Chapter 22-38e. Developing rotary motor driver IC (IC103)It controls the developing rotary motor.f. Toner cartridge motor driver IC (IC104)It controls the toner cartridge motor.g. Fixing motor driver IC (IC106)It controls the fixing motor.h. Engaging motor driver IC (IC107)It controls the engaging motor.i. Fan motor control circuitIt controls the cooling fan motor.2.6.2.3 Controlling the Motors and Fans 0011-6414The machine uses several motors, consisting of 5 DC motors and 4 stepping motors.Of the DC motors, one is used in the reader system, one for the image formation system, and two for the image formation/paper feed system, with the remainingone used as a fan motor serving to cool the inside of the machine. As for the stepping motors, 2 are used in the reader system, another 2 are used in the imageformation system.The machine is designed to deposit toners of different colors on its intermediate transfer belt. It is important that all these deposits fall at exact points, and minutechanges in the speed of motors can well cause displacement of resulting colors. The machine's DC motor used for image formation, for this reason, is controlled toan extremely high level of accuracy for its rotation speed.T-2-82.6.2.4 Main Motor Control 0008-1728This control is utilized to drive the main motor (DCM701).The DCM701, a three-phase, eight-pole DC motor with a built-in drive circuit, drives each roller used for paper feed and image formation.The DCNT Board drives the motor by controlling the MAIN MOTOR ACCELERATION (/MAIMACC) signal and MAIN MOTOR DECELERATION (/MAIM-DEC) signal.The illustration below shows the control circuit of the motor.Name Functions Type Direction ofrotationSpeed Fault detectionMain motor(DCM701)drives the following:multifeeder pickup roller,registration roller,photosensitive drum,secondary transfer roller,ITB, feed belt, holding plate,waste toner feedscrewDC motor normal 3-speedcontrolfull speed, 1/2 speedyesDevelopingrotary motor(DCM703)drives the developing rotary DC motor normal 1-speedcontrolyesFixing motor(PM702)drives the pressure roller,face-down delivery rollerDC motor normal 3-speedcontrolfull speed, 1/2 speedyesShift motor(PM704)locks and unlocks thedeveloping cylinder to andfrom the photosensitivedrum; locks and unlocks thememory tag contact (tonercartridge) and the machinecontactsteppingmotornormal/reverse 1-speedcontrolnoTonercartridgemotor(PM705)drives the developingcylinder, toner stirring platesteppingmotornormal 1-speedcontrolnoCooling fan(FM721)cools the areas near the fixingassembly, low-voltage powersupply, high-voltage powersupply, cartridgeDC motor - 1-speedcontrolyesDocument feedmotor(DCM706)drives the various rollers ofthe ADFsteppingmotornormal 1-speedcontrolnoFlatbed motor(DCM707)drives the CCD unit steppingmotornormal/reverse 1-speedcontrolnoReaderCooling fan(FM722)serves as the reader unitcooling fanDC motor - 1-speedcontrolno
