Sanyo WVM-650 VHS VCR - Eats Tapes?? Couldn't duplicate, Customer says "Service Mode Select Switch"
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- เผยแพร่เมื่อ 1 ส.ค. 2024
- A nice little Sanyo VWM-650 VCR came in with the complaint of eats tapes (sometimes). I must have put several tapes in and out at least 100 times and could not duplicate the issue. I asked if the customer just wanted it back for a 1/2 hour diagnostic. I did give him the option to service the mode select switch for 2 hours labor, he did approve the service. (It came in with a note about the mode select switch FYI)
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00:00 Intro and a look around
02:35 Disassembly
05:24 The mechanism is out
06:16 There is the mode select switch
06:38 Removing the mode select switch
08:23 Mode select switch is out
09:25 The acetone test (FAIL)
09:55 Servicing the mode select switch
12:06 Reinstalling the mode select switch and timing the mechanism
14:52 Acetone belt service
15:33 Mechanism reassembly
17:33 After reassembly tests
17:56 Tape path cleaning
20:56 My bad again
21:35 Playback tests with video
22:41 Final thoughts/closing words
24:05 Bloopers - วิทยาศาสตร์และเทคโนโลยี
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Have exact same unit. Was eating tapes immediately when tape installed, and auto ejected. Thx to your video I performed this procedure. When I took the switch a part, it was a little grooved with grime, so I cleaned it with alcohol very well and deoxit. However, also found the little pads plate…one of the 2 microscopic plastic studs had broke loose. Put tiny drops of JB clear instant epoxy and hair dryer dried for an hour. Reassembled and now doesn’t eat tapes. Have yet to plug in cable to see if I have video/audio. This job is not for the faint of heart. You can melt your circuit board if not careful. I have plenty of experience. Also, I simply used desolder wick and all was fine…and magnifying glasses. 😊
Great video I like working on VCR players myself I injoy your video
The best part of this repair was removing the potentially disintegrating head cleaner arm and foam(?) cleaning element. Good move to ensure sticky foam gel doesn't collect on the heads.
If it is present, the auto head cleaner assembly should be removed completely whenever these machines are serviced by a professional technician. What happens is that the pad goes hard and dirty over time, which can damage the heads/score the drum, making it rough and expensive to repair. From past experience I've found these "head cleaners" are not only unnecessary, but also totally useless and they do more harm than good so I would take them out.
Although I may never watch a movie on a VCR again, it is nice that this VCR has been given a longer life.
Over the many years I have seen circuit boards in consumer goods that have empty holes and silk screening for lots and lots of components that are not there. I've always wondered why no parts. The circuit board in this unit is the same way.
They have no components because that model didn't come equipped with the bells and whistles of the next higher end models that they also make.
Example, some may have the same board across many models , however the lowest grade model may not have a tuner in it. Just plays tapes and can't record. That model will be missing a lot on the board, and the tape deck.
It is the same with most new cars. It doesn't have the component for power seats, but the body control module and the wiring is usually still in the car.
@@NY411Info Makes sense. I've also heard that the engineers put all of the parts they knew the design needed and the "tech" staff removed anything not 100% necessary to improve the profit margin.
@@NY411Info For VCRs in addition to feature levels, they often used the same PCB in different regions in later models so some of the empty spots on the one in the video may be for e.g different power supply for 220V or multi-voltage, different TV system, different broadcast audio system decoder board etc.
Also where to buy belts? I have this same Sanyo vcr but it's a 4 head mono audio unit!
Sony SLV-N55. As I was cleaning the heads, "somehow" I broke a piece that has a tape guide attached to a white plastic "flag". Somehow, it sits down in a hole and you rotate it to lock it in place (I think). I just bought three other same model VCR's for parts and just cannot figure out how to pull that tape guide piece out without breaking off that delicate locking tab. Do I have to go underneath the chassis and remove that big pulley that has the rubber belt on it? If so, how do I remove THAT pulley, too. I'm so used to being able to buy repair manuals for any car or truck I've ever owned but Sony just doesn't sell them for their products. Even their repair manual doesn't have a good picture of it. I think it is the Guide Cassette Door & Hook which is right next to the Lever Unit Pinch Assembly. Who the hell made up those names? So, any ideas on how to get that Guide Cassette Door & Hook Assy out?
I highly recommend you use "CRC QD Electronic Cleaner" to clean mode switches. I've used it on many VCR mode switches and it works very well. You should give it a try. :)
Question. If he has been doing the cleaning and lubing on these units for 40ish. years this way, and not damaged anything. Why would he change his technique?
It's potato/ Patato. Same results either way.
When I was a kid I used Vaseline or WD40 or sometimes both in the volume pots
of my old boom boxes to stop the static. Was it the right way ? Nope, but it worked for me for a few months and I would do the same thing in 3 months.
It's not rocket science.
Re-Phrase...The new junk is rocket science...lol.
@@NY411Info Well it's just because he did say that acetone will damage some mode switches, that is why I use the cleaner i use. It will not damage anything.
@@TheVCRKing Ahh, got it. Wasn't sure what your thinking was.
I would not use it myself on a mode select switch, but I may use it on a switch that is hard to access like a record play switch. Do you think it is batter than Deoxit D5?
@@norcal715 Deoxit would work just as good but it's just pretty expensive.
I have the same issue with my VCR devouring my tapes. However, I completely forgot to make marks with a permanent marker on the mode switch, before removing it... My bad. Now, not knowing where it was aligned, the VCR has standby on, ejecting and loading issues. All other buttons are not working either... Damn 😮
What brand is it and what is the model? I may have a service manual that shows alignment instructions.
@@norcal715 Sir, it is a Panasonic NV-SD3. I must just add, that this mode switch, looks a bit different from ones I have seen on here and does not simply pop off by pushing the four tabs through and exposing the contacts. This mode switch has a small plastic cog (teeth), that seems molded together in one whole thing. It clips onto four contacts on the board. I cleaned all of these contacts on the board and the switch. However, I noted a small notch (indentation) on this cog. The top of the mode switch rotates (duh), but I see an arrow indentation, as well as two indentations on the plastic housing, facing at 12 and 2 (reading it like a clock) respectively at the point where it is unscrewed from the chassis. I hope that the information I have given you, will help you to be able to help me. This VCR is virtually in a pristine condition and it would be a great pity, if I cannot get it working before. Thank you very much.
@@norcal715 *UPDATE* Sir, I appear to have sorted out the issue with the mode switch and the VCR is responding 100% ! I noted indentation dots on the switch itself and on the bigger cog/s. I lined these dots up and success... Everything is working perfectly ! 👍
Have you encountered many machines with squeaky & or noisy head drum bearings? I have two JVC SHVS-ET machines that developed a slight squeak (the noise matches the rpm of the drum), & now one of them makes quite a bit of noise- similar to a pc hard drive with a lot of hours on it. Issues are intermittent on both. The one that has worsened is used almost daily. Would a bearing replacement be possible if rec/playback starts to degrade? I've looked around the net & found next to nothing on the subject with the exception of one or two machines from the late 80's. Thanks :)
I have, for some unknown more than I remember a few JVC's. in some of those units, the bearings can be removed and replaced in the cylinder unit.
On one I've used (Philips branded but shared internals with a similar JVC SVHS) some squeak I got seemed to at least in part originate from the carbon brush rather than the drum itself, though I wasn't able to eliminate it entirely. (sits in a hole in the brass nut under the drum motor, have to be very careful not to lose the brush/spring when taking the motor off)
@@mikec9112 I have a 1990 fisher/sanyo where the head drum had seized completely, but worked fine after just manually getting it going. Might just be the bearing oil settling from non-use or something
Can be worse though, a Samsung SV-7000W we had where I used to work had some sort of damage to the contact portion of the upper or lower drum (can't remember) which causes it to sound grindy.
The very late model JVC SVHS (and non-SVHS decks), with the last mechanism that has no loading belt were very cost-reduced, never had mech issues with em, but all the ones I've used of them have some annoying interference on the linear audio output that makes linear audio output kinda useless.
Never understood why people have such a downer on Sanyo gear (12voltvids in particular seems to detest them). I always found them to be reliable, long-lived and good value for money. A bit dull and plasticky, perhaps, but at the price I wasn't complaining.
In the mid-late 90s, and early 2000s they were quite a nice product.
@@norcal715 I tend to agree on this one. Sanyo VCR's from experience were somewhat easier to troubleshoot and service in the workshop back then compared to some over-designed / "high-end" models of other brands (with extra "luxury" features that often caused problems by themselves). My opinion: 'less is more' - I've never had a single problem with any Sanyo product (regardless of price) outside its normal service life. Generally reliable. 😉
Yeah these VCRs last a long life my uncle had one and he wore out the heads!