The record player that wants to be a washer.

[jasonl]

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Interestingly enough, it sounds like an Oasis.

 

[frigilux]

No doubt rigged by someone who was trying to get through Wagner's 'Das Rheingold' as quickly as possible, LOL!

 

[whirlcool]

Thanks for putting that up, Jason.

I have heard of turntables doing such a thing as your video demonstrates. I have also heard of turntables flinging records across the room while doing this too!

The problem is usually a bad transistor or IC in the electronic speed control. Pretty easy repair if you have the right test equipment.

 

[laundromat]

I would want to play the album just to hear what kind of noisy sounds it would make.Could be interesting. Especialy a song like Inagodadavida or MacArthur Park.

 

[qsd-dan]

Right when it began to speed up a little past 45RPM's, I was thinking to myself, "I don't remember these having the 78RPM option." LOL!

I would get that fixed ASAP. Those units don't have the brick shithouse motors of the Garrard 301/401 or the Thorens 124's.

I know that BIC 960, 980, and 1000's would play backwards when the motor capacitor would crap out. I bet that freaked out the users who were playing some Black Sabbath, lol.

BTW, REAL turntables don't have any IC chips!

 

[a440]

I have had turntables do this.....

I assume that it is a direct drive.

Most Technic turntable that were direct drive have a magnet that is focused on the turntable metal platter. The outer sides of the platter. If you pull the turntable off, you will see a magnet that looks like a cassette deck head. Many time these "sensors" get very dirty. Build up of lint, grease, you name it. Clean it off and also clean the spinning platter. This usually takes care of it. These Technic turntables were built quite well. The motor's were apt to take a beating. Many people used audio-technica disc stabilizers. This was placed on the top of the record being played. Some of these stabilizers could weight as much as 3 pounds. Technic turntables were able to play without an issue with these in place. This gives you an idea of how much torque these motor's have.
Brent

 

[spankomatic]

My record player sometimes wants to be a washer too..... Filter Flo!

 

[tolivac]

Never seen a Technics DD TT "take off" like that one.I did fix a Technics SP25 TT that a disc jockey spilled coke into-when you tried to engage the TT at any speed the platter "jittered" instead of turning.Took the unit apart and washed the Coke residue off the circuit boards-then let them dry-reassembled the unit and it was fine.Glad the station had a spare TT in their parts supply to use while the Coke on dried out.Technics TT's for commercial use generally had plug in IC's on their boards.SP10 had the socketed IC's.On the one in the video clip-probably the speed sensor and servo IC's have gone-probably need replacing-in the consumer TT shown that would be difficult since the IC's are soldered into the boards.Another possiblily is a shorted motor drive transistor.Could tyhe magnet on the bottom of the platter have filings or other magnetic debris on it-When servicing these the platter should be set down on a CLEAN surface so the magnet under the platter for the motor doesn't attract debris-the magnet is very strong and the stuff is DIFFICULT to get off the motor magnet.The magnet is in the CENTER of the platter on the bottom.Another ring is on the platter for the speed sensor servo.

 

[alr2903]

Jason, you put that stereo lid switch back together right now b4 someone gets hurt arthur

 

[toggleswitch2]

Aw, how special! It realized to keep current it had to spin like a CD player!

 

[toggleswitch2]

Well at least now some kids will have seen one.....

I was at a wedding. Kid (10 y.o. +/-) runs up to mother and askes "Mommy what's a record player?"

I aged instantly.

 

[frigilux]

When my friends' kids are over, they will pull an album out and examine it like it's an alien object from another galaxy. They think its hilarious that you have to flip it over when Side 1 is finished. Then I show them a LaserDisc...

 

[whirlcool]

BTW, REAL turntables don't have any IC chips!

Like hell they don't! A lot of direct drive turntables use IC's for the logic in setting the speed. I have a Kyocera belt drive that has a logic board with an IC on it. And that's quite a turntable. The Dual CS5000 has an IC in it too. On that model if the speed isn't EXACTLY on target the arm will not set down and a warning will be displayed.

 

[tolivac]

I can go along to a degree on the statemaent that real TT's don't have logic chips.Most Broadcast TT's DON'T! and for good reasons-RELIABILITY and ease of service.Things like TT's in commercial service need to be able to be fixed quickly and easily when they break-and they are more "DJ" proof.DJ's can be hard on TT's.Probably besides the Techinics are the QRK line of TT's that were common in broadcast use.These had simple Syncronous drive motors,idler drive wheels that drove the inner rim under the platter.You just had to keep the idler puck and TT platter,and motor drive surfaces clean.To do that took me only about 5 min with an alcohol damp rag.Technics TT's are pretty reliable-but when they really break can be time consuming and EXPENSIVE to fix.That is why many consumer ones are junked when they break.I USED to have a top of the line Techinics TT but replaced it with a Rega Planer 3 belt drive TT years ago-the belt drives do SOUND better.DD TT motors are subject to "cogging" esp the low end models.The high end DD models-such as Technics SP 10,25 with heavier platters are more motor poles.This made the cogging less noticable.Beleive me you can hear the diffrence bwetween the DD TT and the BD one-I used to have a preamp with two TT inputs and the belt drive Rega sounded much smoother-no "jittery" sound to the music from the cogging.Also idle drive TT's don't have the cogging problem.That is why the BD and idler drive machines made a comeback.Remember when DD machines where common in the 70's?also Denon high end DD TT's were very good-they also had more motor poles and heavy platters.But those were more expensive than the Technics TT's.

 

[westingman123]

I aged instantly...

lol, I was humming the theme to the Mary Tyler Moore show the other day at work, and one of our video clerks inquired as to what it was. Incredulous, I told her...her reply? "Who's Mary Tyler Moore?" After I picked up my jaw, I sent her to TV Land.

 

[jasonl]

I had a dual 604 direct drive TT that really sounded good. It had an Ortofon OM5E cartridge (entry-level but it sounded great) With my equipment I couldn't hear the "cogging". My only complaint was with the finicky speed adjustment.

 

[danemodsandy]

William:

" I aged instantly...

lol, I was humming the theme to the Mary Tyler Moore show the other day at work, and one of our video clerks inquired as to what it was. Incredulous, I told her...her reply? "Who's Mary Tyler Moore?" After I picked up my jaw, I sent her to TV Land."

One nice thing about situations like this - when you turn young people on to classic shows and performers, they often become bigger fans than those of us who grew up "back in the day."

I run the MaryRhoda discussion group on YahooGroups, which is a fan group for The Mary Tyler Moore Show, and we have quite a number of members who were a long way from being born when the show was on prime time. One of our members is all of nine years old.

I have also turned a young person into a raging Audrey Hepburn fan.

 

[paulg]

I've seen that trouble before.

I remember fixing a Technics SL1200MII (I think) about 20 years ago with that same problem.
Servo problem to be sure. In my case, the unit stumped our veteran turntable tech. What is turned out to be was a fluxy solder connection on the main PWB. I cannot recall what type of "HALL" sensor this uses. However, if cleaning the unit doesn't fix it, try resoldering all connections on the servo board even if they look good. A resistive solder connection can make a direct-drive TT take off.
... and yes I did run into those BIC and Zenith turntables that rotated backwards due to a shorted capacitor. TRIVIA. Did you know that popular BIC belt-drive turntable was actually designed by VM? They went bankrupt before it went to market and sold the design instead.

 

[mathewhebailey0]

78 rpm on DD Technics turntables

Mostly the Technics SL 1200 MK2 or up can be modified to play 78 rpm. To play 78,you press & hold down the 33 button & press the 45 button. The circuit boards have to be modified to use all 3 speeds.