Oki ML490 Maintenance Manual page 81

No. Item
4–1–1 Gap between the plat-
en and the print head
1) Parallelism
justment
2) Initial adjustment
Carriage shaft
42114101 Rev.1
Specification
ad-
Variation of
value at the
left, the center
and the right
shall be less
than 0.02 mm
Marking
0.35 0.03 mm
Left
Range: 1
Range: 5
Adjust lever
Adjust gear
Adjust screw
Drawing
After adjustment, mark the adjust
composition with a red pen.
Left
Right
Platen
Center Right
Print head
Adjust cam
Adjustment method
It shall be measured
at 3 points: the left
end, the center and
the right end of the
platen.
Adjustment method
(1) Gap between the
platen and the
print head at the
left end and the
right end shall be
adjusted by rota-
ting the adjust
Adjust cam
cam.
(2) Set the adjust
lever at
Range: 1. Press
the adjust gear
downward
direction A) to
push the adjust
gear and the
adjust gear out of
mesh.
(3) Adjust the gap by
rotating the adjust
screw in direction
B or C while the
adjust lever and
the adjust gear
are disengaged.
(4) After adjustment,
mark the adjust
cam position with
a red pen.
the
(in
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