Hi.
Yesterday, my DEFY microwave oven model DMO367 MWM 2030W fried its magnetron, and the silver-coated waveguide cover that clips into the cavity inlet slot.
Beautiful orange corona discharge through the w/g cover, melodious 50 Hz arcing heard, pleasant aroma of burnt ceramic.
The micros I've worked on in the past had one screw on the magnetron top to remove the light box / cover, the bottom part having a hooked tab that lifts out once top is loose.
This one, however, has two dome-head star screws, one on top of 700W magnetron, near the mag's thermal cutout, and the other (jammed solid) underneath the magnetron.
So far, I've managed to loosen the hex-head star screw at R/H side of the mag, but left of mag still stuck.
Suspect there's another HH star screw hidden behind lightbox cover, securing the magnetron's 'left wing'.
Has anybody worked on this model or similar type before?
Do I need to remove the lightbox cover to access a hidden screw?
.....
Jackhammer, acetylene torch, sledgehammer??
Thanks, Clive.
VV
Update:
The first time it arced, I had a pie in its aluminium foil dish, both inside the paper packet.
Didn't check first that metal was present - could it have arced through the paper? (no burns).
As the magetron arced the second time I tested it, maybe it still works?
I'm wondering if the burnt oval of silvered ceramic waveguide now creates a short?
Some mugshots below..
Yesterday, my DEFY microwave oven model DMO367 MWM 2030W fried its magnetron, and the silver-coated waveguide cover that clips into the cavity inlet slot.
Beautiful orange corona discharge through the w/g cover, melodious 50 Hz arcing heard, pleasant aroma of burnt ceramic.
The micros I've worked on in the past had one screw on the magnetron top to remove the light box / cover, the bottom part having a hooked tab that lifts out once top is loose.
This one, however, has two dome-head star screws, one on top of 700W magnetron, near the mag's thermal cutout, and the other (jammed solid) underneath the magnetron.
So far, I've managed to loosen the hex-head star screw at R/H side of the mag, but left of mag still stuck.
Suspect there's another HH star screw hidden behind lightbox cover, securing the magnetron's 'left wing'.
Has anybody worked on this model or similar type before?
Do I need to remove the lightbox cover to access a hidden screw?
.....
Jackhammer, acetylene torch, sledgehammer??
Thanks, Clive.
VV
Update:
The first time it arced, I had a pie in its aluminium foil dish, both inside the paper packet.
Didn't check first that metal was present - could it have arced through the paper? (no burns).
As the magetron arced the second time I tested it, maybe it still works?
I'm wondering if the burnt oval of silvered ceramic waveguide now creates a short?
Some mugshots below..
Last edited: