• ** REMEMBER! **The microwave can still shock you even unplugged!!

    ALWAYS discharge the high-voltage capacitor first if you even think your hands will come close to any HIGH VOLTAGE components.

    Jeff mentions this: Anything in the high voltage ( magnetron, capacitor, diode, wires to and from ):
    ...Use a metal ( not the shiny chrome type ) screw driver with a insulated handle to short across ( touch both at the same time ) the terminals of the high voltage capacitor to discharge it.

    From Jeff's site: http://www.applianceaid.com/component-testing.php

    Jake

FIXED How access magnetron in samsung SMH9187B microwave

Itchy8

Premium Member
Joined
Apr 19, 2014
Messages
4
Location
Virginia
Model Number
SMH9187B
Brand
Samsung
Age
1-5 years
Microwave completely dead, power source and 2 20 A fuses are fine. Suspect thermal cutout and magnetron fried. What do I do now?
 

jeff1

Appliance Tech - Moderator
Staff member
Joined
Oct 10, 2004
Messages
24,008
Location
Ontario, Canada
Hi,

I found SMH9187B/XAA

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

WLPmicro-450.jpg

Pull the unit down, remove outer cabinet to access.

50034945-00001.jpg

jeff.
 

Itchy8

Premium Member
Joined
Apr 19, 2014
Messages
4
Location
Virginia
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

Appliance Tech - Moderator
Staff member
Joined
Oct 10, 2004
Messages
24,008
Location
Ontario, Canada
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

Premium Member
Joined
Apr 19, 2014
Messages
4
Location
Virginia
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

Appliance Tech - Moderator
Staff member
Joined
Oct 10, 2004
Messages
24,008
Location
Ontario, Canada
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... Magnetron-6324W1A001H-01359863.jpg

jeff.
 

Itchy8

Premium Member
Joined
Apr 19, 2014
Messages
4
Location
Virginia
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
 
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