Technics SL1200?

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chgolatin2

Technics SL1200?
« on: 25 Jan 2010, 09:28 am »
I have the SL1200 in combo with the Jolida JD9, Jolida 1000RC.  Listening to vinyl today after setting up the turntable I notice that I could only hear audio through one channel only, check my amp, speakers and connections and everything seems to work so what can the problem be?  I'm thinking that "maybe" is the cartridge but I'm not sure.  I may just to stick to regular redbook cd's... :scratch:


Browntrout

Re: Technics SL1200?
« Reply #1 on: 25 Jan 2010, 10:28 am »
If you change the connectors round you can find out whether it is the cart or not.  :thumb:

Miney

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Re: Technics SL1200?
« Reply #2 on: 25 Jan 2010, 01:26 pm »
Agree w/Browntrout; my first instinct was a tube in the JD9 (happened to me).

Wayner

Re: Technics SL1200?
« Reply #3 on: 25 Jan 2010, 01:34 pm »
Yes, flip the left and right channels from your turntable to the preamp. If the channel out remains, then it is the preamp. If the channel out switches, then the table is the source.

If the table is the source, unscrew the headshell and take a look at the connectors on the phono cartridge pins. Did one come off, or are any loose? You could also take a volt/ohm meter and check for continuity from cartridge pin to headshell connector.

The other area of trouble for tables is the interconnects and more then likely, the molded on RCA connectors can be suspect. To prove that, take your volt/ohm meter from the connector on the arm (with headshell removed) to the the RCA jacks. There are 4 pads at the end of the arm that eventually get connected to the shield or tip of the RCA jack, just can't tell you which is which, but eventually thru trial and error you should have continuity from all 4 pads.

If you have determined that one of the RCA jacks is bad, you will have to replace them.

Wayner

PMAT

Re: Technics SL1200?
« Reply #4 on: 25 Jan 2010, 03:18 pm »
Don't give up on the TT. Your setup looks nice.

chgolatin2

Re: Technics SL1200?
« Reply #5 on: 26 Jan 2010, 05:52 am »
Thanks for the help, I really hope that the pre amp is not the problem since I just recently purchase it  :scratch: hmmmmmm

lonewolfny42

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Re: Technics SL1200?
« Reply #6 on: 26 Jan 2010, 06:17 am »
Don't give up on the TT. Your setup looks nice.

Agree...but spread those speakers out a little more... :wink:

orthobiz

Re: Technics SL1200?
« Reply #7 on: 26 Jan 2010, 03:11 pm »
Agree...but spread those speakers out a little more... :wink:

From what I see, chgolatin2 is married so that may be the only place for the speakers. Don't ask me how I could surmise such a thing.

Paul

Miney

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Re: Technics SL1200?
« Reply #8 on: 26 Jan 2010, 03:36 pm »
Thanks for the help, I really hope that the pre amp is not the problem since I just recently purchase it  :scratch: hmmmmmm
Bought my JD9 back in April and lost my left channel after about a week.  Called Jolida; they indicated other complaints of this type and that they seemed to have received a bad batch of tubes.  They offered to replace at no cost if I returned the bad one.  Never did get around to it  :duh: as I had already ordered a pair of Sovteks to replace the stock EHs.  Not one problem since installing... 

Norman Tracy

Re: Technics SL1200?
« Reply #9 on: 26 Jan 2010, 07:16 pm »
chgolatin2, nice system!

Good suggestions above, here is another. With tonearms like the one in the SL1200 that use detachable headshells that interface can be another source of channel loss &/or noise. I really like detachable headshells when it comes to mounting cartridges and swapping among carts. The down side is whoever specified the 4-contact connector built into the headshell tonearm interface used springloaded point contacts which are not as reliable as typical types where a pin slides into its mating contact.

A twist of the ring at the headshell interface and the headshell will easly pull out of the tonearm (we have our stylus guard in place, right?). On the headshell end you will see four hopefully gold plated contact bumps. Look into the tonearm connector and there are four mating contacts. The ones in the tonearm are actually spring loaded and when the twist ring seats the headshell the springloaded contacts are pressed together. The actual electrical connection is just a point where the radius of the headshell contact presses into the flat surface of the tonearm contact. Given the mV and even uV signals passing this way to often the high impedance 47k of the phono stage even a microscopic contamination causes problems. Cleaning both the headshell and tonearm contacts and checking that all four of the spring loaded contacts are free to move and not stuck in is the maintance task for this interface. Ideally use contact cleaner with a lint free applicator. Second choice is household rubbing alcohol and a q-tip being careful not to leave behind cotton strands fron the q-tip. One could also use a clean pencil eraser to polish off the oxidation, again being careful not to leave behind shards of rubber from the eraser.

Wayner

Re: Technics SL1200?
« Reply #10 on: 26 Jan 2010, 09:18 pm »
If your not a DYI guy (and many aren't, no need to feel any lesser), maybe you could call Kevin at KAB. He specializes on these decks and has many neat upgrades. I'm sure he could fix your problem in a hurry.

http://www.kabusa.com/frameset.htm?/index.htm

Just a suggestion.

Wayner  :D

chgolatin2

Re: Technics SL1200?
« Reply #11 on: 27 Jan 2010, 06:22 pm »
Thanks, well.  I will call Jolida and inquire about the bad tubes.  Hopefully thats the issue.  The JD9 has been modded and it sounds amazingly good!

mjcmt

Re: Technics SL1200?
« Reply #12 on: 22 Mar 2010, 05:54 pm »
Thanks, well.  I will call Jolida and inquire about the bad tubes.  Hopefully thats the issue.  The JD9 has been modded and it sounds amazingly good!

Sweeeeeet system! Love it. Did you contact Jolida? Tube do go bad prematurely. Might be time to try some NOS tubes.
« Last Edit: 25 Mar 2010, 11:38 pm by mjcmt »

rudy99

Re: Technics SL1200?
« Reply #13 on: 30 Mar 2010, 03:28 pm »
I have the SL1200 in combo with the Jolida JD9, Jolida 1000RC.  Listening to vinyl today after setting up the turntable I notice that I could only hear audio through one channel only, check my amp, speakers and connections and everything seems to work so what can the problem be?  I'm thinking that "maybe" is the cartridge but I'm not sure.  I may just to stick to regular redbook cd's... :scratch:


that is a sweet setup and very stylush

bravo