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aperhOffline
Post subject: JVC l-a55 counterweight question  PostPosted: Sep 12, 2007 - 07:12 PM
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I recently acquired a JVC l-a55 turntable and I haven't been able to find a manual for it or a description online of how to adjust the counterweight. The way it's built is the end of the tonearm has a groove down the middle and the weight itself has a spiral groove on the inside. I'm assuming that they're supposed to line up when you twist the counterweight into the tonearm. My problem with this thing is that the black plastic weight dial moves freely from the metal weight so as far as i can tell there's no actual way to dial in the weight while screwing it in. I've attached some pictures to better show what I mean. Sorry if I wasn't clear enough, if I need to I will clarify myself.



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aperhOffline
Post subject:   PostPosted: Sep 12, 2007 - 07:13 PM
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two more pics



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Post subject:   PostPosted: Sep 12, 2007 - 09:28 PM
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This should be sufficient.



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Post subject:   PostPosted: Sep 12, 2007 - 09:31 PM
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Try this:

Adjust the counterweight until the tonearm 'floats' (perfect zero balance, it won't go up or down).

Now hold the counterweight and turn only the black dial until it reads "0".

Now hold the black dial and counterweight firmly together and turn both until you've dialed in the correct tracking weight, e.g. 1.5 grams (or whatever your cartridge manufacturer recommends).

That should do it.

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NitroOffline
Post subject:   PostPosted: Sep 12, 2007 - 09:32 PM
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And finally (only two pics can be attached per post).

By the way, Google works really well. There are several sites with good information for this.

And, Vinyl Engine has 74 manuals for JVC turntables.

Graeme, can we perhaps make this a sticky? I can add pictures for installing a belt also.



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aperhOffline
Post subject:   PostPosted: Sep 12, 2007 - 09:54 PM
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Thanks guys, those pictures helped.

By the way, just so you don't think I'm a dumbass, i *did* check vinyl engine and they don't have my tt's manual, and I did use google, however I dunno how i missed all this information.

But again, thanks Smile
 
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NitroOffline
Post subject:   PostPosted: Sep 12, 2007 - 10:29 PM
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I wasn't implying anything about your intelligence. Perhaps others will read this and not have to ask or answer the same question again. When using Google, make your search for "adjust tracking force". I got several good hits that will have more detail than the pictures I posted from an old turntable manual. That's why forums are so nice for information. You can just look around and usually find what you need.

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GraemeOffline
Post subject:   PostPosted: Sep 13, 2007 - 01:33 AM
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Quote:

Graeme, can we perhaps make this a sticky? I can add pictures for installing a belt also.


Have done. Although this is a request regarding a specific bit of gear, it's pretty generic and lots of turntables have a very similar arrangement.

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aperhOffline
Post subject:   PostPosted: Sep 13, 2007 - 12:44 PM
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It might just be a better idea to have a sticky with the several different counterweight arrangements out there instead of just this specific one
 
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GraemeOffline
Post subject:   PostPosted: Sep 13, 2007 - 04:27 PM
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Yes, possibly it would - although I would think this is the most common arrangement.

If enough people post the differing methods, we can rename the thread and make it less specific.

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