Canon Color Image Reader-F1 Service Manual page 28

2
Technology > Controls (ADF) > Document Detection > Mixed width document size detection
The following table shows the relationship among length detection sensor signals,
document widths, and initial document sizes.
Document width detection Document length
detection
Detection by A4R/LTRR Document
document width identification length
volume (VR1) (mm) sensor sensor 2
(SR8) (SR10)
W > 289(AB/INCH) - OFF
- OFF
W>283(AB/K)
- ON
- ON
W>272(AB/INCH) - OFF
- OFF
W>263(AB/K)
- ON
- ON
W>247
- OFF
- OFF
- ON
- ON
W>200 OFF OFF
OFF
ON
ON
ON OFF
OFF
ON
ON
W>172 - OFF
- OFF
- ON
- ON
W>138.5 OFF OFF
OFF
ON
ON
ON OFF
OFF
ON
ON
2 Technology > Controls (ADF) > Document Detection > Mixed width document size detection
Detected size
Document AB AB/K Inch
length system system system
sensor 1
(SR7)
OFF A4 A4 LTR
ON A3 A3 LDR
OFF A3 A3 LDR
ON A3 A3 LDR
OFF A4 K16 LTR
ON A3 K8 LDR
OFF A3 K8 LDR
ON A3 K8 LDR
OFF B5 B5 LTR
ON B4 B4 LDR
OFF B4 B4 LDR
ON B4 B4 LDR
OFF A5 A5 STMT
ON (A5) (A5) LGL
OFF A4R A4R LTRR
ON (A4R) (A4R) LGL
OFF A5 A5 STMT
ON (A5) (A5) LGL
OFF A4R A4R LTRR
ON (A4R) (A4R) LGL
OFF B6 B6 STMT
ON (B6) (B6) LGL
OFF B5R B5R LTRR
ON (B5R) (B5R) LGL
OFF A5R A5R STMT
ON (A4R) (B4) STMT
OFF (A5R) (A5R) STMT
ON (A4R) (B4) STMT
OFF A5R A5R STMT
ON (A4R) (B4) STMT
OFF (A5R) (A5R) STMT
ON (A4R) (B4) STMT
T-2-8
■ Mixed width document size detection
The document of the most wide width doing mix width document detects it in document
width volume (VR1) and A4R/LTRR identification sensor(SR8), and the other document
width detect it in document width sensor(SR12/13/14/15).
The size of the transportation direction calculates paper length by the ON time for read
sensor.
Distinguish different manuscript size by the volume and the combination of the sensor.
SR10
SR8
SR15
SR14
SR13
SR12
SR2
2-17
SR7
VR1
F-2-30
2-17