オリジナル投稿者： Fer Callado ,
There’s a wire inside the top cover. It links the speed dial with another dial and a spring located in the left side under the rewind lever. It it’s either broken or loose (spring tension is lost or it went out from the pulleys) the speed will always go to infinity and the mirror wont come down until reseting the signal. You have to replace the wire if broken or set it tight again if its loose.