Basic Sequence Of Operations - Canon GP605 Service Manual

B.

Basic Sequence of Operations

• book mode, 1 original
· Lamp performance measurement
· Heating
Main power
switch ON
Fluorescent lamp
heater (H5)
Scanning lamp pre-
heat voltage
Scanning lamp
(FL1)
Shading correction
Scanner motor (M5)
Scanner HP sensor
(PS1)
Image leading edge
signal (ITOP)
If not at HP, HP search.
1) HP search at power-on
2) Shading correction position
3) Pre-scanning
(speed used at 50% reduction)
4) Original scanning
(book mode)
4) Original scanning
(ADF mode; stream reading)
4) Original scanning
(ADF mode; stream reading)
COPYRIGHT © 1999 CANON INC.
[1] In book mode, turns on as soon as the original size is found.
[2] In ADF mode, turns on as soon as an original is placed in the ADF.
Control panel
power
switch ON
Original set
SLEEP WMUP WMUPR
Controlled
70˚C
to 70˚C
Initial activation
OFSET
HP search
Reading the standard white plate.
Figure 3-103 Basic Sequence of Operations
HP
Scanner HP sensor
52.5 mm
Figure 3-104 Scanner Movement
CANON GP605/605V REV.0 JAN. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 3 ORIGINAL EXPOSURE SYSTEM
Copy Start
If for scanning two or more pages, kept on
key ON
also in reverse to stabilize light intensity.
STBY INTR SCFW
1.5 sec
GAIN
1st page image
leading edge
Synchronizing in sub scanning direction.
Image leading edge
Image leading edge sensor
Original
185 mm
Small-size position
(less than 216 mm long)
385 mm
LSTR STBY
SCRV
Controlled to 70˚C
Large-size position
(216 mm or longer)
3-3