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最近检修了几例 MP3播放器,故障原因多为电源或软件甚至是操作不当造成的。下面介绍两例有关电源方面引起的故障俭修。[例1]DIGITAL MP309A 型播放器,用户称被同学借去玩了几天后,现在无法开机。凭经验估计是超长时间使用,电池电压过低所致。此机设计为内置充电式电池。接上随附充电器给其充电,发现屏幕无充电反应。用万用表测量充电器输出端——USB 连接线,(该
Recently overhaul of a few cases of MP3 players, mostly due to failure of power or software or even caused by improper operation. Here are two cases related to power failure caused by frugal. [Example 1] DIGITAL MP309A player, the user said borrowed a few days after being borrowed by his classmates, and now can not boot. Estimated by experience is the use of ultra-long time, the battery voltage is too low. This machine is designed for built-in rechargeable battery. Connect the charger attached to its charge and found no charge response screen. Use a multimeter to measure the charger output - USB cable