Question about Audio Players & Recorders
SOURCE: TEAC V770 3head tape deck.
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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Posted on May 29, 2008
some weeks ago I got this really impressive deck (Teac Z 7000) from a colleague, and found the same problem. I fixed it, and the fix is not too complicated. It´s the potentiometers that do fail. All pots are from the same manufacturer (Alps) and construction. The problem is that the wisher is broken away from the holding plastic and will loose contact completely. You can check that with a normal ohmmeter: You´ll find the total resistance over the outer terminals but endless resistance from one of the outer terminals to the middle wisher contact. The values are: 100 kOhm linear for each of the upper left pots (fader,space), 2x22kOhm pos.log. for the lower left pot (phone volume). So, what does a broken wisher at the "fade in" pot do? The Recorder "thinks" that You selected an "endless" fade in time, and the result is : no record level. You can do an easy "quick and dirty" fix just to see if that´s the problem: Hold- or better solder- a say 47kOhm resistor in parallel to the conducted potentiometer terminals and try to record.
4 of 5 pots have been defective in my deck, and I´ve replaced them with standard types from my local electronic supplier (Conrad electronic, has a shop in Frankfurt/Main). Well, the new parts didn´t fit perfectly, I used a file to get them in (not visible from outside). Also I lost the possibility of pushing the knobs in and out, but that is not a really problem.
I assume this fix might also help owners of the Teac Z-6000 and Z-5000, which- most probably- use the same type of potentiometers.
This text was written by Boris Witke, Kelsterbach (near Frankfurt/Main), Germany. E-Mail:
email@example.com Please tell me if You were successful, possibly we get lucky users of these really fascinating machines.
Posted on Feb 24, 2009
I have a Harmon Kardon TD-3 that I'm looking to sell. It's not in its original cabinet, but in a smaller box that takes up less space.
Posted on Oct 19, 2009
SOURCE: I have a pioneer CT-F900
The take-up reel is dragging or the belt is stretched or broken. No surprise on a deck this old. Try Fast Forward. Try Rewind. Same result?
If it still doesn't work, and it happens with only one cassette, rap the cassette's flat side against a solid flat surface to loosen it. Try again.
If you're really an old-school deck user you probably know how to cheat the transport with no tape resent to make the capstans engage for cleaning. Try that. The two reels should spin opposite as if maintaining tension. If the right one is stationary or lethargic (try to feel how strong it pulls compared to the left one), there's a loose or broken belt.
Next step. Get out the can opener, go inside and see what's wrong. Good luck.
Posted on Dec 26, 2010
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