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Meier Corda Concerto problem *HELP NEEDED*

post #1 of 3
Thread Starter 

Hi all,

 

I have a problem with a second hand Meier amp I just received and wanted to post up and see if anyone could help. I plugged the amp in this evening and it fired up as expected, however when I plugged a set of headphones in I found that there was no sound coming through.

 

After further inspection and a bit of fiddling with the volume control I got sound to come through for a split second and then disappear again. I have tried changing the gain and crossfeed toggles with no success. I also removed the knob on the volume control via the grub screw to check the shaft but everything seemed good there too.

 

Does anyone have any ideas as it would seem the amp itself is not broken but maybe something to do with the relay not opening to push the sound to the headphones. I can also confirm that the LED closest to the volume control (which I believe indicated there is a signal passing through) is NOT lit up. After wiggling the volume control around and getting sound for a split second it DOES light up.

 

Anyone have anything I can try as I really dont want to send this amp back to the guy I bought it off :(

post #2 of 3

I realize this is am old post but I just purchased a used Concerto that exhibits very similar intermittent function. Is this a known problem with the digital potentiometer?

post #3 of 3

After fiddling around with this for a while I resorted to the old tried a true cycling of the potentiometer to try and help clean it up. After about 30 cycles through its full range, the problem disappeared completely. The unit had been in storage for some time and although the volume pot design is fully discrete, the position sensing was obviously cleared up by the physical use of the pot.

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