(Example) When La=12mm and Lb=9mm, shift the paper exit side mirror base B rail upward by 1.5mm.
•When Lc > Ld, shift the mirror base B rail downward by half of the difference of Lc – Ld.
•When Lc < Ld, shift the mirror base B rail upward by half of the difference of Lc – Ld.
(When moving the mirror base rail, hold the mirror base rail handle.)
2Adjust according to procedure (1) so that La=Lb and Lc=Ld are satisfied.
3After completion of the adjustment, turn the mirror base drive pulley manually to full scan mirror base A and mirror base B, and check that the mirror bases are not brought into contact with each other.
(Note) When the mirror bases are moved extremely, they may be brought into contact. Carefully avoid it.
I. Center shift adjustment
a. This adjustment must be performed in the following cases: | |
• | The copy (100%) center is shifted from the original center |
| more than 2mm. |
• | When any part of the lens rail or the lens unit is replaced. |
(5)Remove the document reference plate and the right upper side cabinet, and remove the document table glass.
Document reference plate
Document table glass
Right upper side cabinet
(6)Loosen the three fixing screws of the optical system unit and slide the optical system unit to adjust the center position.
<Adjustment procedure>
(1)make a test chart for center position adjustment. (Refer to the figure below.)
Draw a line at the center
Copy paper (A4 or 11" x 8½")
Paper transport direction
(2)Set the test chart for the center position adjustment to the
document reference line, and make a normal (100%) copy with an A4 or 11" × 81⁄2" paper.
(3)Check that the copied image line is at the center of the copy paper.
B
Optical system unit
Loosen the
screwsA (3pcs.)
Lens bearing side
Original |
center |
(Original) |
Copy |
paper |
center |
2mm |
or less (Copy 1) |
Move lens is the A direction |
Lens | Copy | |
body | paper | |
side | center | |
2mm | (Copy 2) | |
or less | ||
Move lens is the B direction |
(Copy A)
(Copy B)
2.0mm or less
Shift
2.0mm or less
Shift
(Paper feed direction)
Copy image
Copy paper fold
Copy paper 
fold
Copy image
(7)After adjustment, set the removed parts in the reversed se-
quence. make a copy of the test chart to check that the center shift is within the specified range (0 ±2.0mm). If the center shift
is within the specified range, the adjustment is completed. If not, repeat procedures (2) – (7) until it is within the specified range.
J. Exposure balance adjustment
a. This adjustment is to provide uniform exposure, and must be | |
performed in the following cases: | |
• | When the reflector is replaced. |
• | When the copy lamp is replaced. |
(4)If the error of the copy image line is within the specified range (0±2.0mm), the adjustment is not required. If not, perform the following procedures.
• When the exposure adjustment plate is replaced. |
<Adjustment procedure>
(1)Set a half tone paper on the original table and make a half tone copy at 100%.
(2)If the exposure of the half tone copy is uniform, the adjustment is not required. If it is varied as shown below, perform the following procedures.
Exposure
insufficient
Paper discharge 
direction
7 – 12
