won't heat up anything, i found an online service manual and took the unit apart. test #1 said to check current at the magnatron. so as instructed i connected a digital volt, ohm amp meter in series between 1 lead and the open terminal of the magnatron set to 20 amps AC put a container full of water in and ran for 1 minute. i was supposed to read 1-1.7 amps for 23 seconds untill unit throws an F7 code. i was reading about 4.5 -2 amps during this test, got the code.
ran test 2 by unplugging CN65 supposed to read .4-.8 amps and after 3 seconds get F7 code,
the unit ran and ran for as long as i wish, throwing with no code and reading 0.00 amps during this test.
both tests failed and manuel suggests a new inverter in both cases. seems these are very common to go out on these units.
what i dont get is why did i read higher amps when running normally? i would asume the higher amps would indicate more power going to the magnatron. the microwave will heat a cup of water after 2 minutes that is warm to the touch. so i know somthing is happening.
the magnatron tested to read 0 ohms on my meter so i assume it is good according to the manuel should read less then 1 ohm.
am i on the right track? do you think i need a new inverter board? what is the common failure cause and symptoms?
can you repair my board so it won't fail or should i just get a new one?
i removed the invertor and i see no issues with poor contacts. does it have anything to do with its output frequency?. would i still get readings despite them being a little high and non existant durnong these tests?
i also checked the magnatron thermister as well as thermal breakers and all check good. the only thing i cannot directly check is the inverter. but i read a post here that said sometimes a magnatron can check ok but still be bad.,i hate to order the wrong 110.00 part.,