Radf Original Skew Adjustment; Db-409/410 Paper Centering Adjustment - Konica Minolta 7020 Service Manual

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[3]

RADF Original Skew Adjustment

When originals are fed being skewed, adjust the
registration pully bracket.
Open/close
cover
Up wards
Down wards
(1) Turn on the 1 −> 1 mode, then set the ADF chart on
the DF-314 and make a copy.
(2) Check pattern of the skewed original feed.
Standard value: ±0.5% less.
Paper feed
direction
Paper
(3) When the standard value for skew is not fit, open the
open/close cover, then adjust position of the
registration pully bracket.
Skew pattern A:
Move the registration pully bracket down.
Skew pattern B:
Move the registration pully bracket up.
(4) Repeat above steps 1 to 3 until the standard value for
the skewed original is within standard value.
Set screw
Registration
pully
Image
Skew pattern A Skew pattern B
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DB-409/410 Paper Centering Adjustment

2
Reinforcing plates
Make a copy of the test chart, then perform
necessary adjustment until the standard value for the
paper centering is fit.
(1) Loosen a set screw on the side guide situated at bottom
of the tray. And also loosen the two set screws on the
reinforcing plates (front/back) situated at top of the tray.
(2) Move the side guide back and forth by turning to the
adjusting cam until the paper centering is within
standard value.
(3) When the adjustment is complete, tighten the set screws
provided for the side guide and reinforcing plates.
Measured
value
Note: If paper miscentering occurs, move the side
guide forwards and backwards, and adjust
the gap for the paper in use to between 1.0
and 1.5mm. (The gap must be set so that
the paper lifting plate meets both the lower
limit position and the upper limit position.
4-91
OTHER
ADJUSTMENT
47
Set screw
Set screws
Adjusting cam
Center of image
Center of paper