Question about Denon Audio & Video Receivers

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I have a denon DP-30 L II turntable. it has very low time the problem is the right channal is out. I have tried 4 differant cartridges. thay work fine on a yamaha YP-850. I have tried 2 differant mac amps thai I know are trouble free. CAN SOMEONE PLEASE GIGE ME SOME IDEAS. I am a licened aircaft tech but this is my weak aera electrisity and spelling

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  • bryan4p May 17, 2008

    i have tried TWO DIMM MACINTOSH AMPS THE FIRST PERSON MUST BE TIRED

    I HAVE USED A 10 POWER BACKLIT SCOPE NORMALLY
    USED ON TURBIN ENGINS DONT SEE ANY BREAKS

    ITS UNPLUGED PLEASE EXPLAIN WHAT WILL RESET OR CLEAE OUT ??????

    THANKS FOR THE PROMPT REPLEYS

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6 Answers

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OK, here with some assistance from a long-time (30+ years) turntable expert. You will need an ohmeter to test the two relevant wires, and equipment to tear the turntable down. (This assumes you are comfortable performing these actions.) Further, as you have indicated that the solution posed by MarkDay did not help, it appears that these are not related and the problem does not lie with the amp connections. Therefore, this should tell you if you have a wiring issue.

Basically, within the tone arm, there is a set of two wires that run from where the wires are attached to the cartridge within the tone arm, through the tone arm and into the turntable itself. Within the turntable, they attach to a circuit board, and are likely sautered to the board. (They will be two different colors. However, breaks of the type previously described, will likely be difficult if not impossible to see due to protective coating.) What we will do is test the wires from the cartridge to the circuit board to determine if one (or which one) is bad. It appears this is the problem - with a high level of probability - and will then require replacement of the tone arm. However, no one wants to spend the money for a new arm if it's not necessary. So, here's how to figure that out:

The bottom of the turntable should be removed, using basic screwdriver / necessary tools, but being cautious with that tone arm connection. Remove the cartridge from the tone arm on the top side, if you haven't already done so. There will be two different color wires that attach from the tone arm above (cartridge connection), down into the circuit board. Place one end of the ohmeter at the tone arm end of one color wire. Place the other end of the ohmeter at the circuit board end. If the meter shows full current (all the way up) the wire is good. If not, the wire is bad. Then you will likely need to replace the tone arm, as attempting to replace wires within the arm itself is quite difficult.

Once you have that in hand, if wires are sautered to the circuit board, which we expect, it will require appropriate tools to break that connection safely ("unsauter"). "Unsauter" the old wires from the circuit board, and sauter replacements to the circuit board. Remember that the new wires will be part of a new tone arm assembly, and must be placed in a manner identical to the original assembly.

Hope this gets you to the point where you at least have narrowed down your issue and can work further on getting it going. If you need further assistance, please post back, and we'll be happy to help as needed - and thank you for rating FixYa!!

Posted on May 17, 2008

  • Cheryl Whalen May 18, 2008

    bryan4p:



    Wanted to check in with you to see if you have determined whether the cables / wires within the tonearm were the problem, or if we need to move further into a different direction. Please post back if we haven't yet isolated the issue. As you know, we can't "fix" a hardware problem, but if we can diagnose the issue and help to direct you to a solution, we have reached the goal. Look forward to hearing further from you - and if you have reached resolution, thanks for rating FixYa!



    smartsolve

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Hi

maybe you have defective preamp one side channel or the RCA wire is defective, you can replace a new one RCA wire then odserve!!!

Posted on May 17, 2008

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Have you try the denon DP-30 L II turntable on a different amplifier?
Try to switch the turnable outputs and see if that works.
If the right channel still not working you might have a defective pre-amplifier input on your amplifier.

Posted on May 17, 2008

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Wire between cartridge (through tonearm) to rca jacks on back is most likely broken. Typical for this to happen at cartridge connector or at rca jack connector. Sometimes wire is broken within outer jacket making it practically invisible to see even with magnifying setup. A good audio/video repair shop should be able to repair this. Another possibility is faulty patchcord between turntable and preamp.

Posted on May 17, 2008

  • Mark Day
    Mark Day May 20, 2008

    Rewiring a tonearm is a delicate, fragile and tedious process. My original solution of having a qualified a/v shop do this still stands, Our shop carries parts for most major makes and models. BTW, smartsolve, its "Solder", and there are 4 wires, not 2.



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Please unplug the unit for 10 minutes and Try to set to factory mode and then use it .

Posted on May 17, 2008

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