FLAT BED IMAGE SCANNING SECTION
THEORY OF OPERATION
GR3770 3 - 4
TIMING CHART OF IMAGE SCANNER POSITION DETECTION
(1) When the image scanner is held close to the ADF read-in position:
(2) When the image scanner is in the image scanner ADF shading sensor position:
(3) When the image scanner is held between the image scanner home position sensor and the image
scanner ADF shading sensor:
Power ON or
scanner table Set SW ON
Further moved to stop position
Image scanner
home position sensor
Image scanner
ADF shading sensor
Flat bed read
pulse motor
Light receiving
HP direction
<2>
<1>Max3s
Light
receiving
Scanning
direction
Cut off
OFF
OFF
1 mm
3 mm
200 ms
ON
100% speed
Image scanner
ADF shading sensor
Flat bed read
pulse motor
Scanning
direction
HP
direction
Cut off
ON
OFF
1 mm
3 mm
200 ms
100% speed
Image scanner
home position sensor
Image scanner
ADF shading sensor
Flat bed read
pulse motor
<2>
Cut off
OFF ON
OFF
3 s
100% speed 68% speed
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