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Somethings wrong with my little Dot MKII

post #1 of 7
4/13/11 at 3:58pm
Thread Starter 

I've been using it alot lately .. and today when I turned it on I could only get sound from the right side, and it seemed quieter.  I switched tubes around on both power & driver .. still no left sound.

 

I took off the bottom plate, and cannot see anything burned/broken.

 

Anyone in the Seattle area that can take a look at it?  I don't want to wait weeks/months mailing it back to Shenzhen, China

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post #2 of 7
4/14/11 at 7:31pm

some photos might help....

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post #3 of 7
4/14/11 at 7:41pm
Quote:
Originally Posted by AudioCats View Post

some photos might help....


x2

 

 

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post #4 of 7
4/15/11 at 7:37pm
Thread Starter 

DSC_4805.JPG

 

DSC_4809.JPG

 

DSC_4815.JPG

 

DSC_4818.JPG

 

DSC_4825.jpg

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post #5 of 7
4/17/11 at 6:11pm

ok, here is what to do:

 

You assume all responsibility for your own safety, of course.

 

With the bottm plate removed, turn the amp on. touch the L and R pad (next to the volume pot) with a screw driver. Do you hear any noise (from the phones) when doing that?

 

by the way, the soldering on the L pad doesn't look so good.

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post #6 of 7
4/27/11 at 3:27pm
Thread Starter 
Quote:
Originally Posted by AudioCats View Post

ok, here is what to do:

 

You assume all responsibility for your own safety, of course.

 

With the bottm plate removed, turn the amp on. touch the L and R pad (next to the volume pot) with a screw driver. Do you hear any noise (from the phones) when doing that?

 

by the way, the soldering on the L pad doesn't look so good.



I did not hear any noise from tapping/touchingthe L or R pad confused.gif

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post #7 of 7
4/27/11 at 3:38pm

hmm, I was assuming those pads are on the signal traces (after the pot), touch a pad with a screw driver (acting like of like an antena) should inject some noise into the circuit. Looks like I got it wrong.

 

any picture of the other side of the board? you probably have to take it out of the amp to do that, though.

 

 

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