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Please help me with diagnosis

post #1 of 7
1/11/10 at 1:00am
Thread Starter 
Beyer DT990 2005

Right can suddenly is extremely low volume compared to the left. What is broken?

P.s. I already checked the balance at the source. It is the same for both L and R
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post #2 of 7
1/11/10 at 2:18am
maybe it is the plug? does moving the plug in different directions make and noticeable changes?
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post #3 of 7
1/11/10 at 3:03am
Thread Starter 
No. Moving the plug makes no difference.

Is it possible the driver needs replacing? What would be the symptoms of a bad driver?
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post #4 of 7
1/11/10 at 3:35am
Youngster,
Test resistance of each channel. On jack and on driver. If there are noticeable differences - then the problem in wire.
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post #5 of 7
1/11/10 at 4:02am
It could also be a bad channel on your amp or whatever you're driving your headphones with. Do you have a second pair of headphones around? Plug them in and you'll know if the problem is in your headphones or amp. You could also try plugging your headphones into something else to see if they work.

If the problem is in your headphones, I think it most likely that a solder joint came loose and is making poor contact. If a driver was blown it would either make no sound or very distorted sound.
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post #6 of 7
1/11/10 at 2:26pm
Thread Starter 
I called The Sound Surgeon, who services Beyerdynamic in the USA. He said it sounds like it needs a new system. By system I assume he means 'driver'.

The price for repair is the following:
System - $56.28
labor - $35.00
shipping - 12.50

Total is about $100. That is more than I had hoped

I wonder if I can get the part for less on-line. Is repairing this thing myself out of the question?
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post #7 of 7
1/11/10 at 2:41pm
Quote:
Is repairing this thing myself out of the question?
Just take them and go to friend, who have good soldering skills and multimeter... Open cups and check resistance and solder joints. I they are Ok then the last hope is replacing drivers...
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