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MP3 player can boot, but can not connect to the computer, fault repair techniques

2009-06-26 03:06:26 author： from：internet view times：478 font sizw：【large】【middle】

　　If your MP3 player can boot, but can not connect to the computer, Failure due to the following situations： 1. First ，consider to check the USB data lines whether there are any problems 2 to check pla ...

If your MP3 player can boot, but can not connect to the computer, Failure due to the following situations：
1. First ，consider to check the USB data lines whether there are any problems
2 to check player USB interface whether there are any problems
3. Check USB data line D + / D-to-ground resistance is smaller (normal resistance of about 500Ω), if the quality of small-to-ground resistance or short circuit, main control IC to prove bad
4. If the USB DET normal to the main search USB data lines and control normal