Xerox 5915, Руководство по обслуживанию

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4-19 4. Optics
Section 4 Disassembly/Assembly/Adjustment
Check
1. Align Test Chart(499T247) with the Regi-
Guide and make a size- for-size copy of it on
A3 paper.
2. (Fig. 1): Measure A, B, C & D each. Check
that the values each obtained by subtracting B
from A and D from C are in the specifications
below:
A – B
→
within
±
1.6mm
C – D
→
within
±
2.0mm
(Fig. 1)
Adjustment
A - B is out of spec.
1. Power off the machine and disconnect the
Power Plug.
2. Remove the Platen Glass. .........……... (4.1.1)
3. Remove the Optical Cooling Fan. ...….. (4.1.2)
4. (Fig. 2): Move the Full-Rate Carriage holding it
at its rear.
NOTE :
•
Do not move the Carriage right and left
more than 2mm; otherwise, there could
occur problems such as poor resolution
and the Carriage slamming on the
frame.
➀
. Remove Carriage Wire Mounting
Screw.
➁
. Adjust by moving Full-Rate Carriage
with Carriage Cable still.
•
A>B
Move the Carriage to
the right.
•
A<B
Move the Carriage to
the left.
➂
.Tighten Screw.
(Fig. 2)
C - D is out of spec.
1. Power off the machine and disconnect the
Power Plug.
2. Remove the Platen Glass. ………….…. (4.1.1)
3. Remove the Right Upper Cover.
4. (Fig. 3): Move the Half-Rate Carriage holding it
at its front.
NOTE :
•
Do not move the Carriage right and left
more than 2mm; otherwise, there could
occur problems such as poor resolution
and the Carriage slamming on the
frame.
➀
. Loosen Front Capstan Pulley
screws(2).
➁
. (Fig. 3): To adjust, move the Half-
Rate Carriage by rotating the
Capstan Pulley.
NOTE :
•
Do not remove the screw for
the Rear Capstan Pulley.
•
Do not rotate the Carriage
Drive Shaft.
•
In the case of C > D, rotate the
Capstan in the
−
a
direction.
•
In the case of C < D, rotate the
Capstan in the
−
b
direction.
➂
. Tighten Screw.
Reference The standard tightening torque is
0.5N
•
m(5kgf
•
cm).
(Fig. 3)
4.3.4 Size-for-Size Fine Tuning
Purpose To set the vertical magnification
(Scan direction) and horizontal
magnification(Drum axis direction).
Reference When the machine is shipped out
from the plant, its copy magnification
is set to 100%
±
0.8%.
Check
1. Make a size-for-size A3 copy of Test Chart
(499T247).
2. (Fig. 1): Check that designated locations are
the same in length by comparing Test Chart
with the copy as follows:
•
Vertical Magnification
Check on
➁
to
➃
,
➁
to
➄
and
➃
to
➄
.
•
Horizontal Magnification
Check on
➀
to
➁
,
➁
to
➂
and
➀
to
➂
.
(Fig. 1)