Toshiba e-studio550 Service Manual page 301

(3) Drive circuit for read motor
This circuit controls the rotation/stoppage and the direction of rotation, excitation mode and motor
current of the read motor.
A drive clock signal (RMOT_CLK) and rotation direction signal (CWB) are input to control the speed
and direction of the motor rotation. M1 and M2 are the exciting mode setting signals.
The PWM signal of RMOT_CU is separated and smoothed at R80, R76 and C91, and it is input into
IC10-7pin(Vref) to set the motor current value. The motor current value can be changed by altering
duties of the PWM signal.
(4) Drive circuit for feed motor
This circuit controls the rotation/stoppage, the direction of the rotation of the feed motor and the motor
current. The drive pattern signal is input into IC15-6, 7, 8, 9 to control the speed and direction of the
motor rotation.
The PWM signal is input into FMOT_CU and separated and smoothed at R89, R87 and C87, and it is
input into IC15-12pin (Vref) to set the motor current value. The motor current value can be changed by
altering duties of the PWM signal.
e-STUDIO550/650/810 RADF 16 - 64 JUNE 2002 © TOSHIBA TEC