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Yahoo!奇摩知識+ - 分類問答 - 視聽娛樂 - 發問中
Yahoo!奇摩知識+ - 分類問答 - 視聽娛樂 - 發問中 
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電動銀幕下降時超過下限
Nov 26th 2013, 20:00

如題
教會的電動銀幕(Da-lite)在下降時會發生超過原本設定下限之問題
也就是說
原本銀幕下降至一定長度則停
但現在的問題是過了下限還會自己往下降
造成投影機畫面會投射在白色區塊上方的黑布上
需要將銀幕重新上升後再下降一次才會改善

是管軸鬆掉所引起的嗎?

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