JVC HRD180U No Power. Can this one be fixed?

[@beckywine1924]

Thank you for taking time to identify and explain the function of the various components and there location. I wish I was your next door nab and could hang out and learn. you are a good teacher.

[@cellarseer]

It blows my mind that you were able to remove that regulator using desoldering braid in one-fell swoop and not tear pads off. Kudos.

[@mdftrasher]

Thank you sir, very inspiring. I have done 5 (very cheap) recorders last week. All had some kind of a problem.

[@dadbabyletsplayz5132]

When the video started and you took out the machine I could tell it was one of those 80s machines that had some heft to it, and that it was well built.

[@12voltvids]

Not really that well built.

[@andynoon2584]

Great repair. My first VCR was a JVC top loading machine, probably the best VCR I ever had.

[@12voltvids]

I forgot about this one.

[@christal2053]

​@@12voltvidsdo you still do vcr repairs ?

[@12voltvids]

@@christal2053 yes from time to time.

[@rectify2003]

I'm so glad you took the STK apart. I have replaced so many in the past.

[@GadgetUK164]

Wow, in all the years I worked in the trade I never thought once about taking one of those STK votage regulators to bits - thanks for showing that, It's fascinating! Also makes me wonder how many might be repairable with a bit of tinkering. Old Amstrad monitors used to have similar regulators in them which died all the time from overheating.

[@12voltvids]

Sony used to use a 3 channel power amp IC for the convergence IC in their old CRT projector TVs. Heat was a major issue in those sets.

[@Ramdileo_sys]

@@12voltvids at 29:35 .. so basically this can be replaced by 4 modern LM350??.. set to the proper voltage??

[@12voltvids]

@@Ramdileo_sys need power control though as it is controlled by system control to shut down when in standby.

[@DK640OBrianYT]

It's a 1986/87 vintage machine and the difference down to the HR-D170 is the LP-ability. I don't know if this JVC chassis and mechanism was the last casted (all-metal) good solid one. The idler tire, capstan pinch roller and more or less the entire mechanism is also used in the very first generation of JVC S-VHS machines (HR-S5000, 7000, 8000, 5500). However these S-VHS machines seems more populated. Double rollers on the left side of the video head drum for instance. The motors seems different also. One downfall is the problem with loose guides, but it can be fixed. There seems to be no division of JVC mechanisms like at Panasonic where you have G, Z etc. Does this excellent JVC mech has a name ?

[@dadbabyletsplayz5132]

I never liked how on newer machines is that the tape stayed wrapped around head while it FF and RW. I am no expert but is it not better for the lifespan of the tape if the tape would retract back to the shell before FF and RW?

[@mdchala]

the best part is when popped that regulator open, thank you for that.

[@joveaaron-real]

I had the same problem, but with a Samsung Diamond Head VCR. I want to repair it because it was a thing from my childhood. But the fuse was blown. I ordered some new ones and install them in the VCR, absolutely nothing. I don't know what to do now: I've replaced the fuse, I checked if the cable was bad... Same, I don't know what to do now.

[@Ramdileo_sys]

at 29:35 .. so basically this can be replaced by 4 modern LM350??.. set to the proper voltage?

[@gustavoangelero4068]

Yes, when there wasn´t no replacement IC available, I used to add a power regulator to supply the lost voltaje.

[@infinitecanadian]

If those are transistors, why do they have but 2 legs?

[@kermone87]

I have back massagers that won't turn on. It's brand new but sitting in the box for a long time. Can I send a couple to you to see if you can fix them and post a video of what the problem was? You can keep them after they are repaired and I can mail it to you for free if you live in USA. Please let me know.

[@sergiopr]

Hi, your videos are great, I'm watching a lot of them as I'm trying to locate a fault in my JVC HR-D150U, which automatically starts spinning the REW wheel (left) and the drum when I turn it on. If you have any advice that I could review, it will be welcome, otherwise I keep watching your videos that are really fascinating. Greetings from Argentina! :)

[@ignorethisaccount69]

I found one of these in a storage room in the basement, my brother broke a VCR but luckily I got to that one before he did, it is picky about tapes but works pretty well on certain tapes, at first it didn't work so I opened it and the fuses were blown, there was no signs of failure or bad components so I replaced the 2 blown fuses and it worked just fine, the fuses were blown for no reason, and I use that VCR with my flat screen tv, it actually looks pretty good despite being on VHS tape.

[@stevereid3451]

I recently acquired a JVC Hr-D180U and it powers off after a tape is loaded. I can power it up again and tape will load, drum will spin with tape around drum and even ff and rew but tape will not play. Will not move. Any ideas? Thanks

[@supermasterPIK]

This machine was fromn the last years quality was rpesent (at leat on JVC). After 94 or 95 cheap chinese chassis (Funai) took the market.

[@rsattahip]

Interesting fix, thank you

[@the98rg84]

I have a JVC VCR very similar to this one. It's a little more complex, has a few more boards. I suppose it's older than the model you're showing here. It has no power, but I get a clock display. STK has UNSW 12 V. I was told to ground pin 5 of the STK with a 1 K resistor. The power LED goes on when doing that, I get SWD 5V and SWD 12 V, but the display acts as if the unit is off, showing a blinking clock. Do you think the STK could be the problem, or there is a problem with a CPU IC?

[@georgeowens5253]

Light flashing on DVD recorder. Fuse is okay. Can't get it started to work! Won't start .620 KU TOSHIBA .

[@pankajd701]

Sir can u tell me how much current is supplied by the power supply to the circuit board in jvc vcr model no. Hr-j507ms through different 9 wires

[@andrea44018]

BUONGIORNO IO POSSEGGO UN PHONOLA 44SB9 TOP DI GAMMA .. NON SI VEDE PIU' E STATO RIPARATO MOLTISSIME VOLTE SENZA RISULTATO PER UN INTEGRATO NON PIU' TROVABILE ..LEI SAPRA' RIPARARLO ?

[@charlesw318]

would you be interested in fixing a chassis ctc203cy GE TV 1999 with the new parts

[@speedyboishan87]

Hi i have a 1980's Panasonic VCR which does not powerup, not sure why there is no power, it has an editing facility, only 1 scart. Not sure why no power.

[@markmarkofkane8167]

I had confidence you could fix it.

[@wildcountryboyatlarge3829]

Hello i am looking for someone to fix my sharp vcr an could you repair the one i have or if you know of someone who could repair it? The power want start also. Thanks

[@DrCassette]

Interesting, I have never seen these voltage regulators before.

[@12voltvids]

All the old units that used linear power supplies used them. All of the old Betamax units used them, as did most of the early VHS machines. The old Hitachi, and RCA units used them too. Panasonic was one of the early manufactures that started using inverter supplies probably because they were cheaper and more energy efficient.

[@DrCassette]

I do know the 78xx type linear regulators, but I've never seen regulators integrated into an STK type package. I don't have a lot of experience with VCRs though, so that may be the reason.

[@kajamalanuruthiralingam5643]

whats closer to molykote pg-641

[@mrmagnetoscope]

I just got a Zenith VCR with the same mechanism. The drum and the idler and capstan motors don't turn, but the loading mechanism works. Can you please help? Thanks.

[@crashbandicoot4everr]

It's likely that STK module failed.

[@mrmagnetoscope]

Fivos Sakellis That's what I was thinking.

[@meredithmuller5543]

Hi friend, I have this exact machine and a very similar problem. There is no power button light (but the clock does blink). When I press play or fwr or rwd several of the motors begin but cant get the tape playing or rewinding or fastforwarding. The head drum doesn't spin. I wonder if you could let me in on where you found the pin diagram for this regulator and/or do you want another vcr to fix?

[@the98rg84]

You can find the diagram of the STK searching online. Google images has you cover on that one.

[@shaunrichards744]

Awesome VHS Machine.

[@zx8401ztv]

Sorry im catching up on your early repairs, i dont expect a reply. . i bypassed a similar regulator in a ferguson videostar, no 12 volts!!, i did it with a 3 pin regulator and a small relay that was driven by two transistors from the power led, yes its nasty but it worked a treat, the owner was a frend that had no money, a new regulator chip would have cost £45 at the time ;-( The videostar was a loverly machine.

[@12voltvids]

+zx8401ztv I still monitor the old videos, as I get notification to all new comments.I considered doing this, but the part was available, and the owner of it wanted it done, so they provided the part, and then abandoned the machine once it was fixed!

[@zx8401ztv]

+12voltvids But you did a spot on repair, what an odd owner :-/ "There is nothing stranger than folk"

[@12voltvids]

+zx8401ztv He actually contacted me in December and said he was mailing the payment for repair, and return freight. This is the second time he made that claim. The unit is all boxed up ready to go.

[@zx8401ztv]

+12voltvids What a strange bloke, i used to repair c.b radios for most of the truckers in the uk, and they allways came back for there radio. I did get two people that just ignored the fact i had compleated the radio, they didnt come back, so after a year i claimed the radios, i had spent money on chips and other parts, it was part mine. Treat that vcr as yours, i would.

[@12voltvids]

+zx8401ztv He offered to sell me the part he bought. I don't need a mono VCR. If it was a hifi, for sure I could use it. SO it sits all packed up.I did that to another TV that was abandoned. One of the ones I fixed on the channel, I think it was the Digistar 46". Guy abandoned it, sat in my garage for 10 months. His phone was out of service on repeated attempts to contact, so I sold it. About 4 months later I ran into him, and he asked for the TV back. I told him I tried to contact him and his cell was out, and he gave me the sob story that his prepaid minutes had run out, and he was short on cash to buy more, and he lost his job and yada yada yada...So I told him my garage had been broken into, and it was stolen. Guy that got it thinks he scored the best deal of his life for 50 bucks.

[@supermasterPIK]

here I can´t get audio, but main problem is ... You store the equipment for months or years and humidity on air causes oxidize of power supply welding? May it happen to aan equipment I got.

[@12voltvids]

That's why I store my equipment in a heated facility, so that humidity is not an issue. I store the equipment down at the end of the room with the baseboard heater too, so when it gets cold and the heat comes on the equipment gets the nice worm air first as it heats the room up. I never let the temperature get down below 7' in winter.

[@vileCR999]

LOL! Blackberry Playbook-Powered Aquarium!

[@12voltvids]

That video now plays on a raspberry Pi

[@bryceoslie4568]

U ever work on a hr-c3 compact video cassette recorder?

[@12voltvids]

No

[@MajorCadence]

I actually just found one yesterday and am about to take a look at it. Gave it the external 12V. Power light always stays on, nothing works. Probably a similar fault to this one.

[@EricKotter]

Quick question. What suppliers do you order your parts from?

[@12voltvids]

I order from KP components. I also get small parts from Lee's and RP Electronics as they have store fronts but not convenient these days do the Covid. Yesterday I went down to buy a soldering iron tip I waited 40 minutes in line to get in the store to make it 2 minute purchase was not happy.

[@EricKotter]

@@12voltvids Thanks for the info! I'll have to take a look at those. Wow, that's frustrating to have to wait that long. I have a JVC SR-V101US that I use to transfer VHS to digital. It will not rewind or fast forward in fast mode. I tore it apart and found out that a small torsion spring was missing that is supposed to help push a plate up to engage the clutch into a higher gear, thus not allowing it to fast forward or rewind in fast mode. I've looked at two different online stores, ued.com and partstore.encompass.com, but they don't supply the part anymore. I think I might have to resort to buying used "for parts" VCRs that have compatible parts in them.

[@12voltvids]

@@EricKotter Only common parts are available these days.

[@eddyapple4202]

what do you use to clean the flux off boards?

[@12voltvids]

Isopropanol Alcohol

[@segasonic9117]

I was thinking of buying one of the high end Victor SVHS decks from Japan. Most are "junk" and listed as having no power. Is the part you replaced typical across all of JVC/Victor's decks? The junk systems are cheap, shippi g is not... Don't want to waste money if it is something not easily fixed.

[@12voltvids]

Many of these units the parts are cheap and easily available. Shitting of this unit cost more than it was worth to repair.

[@speedyboishan87]

12voltvids Does your cameraman get paid for recording your video's or does he do it for free....

[@12voltvids]

What cameraman? There is nobody else working on these videos but me. Camera stuck on sticks over my shoulder or on the bench. This is not a high budget production.

[@speedyboishan87]

12voltvids Allright i see thats very good your use of video cameras is good you seem to have great knowledge in what you do...have you tried repairing video camcorders e.g hi 8, digital 8, mini dv etc..

[@12voltvids]

There are videos on the channel repairing the vidwfinder on a hi-8, and repairing the video circuit. There is also a 3 part series on overhauling a DCR-TRV110. Doing a full chassis swap in the B mechanism. I haven't done any MiniDV videos as I don't have any miniDV cameras that need service. Actually that's not true, my old professional MiniDV needs a transport service. Future video.When I was in the business I did service cameras. Lots of them. I have done a few videos on them, and will be doing some more, as I do have a few camcorders here for future projects.I did work in a very busy repair shop back in the 80's and 90's. I was the master certified electronics tech, and had a few junior guys working under me, but I got all the tough stuff to fix.

[@geojor]

thanks for sharing...

[@Eeropolvasti]

Could I mail you a power board from Sony S-Master 5.1 full digital amplifier, model HCD-C990, serial #8307460. Bought this unit "cheap" with nice Sub + 5 great speakers. unit stopped to work after hurricane time/ power surge.I bought it not working.... Power does not turn on, tried everything, just blinking red standby light goes on. not even the fan in rear turns on?? I was told it might be power supply board, could I take it out , 4 screws and 3 plugs=), and send it to you?? You then give me estimate, could be just simple thing?? and we go from there!?? Thanks

[@12voltvids]

I have no way to test a power supply without the rest of the unit, so no you can't mail it to me.

[@Eeropolvasti]

OK, tell me where can I order power board, for good price?? Thanks

[@12voltvids]

I wouldn't know as I have never ordered one. I am not in the business of repairing equipment for a living these days. I have long time customers from my days in service that bring me stuff, and the rest of it is my own collection. Most of the parts vendors have closed their doors. I look on Ebay, but you take your chances with that.

[@volkerschmidt5190]

Silly idea of mine: Manny people give thir VCR to repair but have no idea,what is broken,what the technican is doing to fix it. Manny people might be interested to watch and learn about their loved VCR. So just fixing it and putting the video f.e. on youtube is a great additionel service most other "repair guys wont offer. Besides the interest of the customer in the technics under the chasis of their device they know exactly what they are paying for. f.e. Besides this it is oviously a perfect advertisment. This might be a great buiseness model in my humble opinion though I know you are just doing it as a "hobby" nowadays.

[@THEtechknight]

STK strikes again. Man those things were unreliable. They really turned to shit towards the end of the RPTV era.

[@jdrs4214]

Preventative maintenance is key here. You have to maintain those by cleaning them up, cleaning the heads, checking the small rubber belts for cracking, and re-applying that thermal paste on those large heat generating ICs every 2 years or so, that crap dries up, loses its heat transferring magic, IC then overheats, and boom, it burns itself out. Now, your VCR has become a useless brick. Of course JVC, Sony, Emerson, and Sanyo would never give you that information.

[@THEtechknight]

@@jdrs4214 That might be true, but no consumer ever does that. Chips need to be designed to be a little bit more resilient to heat transfer. most ICs are. except the STK line. Ive had some last up until today, and ive had a bunch that didnt. for example, the STR regulator in my Magnavox TV is original to the TV, from 1994. I havent done a thing to it and it still works fine. its my daily driver. Only thing it needed was a B Boost cap in its life.