Chapter 77-8and the cassette pickup solenoid (SL202). When the main motor starts rotating, the interlocked relay gear also starts rotating. At this time, the pickup roller drivegear is not driven because its toothless portion is positioned at the relay gear and therefore these gears are not engaged with each other.1) The DC controller PCB issues a cassette pickup solenoid drive signal (CSTFD). When the solenoid is turned on, the control arm pushes the cam to rotate thepickup roller drive gear slightly.F-7-112) When the pickup roller drive gear is engaged with the pickup roller shaft gear, drive power is transferred to the pickup roller shaft gear and consequently thepickup roller starts rotating.F-7-123) When the feed roller drive gear is engaged with the feed roller shaft gear, drive power is transferred to the feed roller shaft gear and consequently the feed rollerstarts rotating.4) When the pickup roller rotates once, the toothless portion of the pickup roller drive gear comes to the position of the relay gear and consequently drive power ofthe main motor is not transferred, stopping the rotation of pickup and feed rollers.5) The picked up paper is fed to the registration roller through the vertical path roller.F-7-137.3.3 Cassette Paper Size Detection 0017-4388The size of the paper in the cassette is detected by the DC controller PCB when the user changes the position of the cassette paper size lever. When the cassette isinserted in the iR host machine, the paper size lever pushes the paper size switches provided in the iR host machine to allow the DC controller PCB to detect presenceof the cassette and the size of paper. Paper size switches are arranged as shown below. Paper sizes are determined by the combinations of the switches pushed bythe paper size lever.
