원문 게시자: jayeff ,
Hi, Here is a link to what the probable cause of your problem is. I realize that it is for a different model but in essence it most probably will be the same for yours. http://mytrimbleprotected.com/knowledge/docushare/retrieve?handle=File-775765. As I cannot find a service manual online for your device, you may have to contact a dealer for advice on what you can do. Here is a contact link. http://www.spectraprecision.com/eng/dealer-locator/ Hopefully this is of some help.