In this MFP, for document size detection, two reflecting sensors are used for the sub scanning direction, and a CCD is used for the main scanning direction.

Sub scanning direction

The document size is detected by the ON/OFF states of the sensor (the CCD can also detect the length). The pressure plate open/closed sensor is used for document size detection timing. When the pressure plate open/closed sensor has changed from "no cover" to "cover," the size is detected.

Main scanning direction

RGB color densities at 3 locations (S1, S2, S3) are detected by a CCD, and when any of the RGB densities is 12 digits or more, it is determined that a document is present.

The pressure plate open/closed sensor is used for document size detection timing. When the pressure plate open/closed sensor detects "no cover," the scanner lamp is moved to the right; when it detects "cover," the scanner lamp is moved to home position while lit, and during this time, the size is read.

Document size

Sensor response

Size

Direction

Dimensions

(main × sub)

S1

S2

S3

L1

L2

A3

SEF

297x420

-

-

B4

SEF

257x364

-

-

A4

SEF

210x297

-

-

-

A4

LEF

297x210

-

-

-

-

B5

SEF

182x257

-

-

-

-

B5

LEF

257x182

 

-

-

-

A5

SEF

148x210

-

-

-

-

-

A5

LEF

210x148

-

-

-

-

B6

SEF

128×182

-

-

-

-

-

B6

LEF

182×128

-

-

-

-

-

DLT

SEF

11"×17"

-

-

-

10×15

SEF

10"×15"

-

-

-

USB4

SEF

10"×14"

-

-

-

LG

SEF

8 1/2"×14"

-

-

-

Oficio

SEF

8 1/2"×13.4"

-

-

-

Foolscap

SEF

8 1/2"×13"

-

-

-

Folio

SEF

8 1/4"×13"

-

-

-

F

SEF

8"×13"

-

-

-

LT

SEF

8 1/2"×11"

-

-

-

LT

LEF

11"×8 1/2"

-

-

-

-

8×10

SEF

8"×10"

-

-

-

10×8

LEF

10"×8"

-

-

-

-

Executive

SEF

7 1/4"×10 1/2"

-

-

-

-

HLT

SEF

5 1/2"×8 1/2"

-

-

-

-

-

HLT

LEF

8 1/2"×5 1/2"

-

-

-

-

8kai

SEF

267×388

-

-

-

16kai

SEF

194×267

-

-

-

-

16kai

LEF

267×194

-

-

-

-

  • The document width (main scanning direction) is detected by the sensor indicated with ‘’.

How to check the sensor state
  • SP4-301 (Operation Check APS Sensor)
    How to read the screen
    (7)00000000(0)
    0: no document
    1: document present
    When the sensor responds, bit 0 is displayed as "1."
  • SP4-310 (Scan Size Detect Value)
    Viewed from the control panel, labeling positions from rear to front S1-S3 in that order, the RGB density at each position is displayed in digit units (the value just before scan is displayed).
Other
  • SP4-303 (Min Size for APS)
    Sets the display when non-standard (small size) size original is detected.
    0: Display message "Original size unknown".
    1: Operate assuming the original size is A5 LEF (HLT LEF for inches).
  • SP4-305-001(8K/16K Detection)
    By changing this SP, you can change between A4 size/letter size or Chinese paper size (8×16).
    0: Normal setting. (Default)
    1: When detecting A4/LT size -> Assume that it is A4 when SEF, LT when LEF.
    2: When detecting A4/LT size -> Assume that it is LT when SEF, A4 when LEF.
    3: Change to 8K/16K settings.
    A3, B4 -> 8K LEF
    A4 LEF, B4 LEF, A5 LEF -> 16K LEF
    A4 SEF, B4 SEF, A5 SEF -> 16K SEF
  • SP5-126 (Set F-size Document)
    Selects the paper size for the F-size original.
    0: When detecting Foolscap -> Assume that the size is 8 1/2"x13". (Default)
    1: When detecting Folio -> Assume that the size is 8 1/4"x13".
    2: When detecting F -> Assume that the size is 8"/13".
  • SP4-308 (Scan Size Detection)
    Sets CCD original size detection and APS original size detection.
    0: Disable: Does not detect original size
    1: Enable: Detects original size with the CCD unit
    2: APS: APS sensor is used for detecting original size. (Do not select this option because this is for special order.)
  • SP4-309-004 (Scan Size Detect:Setting LED PWM Duty)
    If the user specifies that the pre-scan lamp is too bright, the brightness pre-scan can be reduced by decreasing the value of SP4-309-004 (Scan Size Detect:Setting LED PWM Duty). However, if the lamp brightness is reduced, size detection for a document with a large number of solid images will be less accurate.
  • SP5-135 (LG_Oficio Change)
    1: When detecting LG size -> Assume that the size is 8 1/2"x14".
    2: When detecting Oficio size -> Assume that the size is 8 1/2"x13.4". (Default)