Scan Area - Konica Minolta bizhub C650 Service Manual

10. Service Mode
10.4.6

Scan Area

• Use the following color chart for the adjustment of the scanner section.
• If the color chart is not available, a scale may be used instead.
COLOR CHART
1.0 4.0 2.5 2.2
4.5
2.8
2.0
1.1 3.2
C
1.8
3.6
1.25
1.4 1.6
Color is "hue",
lightness is "value",
saturation is "chroma":
this is the world of color.
The quality of color which can be
Hue
described by words such as red,
yellow, blue etc.
A
The quality of color which can be
Value
described by words such as light,
dark etc., relating the color to a gray
of a similar lightness.
Chroma The quality of color which can be
described by words such as vivid,
dull etc., describing the extent to
which a color differs from a gray
having the same value.
Y M C
C M C Y Y M
P1
B
Original Reference
A. Image Position: Leading Edge
Functions • To adjust variations in mounting accuracy and sensitivity of the scanner home sensor
and in mounting accuracy of the original width scale by varying the scan start posi-
tion in the main scan direction.
Use • When the original glass is replaced.
• When the original width scale is replaced.
Adjustment
Specification
A
Adjustment If the copy image is less than the specified length, increase the setting value.
Instructions If the copy image exceeds the specified length, decrease the setting value.
Setting/ 1. Call the Service Mode to the screen.
2. Touch these keys in this order: [Machine] → [Scan Area] → [Image Position: Leading
Procedure
Edge].
3. Position the color chart correctly so that the original reference point is aligned with
the scale.
4. Press the Start key to make a copy.
5. Check point A on the image of the copy.
6. If width A on the copy falls outside the specified range, change the setting using the
[+] / [-] key.
7. Press the Start key to make another copy.
8. Check the image on the copy to see if the specifications are met.
9. Make adjustments until the specifications are met.
452
COLOR CHART
Y M C
C M C Y Y M
10 9 8 7 6 5 4 3 2 1
MODEL :
MACHINE S/N :
DATE : / / °C %RH
COUNTER :
COPY DENSITY :
1.0 4.0 2.5 2.2
COLOR BALANCE Y :
M :
4.5 2.8
2.0 C :
1.1 3.2 BK :
1.8 OTHERS :
3.6
1.25 1.4
1.6
CHART NO. : CTC-008-01
PART NO. : 4036-7940-01
P1 Printed In Japan
D
4038F3C517DA
A00JF3C507DA
Field Service Ver. 8.0 Jun. 2008
• A: Image Position: Leading Edge
• B: Image Position: Side Edge
• C: Cross Direction Adjustment
• D: Feed Direction Adjustment
•B width on the color chart and one on the
copy sample are measured and adjusted so
that the difference of A width satisfies the
specifications shown below.
•An adjustment must have been completed
correctly of [Leading Edge Adjustment] of
[Printer Area].
Specifications
A: ± 0.5 mm
(10 ± 0.5 mm if a scale is used)
Setting range
-5.0 to +5.0 (in 0.1 mm increments)