trying to fix some cans

[jrich523]

so i have this pair of sony MDR-V700's that one of the speakers stops working on.. its the speaker with the line going in to it... i took it apart and started to take a peek...
so there are a few weird things....
all of the connections look fine
wiggling the wire has no effect, even with a fairly rough wiggle.
if i tap the connections with a peice of metal it picks up again.. even with a very light tap.. a plastic tap/press has no effect
it doesnt seem to matter which connection i tap (red, black, green) it will pretty much always pick up again... kind of hit or miss though, seems the black has the best effect on fixing this, but not always...
also the majority of the time it seems to fade in and out, but not always..

my gut is telling me it has to do with grounding, but im not really sure...

what would you guys do?

[kanamin]

What are you tapping? Where the wires are soldered to the driver? Were you playing really loud music through them? Sounds like maybe there's a break in the coil in the driver, since wiggling the wire does nothing.

[Budgie]

Cold solder joint.

[jrich523]

Originally Posted by kanamin

What are you tapping? Where the wires are soldered to the driver? Were you playing really loud music through them? Sounds like maybe there's a break in the coil in the driver, since wiggling the wire does nothing.

yeah im actually tapping the solder points themselves.. basically if i put anything that is metal on any of the solder points it seems to pick back up.

i've had them for a while.. and i certainly have played loud music through them.

if there was a break in the coil why would touching the connections to the driver matter?

I assume if it is a break in the coil there isnt much i can do?

[synaesthetic]

I'm going to agree with Budgie and say it's a cold solder joint.