Canon MF720 Series, Service Manual, Page: 308 / 327

FEEDER
ADJUST
FEEDER > ADJUST
Item Description
DOCST
Title
Fine adjustment of VSYNC timing at ADF reading [front side]
Details To make a fine adjustment of the VSYNC timing when reading the front side of original with ADF.
Execute this item when the output image after ADF installation is displaced.
When replacing the Main Controller PCB / clearing RAM, enter the value of service label.
As the value is incremented by 1, the margin at the leadgin edge of image is reduced by 0.1%.(The image
moves in the direction of the leading edge of the sheet.)
Use case • When installing the ADF
• When replacing the Main Contoroller PCB/ clearing RAM data
Adj/set/operate method Enter the setting value (switch negative / positive by * key) and press Apply key.
Display/adj/set range -30 to 30
Unit 0.1 mm
Default value 0
LA-SPD
Title
Fine adjustment of magnification ratio in vertical scanning direction at ADF stream reading [front side]
Details To make a fine adjustment of the image magnification ratio in vertical scanning direction when stream
reading the front side of original with ADF.
As the value is incremented by 1, the image is reduced by 0.01% in vertical scanning direction. (The feeding
speed increases, and the image is reduced.)
Use case • When installing the ADF
• When replacing the Main Controller PCB/ clearing RAM data
Adj/set/operate method Enter the setting value (switch negative / positive by * key) and press Apply key.
Display/adj/set range -200 to 200
Unit 0.01%
Default value 0
DOCST2
Title
Fine adjustment of VSYNC timing at ADF reading [back side]
Details To make a fine adjustment of the VSYNC timing when reading the back side of original with ADF.
Execute this item when the output image after ADF installation is displaced. When replacing the Main
Controller PCB / clearing RAM, enter the value of service label.
As the value is incremented by 1, the margin at the leading edge of the image is decreased by 0.1mm.
(The image moves in the direction of the leading edge of the sheet.)
Use case • When installing the ADF
• When replacing the Main Controller PCB / clearing RAM data
Adj/set/operate method Enter the setting value (switch negative / positive by * key) and press Apply key.
Display/adj/set range -30 to 30
Unit 0.1 mm
Default value 0
DOCST-R
Title
Fine adjustment of trailing edge at ADF reading
Details To make a fine adjustment of trailing edge when reading original with ADF.
Execute this item when the output image after ADF installation is displaced.
When replacing the Main Controller PCB / clearing RAM, enter the value of service label.
As the value is incremented by 1, the margin at the trailing edge of the image is decreased by 0.1mm. (The
image moves in the direction of the trailing edge of the sheet.)
Use case • When installing the ADF
• When replacing the Main Controller PCB / clearing RAM data
Adj/set/operate method Enter the setting value (switch negative / positive by * key) and press Apply key.
Display/adj/set range -30 to 30
Unit 0.1 mm
Default value 0
8. Service Mode
300