Samsung SMH1816 XAA Series Fast Track Troubleshooting page 3

CN301
Gas Sensor
CN701
Membrane Sw
CN401 Door Connector
1 Door sw 12vdc
3 Door sw
4 Gnd
5 Hood TCO
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 flange.
SMH1816
Main PCB
RY203 MW
Power Low
RY202 MW
Power High
2/17/2012
RY204
Main
Relay
RY209
Vent
High
RY210
Vent
Mid RY201
In Rush
The fuses are 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
monitor switch failure, replace the primary interlock
switch, secondary 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.
RY205
Night
RY206
Relay
Bright
Relay
RY207
TT
CN201 Power
1 Line 1
3 Main
5 Cook top lamp
7 TT
CN02 Pwr & Relay
3-(CN201-1) Vent High
5-(CN201-1) Vent Mid
7-(CN201-1) Vent Low
9-(CN201-1) Vent boost
11-(CN201-1) In rush
RY211
RY212
Vent
Vent
Low
Boost
3