Oh, I had trouble, the USB socket broke.
Thus collapsed contact pins to which he was soldered.
This happened when earphones fell from table, when connected with USB cable to laptop.
When I disassembled earphones it turned out that the socket is very unreliable fixed (there is a small rocking) because of it there is a high probability that contacts of the connector will come off PСB if even not strongly to shake connected to it cable.
To repair a broken socket it is necessary to glue it to the plastic case of earphones and to connect to PСB flexible wire.
To avoid breakage of the socket it would be necessary to fill space around of the socket with thermoglue, it will strengthen it on the place.
P.S. sorry, i use google translate
Edited by DrFaust - 2/15/14 at 1:46pm