Sharp MX-2300 G Service Manual page 64

4) Check the rough adjustment and the fine adjustment print pat-
tern positions of each color.
The visually highest color density section is regarded as the
center, and used as the measurement value.
Rough adjustment Check that the rough adjustment print pattern is at
print pattern check: the center for the rough adjustment reference
pattern.
Fine adjustment Check that the fine adjustment print pattern is at the
print pattern check: center for the fine adjustment reference pattern.
(If the fine adjustment print pattern is positioned in the range of
0 ± 1 for 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 – C to be adjusted with the scroll key, and
change the adjustment value to adjust.
Display/Item Content
A CYAN Image registration adjustment
value (Sub scanning
direction) (Cyan)
B MAGENTA Image registration adjustment
value (Sub scanning
direction) (Magenta)
C YELLOW Image registration adjustment
value (Sub scanning
direction) (Yellow)
Repeat procedures 3) – 4) until a satisfactory result is
obtained.
For measurement of the shift amount and calculation of the
adjustment value, refer to the table below.
(Measurement of the shift amount and 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 of the
shift amount.
(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 mark 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."
A: Rough adjustment pattern
B: Fine adjustment pattern
C: Adjustment range
The shift amount is calculated from the adjustment ref-
erence position for each of the three adjustment items A
– C.
Adjustment Default
value range value
1 – 199 100
1 – 199 100
1 – 199 100
MX-2300/2700 N/G ADJUSTMENTS 6 – 20
Measurement value: –27 (= –20 – 7)
A
-20
B
C
Measurement value: 27 (= 20 + 7)
A
20
B
C