9:40 The way the solder looks shows clearly the failure. I also saw some ELNA through hole capacitors having this leaking issue on NEC Turbo DUO and some arcade game boards. Speaking about arcade game boards, I saw some people that found a way to remove the resin to repair these weird brown/black SIP packages with ceramic substrate like the one we can see at 12:20. They even designed PCBs to make replacement parts ^^
Besides JVC that has the dynamic drum technology, I've always wondered what VHS machine has the other type of technology which is piezo heads found in some pro formats decks, Now you solved that mystery for me.
JVC dynamic drum actually physically tilted the drum using a little motor and plastic gears like the nakamichi dragon. Like the dragon they all cracked and broke.
@@12voltvids Yep, I have two of those with cracked gears, there is a workaround to disable the DD system I wrote at videohelp in the capturing section.
@@12voltvids That's a shame. When it worked, it was great. But, yeah, when the gear splits... I've got an HR-S7500U sitting in the closet because its DD mechanism is broken.
I'll have to remember this! I have an S-VHS Mitsubishi and though I haven't tried the S-VHS functionality with it, I plan on it soon. I was already in there to replace belts and that sure was a chore.
@@12voltvids funny, to me mitsubishi is known as mitshitbishi when it comes to dlp tvs. their 2000s dips were *AWFUL*, but it’s good to hear not everything from them was
@@walle637 well to be fair all the DLP tvs that used the 1080p "wobulation" chip were a piece of shit. My Samsung 63 from 2005 has the missing / stuck mirror problem, yet the 2 older 720 sets still work perfect and have probably 30000 hours on them. The problem was Texas instruments made bad chips that failed.
This was an awesome repair! I wonder why JVC et al did not switch fully to SVHS in 1987. Was SVHS circuitry so much more complex than VHS? Instead, they had regular VHS, SQPB and SVHS until the end of the format.
Great video, the piezo head system came from Video2000 I believe, it's certainly present on all Philips V2000 machines (I am repairing a VR2340 as I type this) and means that even the 1970s machines can do forward and reverse picture search without any noise bars.... Oh and 8 hours on a tape in better than VHS quality from launch. Remind me why VHS won again!?
The piezoelectric head system was developed by Ampex and used on the vpr1 back in the late 70s. We had one at the TV station I interned at. Three head, erase record and play back. This VTR could do off tape monitoring while you were recording. The playhead had a piezoelectric actuator which gave it perfect variable speed playback in forward and reverse. You could even spin the reels by hand and it was perfect.
@@12voltvids - Ha! That's cool, you learn something new every day, I didn't know Ampex had developed it first, I always was under the false assumption that it was a Philips development, I guess Philips used it in domestic machines first though! Thank you for clearing my misapprehension up!
@@robustreviews the v2000 Philips was the first consumer device to use the technology but broadcast had it first. The hsu82 was the first to bring this to vhs
I have a Mitsubishi hs-423ur, SVHS model, It looks almost identical inside, the board layers are in the same order, the picture is overall very good. Every 30 secs to a minute I see a thin black line, like drop out, but when the tape is played on a different VHS player it's not there. I looked on my board and didn't see the same JVC SVHS comb filter. I wonder what this playback issue with the "dropout look" is related too....? Any idea on where to look on the board?
*Wow, found out about you on DigitalFAQ - your knowledge and experience are off the chart!* I will now pester you with my situation: Bot the U82 new for the 2/3rds speed slomo. Worked fine for years then one day, dead - would not turn on. It's been that way for "many" years and I still have it because I'm not about to toss a $2000 (!) VCR. QUESTION: what might I be facing as far as a repair? My main concern is playing back my SVHS tapes to digitize. I scored a thrift store JVC HR-S3600U SVHS-ET that I haven't tested yet and looking at a pawn shop $50 HR-S2902U that is said to work. I have purchased every used SVHS VCR I've encountered locally - a grand total of ONE so far. So a 2nd one surfacing is a big deal. Or should I approach this a different way! NOTE: I also have a new head I purchased when I had it for the "long haul" thinking worn head replacement. RE: Slip Rings: I swear mine do not look like the ones in this video. I seem to recall the diameter of the rings were brass and very small, maybe 1/8" or not much more - the wipers were thin brass "fingers" - all very delicate but very slow wipe velocity since small diameter. After seeing once, I thought should have bot replacements too. But now is probably academic.
I have an HS-U70 and I think the bad issues with it are with the board under the top board and getting that top board off is is a BEAR, mostly because of those STUPID squeeze tabs which Mitsubishi used FAR too many of to hold the board in place making those early high end SVHS decks VERY hard to service. I never was able to confidently lift the board off those stupid squeeze tabs without strait up breaking them so I never bothered and it's still sitting there with all it's issues like video input and sound throughput issues. It looks like they may have (smartly) reduced the number of squeeze tabs for the HS-UX2 series to a more manageable level, but if you ever opened an HS-U70 or HS-U80, you'll know exactly what I am talking about with their huge set of squeeze tabs essentially "gluing" that top board to the main chassis for a real chore of getting that board off.
Mitsubishi bought electrohome. At the time there was an embargo against Japanese companies entering Canada. The only way in was to buy a Canadian company that was in distress. So they bought electrohome and marketed in Canada under the electrohome brand. They had to keep the brand name for 10 years and the Mitsubishi brand rolled out in Canada after about 7 years after they entered as electrohome.
@@12voltvids Well, better a high end Mitsubishi or Electrohome Super VHS than a Panasonic Super VHS, I guess. Same basic problem, but multiplied on the Panasonic machines.
Is it possible to replace the entire board in the Panasonic with an alternative one, since they should be all the same in function? Or are there some differences between different manufacturers?
I picked up an HSU82 a few weeks ago, and it seems to be OK, except the video is too green. Same tape and cable on a u795, the color is correct. Ideas?
Hello there, I hope you can help. I have a mitsubishi HV-V6000 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?
That was a machine and a half, i wonder if it's still working. Old smd caps are no better than through hole, they still fail. A repairer called ' Radio cruncher ' has repaired many sony radios that are full of smd caps, they are always dead and leaking, but they are an old radio. We need to get away from electrolitics, but not tantalum layer caps eather. They go short for no obvious reason.
@@stevenmann9769 They were all bad. I have talked about the scandal that happened in Japan in the 80s over caps. Stolen formula, key ingredient missed, electrolytic because caustic when in discharged state and burned through the rubber plug and spilled on the board taking the board out. Huge problem that hit Panasonic, Sony and Canon mostly.
I always like it when you change a capacitor and everything works again
Your experience really shines through on these videos!
9:40 The way the solder looks shows clearly the failure. I also saw some ELNA through hole capacitors having this leaking issue on NEC Turbo DUO and some arcade game boards.
Speaking about arcade game boards, I saw some people that found a way to remove the resin to repair these weird brown/black SIP packages with ceramic substrate like the one we can see at 12:20. They even designed PCBs to make replacement parts ^^
Besides JVC that has the dynamic drum technology, I've always wondered what VHS machine has the other type of technology which is piezo heads found in some pro formats decks, Now you solved that mystery for me.
JVC dynamic drum actually physically tilted the drum using a little motor and plastic gears like the nakamichi dragon. Like the dragon they all cracked and broke.
@@12voltvids Yep, I have two of those with cracked gears, there is a workaround to disable the DD system I wrote at videohelp in the capturing section.
@@Capturing-Memories yes fixed many. We disabled every one we sold as it was as unreliable as the dragon was. Most disabled that system too.
@@12voltvids That's a shame. When it worked, it was great. But, yeah, when the gear splits...
I've got an HR-S7500U sitting in the closet because its DD mechanism is broken.
Wow your on a run getting these old VHS machines working and that one is a beauty.😎
I'll have to remember this! I have an S-VHS Mitsubishi and though I haven't tried the S-VHS functionality with it, I plan on it soon. I was already in there to replace belts and that sure was a chore.
Wow "board heavy" So much in there compared to the cheap units that followed! Nice picture! A very well built VCR.
This was one of the best built consumer VCRs ever. All those mitsubishi VCRs were.
@@12voltvids What about later mitsubishis I have one from 2002 it has over a 1000 hours on it stil working and its svhs to.
@@12voltvids We had this model in the 90s but it went bad and no one could fix it correctly for us I felt so bad getting rid of it to.
@@12voltvids funny, to me mitsubishi is known as mitshitbishi when it comes to dlp tvs. their 2000s dips were *AWFUL*, but it’s good to hear not everything from them was
@@walle637 well to be fair all the DLP tvs that used the 1080p "wobulation" chip were a piece of shit. My Samsung 63 from 2005 has the missing / stuck mirror problem, yet the 2 older 720 sets still work perfect and have probably 30000 hours on them. The problem was Texas instruments made bad chips that failed.
This was an awesome repair! I wonder why JVC et al did not switch fully to SVHS in 1987. Was SVHS circuitry so much more complex than VHS? Instead, they had regular VHS, SQPB and SVHS until the end of the format.
Great video, the piezo head system came from Video2000 I believe, it's certainly present on all Philips V2000 machines (I am repairing a VR2340 as I type this) and means that even the 1970s machines can do forward and reverse picture search without any noise bars.... Oh and 8 hours on a tape in better than VHS quality from launch.
Remind me why VHS won again!?
The piezoelectric head system was developed by Ampex and used on the vpr1 back in the late 70s. We had one at the TV station I interned at. Three head, erase record and play back. This VTR could do off tape monitoring while you were recording. The playhead had a piezoelectric actuator which gave it perfect variable speed playback in forward and reverse. You could even spin the reels by hand and it was perfect.
@@12voltvids - Ha! That's cool, you learn something new every day, I didn't know Ampex had developed it first, I always was under the false assumption that it was a Philips development, I guess Philips used it in domestic machines first though!
Thank you for clearing my misapprehension up!
@@robustreviews the v2000 Philips was the first consumer device to use the technology but broadcast had it first. The hsu82 was the first to bring this to vhs
really well explained great work
I have a Mitsubishi hs-423ur, SVHS model, It looks almost identical inside, the board layers are in the same order, the picture is overall very good. Every 30 secs to a minute I see a thin black line, like drop out, but when the tape is played on a different VHS player it's not there. I looked on my board and didn't see the same JVC SVHS comb filter. I wonder what this playback issue with the "dropout look" is related too....? Any idea on where to look on the board?
*Wow, found out about you on DigitalFAQ - your knowledge and experience are off the chart!*
I will now pester you with my situation: Bot the U82 new for the 2/3rds speed slomo. Worked fine for years then one day, dead - would not turn on. It's been that way for "many" years and I still have it because I'm not about to toss a $2000 (!) VCR. QUESTION: what might I be facing as far as a repair?
My main concern is playing back my SVHS tapes to digitize. I scored a thrift store JVC HR-S3600U SVHS-ET that I haven't tested yet and looking at a pawn shop $50 HR-S2902U that is said to work. I have purchased every used SVHS VCR I've encountered locally - a grand total of ONE so far. So a 2nd one surfacing is a big deal. Or should I approach this a different way!
NOTE: I also have a new head I purchased when I had it for the "long haul" thinking worn head replacement.
RE: Slip Rings: I swear mine do not look like the ones in this video. I seem to recall the diameter of the rings were brass and very small, maybe 1/8" or not much more - the wipers were thin brass "fingers" - all very delicate but very slow wipe velocity since small diameter. After seeing once, I thought should have bot replacements too. But now is probably academic.
Caps in the power supply leak on these Mitsubishi era machines and corrode the regulator board. Start there.
I have an HS-U70 and I think the bad issues with it are with the board under the top board and getting that top board off is is a BEAR, mostly because of those STUPID squeeze tabs which Mitsubishi used FAR too many of to hold the board in place making those early high end SVHS decks VERY hard to service. I never was able to confidently lift the board off those stupid squeeze tabs without strait up breaking them so I never bothered and it's still sitting there with all it's issues like video input and sound throughput issues. It looks like they may have (smartly) reduced the number of squeeze tabs for the HS-UX2 series to a more manageable level, but if you ever opened an HS-U70 or HS-U80, you'll know exactly what I am talking about with their huge set of squeeze tabs essentially "gluing" that top board to the main chassis for a real chore of getting that board off.
_Twin Digital_ on an Electrohome. They didn't even really bother to hide the clues that it's a rebadged Mitsubishi.
Mitsubishi bought electrohome. At the time there was an embargo against Japanese companies entering Canada. The only way in was to buy a Canadian company that was in distress. So they bought electrohome and marketed in Canada under the electrohome brand. They had to keep the brand name for 10 years and the Mitsubishi brand rolled out in Canada after about 7 years after they entered as electrohome.
@@12voltvids Well, better a high end Mitsubishi or Electrohome Super VHS than a Panasonic Super VHS, I guess. Same basic problem, but multiplied on the Panasonic machines.
Nice.. keep sharing sir.
Is this a reuploaded video? I have the impression that I saw this before. Great content 👏🏻
It's a reupload. I also have seen this video years ago.
Re-edit different version.
Do you have any experience repairing a Mits HS-U80? I need mine looked at.
Is it possible to replace the entire board in the Panasonic with an alternative one, since they should be all the same in function? Or are there some differences between different manufacturers?
Panasonic didn't use a JVC board. They made their own. Not interchangeable.
@@12voltvids Oh, I must have forgotten this, because I also watched your video with the Panasonic. Thank you for replying!
I picked up an HSU82 a few weeks ago, and it seems to be OK, except the video is too green. Same tape and cable on a u795, the color is correct. Ideas?
Good job!
Hello there, I hope you can help. I have a mitsubishi HV-V6000 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?
Shipping costs to Canada would be prohibitive plus this is a pal machine which I have never worked on.
@@12voltvids It is a NTSC VCR from Japan.
Shipping would probably be 300 each way. I'm just guessing but if shipping to the US is 150 going across the big pond is probably double at yeast.
Great save.
Interesting video, thanks !
That was a machine and a half, i wonder if it's still working.
Old smd caps are no better than through hole, they still fail.
A repairer called ' Radio cruncher ' has repaired many sony radios that are full of smd caps, they are always dead and leaking, but they are an old radio.
We need to get away from electrolitics, but not tantalum layer caps eather.
They go short for no obvious reason.
It might be still working. Haven't run it in years. Back in storage.
Nice one! :-))
Good video, thanks!
Why are those SMD caps such crap?
In the early days they had big time quality problem.
@@12voltvids A lot of late 80's electronics that use those caps seem to have issues.
@@stevenmann9769 They were all bad. I have talked about the scandal that happened in Japan in the 80s over caps. Stolen formula, key ingredient missed, electrolytic because caustic when in discharged state and burned through the rubber plug and spilled on the board taking the board out. Huge problem that hit Panasonic, Sony and Canon mostly.
@@12voltvids It's the board destroying way they fail that is so damn irritating... Give me good old fashioned electrolytics any day of the week.
@@stevenmann9769 I hear you.
super !!!!!!!!!!!!
👍🇵🇱👍😏