Minolta Di551 Service Manual page 351

ADJUSTMENT
5. LD2 offset adjustment
This adjusts the place at which LD2 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, auto dot
diameter adjustment, and LD1 offset adjustment
must have been completed.
Step
Enter the 36 mode.
1
[Adjustment mode menu Screen]
2
Press " Process adjustment".
1
[Process adjustment mode menu
Screen]
3
Press " Drum peculiarity adjustment".
2
[Drum peculiarity adjustment mode
menu Screen]
4
Press " LD2 offset adjustment".
5
[LD2 offset adjustment Screen]
Press any key of
5
.
LS185
6
Press the
COPY SCREEN
Select A3 size paper and press the START
7
button to output the test pattern.
Operation
, , or
LS320 LS280
key.
Check the test pattern.
Specification: Check if two output pat-
8
LD1 LD2
If the specification is not satisfied, press the
9
C button while pressing the Utility button.
[LD2 offset adjustment Screen]
Enter an offset value using the numeric
10
keys and press the
Setting range: -128 to +127
Repeat steps 6 to 10 until the specification
11
is satisfied.
Press the
12
Drum peculiarity adjustment mode menu
Screen.
Reference:
Select
LS320
speed 320 mm/sec.),
postcard mode (280 mm/sec.) (Japan only), or
to adjust in thick paper mode (185
LS185
mm/sec.).
2-54
terns from laser are consis-
tent and the beginning of
the lower density part is
aligned between the two
lines as illustrated below.
Reference line
LD1 LD2 LD1 LD2 LD1 LD2
key.
SET
key to return to the
RETURN
to adjust in normal mode (line
to adjust in
LS280