had advertised it as a non-hi-fi machine. Nevertheless, I love watching your videos, I'm myself fixing a lot of those old beta and vhs machines so, every knowledge share is great! I guess I should mount a cam over my bench and make some french live videos as I fix some stuff as well. Cheers!
I have a Panasonic VHS VCR it states it can record in Stereo Hifi, when i dubbed a tape which has Stereo, the copied tape plays in Mono. What could be the issue.
Love watching old equipment return to operation under your skill. I have drawers full of vcr tapes. Would you mind recommending a old vcr for playing them, hi fi stereo. Thank you, Robert
@@12voltvids many of these Panasonic vcrs from the early 90s would sometimes have a weak power supply. I saw an rca panasonic vr323 but it was a 4 head HI-FI deck rather than 4 head mono or 2 head. You would hear sparks or electric sounds coming from the power supply and sometimes when going in to play it would shut off.
PV7541… the drum on mine ticks pretty loud. I think it’s a soldered board on the bottom of the drum, slightly raising the chip makes the sound go away. But all the mechanisms seem great otherwise
I have a Mickey mouse 8mm movie film were Mickey mouse puts on blackface by putting a firecracker in his mouth and lighting it! It was from 1932. Back in the 60s they sold shorts on silent 8mm for movie night at home.
I found A Fisher VCR that as both linear stereo head & plays stereo & Hi-Fi tapes as some older decks only had stereo tapes before HiFi. If u recorded in HiFi it will play HiFi but if you have a VCR with no HiFi but plays stereo then it will play linear stereo. Never seen this but usually Hi-Fi VCR's will record mono linear. Recorded HiFi movies & music tapes are linear mono not stereo.
Used, as it is old the caps are likely bad and shipping from USA will mean minimum 40 broker and shipping fee. So now we are at 77 for a VCR that is worth perhaps 20.
I have only very slight audio on a fb75 can just hear it if headphones are plugged in and what there is is very distorted and not any audio on line outs ,it has a great picture though ,I have new genuine panasonic heads for my 1985 NV-730 this machine is fine at the moment though.
@@12voltvids im glad you got the hifi to come in despite the slight noise in the sound still. Im sure the PUA3228 Cap drive ic2 is good. Hopefully it wont go bad anytime soon.
34:23 "OK let's find out wether it works in stereo" *starts playing the tape and immediately the guy doing the commentary on the BOSE demo tape says "IN STEREO"* LMAO...
I have a Toshiba VCR that works great, but for some reason won't detect the hifi. I know it's not the tapes bc I also have another similar Toshiba that does. The picture and sound in general is good, but the hifi won't work at all. I tried cleaning the heads and messing the azimuth slightly but still nothing
There are many reasons why HiFi audio won't work. The process of recording HiFi is much more involved then linear audio. For starters the audio is modulated onto 2 carriers. These signals are then recorded at a high level into the tape in what is called deep layer recording as very different azimuth angles. +-30'. The video is then recorded overtop of the audio at -+6'. This gives a 36' azimuth shift between the deep layer and surface recording of the video which incidentally when it plows over the audio that was previously recorded it erases about 60% of the signal. There is enough left however that with the steep angle difference the audio heads can pick up the weak signal that remains and amplify the crap our of it, then filter it to get rid of video and chroma that will be present and finally demodulate the signal. As I said lots going on. No audio could be worn heads or a failure of circuitry in the demod circuit. This is one of the things that was superrior with beta, and 8mm for that matter. The audio was recorded between the lower sideband of the lumanence signal and the down converted color. These formats could do it because there was bandwidth available. VHS on the other hand with it's lower bandwidth had to find another way to do it. 2 more heads and a ton of processing. All that extra crap means the HiFi signal is fragile and if anything is a little off, alignment head wear cap leakage ecy the result is muted HiFi and the linear track is selected.
@@12voltvids gotcha and yeah I know it's definitely an issue with the VCR bc I have 2. They're both toshibas and very similar to each other. The one is just a slightly more higher end model and sadly that's the one with the issue. It plays tapes perfectly and has both picture and audio, but the audio is just limited to the linear track. It doesn't switch to hifi no matter what I do, but the sound it has is clear with no dropouts or anything. The other VCR detects the hifi immediately and the picture quality between the 2 is nearly identical too.
Oh wow! This is what I was looking for. I have similar model with busted PSU. Zenner on secondary side is shorted, is there any possibility to figure out what Zenner voltage is it ? Or at least measure output voltages of PSU for this machine ? Or may be you have service manual for this guy ? Thank you
I do have the schematics for this model (power supply part number VJBS01017/VEPS01017). The voltages should be: Unswitched +44V Unswitched +14V Unswitched -30V Unswitched +5V for the system control circuit Unswitched +5V for the video circuit Power down (L) Ground F+ (Filament heater voltage for the display) F- (Filament heater voltage for the display) D1011 in the 5V rail is a 5.1V (MA4051NH) zener and D1015 in the 14V rail is an 18V (MA2180 or RD18FB) zener. PR1001 is an ICP-F38 circuit protector fuse which can blow if there's overvoltage or short in the 5V rail.
@@crashbandicoot4everr Awesome ! Thank you for the reply! I have found some old stock ECG5077A for cheap, which is 18V zenner as well. But could not found some time to fix it ! My module is VEPS01017 as well BTW. If it is possible can you please share the schematic with me? ( My contact info is here -> czcams.com/users/InsideOutElectronicsabout ) Thank you
@@InsideOutElectronics I did post the link for the schematics here but youtube likes to delete comments containing links. I sent them via wetransfer now so you should have them in your inbox. :)
What do you think it causes high frequency noise in linear audio in JVC VCR's? I've sent you an e-mail about this VCR problem with audio samples, If you get chance check it out if you are busy don't worry about it. You may actually end up fixing it.
@@12voltvids It's definitely not the lead vapors ;) But IIRC I've read something about occupational asthma being higher. Just try to solder for a few hours and if your room is kinda closed you'll notice it. So if you do it for years it might have an effect ...
@@machannel8746 Well I did it for 20 years and the shop had no ventilation. In fact the boss would close the door to the shop to stop customers from just walking in and "wasting my time talking to me". The stink from cleaners was almost unbearable. Occupational Hazzard i would say. I'm no worse for wear. In my shop i have good ventilation as i can just open the big door and it will air out quickly and open the side door to get good air flow. Naturally when it is freezing I don't but I am not using many chemicals these days and I don't produce alot of smoke soldering. Nothing compared to what people that smoke or toke do to their lungs. Tobacco and marijuana smoke has far more carcinogenic chemicals than rosin smoke and people intentionally suck it deeply into their lungs and hold their breath for maximum damage. I don't intentionally inhale smoke. I actually avoid it.
hey 12voltvids, I have a Panasonic NV FS 90, with a little problem! the screen and clock does no longer display!! but the video works fine still has a picture, it ff,rw ejects plays ok still! any ideas or anyone know what part i can change? I have 5 for spares with other problems and the screens work on them just no video output. I have 3 power supplies and tested and they all do the same thing, no screen. yup all the screen work on the other machines but have no out put picture.
Swap the VEP07622C timer board from a machine that has a working display. That should fix it if the problem is on the board and not a missing voltage from elsewhere.
@@crashbandicoot4everr hi thanks for the reply, I did that as i have 4 of them and are all doing the same thing, new caps on the power supply i thought might have been the problem. I changed the mainboard now and now have the clock back with the display, but now no video output using all the working parts from the main machine that was all working! its a 2 steps forward then 1 back again. lol
Sony were ok. They had issues. Capstan motor bearing, seized up p6 guide, blue threading gear, power supply leaky caps. Other than that they were good solid performers.
On PCBs you can, but the delicate pads cleaning process can be very time consuming. Depending of the corrosion state you have to scrape, rub with white vinegar/IPA, sometimes redo the pad with copper foil or redo the track or via with a thin enamelled wire, etc. For modules, if it remains simple (for example only few caps/resistors), it could be possible to recreate the module. In this case, we have the luck that resin don't cover it entirely so we can measure the painted resistors, it may be possible to design a PCB as a replacement, reusing the custom IC of course. Some arcade game boards can revive with this kind of recreated modules. So, there are solutions, but it highly depends of what you want to do, considering the required time and soldering/designing level.
I got a old VCR so I could play my tapes for my kids like the Natural Born Killers movie my friends and I spliced crime scene photos & Marilyn Manson, Tool, Nine Inch Nails, and My Life With the Thrill Kill Kult songs into. The modern version of Natural Born Killers was ruined by editing it to be politically correct.
what if the hifi stereo is intermittent? could be dirty heads? but the picture is fine. it depends on the tape, some tapes play with the hifi always on
The way VHS HiFi what's recorded I'm surprised it even plays back at all. Beatrice Hi-Fi uses what they called deep layer recording where the signal is recorded deep into the tape and then the video is laid down on top of it at a different angle. the overlay video signal erases approximately 70% of the audio signal that was previously recorded just before the video signal was laid down over top of it. On playback the only reason you can even detect the audio FM signals that have been over recorded by the FM lumanence signal and the double side band audio signals is due to the 36' azimuth shift between the heads and the narrow band of the audio signals with respect to the video. First two heads have to actually detect the signal and then the singles need to be filtered out from all the noise. as tapes age the weaker audio signals 10 to get lost in the mud just due to self eraser that coupled with the fact that the heads we're down on your playback machine making the recovery impossible. I have multiple VHS machines here that I use for archiving and I would estimate that 1 in 10 tapes I have to switch to mono to get clean sound as the tape has deteriorated and Hi-Fi recovery is not possible. when a customer complains about this site just say too bad so sad you waited too long your tape is shot you're lucky to get anything off of it.
Nice repair! Good way to teach other what was wrong. As you stated not worth fixing but a great training tool for your viewers.
That was the point. Proving the problem was on the hybrid module. I paid nothing for it, and I will probably get 20 bucks for it as it sits plus whatever the video makes but it will certainly give valuable information for someone with one of these that actually wants to repair the board.
I predict a future when VHS machines will go up in price.
The future here - they have. A lot.
Last 12 months I have had several jobs capturing old family VHS videos for friends. Luckily I had kept 3 recorders, a Panasonic, and two Samsungs. That's probably another reason why people are looking for VHS machines as well as Video8 and DV cameras. I just finished capturing, editing and converting 18 X 90 minute Video8 tapes, all fully recorded. I did not have a Video8 camera and managed to find two Sony camcorders after asking around. The first had a good picture on the viewfinder, but distorted video and audio from the composite/mono outputs. The second, I was assured, was in working order, also composite/mono sound configuration, but as it was being retrieved from a high shelf, it was DROPPED. Will not power on. Finally, I tried a long time friend who told me he had a Sony camcorder that worked last time he tried it, ten years ago, and said I was welcome to take it. Upon retrieval it turned out to be a versatile self-sensing analogue OR digital machine, with stereo audio out AND svideo output as well as the digital output. I hooked it up to my Blackmagic Design capture card using the svideo/analogue audio outputs and it worked beautifully! My friend said it had only ever had two tapes run through it. Job done!
Those thick-film units were always trouble. The caps used in there look identical to the ones used in the Sega Game Gear, also from around the same era. They are almost always 100% toast!
You then end up with a console that behaves in a similar fashion to those Casio LCD pocket TV's you fixed previously! Gotta love nineties tech!
I've been watching my decades old VHS tapes the past couple years. Love to watch the old shows and movies I recorded when I was younger.
Watching the "Babylon 5" series lately.
I bought a JVC SVHS HiFi machine last year on eBay cheap with a dirty mode switch. Been working great since I cleaned it up.
Thank you very much for this. I have a Magnavox VR2072 with a similar mechanism. It was a top end deck in 1988 (but is a step down from the SVHS machines). I actually like to dub my own tapes. One thing that I try to do is make tapes that feel like you are sitting in a theater in the 1930s (my grandfather was a projectionist). I compile a number of movies from the same era (for instance, I put together a tape of depression era westerns and fill it with cartoons from that same time). The Sharp VC-6846U is a great mono unit that has the sound that would make say, a digital remaster of an old movie actually sound like I am watching the movie through an analog projector. DVD issues to my ears use aggressive noise reduction when I know that analog projectors would have a more "compressed" sound like older radios. The aforementioned Sharp does a good job at replicating that "tube sound" in my opinion.
VCRS compress the sound a bit. I've heard that drum tracks can benefit from the eq profile. But there's probably better ways to do it.
A lot of audio people using the old stereo sets for Hi quality sound recording and they sound just as good as a R2R
They are not as good as r2r. All hifi video sound is companded. Very similar to dbx, but not exactly the same so they didn't have to license it. You can hear it working if you listen closely. A warbling sound.
I have watched you fix some of your betamax and vhs machines and now this one. You are an amazing technician at that and how fast you can find the problems and fix them.
Cheers Mate.
You are a genius because you can work on electronics and talk at the same time thats very great 😃🌟🌟🌟🌟🌟
I remember back in the day when people used to pay $100 plus to have heads replaced in their VCRs especially if it was a 4-Head or 6-Head HI-FI machine as they used to cost hundreds of dollars to buy new.
I used to change about 4 video head drums a week.
You Did A Good Job On That VCR.
A Lot Of People Wouldn't Think
To Check The Modual. That's Why
I'm Waiting To Get A Hot Air Station
So I Can Fix That Portable CD Player
With A Bad processor Chip.
26:56 - Clip out the bad caps and solder the new caps' leads to the existing 'stubs', avoiding having to heat up the tracks on the board.
i miss the 90s shows i use to watch when i was a kid but now its all messed with and edited or modernised and its just crap
Don't get me started on modern tv or movies. They used to leave it to your imagination but lately it seems that stuff that belongs behind closed doors needs to be in your face. Even the advertising now is full of it. Pretty much every commercial, tv show and movie is "woke"
@@12voltvids Bye bye Bud Light haha.
You did put way much work i would had for something that would end up being sold for 20$.... and since the hi-fi isn't still working properley, I don't know if you did, but i would had advertised it as a non-hi-fi machine. Nevertheless, I love watching your videos, I'm myself fixing a lot of those old beta and vhs machines so, every knowledge share is great! I guess I should mount a cam over my bench and make some french live videos as I fix some stuff as well. Cheers!
It does play hifi, a bit of hiss on left channel.
I have a Matsui which plays great picture, but audio is almost over powered by hissing. Any thoughts?
I have a Panasonic VHS VCR it states it can record in Stereo Hifi, when i dubbed a tape which has Stereo, the copied tape plays in Mono. What could be the issue.
Love watching old equipment return to operation under your skill. I have drawers full of vcr tapes. Would you mind recommending a old vcr for playing them, hi fi stereo. Thank you, Robert
Anything you can find.
That works that is.
@@12voltvids many of these Panasonic vcrs from the early 90s would sometimes have a weak power supply. I saw an rca panasonic vr323 but it was a 4 head HI-FI deck rather than 4 head mono or 2 head. You would hear sparks or electric sounds coming from the power supply and sometimes when going in to play it would shut off.
The vcr king was the user i saw that vcr on.
@@austinthevhsvideogamelover5265
Lots of PSU problems with Panasonic. Fixed hundreds.
@@12voltvids So what would be the best vcr to get?
I need one.
Thank you for the video
Great work Dave
PV7541… the drum on mine ticks pretty loud. I think it’s a soldered board on the bottom of the drum, slightly raising the chip makes the sound go away. But all the mechanisms seem great otherwise
Love your videos
I grew up with Song of the South, Disney doesn't make that available at all now.
I have a Mickey mouse 8mm movie film were Mickey mouse puts on blackface by putting a firecracker in his mouth and lighting it! It was from 1932. Back in the 60s they sold shorts on silent 8mm for movie night at home.
You Can Use A Small Hot Air Station Or A Heat gun.
I don't have one and don't intend to buy one any time soon.
@@12voltvids you Probly
Will Later
I found A Fisher VCR that as both linear stereo head & plays stereo & Hi-Fi tapes as some older decks only had stereo tapes before HiFi. If u recorded in HiFi it will play HiFi but if you have a VCR with no HiFi but plays stereo then it will play linear stereo. Never seen this but usually Hi-Fi VCR's will record mono linear. Recorded HiFi movies & music tapes are linear mono not stereo.
you really killed the snake and showed the stick
The VCRS 0178 is available on Ebay for $29.95.. ships free from Florida
Used, as it is old the caps are likely bad and shipping from USA will mean minimum 40 broker and shipping fee. So now we are at 77 for a VCR that is worth perhaps 20.
20:10 - Solder-wick is the way to go! A solder-sucker cools the joint too fast, blocks one's view and 'treats' them to the smell of burning plastic!
I have only very slight audio on a fb75 can just hear it if headphones are plugged in and what there is is very distorted and not any audio on line outs ,it has a great picture though ,I have new genuine panasonic heads for my 1985 NV-730 this machine is fine at the moment though.
Any idea where I can find a new head for my Panasonic 4 head HiFi VCR?
They are model specific. Try kpcomponents he might have some.
5:21 it says January 10th 1992 on the loading motor.
Well considering the machine was manufactured June 10 1992....
@@12voltvids im glad you got the hifi to come in despite the slight noise in the sound still. Im sure the PUA3228 Cap drive ic2 is good. Hopefully it wont go bad anytime soon.
Well I will never use this machine. It's for sale. Eventually someone will take it off my hands.
34:23
"OK let's find out wether it works in stereo"
*starts playing the tape and immediately the guy doing the commentary on the BOSE demo tape says "IN STEREO"*
LMAO...
It is playing in stereo. Just hissing a bit.
@@12voltvids I was referring to the video on the BOSE tape, not you. It was just a nice coincidence. :)
LOL
What if the machine plays hi fi but not mono? I’m having that problem with two of my machines.
Thanks for the vid Dave... Screw the haters...
Have a couple on 240volts in New Zealand caps replaced but going great will remember those other faults
Hi there I’m trying to fix my Panasonic but it doesn’t seem to have any visible screws
I have a Toshiba VCR that works great, but for some reason won't detect the hifi. I know it's not the tapes bc I also have another similar Toshiba that does. The picture and sound in general is good, but the hifi won't work at all. I tried cleaning the heads and messing the azimuth slightly but still nothing
There are many reasons why HiFi audio won't work. The process of recording HiFi is much more involved then linear audio. For starters the audio is modulated onto 2 carriers. These signals are then recorded at a high level into the tape in what is called deep layer recording as very different azimuth angles. +-30'. The video is then recorded overtop of the audio at -+6'. This gives a 36' azimuth shift between the deep layer and surface recording of the video which incidentally when it plows over the audio that was previously recorded it erases about 60% of the signal. There is enough left however that with the steep angle difference the audio heads can pick up the weak signal that remains and amplify the crap our of it, then filter it to get rid of video and chroma that will be present and finally demodulate the signal. As I said lots going on. No audio could be worn heads or a failure of circuitry in the demod circuit. This is one of the things that was superrior with beta, and 8mm for that matter. The audio was recorded between the lower sideband of the lumanence signal and the down converted color. These formats could do it because there was bandwidth available. VHS on the other hand with it's lower bandwidth had to find another way to do it. 2 more heads and a ton of processing. All that extra crap means the HiFi signal is fragile and if anything is a little off, alignment head wear cap leakage ecy the result is muted HiFi and the linear track is selected.
@@12voltvids gotcha and yeah I know it's definitely an issue with the VCR bc I have 2. They're both toshibas and very similar to each other. The one is just a slightly more higher end model and sadly that's the one with the issue. It plays tapes perfectly and has both picture and audio, but the audio is just limited to the linear track. It doesn't switch to hifi no matter what I do, but the sound it has is clear with no dropouts or anything. The other VCR detects the hifi immediately and the picture quality between the 2 is nearly identical too.
People use them also for music like a big cassette deck some sound awesome too.
Only when recorded on a deck with manual audio level. Most of the later models it was auto level.
i have a panasonic hi fi vcr that shuts off if i push the record button
it's Very George Orwell for people to be looking for old movies...!!
Hi I have some tapes that have a shiny blister type screw, I cannot remove it what screw driver do I need to use.
It's a security bit. They are available. I have a set.
Disney vhs movie tapes used macrovision, so you can't easily convert to DVD.
Edit: PC has ruined a lot of things.
yes nothing beats the wet finger test
a other great video repair
we are Siamese if you please
Thanks dave.
My Siamese cat approves.
What about the missing door ? I wouldn't buy this without a door, not even for 20 bucks. But its just me
Obviously it is broken off. It did sell for 20 bucks so there.
That's awesome..... What can I do to get the sound on a cassette player That's near 40 years old?????????????
Oh wow! This is what I was looking for. I have similar model with busted PSU. Zenner on secondary side is shorted, is there any possibility to figure out what Zenner voltage is it ? Or at least measure output voltages of PSU for this machine ? Or may be you have service manual for this guy ? Thank you
I do have the schematics for this model (power supply part number VJBS01017/VEPS01017). The voltages should be:
Unswitched +44V
Unswitched +14V
Unswitched -30V
Unswitched +5V for the system control circuit
Unswitched +5V for the video circuit
Power down (L)
Ground
F+ (Filament heater voltage for the display)
F- (Filament heater voltage for the display)
D1011 in the 5V rail is a 5.1V (MA4051NH) zener and D1015 in the 14V rail is an 18V (MA2180 or RD18FB) zener. PR1001 is an ICP-F38 circuit protector fuse which can blow if there's overvoltage or short in the 5V rail.
@@crashbandicoot4everr Awesome ! Thank you for the reply! I have found some old stock ECG5077A for cheap, which is 18V zenner as well. But could not found some time to fix it !
My module is VEPS01017 as well BTW. If it is possible can you please share the schematic with me? ( My contact info is here -> czcams.com/users/InsideOutElectronicsabout ) Thank you
@@InsideOutElectronics I can't remember where I downloaded the schematics from. Yes I will upload them once I get home.
@@crashbandicoot4everr Thank you a lot !
@@InsideOutElectronics I did post the link for the schematics here but youtube likes to delete comments containing links. I sent them via wetransfer now so you should have them in your inbox. :)
What do you think it causes high frequency noise in linear audio in JVC VCR's? I've sent you an e-mail about this VCR problem with audio samples, If you get chance check it out if you are busy don't worry about it. You may actually end up fixing it.
I have no idea.
You do need a fume extractor though...
Hey, maybe it's inspiration to try to fix that AG-1970 ? ....
Why would i need a fume extractor? Never had one in any of the shops i worked in. Not like I am dealing with noxious fumes or toxins.
1970 needs many parts. Will have to pick parts off the parts wrecker.
@@12voltvids It's definitely not the lead vapors ;) But IIRC I've read something about occupational asthma being higher. Just try to solder for a few hours and if your room is kinda closed you'll notice it. So if you do it for years it might have an effect ...
@@machannel8746
Well I did it for 20 years and the shop had no ventilation. In fact the boss would close the door to the shop to stop customers from just walking in and "wasting my time talking to me". The stink from cleaners was almost unbearable. Occupational Hazzard i would say. I'm no worse for wear. In my shop i have good ventilation as i can just open the big door and it will air out quickly and open the side door to get good air flow. Naturally when it is freezing I don't but I am not using many chemicals these days and I don't produce alot of smoke soldering. Nothing compared to what people that smoke or toke do to their lungs. Tobacco and marijuana smoke has far more carcinogenic chemicals than rosin smoke and people intentionally suck it deeply into their lungs and hold their breath for maximum damage. I don't intentionally inhale smoke. I actually avoid it.
hey 12voltvids, I have a Panasonic NV FS 90, with a little problem! the screen and clock does no longer display!! but the video works fine still has a picture, it ff,rw ejects plays ok still! any ideas or anyone know what part i can change? I have 5 for spares with other problems and the screens work on them just no video output. I have 3 power supplies and tested and they all do the same thing, no screen. yup all the screen work on the other machines but have no out put picture.
Swap the VEP07622C timer board from a machine that has a working display. That should fix it if the problem is on the board and not a missing voltage from elsewhere.
@@crashbandicoot4everr hi thanks for the reply, I did that as i have 4 of them and are all doing the same thing, new caps on the power supply i thought might have been the problem. I changed the mainboard now and now have the clock back with the display, but now no video output using all the working parts from the main machine that was all working! its a 2 steps forward then 1 back again. lol
What is the Panasonic model number for this repair video? Nothing ventured; nothing gained. Thanks ✔✔😊😊
PV-4250
they were probably making these modules with daughterboards to make machines a bit smaller. silly.
How do rate Sony vçrs then
Sony were ok. They had issues. Capstan motor bearing, seized up p6 guide, blue threading gear, power supply leaky caps. Other than that they were good solid performers.
Can surface mount caps be replaced?
I have not had success on these ceramic modules
On PCBs you can, but the delicate pads cleaning process can be very time consuming. Depending of the corrosion state you have to scrape, rub with white vinegar/IPA, sometimes redo the pad with copper foil or redo the track or via with a thin enamelled wire, etc.
For modules, if it remains simple (for example only few caps/resistors), it could be possible to recreate the module. In this case, we have the luck that resin don't cover it entirely so we can measure the painted resistors, it may be possible to design a PCB as a replacement, reusing the custom IC of course. Some arcade game boards can revive with this kind of recreated modules.
So, there are solutions, but it highly depends of what you want to do, considering the required time and soldering/designing level.
@@geraldv203 remember the encapsulated modules that Sony and Akai used. Try fixing one of those.
How dare they **** with the aristocats
Sir national vcr j1 ka no video &audio foult ka video karo
I got a old VCR so I could play my tapes for my kids like the Natural Born Killers movie my friends and I spliced crime scene photos & Marilyn Manson, Tool, Nine Inch Nails, and My Life With the Thrill Kill Kult songs into. The modern version of Natural Born Killers was ruined by editing it to be politically correct.
Its a woke woke woke world.
this political correctness is about to make me puke
what if the hifi stereo is intermittent? could be dirty heads? but the picture is fine. it depends on the tape, some tapes play with the hifi always on
The way VHS HiFi what's recorded I'm surprised it even plays back at all. Beatrice Hi-Fi uses what they called deep layer recording where the signal is recorded deep into the tape and then the video is laid down on top of it at a different angle. the overlay video signal erases approximately 70% of the audio signal that was previously recorded just before the video signal was laid down over top of it. On playback the only reason you can even detect the audio FM signals that have been over recorded by the FM lumanence signal and the double side band audio signals is due to the 36' azimuth shift between the heads and the narrow band of the audio signals with respect to the video. First two heads have to actually detect the signal and then the singles need to be filtered out from all the noise. as tapes age the weaker audio signals 10 to get lost in the mud just due to self eraser that coupled with the fact that the heads we're down on your playback machine making the recovery impossible. I have multiple VHS machines here that I use for archiving and I would estimate that 1 in 10 tapes I have to switch to mono to get clean sound as the tape has deteriorated and Hi-Fi recovery is not possible. when a customer complains about this site just say too bad so sad you waited too long your tape is shot you're lucky to get anything off of it.
👍👍😎✌️
6:25
Bruh
Gee, I wonder if they're going to edit all the films where Samuel L Jackson or Denzel Washington use the N word... Bunch of hypocrites...
I knew one moron would only focus on that part of the video.
Hi sar mobile number please reply sar my VCR service and
No part sar India Gujarat vadodra padra sar please reply
I don't think so.
You Can Use A Small Hot Air Station Or A Heat gun.