Service manual

ADJUSTMENT
2-51
2 ADJUSTMENT
4. LD1 offset adjustment
This adjusts the place at which LD1 laser starts
writing.
This adjustment should be performed when the
drum or developer is replaced. The adjustment is
performed at line speed of 320, 280 and 185
respectively.
Be sure the drum unit is set.
Auto maximum density adjustment and auto dot
diameter adjustment must have been com-
pleted.
Reference:
Select to adjust in normal mode (line
speed 320mm/sec.), to adjust in
postcard mode (280mm/sec.) (Japan only), or
to adjust in thick paper mode
(185mm/sec.).
Step Operation
1
Enter the 36 mode.
2
[Adjustment mode menu Screen]
Press " Process adjustment".
3
[Process adjustment mode menu
Screen]
Press " Drum peculiarity adjust-
ment".
4
[Drum peculiarity adjustment mode
menu Screen]
Press " LD1 offset adjustment".
5
[LD1 offset adjustment Screen]
Press any key of , , or
.
6
Press the key.
7
Select A3 size paper and press the
START button to output the test pattern.
1
2
4
LS320
LS280
LS185
COPY SCREEN
8
Check the test pattern.
Specification:
Check if two output pat-
terns from laser are con-
sistent and the
beginning of the lower
density part is aligned
between the two lines as
illustrated below.
9
If the specification is not satisfied, press
the C button while pressing the Utility
key.
10
[LD1 offset adjustment Screen]
Enter an offset value using the numeric
keys and press the key.
Setting range: -128 to +127
11
Repeat steps 6 to 10 until the specifica-
tion is satisfied.
12
Press the key to return to the
Drum peculiarity adjustment mode
menu Screen.
LD1 LD2 LD1 LD2 LD1 LD2 LD1 LD2
Reference line
Reference line
SET
RETURN
LS320
LS280
LS185