Sharp MX-4100N Service Manual page 67

4) Check the rough adjustment and the fine adjustment print pat-
tern positions of each color.
Use the visually highest color density section as the center,
and measure the shift amount.
Rough adjustment print pattern
check
Fine adjustment print pattern check
(If the fine adjustment print pattern is located in the range of 0
±1 from the fine adjustment reference pattern scale, the adjust-
ment 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 the calculation of the
adjustment value, refer to the following.
(Measurement of the shift amount and the calculation of
the adjustment value)
a) Measurement of the shift amount
* Measurement of the fine adjustment pattern
Use the visually highest color density section as the
center, and measure the shift amount.
(Example)
The measurement value of the figure is "14".
* 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 40, the second line mark as 80, the third line mark as
120. The interval between the rough adjustment marks
corresponds to 40.
(Example)
In the case of the figure, it is between 40 - 80 of the plus
polarity, and the measurement is "40".
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.
Check that the rough adjustment
print pattern is at the center for the
rough adjustment reference
pattern.
Check that the fine adjustment
print pattern is at the center for the
fine adjustment reference pattern.
Adjustment
Default
value range
1 - 199 100
1 - 199 100
1 - 199 100
MX-5001N ADJUSTMENTS 5 – 25
Measurement value: -54 (= -40 - 14)
A
-40
B
-18
-16
-14
-12
-10
-8
-6
-4
-2
0
C
-38
-36
-34
-32
-30
-28
-26
-24
-22
Measurement value: 54 (= 40 + 14)
A
40
B
-18
-16
-14
-12
-10
-8
-6
-4
-2
C 0
-38
-36
-34
-32
-30
-28
-26
-24
-22
-120
120
22
24
26
28
30
32
34
36
38
0
2
4
6
8
10
12
14
16
18
-120
120
22
24
26
28
30
32
34
36
38
0
2
4
6
8
10
12
14
16
18