Canon FY8-13FW-000DADF-A1 Service Manual
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COPYRIGHT © 1998 CANON INC. CANON DADF-A1 REV.0 DEC. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 2-45CHAPTER 2 BASIC OPERATIONJ. Controlling the Belt Motor1. OutlineFigure 2-268 is an outline diagram of the belt motor control circuit.The belt motor is a DC motor.The microprocessor (Q1) on the DADF controller PCB sends the belt motor drive signal(BMON), belt motor rotation direction signal (BDIR), and belt motor rotation speed control signal(BMPWM) to the drive circuit.When the belt motor starts to rotate, the belt motor clock sensor (S10) sends the belt motor clocksignal (BCLK1) to the microprocessor (Q1). In response, the microprocessor (Q1) compares the beltmotor clock signal (BCLK1) against the rotation speed stored in memory to vary the belt motorrotation speed control signal (PMPWM) to make a match, causing the belt motor (M3) to rotate at aspecific speed at all times.Figure 2-268Belt motorclock sensorDADF controller PCBBelt motorDrivecircuitJ7-1J7-2J9-B4S10M3Q1CPUBMONBDIRBMPWMBCLK1 |
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