Read Sharp AR-CF2 (serv.man2) Service Manual online
AR-CF2 ELECTRICAL SECTION 9 - 6
(3) Motor Drive Circuits
<1> Paper Feed Motor Drive Circuit (K_MOT)
This circuit rotates/stops K_MOT and controls its rotational direction
and the motor current. The circuit consists of the CPU (IC6), the D/A
converter (IC13), the constant-current chopper driver IC (IC9), and
other elements.
and the motor current. The circuit consists of the CPU (IC6), the D/A
converter (IC13), the constant-current chopper driver IC (IC9), and
other elements.
The signals of the stepping-motor drive excitation pattern from the
CPU (IC6-Pin37,38,70,71) control the motor rotation speed and rota-
tional direction.
CPU (IC6-Pin37,38,70,71) control the motor rotation speed and rota-
tional direction.
The analog signal from the D/A converter (IC13-Pin11) is divided into
the constant voltage by R53 and R54. The divided voltage is applied to
IC9-Pin9,11 to set the motor current.
the constant voltage by R53 and R54. The divided voltage is applied to
IC9-Pin9,11 to set the motor current.
<2> Reverse Motor Drive Circuit (H_MOT)
This circuit rotates/stops H_MOTand controls its rotational direction
and the motor current. The circuit consists of the CPU (IC6), the D/A
converter (IC13), the constant-current chopper driver IC (IC7), and
other elements.
and the motor current. The circuit consists of the CPU (IC6), the D/A
converter (IC13), the constant-current chopper driver IC (IC7), and
other elements.
The signals of the stepping-motor drive excitation pattern from the
CPU (IC6-Pin118, 120, 121, 122) control the motor rotation speed and
rotational direction.
CPU (IC6-Pin118, 120, 121, 122) control the motor rotation speed and
rotational direction.
The analog signal from the D/A converter (IC13-Pin5) is divided into
the constant voltage by R74 and R75. The divided voltage is applied to
IC7-Pin3,14 to set the motor current.
the constant voltage by R74 and R75. The divided voltage is applied to
IC7-Pin3,14 to set the motor current.
<3> Transport Motor Drive Circuit (Y_MOT)
This circuit rotates/stops Y_MOT and controls its rotational direction
and the motor current. The circuit consists of the CPU (IC6), the D/A
converter (IC13), the constant-current chopper driver IC (IC8), and
other elements.
and the motor current. The circuit consists of the CPU (IC6), the D/A
converter (IC13), the constant-current chopper driver IC (IC8), and
other elements.
The signals of the stepping-motor drive excitation pattern from the
CPU (IC6-Pin97, 98, 101, 102) control the motor rotation speed and
rotational direction.
CPU (IC6-Pin97, 98, 101, 102) control the motor rotation speed and
rotational direction.
The analog signal from the D/A converter (IC13-Pin6) is divided into
the constant voltage by R76 and R77. The divided voltage is applied to
IC8-Pin3,14 to set the motor current.
the constant voltage by R76 and R77. The divided voltage is applied to
IC8-Pin3,14 to set the motor current.
Not Mounted
Paper Feed MOT
Not Mounted
Reverse MOT
Not
Mounted
Mounted
Horizontal
Transport MOT
Transport MOT
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