Samsung R1031GWS YLR Service Manual page 22

8-2-7. Checking The Tacho Part
Have The Motor Turn In Hand
Is The Rectangular
Check The Surroundings
NO
Curve In The Micom
Circuit And TR11
21,10th ?
YES
Exchange The Motor
+5V
MICOM
R27 4.7K
R23
TR11
R22 1K 21
KN3904
C14 C17 C24
21