I'll have another look at the drive - I was presuming the same idler wheel that flicks back & forwards for FF & RW, was the same drive for the play/take-up drive.
Like you say - damn good machine - bought it last year 2nd hand, used it for 4 weeks then this happened. Really want ot get it working again - 1st 3head machine I have ever had.
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Re: TEAC TV770 no play
If it uses the same idler(i honestly cant remember now) it may still have drive in ff and rew but not in play because of the reduced torque required and much less mechanical coupling force to the drive surfaces of the idler to the reel base as a result. Cleaning idlers with acetone gets the best resuts. Takes the top layer off!! Be careful not to get it on any non greasy plastics or and external casings(will leave marks). I often use an emery board(for finger nails) to get a decent new rubber drive surface if I cannot reshod a failed idler with a new rubber tyre. Let me know how you go :)
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You need new brake pads installed as the ones in there now are dried up and may have fallen off. This is very common with older decks or 30-40 years old. I am still working on these decks at Skywave Tape Deck Repair in the Chicago area.
Someone will have to open the unit to see what is happening---either tape is not loading all the way or when FF or Rewind hit not moving the reels----could be as simple as a belt or a bad drive idler (most use either a rubber wheel or gears to move the tape in Play, FF, and Rewind.
Hello Can you hear the motor running, when you press any of the Play, Rew or FF buttons?. Just place your ear very close to the player and listen to it. If the answer is 'yes', the drive belt is broken or slipped off. You have to replace the drive belt. If the answer is 'no' the motor of your device's drive mechanism has damaged, and should be replaced. OK.
WISH YOU A PROSPEROUS 2012. Gopakumar G, Kerala State, South India.
The deck will need new belts and idler drives cleaned and serviced, and perhaps some idler tyres replaced. You can get a belt kit from these guys. replacing them is not such a difficult job if you have some mechanical aptitude. Just take it slowly, and focus on getting the transport out of the unit.
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The unit sounds like it has a take up clutch or takeup idler problem. Check all the drive assemblies in the unit. Remove the cover from the front of the transport inside the cassette well, and check the condition of the idlers and reel base drives. The counter belt can also gatherup and prevent the takeup reel from working correctly, or fire the auto stop mechanism preventing it from playing, although that sounds to be ok in this case as the unit will FF and REW ok. The takeup drive is supplied by a different drive idler as it requires much lower and more controlled torque. This unit was always considered to be a great tape deck and is well worth a bit of attention for restoration. You can get a new belt kit for $19.00 from here
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I thing that you are having problems with your gear assembly on the carriage. FF and RW use a series of gears to move the tape from one reel to the other. If possible could you take some pictures of the gear assembly. More then likely the gears are not making contact or the drive belt has slipped. Granted this is just conjecture until I can see those pictures of the assembly.
When a VCR eats a tape, it can be cause by a couple things.
1. There is a rubber wheel called a "pincher wheel" that compresses the tape against the "capstan". The capstan is a shiny metal spindle connected to a motor. The pincher wheel can become worn and/or dirty (slick) from the oxide coating off of the tape. You can try cleaning the pincher wheel and capstan with alcohol or try using a re-grip solution on the pincher wheel. Last thing to do is replace the pincher wheel. Look to see that the pincher wheel is doing its job by pulling the tape through. The pincher wheel & capstan are not used during a fast forward or fast rewind, so if your tape is getting caught during the FF or RW and not Play, it's probably not related to capstan & pincher wheel.
2. There is a small tire wheel called an idler tire. This tire pivots between the sending and pickup reels of the player. Its also used during fast forward & rewind as well as play. If the tire is worn, the tape won't be wound up as fast on the take-up reel as the sending reel during play. This means more tape is coming out of the cassette than can be wound up on the takeup reel. You can try using a re-grip solution on the idler tire or replace it.
3. You didn't say if the unit played ok. There's also a brake pad that is designed to grab and stop the tape wheels from spinning when you hit stop. If those pads are worn, the wheels will not stop fast enough and the tape will continue to feed (spool) out of the cassette and not be taken up by the other wheel.
So when when you hit eject, the excess tape that should have been wound up tight in the cassette before the eject sequence, is getting caught inside the player.
Let me know if I can be of further assistance to you.