Chapter 22-20F-2-31[1] ADF controller PCB[2] Current detection circuitM4: separation motorMI2: separation motor clock sensorWhen the CPU sends the motor rotation speed signal (SPPWM), the separation motor (M4) starts to rotate in a specific direction. The separation motor clock sensor(PI2) sends the separation motor rotation speed signal (SPCLK) to IC17 (speed control IC). In response, IC17 compares the arriving rotation speed signal againstthe speed reference signal (SEPCLKREF) from the CPU, and sends the result as the speed control signal (SPMFV) to the CPU. Using the arriving speed controlsignal, the CPU varies the rotation speed signal. LED3 goes on when the motor rotation speed is within a specific range, while going off if out of the range. Thecurrent detection circuit monitors the current flowing in the separation motor; when the level of the current exceeds a specific value, it sends the separation motorstop signal (SPLIM) to stop the motor. The CPU identifies a fault in the separation motor if the separation motor stop signal continues, indicating an error code(E405) on the host machine's display.Error code: E405- fault in the separation motor (M4)- fault in the separation clock sensor (PI2)- fault in the ADF controller PCB2.4.7 Sequence of Operations 0011-2347Picking Up/ Separation OriginalsF-2-322.5 Document Feeding/Delivery2.5.1 Outline 0011-2385Originals are moved by rotating the feeding belt by the belt motor (M2). Further, originals are moved either to the right or to the left depending on the operatingmode in question.Originals are delivered by rotating the delivery motor (M5). Originals are always delivered to the original delivery tray.M4SPLIMSPPWMSPCLKSEPCLKREFSPMFV+24R+5VJ12J8PI 2 IC18CPUQ28Q29LED3IC16125Start key ONOriginal sensor (S6)Pickup roller homeposition sensor (PI 7)Pickup roller heightsensor 1/2 (PI 8/9)Pickup motor (M3)Separation motor (M4)Separation clutch (CL)Separation sensor (S4)Skew sensor (S5)UP DOWN UP UPDOWNPicking up/separating1st originalPicking up/separating2nd originalEndPickup roller shiftingto home positionFeeding/SeparationPickupposition Waitposition Pickupposition Waitposition Home position
