Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems.

 
 
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Kim Sleep
 
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Default Uher deck repairs


A friend of mine has recently acquired a brand new Uher professional tape
deck. I have not had a chance to look at it, but according to him it has the
following problem:


(snip) I tried various cassettes from my library and they all seem about 20%
faster. So, I tried to record a A440 oscillator tone and used an electronic
tuner to watch what it was doing. It played back but the speed slightly was
changing throughout. I didn't measure voltage, just pitch.

Now, there is a yellow LED that says 'variable' which I'm assuming has
something to do with either servo or motor speed. When rewinding, the lamp
stays lit - but upon record or PB it was flickering at different rates. As I
have no manual, I'm not certain what the LED is for and the U.S. Uher fixer
wouldn't even answer my question. (His reply: "Send it in, we'll fix it".)
Wouldn't even tell me *what* the yellow LED indicates!!!! (Asshole!)

My suspicion is this was a European model and it's getting it's motor speed
from line voltage. Of course, the 50 HZ / 60 HZ make sense right? If it's a
import, regardless of the voltage - which I know is correct - would the
motor need to be changed if the unit was originally intended to be run at 50
hz? That's my question. Just give me your thoughts, a guess or a stab in the
dark. If you search Uher repairs - everything is in Kraut. The guy at SMC /
Nixontapes he calls himself - is the only guy I could find.(snip)


Anyone have any ideas?
And if it is truly a unit that requires 50hz, is there a power supply
conversion that can be done. I remember back in the 80s there were a ton of
kits that would allow 12volt clock kits to be used in cars, by supplying a
60 hz source into the dc supply.

--
Kim..."A Man Of True Frankenstinean Proportions"


--
Kim..."A Man Of True Frankenstinean Proportions"


 
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