Canon imageRUNNER ADVANCE C255 Series, Service Manual, Page: 866 / 987

FEEDER (ADF service mode) > ADJUST (Adjustment mode)
LA-SPD2 1 Fine adj img ratio: DADF,vert scan,back
Detail To make a fine adjustment of the back side image magnification ratio in vertical scanning direction
at DADF reading.
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 DADF
- When replacing the Reader Controller PCB/clearing RAM data
Adj/Set/Operate Method Enter the setting value (switch negative/positive by -/+ key) and press OK key.
Display/Adj/Set Range -200 to 200 (-2.00 to 2.00%)
Unit %
Default Value 0
Amount of Change per
Unit
0.01
ADJMSCN1 1 Fine adj img ratio:2-sided,horz scan,frt
Detail To make a fine adjustment of the front side image magnification ratio in horizontal scanning
direction at DADF 2-sided reading.
As the value is incremented by 1, the image is enlarged by 0.1% in horizontal scanning direction.
Use Case When image magnification ratio on the front side and back side are different at 2-sided reading
Adj/Set/Operate Method Enter the setting value (switch negative/positive by -/+ key) and press OK key.
Display/Adj/Set Range -10 to 10
Unit %
Default Value 0
Amount of Change per
Unit
0.1
ADJMSCN2 1 Fine adj img ratio:2-sided,horz scan,bck
Detail To make a fine adjustment of the back side image magnification ratio in horizontal scanning
direction at DADF 2-sided reading.
As the value is incremented by 1, the image is enlarged by 0.1% in horizontal scanning direction.
Use Case
When image magnification ratio on the front side and back side are different at 2-sided reading
Adj/Set/Operate Method
Enter the setting value (switch negative/positive by -/+ key) and press OK key.
Display/Adj/Set Range
-10 to 10
Unit %
Default Value 0
Amount of Change per
Unit
0.1
FUNCTION (Operation / inspection mode)
FEEDER (ADF service mode) > FUNCTION (Operation / inspection mode)
MTR-CHK 1 Specification of DADF operation motor
Detail To specify the motor of DADF to operate.
The motor is activated by MTR-ON.
Use Case At operation check
Adj/Set/Operate Method Enter the setting value, and then press OK key.
Display/Adj/Set Range 0: ADF Motor (M4201)
Related Service Mode FEEDER> FUNCTION> MTR-ON
8. Service Mode
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