Read Sharp MX-7090N / MX-8090N (serv.man3) Service Manual online
MX-8090N MX-7090N/8090N (MAIN UNIT) 2 – 13
3. Image quality check
A. Execution items
Execute the following items.
When there are defects in a picture by the contents mentioned
above, you carry out the following contents, and confirm a picture.
B. Description
(1) Print engine image distortion adjustment
(Automatic adjustment) / OPC drum phase
adjustment (Automatic adjustment) / Color
registration adjustment (Automatic adjustment)
adjustment (Automatic adjustment) / Color
registration adjustment (Automatic adjustment)
This adjustment performs the print engine image distortion adjust-
ment, the OPC drum phase adjustment, and the color registration
adjustment simultaneously.
1) Enter SIM50-22 mode.
2) Press [EXECUTE] key.
2) Press [EXECUTE] key.
[EXECUTE] key is highlighted and the image registration auto-
matic adjustment is started. (It takes about 60 sec to complete
the adjustment.)
3) When the adjustment is completed, [EXECUTE] key returns to
the normal display, and the value of the adjustment result is
displayed.
The current skew level for each color is displayed on the
The current skew level for each color is displayed on the
SKEW display section.
NOTE:
When an abnormality occurs, "ERROR" is displayed.
In this case, check each drive section and the process sec-
In this case, check each drive section and the process sec-
tion.
No.
Item
SIM
1
Print engine image distortion adjustment (Manual
adjustment) / OPC drum phase adjustment
(Automatic adjustment) / Color registration
adjustment (Automatic adjustment)
50-22
2
FR density variation correction
61-11
3
Copy/Printer color balance and density adjustment
(Automatic adjustment)
46-74
4
Copy color balance and density check
5
Printer color balance/density check
64-5
No.
Item
SIM
6
Print image off-center, lead edge position adjustment
50-10
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Display/
Item
Content
Display
NOTE
MAIN F
C
Registration adjustment value main scanning direction (Cyan laser writing position F side)
1.0 - 399.0
Same item with SIM
50-20.
* However, the
adjustment
accuracy is in the
unit of +/-0.1dot.
M
Registration adjustment value main scanning direction (Magenta laser writing position F side)
1.0 - 399.0
Y
Registration adjustment value main scanning direction (Yellow laser writing position F side)
1.0 - 399.0
( )
Registration value correction amount from the previous one, main scanning F
-399.0 -
399.0(±0.1)
MAIN R
C
Registration adjustment value main scanning direction (Cyan laser writing position R side)
1.0 - 399.0
M
Registration adjustment value main scanning direction (Magenta laser writing position R side)
1.0 - 399.0
Y
Registration adjustment value main scanning direction (Yellow laser writing position R side)
1.0 - 399.0
( )
Registration value correction amount from the previous one, main scanning R
-399.0 -
399.0(±0.1)
SUB
C
Registration adjustment value sub scanning direction (Cyan drum to Black drum)
1.0 - 399.0
M
Registration adjustment value sub scanning direction (Magenta drum to Black drum)
1.0 - 399.0
Y
Registration adjustment value sub scanning direction (Yellow drum to Black drum)
1.0 - 399.0
( )
Registration value correction amount from the previous one, sub scanning
-399.0 -
399.0(±0.1)
SKEW
C
Print skew amount calculation result (Cyan)
-99.9 - +99.9
M
Print skew amount calculation result (Magenta)
-99.9 - +99.9
Y
Print skew amount calculation result (Yellow)
-99.9 - +99.9
ALL_
ROTATE
Skew adjustment rotating direction and the number of dot (K)
-99.9 - +99.9
START
Modulation control start position
( ): Previous value
0 - 359
1 step 1degree
AMP1
Modulation control amplitude value
( ): Previous value
0.00 - 15.00
AMP2
Modulation control amplitude value
( ): Previous value
0.00 - 15.00
PHASE1
Modulation phase adjustment value
( ): Previous value
0 - 359
PHASE2
Modulation phase adjustment value
( ): Previous value
0 - 359
PHASE/K
Tandem phase adjustment value
( ): Previous value
0 - 359
POSITION Drum phase position value
( ): Previous value
0 - 359
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