This is used to shut off the handpiece when you put it down on the holder=20 ----- Original Message ----- From: "Justin Richards" =20 To: "Microcontroller discussion list - Public." =20 Sent: Thursday, July 28, 2016 2:47:30 AM=20 Subject: [EE]: Hot air station 998D keeps cutting out=20 I just destroyed a 15" transducer so with nothing to lose decided to try=20 and dis-assemble and maybe repair.=20 I started to use a hot air station but it seemed every time I pointed the=20 gun downwards it cut out.=20 Dismantled the hand piece several times finding nothing obvious but noticed= =20 a reed switch and pondered its presence.=20 Finally it dawned on me that it was cutting out in the presence of the=20 magnetic field.=20 Anyone have any clues as to why there is a reed switch glued to the inside= =20 of the handle.=20 Justin=20 --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive=20 View/change your membership options at=20 http://mailman.mit.edu/mailman/listinfo/piclist=20 --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .