That robotic sound ... Specially woith older mechanisms which in STOP mode had the tape inside the cassete and when pressing PLAY the whole system had to pull tape around drum. Later thet only kept tape milimetrical from drum.

That´s a 1992 mechanism. From 1995 on, they used FUNAI´s-

Not all modern VCRs from 96-2016 used Funai mechanisms.

Yeah! Shintom used another mechanism. But they're good.

12voltvids hey my name is Ryan I have a Sony slv-679Hf and I having problems I keep on getting error code when I'm trying to rewind the tape and the error code is 41105 so can you please help me you can contact me by email my email address is ryancofre32@gmail.com

There are 2 optical reel sensors on the circuit board under the reel tables.If you look @ 30:45 you will see them. One is under my thumb and the other one just above it. These measure the reel rotation so the machine knows the tape position especially during rewind so it can slow down as the tape gets to closer to the end. These are a fairly common failure.W will probably di a video showing that failure at some point in the not too distant future when I do another series on VCRs.

The metal parts fusing together is exactly what happened in my old Sony 3/4 playback machine. I had to rip that unit apart and lube all the parts.

KneeBittenNymphs Could be the capstan motor.Many of those sony machines, the capstan motor bushing would bend from the pinch roller pressure and cause the rotor to drag slightly on the stator. This causes the drive IC to overheat and then ou get the speed fluctuation and eventually it stalls out.

12voltvids Wow, that was fast. Thanks for the advice. I'll look into it as soon as I get a chance to open up the VCR again.

More VCR videos to come this fall. I have a bunch I need to go through

I believe there is a video for the tower gear but i will make one just for you. Stay tuned. I will make a short one specifically for the gears on the top of the chassis.

Thank you I will greatly appreciate it along with a bunch of others. Thanks again.

+totalrandomtechnolog I am sure I have the gears you are looking for. I have several of those decks that have the broken blue load gear, and the rest of them are OK.

Yes I do. paypal.me/12voltvids patreon.com/12voltvids

Volker King Small white or black dropouts is usually the head grounding contact is not making a good connection and allowing static charges to be picked up by the drum. This comes, of course from the heads flying around, and running an insulator, in this case plastic (the tape) This is why some tape manufactures like 3M but that black back coating on their tapes. That was to dissipate static charges.The head grounding contact will be either on the top sine, or on t he bottom side of the drum, and is typically a copper strip, with a carbon ground rod making contact with the drum motor shaft.

I am going to take a broken one down to a local shop with a 3D scanner/printer and see if they can make one for me. If it works out, I will be able to fix a few of my broken Sony units.I will keep everyone posted to the 3D printed gear once I get it done. There will be a video done of it.

+Jack Bauer Who's John?

Its nothing my mistake , i thought your name was John , i watched you for the first time

+Jack Bauer Ha ha, well I get called worse... by my kids.

Check the capstan bearing housing. They bend and allow the rotor of the capstan motor to run the stator coil. If the top of the bearing is copper colored then it is the old type that bends. If it is silver it is the newer style but they still eventually bend and need to be straightened.

@@12voltvids Thank you! I'll take a look

I just grabbed that one as I figured that youtube wouldn't complain about copyright if the image was shown on the TV. I got popped last year for a copyright violation because a 10 second shot of the screen was in the shot, and that really pissed me off, as there was no intend to violate, I was repairing a TV, and had an antenna on it when I was testing, and the fox show just happened to be on the air at the time. About 10 seconds showed, and I was blocked world wide and got a copyright strike. I re-edited it, blurred the screen and sent a nasty message to youtube about it. (see the panasonic TV flickering screen repair and you will see what I mean)

drcoolit Yes that sounds like the encoder switch. Could also be dried grease on the pinch arm assembly, or possibly a broken plastic piece of the pinch roller that broke when grease dried out and jammed it from moving up and out of the way during an eject cycle.The hex key is I believe 1.5mm or 2mm.

12voltvids First, thank you for such a prompt reply. I have found your videos on VCR repair to be superb and I applaud your efforts and work. For some reason, despite all my attempts to get this SVL-676UC to return to a working condition (strangely it was working but had the broken blue gear when it came in but otherwise all the controls, etc. worked - now NOTHING works - it loads the tape but then it just either sits there or tries to retract the tape but doesn't do that entirely and then just shuts off - and this is AFTER I cleaned the encoder switch (but the performance was the same before I cleaned the switch)). I keep wondering if there is something ELSE that needs to be done after removing the circuit board to gain access to the blue gear to "reset" something but for the life of me, this has me puzzled. The transport is otherwise exactly the same as the 555, 315, and some other models (595, maybe others). This HAS to be something electronic. Also, for some reason, the slide is now shifted out of alignment and it won't move -- it meshes w/ a red gear (maybe others) but I can't find a way to turn a gear and get the slide to re-align w/ the holes in the plate. I have two of these 676 models but one has a shot (frozen) capstan motor. Can the motor be replaced w/o having specialized equipment to realign the A/C head? (I know that exact positioning that head is a critical assembly point) Thank you again for your reply and maybe some day if you get your hands on the 676 you may be able to do a video on that too since maybe there are some points re that machine that are unique and could help others. I think it's a great machine -- if only I could get it to work! Kind regards -- Phil

drcoolit Sounds like a mechanical alignment issue to me. You will have to pull it apart and line up all the timing holes, and have all the levers in the correct position so they will drop into the cam ear groove.

How I can contact Dave for a problem similar to yours

JR I'm not sure . I was hoping he would reply . I hate bothering him too much . I know it's hard to tell when you're not actually looking at it . I really was careful and made sure all the plugs were in correctly . No it doesn't load the cassette in at all . Evidently the loading motor isn't coming on . The wire from it goes to the circuit board near the encoder cam. I haven't gone any further yet. If I figure it out I'll let you know . 😆⏰

+Fred Chew Sure. Will do one to show Re - Re bearing.

If it is only when playing SVHS tapes then look to the comb filter, it is it on both VHS and SVHS I would look at the power supply

Thanks for the reply, a few caps in the PSU did the trick.

Yes turn it off.

@@12voltvids Thank You. I find your videos very interesting. Im in Plymouth UK. Merry Christmas

@@12voltvids have you got any tips on a dim display on a Sony SLV 715 Vidro recorder. I have exchanged the complete filament from a doner unit which is better but could be better. Do you put a small AC voltage across the filiment terminals to burn off bad deposits or is there a capacitor which needs changing on that detachable board as there is 3 under the display itself

@@johnny1408 if the supply viktage us correct and the display is dim then it's the display tube. No you can't burn anyyhing off the filaments. There is nothing to burn. Burning requires oxygen and the tube is under vacuum. Most likely the vacuum is slowly failing and when gas gets in the tube stops working.

@@12voltvids Hi agian I have finally got my Sony SLV 815 working and plays pre recorded tapes with very good hifi stero sound and the picture ive managed to get very good without a scope, but the problem i have now and its only a small problem i hooked it up to my tv but i only get stereo hifi sound in LP mode when i record and when i record in SP i get perfect sound but,,, not in stereo although picture is perfect on SP and LP

Scope the output of the AC head amplifier. Just follow the wires from the AC head and see where they plug into the board. There is usually a test point around there to give you the output of the ctrl head.

I checked on my scope and compared it to my working unit. My working unit has a nice steady pulse to low that goes with the head switching signal, while the broken one has absolutely nothing, it's stuck on high.... Going to trace that signal and see where it comes from. Thank you.

12voltvids Found a faulty cap in the control head amp. All good again! Thank you :)

Robert Mattison definitely not. use the correct lithium grease.

From what I understand, he's just using a pre-recorded tape so any official movie you can buy on VHS will work.

I downloaded it off youtube.

No

Yes it is 31 years old now. I bought it is 1984 when I first entered the electronics repair business. Paid 1500.00 for it, and it still works as well as it did when new. Comes in handy for some repairs.

Where did you get that? Sony has been making VCRs since the early 70s. They invented the VCR. It was the u-mstic 3/4". Sony has been making half inch video recorders since 1965 I have one it's real to real. Their first consumer VCR was introduced in I think it was 1975 it was a betamax. They were also one of the three companies working to develop VHS along with JVC and Matsushita. It actually when Sony was working with the other two on a home video format the early designs were cast off as not good enough by Sony standards and Sony thought everyone was on board with beta when they launched it and then JVC stuck a knife in their back and launched VHS which was one of the formats that Sony had worked on with them and had been cast off early as being inferior as far as picture quality went. Sony changed the VHS in the late 80s when they finally admit that beta was dead.

@@12voltvids ok, now i understand. they ware no making vhs but betamax instead.

@@buretehudesi yes correct Sony made only betamax until they released the slv555. They tried hard with beta I did have a better picture the VHS and it did have at one point over 40% market share here in Canada but in the end there were a few factors that killed beta one was video stores not stocking movies in beta format that was the biggest nail in the coffin was video stores only stocking VHS. In areas where independent stores carried both beta and VHS beta recorders did quite well but in areas that video chains set up and only stocked VHS that was a death sentence for beta. Beta did however become the de facto broadcast standard and all the TV stations we're using the professional beta not the professional VHS and the pro market is where Sony made their money where they could sell a VCR for $30,000 or more and a camera for 40 Grand or more so beta did make Sony tons of money the consumer version was there for the purest that wanted the best at home recording picture quality but in the end VHS won out. People wanted long recording times and just didn't care about the picture quality which is too bad because beta did have a better picture it always did and had it not being bad marketing initially by Sony they could have stopped VHS dead in his tracks.

A 1730 with a noisy drum. Bearing failure is the problem. You cab open that top and remove an e clip which will allow you to lift the entire cylinder off to reveal a big rotor magnet and stationary stator coils on the bottom. You can oil the bearing shaft and it will work for awhile. I did this with thus one when I first got it but it eventually seized up and I had to bite the bullet and change it.