FIXED How access magnetron in samsung SMH9187B microwave

[Itchy8]

Model Number

SMH9187B

Microwave completely dead, power source and 2 20 A fuses are fine. Suspect thermal cutout and magnetron fried. What do I do now?

 

[jeff1]

Hi,

SMH9187B

I found SMH9187B/XAA

There are thermostats on the base, magnetron and top of the cooking cavity....



Pull the unit down, remove outer cabinet to access.



jeff.

 

[Itchy8]

Thanks Jeff,
Discovered reason for burnout of mv was repeated running without food in oven.(ostensibly being used as a timer). My guess is possible thermostat fried or next magnetron itself cooked! Would you agree?
Itchy8

 

[jeff1]

Check the thermostats for sure, esp the oven over heat thermostat at the top.

With any luck the thermostats worked before damaging the mag.

jeff.

 

[Itchy8]

Capacitor reads infinity and shows zero charge rate. Diode reads infinity in both directions. Oven thermostat reads open so these three items need replacement. My concern is in checking magnetron. Instructions say to be sure seal in properly seated. Not sure where and what this is. Also having some difficulty removing leads from magnetron terminal jack. Would like some advice re these issues before ordering parts.

 

[jeff1]

Capacitor reads infinity and shows zero charge rate. Diode reads infinity in both directions.

Using a needle meter or a digital? Most meters ( unless a very expensive one ) will not be able to check the diode anyways.

Oven thermostat reads open so these three items need replacement

Join the 2 wires together ( for testing only ) and recheck the unit.

Instructions say to be sure seal in properly seated. Not sure where and what this is

Unless the mag was removed, the seal will be in place. Brass coloured part is the seal...

jeff.

 

[Itchy8]

Eureka!! It works! All it needed was the $2.90 oven thermostat. Probably saved myself 297.10.
Thanks a million for your help Jeff. Will keep this blog repair site on my favorites list and will send a donation for its upkeep.

Ciao! Itchy8

 

[jeff1]

Thankx for the update

jeff.