海鸥ＤＦ─２快门特殊故障检修一例李令东说明：海鸥ＤＦ故障现象一般比较明显，也较容易排除。今遇一特殊故障，但在熟悉工作原理的情况下，采用“逐层分析”的方法，排除了故障涸此有感而书文于读者共享。故障现象：快门后帘不复位，反光镜翻不下，卷片扳手扳不动。拆修... Seagull DF ─ 2 shutter special troubleshooting a case Li Lingdong Description: Seagull DF fault phenomenon is generally more obvious, but also easier to rule out. In the case of a special failure, but familiar with the working principle of the case, the use of “layer by layer analysis” method, ruled out the trouble dry up and the book shared in the reader. Symptom: the shutter does not reset after the curtain, the mirror can not turn down, volume wrench can not move. Overhaul ...