Dc Spindle Motor Driving Circuit Block Diagram - Fujitsu M2301B Manual

Q:I
Hall-Effect
Elements
DC MOTOR
CMP
DCMCNT
From DC Motor Controller
HC2
HC3
DEC
GATE
circuit
+24V
A
C
DC Spindle Motor
+24V RTN
Note: DCMCNT is the signal which controls the speed of the DC
spindle motor.
When DCMCNT is logical "1". it blocks current to the motor.
When DCMCNT is logical "0". it permits the current to flow.
Fig. 4.10 DC Spindle Motor Driving Circuit Block Diagram