Canon FY8-13EX-000, NP6218 service manual C. Basic Sequence of Operations 2 copies continuous, AE

CHAPTER 2 BASIC OPERATION

C. Basic Sequence of Operations (2 copies continuous, AE)

Power switch	Copy Start key
ON	ON

STBY	INTR	SCFW	SCRV	SCFW	SCRV	LSTR	STBY
		AER
Main motor (M1)
Fixing heater
Primary charging bias
Transfer bias
Static eliminator bias
	1.5sec
Scanning lamp
Scanner
Developing AC bias
Developing DC bias
	Figure 2-103

		Period	Description	Remarks
STBY (standby)	•	Between when LSTR is over and	Until the Copy Start key	• Upon completion of
		when the Copy Start key is	or another operation key	LSTR, the indications on
		pressed or the Power switch is	is pressed.	the control panel return
		pressed.		to indications for stan-
	•	Between when the Power switch		dard mode after 2 min.
		has been pressed and when the
		Copy Start key is pressed.
INTR	For at least 1 sec after the Copy		The drum sensitivity is
(initial rotation)	Start key has been pressed.		stabilized in preparation
			for a copy run.
AER			The scanner is moved	AE mode only.
(AE rotation)			about 65 mm forward and
			in reverse to measure the
			density of the original.
SCFW	While the scanner is moving for-		The scanning lamp illumi-
(scanner forward)	ward.		nates the original, and the
	•	The distance of forward travel	reflected optical image is
		varies depending on the cassette	projected on the photo-
		size and reproduction ratio.	sensitive drum through
	•	The distance of reverse travel	mirrors and lenses.
		varies depending on the selected
		reproduction ratio.
SCRV	While the scanner is moving in		The scanner is returned	The registration signal is
(scanner reverse)	reverse.		to the home position in	generated to move the
			preparation for the next	copy paper to the transfer
			copy run.	assembly.
LSTR	Between when SCRV is over and		The surface of the photo-	The last copy is
(last rotation)	when the copy paper moves past the		sensitive drum is cleaned	discharged.
	delivery sensor.		using static electricity as
			post treatment.

Table 2-101

COPYRIGHT © 1997 CANON INC. CANON NP6218 REV. 0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON) 2-3