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3-7
Confidential
(1) ADF scanning: Document moves across stationary CIS unit
(Only for models with ADF)
Placing a document
face down
in the ADF activates the document front sensor, switching to ADF
scanning.
The CIS drive mechanism (details below) operates for each scanning command executed. First, the
CIS motor moves the CIS unit to the white reference film for white level compensation. Secondly,
the ADF motor rotates the document pull-in roller* to pull the document into the ADF. (*This roller
is added to this series of machines in order to pull in documents horizontally placed.) Thirdly, the
CIS motor again moves the CIS unit to the ADF scanning position.
The document separation roller feeds the pages one at a time,
starting from the bottom,
to the
document feed rollers (1 and 2), which rotate to move the page in a curve left, up, and right. The
page is scanned as it passes over the CIS unit. It then leaves the machine
face up
onto the ejected
document support section of the document guides. The machine ejects subsequent pages under this
one to preserve the document page order.
(2) Flat-bed scanning: CIS unit moves under stationary document
The user lifts the document cover, places a page (or open book)
face down
on the glass plate, and
closes the document cover.
The CIS drive mechanism (details below) operates for each scanning command executed. The CIS
unit first moves to the white reference film for white level compensation. It then moves right,
scanning as it goes. It returns to its home position after the scan.
CIS drive mechanism
The contact image sensor (CIS) unit rides along the CIS rail, driven by the CIS drive belt.
Clockwise motion of the CIS motor moves the unit to the right; counterclockwise motion, to the left.
This unit consists of the document illumination LED array, the lens array gathering the light
reflected from the scanned image, and the CIS PCB converting the light input to pixel data output.
Summary of Contents for MFC 685CW - Color Inkjet - All-in-One
Page 7: ...v Confidential ...
Page 8: ...vi Confidential ...
Page 9: ...vii Confidential ...
Page 10: ...viii Confidential ...
Page 11: ...ix Confidential Legal limitations for copying ...
Page 12: ...Confidential CHAPTER 1 PARTS NAMES AND FUNCTIONS ...
Page 18: ...1 5 Confidential ...
Page 19: ...1 6 Confidential ...
Page 20: ...1 7 Confidential ...
Page 23: ...1 10 Confidential ...
Page 30: ...Confidential CHAPTER 2 SPECIFICATIONS ...
Page 50: ...Confidential CHAPTER 3 THEORY OF OPERATION ...
Page 99: ...Confidential CHAPTER 4 ERROR INDICATION AND TROUBLESHOOTING ...
Page 152: ...Confidential CHAPTER 5 TRANSFER OF DATA LEFT IN THE MACHINE TO BE SENT FOR REPAIR ...
Page 156: ...5 3 Confidential Cover page sample End page sample ...
Page 157: ...Confidential CHAPTER 6 DISASSEMBLY REASSEMBLY AND LUBRICATION ...
Page 250: ...Confidential CHAPTER 7 ADJUSTMENTS AND UPDATING OF SETTINGS REQUIRED AFTER PARTS REPLACEMENT ...
Page 263: ...7 11 Confidential Head Positioning Test Pattern ...
Page 267: ...7 15 Confidential Paper Feeding Check Pattern for the Paper Feed Roller ...
Page 268: ...7 16 Confidential Paper Feeding Check Pattern for the Paper Ejection Roller ...
Page 270: ...7 18 Confidential Vertical Alignment Check Patterns 600DPI 1200DPI ...
Page 273: ...7 21 Confidential Margin Check Pattern ...
Page 288: ...Confidential CHAPTER 8 CLEANING ...
Page 292: ...Confidential CHAPTER 9 MAINTENANCE MODE ...
Page 300: ...9 6 Confidential Scanning Compensation Data List a b c d e f i ...
Page 303: ...9 9 Confidential Test Pattern ...
Page 308: ...9 14 Confidential Configuration List ...
Page 315: ...9 21 Confidential Cover page sample End page sample ...
Page 320: ...9 26 Confidential Paper Feeding Check Pattern for the Paper Feed Roller ...
Page 321: ...9 27 Confidential Paper Feeding Check Pattern for the Paper Ejection Roller ...
Page 326: ...9 32 Confidential Vertical Alignment Check Patterns 600DPI 1200DPI ...
Page 329: ...9 35 Confidential Margin Check Pattern ...
Page 448: ...Confidential B Power supply PCB U S A and Canadian models ...
Page 449: ...Confidential B Power supply PCB European Asian and Oceanian models ...
Page 453: ...Confidential May 07 SM FAX067 8CAE03 1 Printed in Japan ...