Canon PC430 Service Manual - Page 81

CHAPTER 5 PICK-UP/FEEDING SYSTEM I. OUTLINE The pick-up roller starts to rotate when the Copy Start key is pressed in the case of the PC420/430/FC220 and when paper is inserted, i.e., in response to the activation of the pick-up sensor (Q131), in the case of the PC400/FC200. The copy paper is controlled by the registration roller so that its leading edge matches that of the image on the photosensitive drum; the paper is then moved to the transfer, separation, and fixing assemblies before it reaches the copy tray. The delivery of copy paper is monitored by the delivery sensor (Q801); if copy paper fails to reach or move past the sensor, the copier identifies the condition as a jam and flashes 'Jam' on the control panel. DC controller/DC power supply PCB Delivery sensor signal Main motor drive command (MMD) Pick-up sensor signal Pick-up solenoid drive command (PUSD) Registration solenoid drive command (RGSD) Pick-up sensor signal Control panel PCB M1 Main motor Fixing assembly Photosensitive drum Pick-up solenoid SL1 Pick-up clutch* Registration clutch* Registration roller Pick-up roller Delivery sensor (Q801) *Spring clutch Pick-up sensor (Q131) Registration Registration roller solenoid SL1 Registration clutch* M1 Main motor (PC400/FC200) Figure 5-101 Pick-up roller Pick-up sensor (Q131) COPYRIGHT © 1998 CANON INC. CANON PC400/420/430,FC200/220 REV.0 JAN.1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 5-1