Mp3 interface is broken, so that the master electric soldering iron melted a lot of tin welding, found that Mp3 can only be detected after connecting the computer, and then will be lost. Previously there is a U disk is also, the former plug in the computer will be lost, and then plug no problem, because the voltage caused by low. So I suspect this is caused by an increase in the resistance of the interface.The tin that melts can be washed off in heating, how to avoid burning the electric circuit when welding?Master pointing
Did you find that the master is a novice ah, the estimates are not welded, I suggest you find a person with iron will help you re welding, pay attention to the use of ground wire with iron, preferably with constant temperature, or electrostatic iron may damage the sensitive element in the MP3, so there will be no try, or go to the maintenance station to make it safe,
It is impossible to increase the resistance at the ohm levelWelding must be guaranteed below 270 degreesAnd do not solder short circuits
You don't know what position you are not using the welding solder bar to place too much ah what fell short of tin and iron welding can point out if you want to fine point welding can change a good point of iron or the tip of the soldering tin resistance can be ignored
