Canon imageRUNNER ADVANCE C350 series Service Manual page 368

4
Disassembly/Assembly > Original Exposure/Feed System > Removing the ADF Unit > ADF Unit
Fine adjustment of the image magnification ratio at ADF reading (front side)
1) Set the image of the test chart upward in ADF, and give one sheet of copy.
2) Compare the image length of the feed direction of the test chart and the copy of the test
chart.
Carry out the following process when adjustment is necessary.
3) Select the item in the service mode.
LV. FEEDER > ADJUST >
1
4) Input value, and adjust an image.
• When a copied image is long: Increase value (The feeding speed increases)
• When a copied image is short: Decrease value (The feeding speed decreases)
• Adjustment unit: 0.1 %
< When a copied image moves to the rear >
Test chart
Copy of the test chart
A
Leading edge Trailing edge
of the feeding of the feeding
direction direction
5) Write the new changed value in the service label.
6) Exit the service mode.
4 Disassembly/Assembly > Original Exposure/Feed System > Removing the ADF Unit > ADF Unit
LA-SPEED
T-4-50
< When a copied image moves to the front >
Copy of the test chart
Test chart
A
Leading edge Trailing edge
of the feeding of the feeding
direction direction
Fine adjustment of the image magnification ratio at ADF reading (back side)
1) Set the image of the test chart downward in ADF, and give one sheet of copy.
2) Compare the image length of the feed direction of the test chart and the copy of the test
chart.
Carry out the following process when adjustment is necessary.
3) Select the item in the service mode.
LV.
1
4) Input value, and adjust an image.
• When a copied image is long: Increase value (The feeding speed increases)
• When a copied image is short: Decrease value (The feeding speed decreases)
• Adjustment unit: 0.1 %
< When a copied image moves to the rear >
Test chart
Copy of the test chart
F-4-130
A
Leading edge
of the feeding
direction
5) Write the new changed value in the service label.
6) Exit the service mode.
FEEDER > ADJUST >
LA-SPD2
< When a copied image moves to the front >
Test chart
Copy of the test chart
Trailing edge Leading edge
of the feeding of the feeding
direction direction
4-61
T-4-51
A
Trailing edge
of the feeding
direction
F-4-131
4-61