2 ms·
I wonder how this happened. I repaired two (consumer-grade) microwaves, and both of them had 3 independent switches: - one was sending signal to controller -
by theamk 5y ago
I wonder how this happened. I repaired two (consumer-grade) microwaves, and both of them had 3 independent switches:
- one was sending signal to controller
- second was cutting power to something (presumably magnetron) when released
- third was short-circuiting magnetron when released, it would cause fuse to blow if it ever got energized
I assume the mechanical parts were aligned such that if you open a door, the second switch was released before the third one.
- tinus_hn 5y agoThe point of the design is that firstly if you try to defeat the interlock you will cause a short circuit, unless you carefully activate the switches in the proper order as the door would, and secondly a programming or other fault in the controller can never activate the magnetron with the door open.