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CN301 Gas Sensor
3-4 5vdc
CN202 TT & Vent Low
1 TT Relay Neutral Contact
3 Vent Low Relay Neutral Contact
5 Vent high
7 N
CN201 Relay, Lamp, SMPS
1 Line 1
3 In Rush Relay Neutral Contact
5 Cook top lamp
9 Main Relay Neutral Contact
Door Interlock Ass'y
Microwave cover assembly
The front of the top cover has flanges that must fit inside the front frame and vent, and the bottom goes above the bot-
tom cover. Start with the left side and hold in place with one screw once engaged. Leave the display loose so you
can see that the right side is engaged properly. Then mount display and the vent, ensuring the vent engages the
SMH9187
Main PCB
RY209 Vent
Low Relay
CN401 Door Connector
1 Door switch
3 Door switch 12vdc
4 Hood TCO 5vdc
5 DC gnd
RY201 Main
Relay
RY208 TT
Relay
The fuse is located on the noise filter.
1. Disconnect power and remove grille and Assembly Control
Box.
2. Replace the fuse.
3. When 20A fuse blows out by the operation of interlock moni-
tor switch failure, replace the primary interlock switch, secon-
dary interlock switch, door sensing switch, interlock monitor
switch and power relay.
4. When the above four switches operate properly, check if any
other part such as the control circuit board, blower motor or
high voltage transformer is defective.
2/17/2012
RY202 In
RY206
Rush Relay
Bright Relay
RY203
Power
High Relay
RY204 Power
Low Relay
RY205
Night Relay
3
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