Servo Control - Canon ZR70 MC A Service Manual

5-3 Servo Control

Servo control is carried out by the VIC3 (VIC and FR MI-COM). The FR MI-COM is used for servo control of motor ON/OFF and
rotational direction, and the VIC is used to output rotational speed and phase control signals. More specifically in terms of signal
flow, the VIC detects the FG/PG and PB-RF signals from the motor, and sends the detected signal information to the FR MI-COM.
Then, the FR MI-COM generates an error signal to be output to the VIC. Thereafter, the VIC outputs an error signal (PWM), which
is driven on the MAIN P.C.B. for sending a control voltage to the motor driver IC.
LOAD ON/
UNLOAD FR
DERR
CERR
VIC3
DA CFG
DA S REEL
DA T REEL
DC/DC
CONVERTER
LOAD+/LOAD-
U/V/W
IC1301
MO DRIVE
Ucoil/Vcoil/Wcoil
Fig. 2-13
2-17
ZR70 MC A, ZR65 MC A, ZR60 A
CHAPTER 2. TECHNICAL DESCRIPTION
DMC III
LOADING MOTOR
DRUM MOTOR
CAPSTAN MOTOR
CFG2
S REEL Hall SENSOR
T REEL Hall SENSOR