2AV/X
1-6-26
1-6
Figure 1-6-39
(4) Adjusting the skew and vertical shifting of the laser scanner unit
(4-1) Adjusting the skew of the laser scanner unit
Perform the following adjustment if the leading and trailing edges of the copy image are laterally skewed (lateral
squareness not obtained).
Caution:
• After adjusting the skew of the laser scanner unit, make a test copy and check the copy image. If lateral squareness is
still not obtained, perform "(6) Adjusting the position of the ISU" (see page 1-6-30).
Procedure
Refit the laser scanner unit and
turn the main switch on.
Yes
No
Press the start key and make
a copy at 100% magnification.
Start
End
Is the image correct?
Enter maintenance mode.
Enter “993” using the numeric keys.
Press the interrupt key.
• 20 cpm
Select “VTC-PG2” using the
cursor up/down keys.
• 15 cpm
Select “2” using the copy
exposure adjustment keys.
Press the start key.
Turn the main switch off and remove the
laser scanner unit (see page 1-6-24).
Change the insertion direction of the LSU
front spacer (see table 1-6-1).
Press the stop/clear key to
exit maintenance mode.
Correct image
Copy
example 1
Copy
example 2
Skew : X (mm)
Skew: X (mm)* –8 mm ⬉ X < –3 mm –3 mm ⬉ X ⬉ +3 mm +3 mm < X ⬉ +8
No marking (2nd from the bottom)
LSU front spacer
insertion direction
LSU front spacer
O (3rd from the bottom) X (4th from the bottom)
LSU front spacer LSU front spacer
*"–" indicates that the beginning of the printing is higher than the ending (copy example 1)
"+" indicates that the beginning of the printing is lower than the ending (copy example 2)
Table 1-6-1
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