Dear Yasser,
I'm Mr.Samart, Assistant of Electrical Maintenance Manager. Mr. Phongthep has a long holiday. So, I'm continue handle the mention below. After they stop the line I have checked and clean all the windows. I attached relating pages for your detail. Also I found there are parts inside the lens of camera #3. I’m afraid to get trouble if I open the lens because I don't have procedure to correct it. So, I didn't do anything. After they ran the machine the troubles still appear.
We are a waiting for your help.