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MX-2300/2700 N/G ADJUSTMENTS 6 – 17
4)
Check the rough adjustment and the fine adjustment print pat-
tern positions of each color in the front frame and the rear
frame sides.
Use the visually highest color density section as the center,
and measure the shift amount.
The front frame registration and the rear frame registration are
adjusted independently.
To check the image registration, therefore, check the front
frame side and the rear frame side individually.
(If the fine adjustment print pattern is located in the range of 0
±
1 from the fine adjustment reference pattern scale, the
adjustment is not required.)
If the above condition is not satisfied, select the color mode
adjustment item A – F to be adjusted with the scroll key and
change the adjustment value to adjust.
Repeat procedures 3) – 4) until a satisfactory result is
obtained.
For measurement of the shift amount and the calculation of the
adjustment value, refer to the table below.
(Measurement of the shift amount and the calculation of
the adjustment value)
a)
Measurement of the shift amount
* Measurement of the fine adjustment pattern
The visually highest color density section is regarded as
the center, and used as the measurement value.
(Example)
The measurement value of the figure is "7."
* Measurement of the rough adjustment pattern
Check that the color line is positioned in the plus direc-
tion or in the minus direction and judge the polarity from
that.
The center black line is scaled as 0, the first line mark
as 20, the second line mark as 40, the third line mark as
60. The interval between the rough adjustment marks
corresponds to 20.
(Example)
In the case of the figure, it is between 20 – 40 of the
plus polarity, and the measurement is "20."
* The actual shift amount is the sum of the rough adjust-
ment reference shift amount and the fine adjustment
shift amount.
Shift amount (correction value) = Rough adjustment
shift Fine adjustment shift amount
When calculating, be careful of the plus polarity and the
minus polarity.
(Example)
In the case of the figure, the total shift amount is 27.
Measurement value: 27 (= 20 + 7)
Measurement value: –27 (= –20 – 7)
The shift amount from the adjustment reference position
is calculated for each of six kinds of adjustment items A
– F.
b)
Adjustment value calculation
Add or subtract the shift amount calculated above to or
from the current adjustment value, and the result value is
used as the new adjustment value.
Adjustment value = Current adjustment value + Shift
amount (correction value)
(When the shift amount (correction value) is plus)
Adjustment value = Current adjustment value – Shift
amount (correction value)
(When the shift amount (correction value) is minus)
Rough adjustment
print pattern check:
Check that the rough adjustment print pattern is at
the center for the rough adjustment reference
pattern.
Fine adjustment
print pattern check:
Check that the fine adjustment print pattern is at the
center for the fine adjustment reference pattern.
Display/Item
Content
Adjustment
value range
Default
value
A
CYAN
(FRONT)
Image registration adjustment
value (Main scanning
direction) (Cyan) (F side)
1 – 199
100
B
CYAN
(REAR)
Image registration adjustment
value (Main scanning
direction) (Cyan) (R side)
1 – 199
100
C
MAGENTA
(FRONT)
Image registration adjustment
value (Main scanning
direction) (Magenta) (F side)
1 – 199
100
D
MAGENTA
(REAR)
Image registration adjustment
value (Main scanning
direction) (Magenta) (R side)
1 – 199
100
E
YELLOW
(FRONT)
Image registration adjustment
value (Main scanning
direction) (Yellow) (F side)
1 – 199
100
F
YELLOW
(REAR)
Image registration adjustment
value (Main scanning
direction) (Yellow) (R side)
1 – 199
100
20
-20