Specifications

8.8 FEED-OUT MOTOR CIRCUIT
The DF CPU sends the speed data (high or low) to the driver IC and the
motor drive circuit. The motor drive circuit creates the PWM signal and sends
the motor drive pulses to the feed-out motor.
The frequency generator of the feed-out motor makes a very low voltage ac
current which is fed back to the driver IC. The driver IC monitors the
frequency of this ac current and based on the frequency it regulates the
motor speed.
DF Main Board (PCB 1)
CPU
CN104-A2
High/Low
Regulation
FG
Driver
Drive
Circuit
IC
ON/OFF
AC Feedback
CN104-A15
Voltage
CN104-B8
CN104-A12
Motor
Feed-out
Motor
1 December 1990
8-19