Posted on 1 Comment

Combo Microwave

Electronics Bay
Electronics Bay

Here are the internals of a cheap Microwave/Convection Oven combo. Electronics bay is pretty much the same as a standard microwave, with the magnetron, transformer & diode/capacitor voltage doubler, with the addition of an extra fan & a pair of nichrome elements to provide the convection oven function.

Convection Fan
Convection Fan

Convection blower which keeps the cooking vapours & smoke away from the elements, & circulates the hot air around the cooking chamber. This is a 12v DC centrifugal type blower.

Convection Element
Convection Element

The elements are inside this steel shield, air duct extends from the centre.

Thermal Cutouts
Thermal Cutouts

This oven has a pair of thermal switches on the magnetron.

Capacitor & Diode
Capacitor & Diode

The usual capacitor/diode voltage doubler in the magnetron power supply. The transformer is visible to the left.

Controller
Controller

Electronic controller PCB. This has a pair of relays that switch the elements & the magnetron transformer.

1 thought on “Combo Microwave

  1. Hi when I want to use elements in the combine or convention states, after setting when I push the start key, the oven start for a very short moment like blinking and then stopped. What is the problem?

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.