Tape Project Forum
Tape Machines => Reel to Reel Tape Machines => Topic started by: Kim on January 18, 2009, 02:53:42 PM
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hey guys
I've got a problem with a nice old Teac A3340s : Its running too fast!
Not as much as turning the singers into chipmunks, but still.. its quite noticeable.
I'm a trained technician, but since I've mostly worked with the Akai W2W's (my favorite ;-) those are the only ones I've got the service manuals for.
To my knowledge and experience (both of which are limited with the Teac machines) there is no speedcontrol in these machines ?
I really hope one of you guys will give me a hint, it really would be a shame not to get this machine on its feet properly again.
Thanks in advance!
regards,
kim
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Hi Kim, I didn't find a service manual for free downloads (there could easily be one but on a quick look, no luck) but you can order one for a 3340s for cheap. Here's a good spot for all things Teac:
http://www.daeinconline.com/index.html
You might try asking over on http://www.tapeheads.net/. There aren't too many Teac owners on this forum but quite a few there. I find it hard to believe that there isn't some sort of speed control trimmer on the motor control board though.
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hey mate,
Thanks for the advice. I'll give that a try right away.
I'm still very puzzled with this fault... As far as I can see, the speed is "controlled" by the way the motor itself was designed.
To change the speed from 7,5 to 15, it seems that all it does is to change over to a different pair of windings.
If this is correct, it is beyond me how the thing could be running fast....
Anyway - I'll see if the guys over at tapehead can help me crack this nut
Thanks again!
//Kim
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It isn't a 50Hz/60Hz thing by chance is it? If set to 50Hz and running at 60 it would go a bit fast.
Is it stable? The other thing that happens to Teac/Tascam machines is the pinch roller solenoid doesn't pull in all the way due to old hard lubricant. This might lead to fast and erratic speed if the pinch roller wasn't fully engaged.
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hey steve
thanks for your reply, and good hints.
To the best of my knowledge, I do believe you've been thinking of two very plausible causes... unfortunately, I've already checked both of them out, without luck.
We're running at 230V 50Hz, and unfortunately, the switch is already set at "50Hz".
The speed is very stable indeed, just a little too fast.
I've also checked that the pinchroller is engaging properly, but all seems to be in perfect order.
This fault is driving me nuts! hehe
I've been trying to post about this problem at tapehead, but I have to wait a little because the moderator has to check if I'm a naughty boy or not, before making my post public.
Meanwhile, I've been doing a lot of searching around the net, and found a page where the specs for this machine is listed... this guy claims that the a3340 has a PITCH-control, enabling it to increase 5% in speed.
Well... IF such a adjustment is present, they really did a great job hiding it. I've been looking all over, and didn't find anything.
Can any of you confirm wether the a3340s really has got such a Pitch-control or not?
Regards,
Kim
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Remember there were at least 3 model iterations of "Teac 3340" in general. One of the last ones might have had a pitch control or a similar Tascam machine that was also 1/4" 4 channel
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Hi Kim, I found a free download page for all the 3340s manuals etc. I believe you'll find the speed adjustments under the left (your left) side panel. There's one for each speed. Here's the site for the downloads.
http://www.hifiengine.com/manuals.shtml
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Wow, Thanks !!
I'll go check it out right away! :D
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awww... its the wrong model :-(
The one I need is A-3340S....unfortunately it seems that the A3340 is quite different. (Different motor-type and schematics)
But thanks for trying
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hey guys
I've got a problem with a nice old Teac A3340s : Its running too fast!
Not as much as turning the singers into chipmunks, but still.. its quite noticeable.
I'm a trained technician, but since I've mostly worked with the Akai W2W's (my favorite ;-) those are the only ones I've got the service manuals for.
To my knowledge and experience (both of which are limited with the Teac machines) there is no speedcontrol in these machines ?
I really hope one of you guys will give me a hint, it really would be a shame not to get this machine on its feet properly again.
Thanks in advance!
regards,
kim
Kim... the reason your 3340 (happens in all versions) is speed is Teac's lubricant not remaining fluid over time... you need to oil the capstan shaft (2-drops), and you need to change the angle of the solenoid spring from the 3 o'clock position to 1 o'clock... this takes some of the tension off and allows the solenoid's through out to do its job.
Do the above and you'll have a working 3340.
RJ