Konica Minolta 7075/FORCE 75, Руководство по обслуживанию

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36 ADJUSTMENT
1 ADJUSTMENT
LD2 LD1 LD2 LD1 LD2 LD1 LD2 LD1
4. Auto dot diameter adjustment
Automatically adjusting the dot diameter.
This adjustment should be performed when the
drum, developer, write unit, or dust-proof glass
is replaced.
Preparation: Be sure the drum unit is set,
developer is in the developing unit.
Auto drum potential adjustment and
auto maximum density adjustment
must have been complete.
Step Operation
1 Enter the 36 mode.
2 [36 Mode Menu Screen]
Press “
1
Process adjustment.”
3 [Process adjustment Screen]
Press “
2
Drum peculiarity adjustment.”
4 [Drum peculiarity adjustment mode
menu Screen]
Press “
4
Auto dot diameter adjustment.”
5 [Auto Dot Diameter Adjustment Screen]
Press the
START
key.
The dot diameter is adjusted automati-
cally.
Adjustment completes in about 30 sec-
onds and an end message is displayed.
6 Press the
PREVIOUS SCREEN
key to re-
turn to the Process adjustment Screen.
5. LD1 offset adjustment
Adjusting the LD1 laser write position.
This adjustment should be performed when the
drum or developer is replaced. (Adjusting 400 dpi
and 600 dpi must be completed for 7085.)
Preparation: Be sure the drum unit is set .
Auto drum potential adjustment,
auto maximum density adjustment,
and auto dot diameter adjustment
must have been complete.
Step Operation
1 Enter the 36 mode.
2 [36 Mode Menu Screen]
Press “
1
Process adjustment.”
3 [Process adjustment Screen]
Press “
2
Drum peculiarity adjustment.”
4 [Drum peculiarity adjustment mode
menu Screen]
Press “
5
LD1 offset adjustment.”
5 [LD1 Offset Adjustment Screen]
Press the
COPY SCREEN
key.
6 Select A3-size paper and press the Start
button to output the test pattern.
7 Check the test pattern.
Specification: The density of test
pattern image resulting from two laser
output (vertical and horizontal scanning)
must be even vertically and horizontally
between two image density reference
lines, as shown in the following figure.
Reference 1:
If either of the following error messages appears
during auto dot diameter adjustment, clean the
TSCB ( toner control sensor board), check its
installation state, and retry the auto dot diameter
adjustment.
<1> Error 1:
The
γ
sensor dirt correction has been
corrected 10 or more times, but it does not
converge.
<2> Error 2:
Auto dot diameter adjustment has ended
with an abnormal value.
Reference
line
3
METHOD
REPLACEMENT
MODEL
7075/7085
MANUAL
SERVICE HANDBOOK
REVISED EDITION
3
DATE
Jan. 2002
PAGE
1-70