Question about Technics SL-1200 Turntable

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Dual 1009. No audio from the stylus & humming.

Bought a Dual 1009 turntable off Ebay. No audio from the new cartridge, only humming. Has the agravating clip style cartridge holder that clips in the tonearm headshell. Tried cleaning the contact clips & phono jacks under the turntable & connectors to the cartridge as well. Still no deal. Was concidering re-wiring the tone arm bi-passing the clip. No idea where the wires would go to anyway. I read cleaning these connections will resolve the problem, not so. Also, the manual play switch won't stay on, goes back to stop position & won't stay running. Thanks for any advice. Chas1

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Trace all the connections to the cartridge. One way to do this is touching all audio input lines with a metal or screwdriver (holding the metal part and not the handle) while connected to the receiver with the volume turned up a abit to hear the 60hz humming sound. A louder humming sound will indicate a good connection path. Check also for good shielding of the audio wires to the cartridge. Generally, it's a wire problem troubleshooting.

WARNING!!! don't do this unless you know what you are doing. Don't ever touch the AC voltage wires OR someone will hum your mishap :-)

Posted on Jan 13, 2009

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I can help with this issue. To keep the platter spinning in manual mode, you have to cue the tonearm up and move it so it is over the record. Then flip the lever to manual. It should stay on in this position. This is a feature and not a bug.

Regarding the audio / humming problem. The Duals had what was known as a muting circuit that engages as the turntable is cycling between rest and play. The fact that you are getting no sound may be an indication that the muting circuit is still engaged. Here are a few things you can try:

1. If the unit was recently shipped, you may need to reset the mechanical function of the turntable. You can do this by locking down the tonearm to the tonearm rest, turning on the power and then flipping the lever for a full automatic cycle. The tonearm will stay fixed to the rest, but the remainder of the mechanical system underneath will be reset to proper positioning (this is detailed in the Dual manual). Of course, this assumes that everthing was OK prior to shipping.

2. Make sure your cartridge is properly mounted with a good stylus, check your tonearm wires (both in the headshell and underneath the turntable and finally, see if you can get underneath the turntable while you run an automatic cycle to see what is going on.

Lastly, if you can't get it going, Check out Bill at www.fixmydual.com He worked on my 1019 and knows them inside and out.

Good Luck,

Jerry

Posted on Apr 26, 2009

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For example, this one is sporting an ortofon cartridge of some sort.

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91e21a2.jpg
As the diagram shows, the stylus mounts to the cartridge, which then mounts to the headshell. This headshell is then connected to the tonearm (tube).

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UNIVERSAL MOUNT CARTRIDGES

c850b31.jpg

- Davis
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