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DC Motor turning continously in Cassette Deck

I looked inside of an old cassette deck that I have TEAC V 307 to put a belt back on the capstan flywheel. I suspected correctly that the belt was slipping. the belt is old and i will replace with a new one, however, now when i turn the power on the DC motor ( connected to the capstan flywheel via this belt) turns continuously regardless of what 'play status' that I'm selecting. In fact it turns continuously even if no status is selected. I'm wondering if this is normal. when i hit FF, REV, Play, REcord, they all work correctly, its just that the DC motor is continuously turning independent of any play status. I don't remember it doing that when I opened the deck but then again I didn't have the power on when I opened it up.

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Yes this is normal. the deck utilises what is called a rolling transport and the motor runs continiously to allow for mechanical cam engaged functions to work.

Posted on Dec 09, 2007

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Posted on Jan 02, 2017

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1 Answer

How to replace the belts in a Teac A300 cassette deck


The mechanism needs to be taken apart sufficient to get to the flywheel and capstan motor- this usually entails taking the metal motor bracket off the back. It is not that difficult once you have done one. I may have replaced 50 to 100 of them at Teac in Chicago. Also oil the capstan bearing when changing a belt.

Aug 08, 2013 | Teac Audio Players & Recorders

1 Answer

Replace belt on teac x1000r


The belt being broken is just the tip of the iceberg. Yes, people change them themselves all the time then they bring the deck to me when this does not work. Besides the belt, the capstan motor has to be determined good or not- sometimes a sticky belt can burn up the motor a $150 part. Typically, pots need cleaning, Flywheels should be extracted and oiled as well as capstan shafts cleaned and reconditioned- the Flywheels are particular as how they go in. I get units in with them reversed and another problem is created. The adjustment of tension arms requires a Tentelometer and the voltage references have to be set- they are usually off due to mechanical changes to the tension arms. The the calibration of the deck should be done. Also people are buying a wide belt in E bay and it does not work- I end up taking it out and putting in a correct sized belt. Rollers and Pinch Rollers need oiling and the washers put in where missing and so on.
If you are in Chicago area look up skywave Tape Deck Repair on the internet- I work on X1000R and X2000Rs all the time.
If in New Jersey Russ in in Emerson.

Feb 18, 2013 | Teac Audio Players & Recorders

1 Answer

Teac a-3440 will not play


Hi Gary,
This makes me think the Capstan Shaft is not turning either due to a broken or stretched belt or that the capstan motor itself has stopped working. This may be a job for a Technician. You first determine if the Capstan is turning or not- this is the metal post that contacts the Pinch Roller that rotates and is the way the deck gets it's speed regulation. If it is not turning look inside the deck from the side to see if the flywheel is turning and that the belt is on that flywheel. Lastly make sure the capstan motor is turning.
Beyond that a Tech may have to take over from there. I am in the Chicago area and can repair it if you are close. Many people send me units from all over the USA anyway.
My name is Sam. I operate Skywave Tape Deck Repair
skywavebe@sbcglobal.net if you need my help.

Aug 17, 2012 | Teac Audio Players & Recorders

1 Answer

Thaks for helping. My tape deck door has suddenly stopped working. the tape is inside and when i turn on the wpower there is a clicking sound. it is a TEAC AD-500 CD player/reverse cassete deck


Without physically looking at the cassette deck myself, I cannot be 100% sure the tape is wrapped around the pinch roller and capstan. The capstan is the chrome rod which the rubber pinch roller pushes to regulate the speed of the tape moving across the head. However it is approximately a 90% chance the take up reel for the tape stopped working from a bad tape or a loose belt which drives the tape take up reel. The clicking sounds like it could be the auto reverse solenoid because it thinks the tape has reached the end of play. The fun part is to remove the tape which you may have to disassemble the front panel if you cannot gain access to the tape from the top or bottom. You will need to cut the tape and remove it from the capstan and pinch roller to open the cassette door. Sometimes you can remove the capstan to free the tape. Once you have cleaned all the tape out of the unit make sure the belt for the take-up is good. If it is glazed, cracked, loose or broken order a belt. Clean all the pulleys and capstan and replace the belt. Your unit should be functional after the above procedure.

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I need a capstan drive belt for a TEAC 3440 reel to reel recorder. Wherr can I find one?


Just measure the diameter in MM and put the result into google with the words 'cassette drive belt'. Belts are not maker specfic.

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1 Answer

How to replace drive belts on Technics dual Stereo Cassette Deck RS-TR272 P-K? Thanks desmondali@gmail.com


First of all you will need some mechanical mind to open out the set. The tape mechanism has to be removed and the connections should be noted and removed. If the old belt is already in the mechansim then you will not have any issue with the direction of the belt to go around the capstan flywheel. If you have alreaddy obtained the correct belt then carefully open the back of the mechanism to remove and reset the new belt. When replacing check for the free running of the capstan if not use a small drop of oil to free. If the belt was not there then wind from the motor to the second flywheel after running it around the first flywheel to drag it along so that when the motor turns you have the flywheels turning freely. reset the back plate using a thin probe type tool to hold the belt and release to the motor. For a first time it may be a bit difficult but try again. Hope you get this right. Good day

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1 Answer

Dc motor turning


Hi.
Better quality cassette decks use this method as it puts less strain on the motor because it dosen't have to keep starting and stopping.

John w

Dec 07, 2007 | Audio Players & Recorders

2 Answers

TEAC X1000R Stereo Tape Desk (reel to reel)


usually its a capstan drive belt. $10-18 for the belt & 30mins repair time - you'll be up &brunnin b4 you know it bigmattt@gmail.com

Nov 24, 2007 | Audio Players & Recorders

1 Answer

TEAC model A1500 tape recorder


What i did to solve this problem on my A-1500 was to remove the tension arm, the pinch roller and the front face holding screws , pull off the rubber faces from the reel hubs and remove them, remove the front metal face plate... in back remove the wood backing panel... inside the deck rear, remove, (without letting them fall into the mechanism) 4 screws that anchor the heavy front cast piece that holds the capstan flywheel...carefully lift the cast piece that holds the flywheel. away from the deck face just enough to allow the old belt be removed, and the new one installed...ensure the belt is installed and goes all around the flywheel..and is not pinched when you push the casting back against the deck face and reinstall the 4 rear anchor screws. place the belt around the upper drive motor pulley wheel.. small diameter part on motor pulley and large diameter part on flywheel for users of 60 hz. Ensure 60hz is selected on switch..or 50hz if that is what you need.(for 50hz ensure belt is on large motor pulley part and smaller flywheel diameter part. with deck lying down or leaning, place a few drops of light lube oil into the felt at the bearing hole for the flywheel. Give the deck a test playback before completely reassembling and putting all the parts back where they were.

Nov 18, 2007 | Audio Players & Recorders

1 Answer

Deck turns on but doesn't do anything else. Motor runs.


The main flat belt you describe is probably the capstan belt. The "flywheel" you describe drives the capstan. I don't know the model number of your deck (it would help if you could say what it is), but I'm pretty sure that the flat belt should go around the big flywheel and then around a motor pulley that should be very close to the flywheel. The motor should spin the flywheel even if the play/FF/RW buttons are not engaged. This might sound funny, but the other "O" ring belts might be very important (control motor belts) or not that important at all (tape counter belts)--it depends on the model number of the deck. One more thing: Every healthy capstan belt I've ever seen is NOT sticky and does NOT glom onto itself. That belt sounds like it is very old and needs to be replaced.

Aug 21, 2007 | Teac DUAL CASSETTE A/R 110/220 Single Dual...

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