Canon PC400 Service Manual - Page 46
Table 3-101B, Forward, Reverse
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Continuous copying CHAPTER 3 EXPOSURE SYSTEM Copyboard position sensor (Q902) Forward Reverse Description • Copyboard is at the home position. • Copyboard solenoid goes ON in response to a press on the Copy Start key or insertion of copy paper. Copyboard position (cams) Reversal cam Registration cam Start position cam Reverse Copyboard position sensor lever Copyboard position sensor (Q902): OFF (front view) • Copyboard is at the start position. • Copyboard drive solenoid goes OFF. • Scanning lamp ON. • The copyboard drive solenoid goes ON about 0.5 second after the Copy Start key is pressed. • AE measurement starts. • Registration roller goes ON (by registration cam). • Copyboard is at the reversal position. • Copyboard drive solenoid goes OFF. • After a specific period, copyboard drive solenoid goes ON. • Pick-up solenoid goes ON (continuous copying). • Scanning lamp OFF. • For the last copy, the copy board drive solenoid goes OFF at the copyboard home position. Q902:ON Forward Q902:OFF Q902:ON © OFF Q902:ON © OFF Table 3-101B 3-2 COPYRIGHT © 1998 CANON INC. CANON PC400/420/430,FC200/220 REV.0 JAN.1998 PRINTED IN JAPAN (IMPRIME AU JAPON)