MX-PNX1C (serv.man12). Section 10 - Electrical Section . - Sharp Copying Equipment Service Manual (repair manual). Page 5

MX-FNX1/MX-PNX1  ELECTRICAL SECTION  10 – 5

This circuit controls rotation/stop and the rotating direction of the staple shift motor (FSM) and the motor current, and is composed of the
CPU (IC10), the DA converter (IC11), and the constant-current chopper system driver IC (IC4). The motor rotating speed and the rotating
direction are controlled with the stepping motor drive excitement pattern signal (ST_MOT_PA, PB, EA, EB) outputted from the CPU (IC10-
45, 46, 47, 48pin).
The analog signal (ST_MOT_REF) outputted from the DA converter (IC11-18pin) is divided into a certain voltage with R64 and R65. The
divided voltage is inputted to IC4-3, 4pin to set the motor current value. The logic of the standby signal (MOT_STY) outputted from the DA
converter (IC11-7pin) is H when the motor can be operated (READY).

5)

Alignment motor F (FFJM) drive circuit

6)

Alignment motor R (FRJM) drive circuit

This circuit controls rotation/stop and the rotating direction of the alignment motor F (FFJM) and the motor current, and is composed of the
CPU (IC10), the DA converter (IC11), and the constant-current chopper system driver IC (IC17). The motor rotating speed and the rotating
direction are controlled with the stepping motor drive excitement pattern signal (J1_MOT_PA, PB, EA, EB) outputted from the CPU (IC10-
49, 50, 51, 52pin).
The analog signal (J1_MOT_REF) outputted from the DA converter (IC11-19pin) is divided into a certain voltage with R125 and R126. The
divided voltage is inputted to IC17-3, 4pin to set the motor current value. The logic of the standby signal (MOT_STY) outputted from the
DA converter (IC11-7pin) is H when the motor can be operated (READY state).
This circuit controls rotation/stop and the rotating direction of the alignment motor R (FRJM) and the motor current, and is composed of the
CPU (IC10), the DA converter (IC11), and the constant-current chopper system driver IC (IC18). The motor rotating speed and the rotating
direction are controlled with the stepping motor drive excitement pattern signal (J2_MOT_PA, PB, EA, EB) outputted from the CPU (IC10-
53, 54, 55, 56pin).
The analog signal (J2_MOT_REF) outputted from the DA converter (IC11-2pin) is divided into a certain voltage with R127 and R128. The
divided voltage is inputted to IC18-3, 4pin to set the motor current value. The logic of the standby signal (MOT_STY) outputted from the
DA converter (IC11-7pin) is H when the motor can be operated (READY state).

Alignment motor F (FFJM)

Not
installed

Not installed

Alignment motor R (FRJM)