Canon Color imageCLASS MF8280Cw, Service Manual

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Service Mode > FEEDER > ADJUST
Service Mode > FEEDER > ADJUST
FEEDER
ADJUST
FEEDER > ADJUST
DOCST Fine adjustment of VSYNC timing at ADF reading [front side]
Details To make a fine adjustment of VSYNC timing when reading the front
side of original with ADF.
Execute when the output image after ADF installation is displaced.
When replacing the Main Controller PCB, 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 ADF
• When replacing the Main Controller PCB
Adj/set/operate method Enter the setting value (switch negative/positive by -/+ key) and
press OK key.
Display/adj/set range -30 to 30
Unit 0.1 mm
Default value 0
LA-SPD 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 ADF
• When replacing the Main Controller PCB
Adj/set/operate method Enter the value, and then press OK key.
Display/adj/set range
-200 to 200
Unit 0.01%
Default value 0
FEEDER > ADJUST
DOCST2 Fine adjustment of VSYNC timing at ADF reading [back side]
Details To make a fine adjustment of VSYNC timing when reading the back
side of original with ADF.
Execute when the output image after ADF installation is displaced.
When replacing the Main Controller PCB, 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 ADF
• When replacing the Main Controller PCB
Adj/set/operate method Enter the setting value (switch negative/positive by -/+ key) and
press OK key.
Display/adj/set range -30 to 30
Unit 0.1 mm
Default value 0
DOCST-R Fine adjustment of trailing edge at ADF reading
Details To make a fine adjustment of trailing edge when reading original with
ADF.
Execute when the output image after ADF installation is displaced.
When replacing the Main Controller PCB, 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 ADF
• When replacing the Main Controller PCB
Adj/set/operate method Enter the setting value (switch negative/positive by -/+ key) and
press OK key.
Display/adj/set range -30 to 30
Unit 0.1 mm
Default value 0
LA-SPD2 Fine adjustment of magnification ratio in vertical scanning direction
at ADF stream reading [back side]
Details To make a fine adjustment of the image magnification ratio in vertical
scanning direction when stream reading the back 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 replacing the Main Controller PCB
Adj/set/operate method Enter the value, and then press OK key.
Display/adj/set range
-200 to 200
Unit 0.01%
Default value 0
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