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RE: MP-3

Posted by jumpsturdy (A) on December 15, 2011 at 13:32:04

In Reply to: RE: MP-3 posted by Lew on December 15, 2011 at 12:07:49:

Hi Lew,

Thanks for the response; built the M-60s I run the MP-3 with, so moderate DIY competency. Have checked and not found any loose connections or cold solder joints. Switched tubes from channel to channel. Tried my turntable (with balanced output) with another balanced system I have and all works fine. As do balanced inputs into Aux channels 1&2. Also unbalanced RCAs seem to work as well.

What is difficult for me to understand is that I was playing records through it a few days before and now there is absolutely no signal in one channel. Seems that if a capacitor or tube were to fail the change would not be that abrupt. So I am guessing it has to be something that would completely disrupt the signal in one channel without immediately being visually obvious.

Will get in there with a meter next, but suggestions of where to start would help. Even without knowing too much or having a schematic I am figuring that readings should be approximately the same in each channel, point to point, and that I should be able to at least track down where the readings differ.

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