Minolta DI750 - SERVICE, 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.
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 (11x17) -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
Di750Ver.3field015e.p65 01/07/18, 17:42 55