Samsung R1033GWC/YLW Service Manual page 21

8-2-6. Confirm The Driving Part Of Motor
Motor Is Not Spinning
Motor Is Not Turnning
Right And Left
Check The Tacho Part
COIL2
CM2
R71
NO
NO
BD1
COIL1
RELAY4
YES
YES
12V
CM1
R70
TRIAC1
D20
20
Check BD1, TRIAC1
Check RELAY4
IC 65003
R56
1W 300
MICOM
22
15