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Re: TEAC MV-77 VCR
The service manual should have a procedure for aligning the gearing,
BUT a lot of times they don't. Almost always, you can figure it
out as they put little tiny arrows or marks molded into the gears
showing which teeth line up. This usually is done in in the eject
If you succeed here, you can regard yourself as "mechanically inclined".
Hope Ya Fix It.
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There is somewhere some damage to the mechanism. It could be the carriage itself (the holds the tape) that has a fault on it, or something else in the transport mechanism of the tape. This could have sent the system out of position for the correct loading of a tape.
The mechanism of a VCR is very complex. The incorrect removal of a tape will not only have caused the tape arms to be out of sequence, but also caused the electronics to be confused. Inside the VCR is a device called the Mode Switch. This tells the electronics which position the VCR is in. This Switch rotates with every movement of the VCR. When parts of the VCR mechanism are moved out of sequence to the rest, the mode switch will be in the wrong position. So the VCR electronics might think it's in the eject mode when parts of the mechanism are still in play mode.
If the mechanism was working normally the arms would have been retracted as soon as the VCR was powered up. So it's now out of sequence. Pushing a tape into the holder might cause the mechanism to reset, but I suspect that what will happen is that the VCR will either show a fault code or just power off. It does that to prevent the motors causing any damage when it gets stuck.
The only way to solve this problem is to have the mechanism set up in the correct way. This can only be done if you have performed the operation on several VCR's of the same type or have the service manual. The reason you need the manual is because it tells you how the different cogs, wheels and the mode switch need to be positioned. They often have holes are marks on them to aid in the set up. To make matters worse VCR's are rarely set up in the eject mode. Without knowledge of how to set up the video or the manual you will never get it to work properly.
One further thing you will need to check that the removal didn't damage any plastic parts. Plus clean the tape head and any surface that the tape touches.
It is possible that the mechanism is out of mode as the front cassette loading mechanism and the tape forward loading mechanism have gone out of sync. Now it is important that the MODE of the system control is in the correct parking.
Hence I feel that the VCR must be opened and the mechanism reset-ted. Make sure that the tape loading has come back to the correct parking and also the cassette loading has returned, other wise remove the mechanism and reset.
the heads in the vcr are shot.....the heads which allow the tape to move forward or backward have gears attached to the bottom of them...sounds like the gears or cog wheels have damaged teeth which would cause the vcr to lock up...replace the gears and it will work..of course, its less expensive to buy a newer model.......my opinion....
This needs a little bit of care but essentially you will need to unplug the power from the VCR then do the following: Remove the top cover Then with the front of the VCR facing you look to see if any of the tape is wound around a large metallic silver drum, that is tilted upward and is not flat, at the rear of the tape casing. If so then it means that it has wound around the drum and you will need to retrieve the tape to allow the eject mechanism to work. Do not touch the shiny polished part of the drum. To get the tape in usually means that you have to locate a plastic or metal cog wheel, usually on the right side of the VCR that you can turn with your finger. This makes the VCR motor move. Also there is one that works the tape eject mechanism. If you can find the one to wind in the tape before working on the one for the tape eject than you stand a chance of rescuing the tape, if not then it will get some damage. Don’t worry about turning the cog wheels with your finger as you can do very little harm to the VCR with no tools involved and no power on. Moving the cogs this way will only cause very small movements with the tape motor and eject so you will need to be a little patient and you will soon see what is happening. Once remove run a cleaning tape through the VCR before you use it again. With the limited space available her it is difficult to give you much more info.
On this page you are offered with service manual for MV-3090G Video player existing in our database. Icons placed on the left of file name will prompt you in which format and in what language repair manual download Teac MV-3090G Video player are represented in this file. http://www.givemefile.net/smanuals/video_players/teac/mv-3090g.html
Most Panasonic VCR use a mechanisms with a letter. For example the NV-HS900 uses a K Deck. What you need to do is type the model number into google and search for which deck it uses. Then with luck you might also find the instructions for setting the deck up correctly. I got the K-Deck one free.
Tape "eating" is usually caused by a no take-up condition, that is, the take-up spindle isn't being driven, and thus a certain amount of tape spools out inside the mechanism until the logic circuit senses an error condition and places the machine in an off or stop mode.
Cleaning the head shouldn't cause this, assuming you knew what you were doing, and nothing was broken or bent in the process.
Look down in between the spindles, and you will see an idler wheel which pivots between the spindles, depending if the mode is Rewind, Fast forward or play. This idler mechanism should pivot freely. If the grease is dried or sticky, or the idler is otherwise broken- gear teeth missing, etc. such must be corrected.
If the idler needs replacement, one might be available from the manufacturer, or a parts supplier such as MCM Electronics.
I'm guessing the "black thing in side" is referring to the actual tape itself- ribbon like which can be spooled out of the tape case.
If so, then your VCR may have a mechanical problem of some sort, which results in a "no tape transport" or "no tape takeup" problem. If the latter, the right reel (takeup reel) is not being driven. Older VCRs often used a small rubber rimmed drive mechanism to drive this reel. Newer VCRs (10 years old or less) pretty much use a gear drive. Something may be broken here, or perhaps the gear is stuck. This gear assembly has to swivel back and forth, from left for rewind, to right for takeup or fast-forward. Unfortunately, you can't see the gear once the tape is in the machine, at least not from the topside.
Suggestion: Take the top cover of VCR off, look for this gear, and see if it swivels freely, look for broken gear teeth.