Magnetron Does Not Work
Does continuity exist between the HV
transformer black wire and power cord with primary interlock closed (door closed)?
Yes
Does continuity exist between the HV
transformer blue wire and secondary
blue wire thru HV transformer fuse?
Yes
Does continuity exist between the secondary
Yes
Does continuity exist between the HV transformer white wire to power cord thru secondary interlock - 1 (door closed) and monitor interlock switch open (door closed)?
Yes
Replace the main control board.
Does the magnetron work?
No
Replace the HV capacitor.
Does the magnetron work?
No
Replace the HV transformer.
Does the magnetron work?
No
Replace the magnetron.
Replace the primary interlock switch or repair
No 
faulty wiring between the HV transformer and the primary interlock switch.
No |
| Replace the HV transformer fuse or |
| repair faulty wiring. |
No | Repair faulty wiring. |
No | Repair faulty wiring. |
| 1 |
1 | - Red |
| 2 |
2 - White | |
3 - Blue | |
4 | - Black |
2
3 |
4
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