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SF-7200
3. Adjustments
Optical system adjustment procedure
Follow the flowchart below for adjustment of the optical
system, in order to permit production of a proper copy.
Focus adjustment
Move the No.1 mirror
holding bracket to
adjust.
Check if the focus
<(erolution) is within
the aiven rating.
Adjust the
exposure balance
by moving the
exposure
contro! plates,
Check if the
exposure balance
is correct,
heck if the
lens base unit
location is
Copy skew adjustment
Move the No.1 mirror
holding bracket and
the rear frame focation
to adjust.
Adjust the
location of the
lens base unit,
Check if the
Magnification ratio
is within the given:
rating
YES
Copy magnification ratio
adjustment
Move the lens sensor
location to adjust.
NO
'Check if the lens No>
matched with the
scale on the
MSS, 6, and 7
he scale on the MS5, 6,
end 7,
YES
(1-@
Turn the MS6
actuator adjusting
screw fully clock-
wise.
is there any
difference between the
lead edge void area of the
x 2.0 copy and the
x 0.7 copy.
YES
(n-@
Execute the test
command 50 and
enter the preset
value of "30°,
NO
1s the lead edge void
area of the x2.0 copy
jJarger than the lead
edge void area of the
Make 2 copy of
x 0.7.
Obtain the value S2
which is the lead edge
void area of the x 0.7
copy minus the lead
edge void are of the
x 2.0 copy divided by
0.425.
(B—A)/0.425 = $2
Make a copy of
x20.
Measure the lead
edge void area A
of the x 2,0 copy
and the lead edge
void area B of the
x 0.7 copy.
Obtain the value S4
which is the lead
edge void area of the
x 2.0 copy minus the
lead edge void area of
the x 0.7 copy divided
by 0.425.
(A—B)/0.425 = S1
Make the MS6
actuator adjusting
screw counterclock-
wise as much as the
value of S1.
Make the MS6
actuator adjusting
screw clockwise as
much as the value
of $2.
(N-@)—a
(71-@-d
Make 8 copy of the normal
size (1:1) and measure the
lead edge void area X,
Check if the
lege void area is within
the given rating
NO
edge void area is larger
(2<X)
YES
(7-@—b
Ontain the value Y2 which is
2mm deducted by the lead
edge void area X.
(1-@—-b
Obtain the vatue Y1 which is
the lead edge void area X
deduced by —2mm,
Compute ¥2/0.5 = Z2.
Compute Y/0.5 = 21,
Change the preset vatue of the
test command 50 to the value
(previous preset value minus
Z2)}.
inN-@—c
Change the preset value of the
test command 50 to the value
(previous preset value plus Z2}.
Cancel the test
command 50.
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