Sharp MX-1800N (serv.man14) Service Manual ▷ View online
MX-1800N 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.
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.
± 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)
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
* 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."
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."
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 amount + Fine adjustment shift amount
shift amount.
Shift amount (correction value) = Rough adjustment
shift amount + 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)
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.
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)
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:
print pattern check:
Check that the rough adjustment print pattern is at
the center for the rough adjustment reference
pattern.
the center for the rough adjustment reference
pattern.
Fine adjustment
print pattern check:
print pattern check:
Check that the fine adjustment print pattern is at the
center for the fine adjustment reference pattern.
center for the fine adjustment reference pattern.
Display/Item
Content
Adjustment
value range
value range
Default
value
A
CYAN
(FRONT)
(FRONT)
Image registration adjustment
value (Main scanning
direction) (Cyan) (F side)
value (Main scanning
direction) (Cyan) (F side)
1 – 199
100
B
CYAN
(REAR)
(REAR)
Image registration adjustment
value (Main scanning
direction) (Cyan) (R side)
value (Main scanning
direction) (Cyan) (R side)
1 – 199
100
C
MAGENTA
(FRONT)
(FRONT)
Image registration adjustment
value (Main scanning
direction) (Magenta) (F side)
value (Main scanning
direction) (Magenta) (F side)
1 – 199
100
D
MAGENTA
(REAR)
(REAR)
Image registration adjustment
value (Main scanning
direction) (Magenta) (R side)
value (Main scanning
direction) (Magenta) (R side)
1 – 199
100
E
YELLOW
(FRONT)
(FRONT)
Image registration adjustment
value (Main scanning
direction) (Yellow) (F side)
value (Main scanning
direction) (Yellow) (F side)
1 – 199
100
F
YELLOW
(REAR)
(REAR)
Image registration adjustment
value (Main scanning
direction) (Yellow) (R side)
value (Main scanning
direction) (Yellow) (R side)
1 – 199
100
20
-20
MX-1800N ADJUSTMENTS 6 – 18
E
F
Yellow
C
D
Magenta
A
B
Cyan
MX-1800N ADJUSTMENTS 6 – 19
(Example)
NOTE: If either of front or rear adjustment value is changed, the
other adjustment print pattern position may be varied. Be
careful of that.
careful of that.
10-C
Image registration adjustment (Sub
scanning direction) (Manual adjustment)
scanning direction) (Manual adjustment)
1)
Enter SIM50-21 mode.
2)
Select the paper feed tray with A4 (11 x 8.5) or A3 (11 x 17)
paper in it by changing the value of set item H.
paper in it by changing the value of set item H.
3)
Touch [EXECUTE] key.
The sub scanning direction image registration adjustment pat-
tern is printed.
The sub scanning direction image registration adjustment pat-
tern is printed.
A: Rough adjustment pattern
B: Fine adjustment pattern
C: Adjustment range
B: Fine adjustment pattern
C: Adjustment range
Previous value before adjustment
New adjustment value
A: 100
A: 93 (= 100 – 7)
B: 112
B: 100 (= 112 – 12)
C: 95
C: 96 (= 95 + 1)
D: 98
D: 109 (= 98 + 11)
E: 102
E: 109 (= 102 + 7)
F: 96
F: 118 (= 96 + 22)
EXECUTE
EXECUTE
0
A:
Aȇxxx
Bȇxxx
Ȉ
CYAN
Ȉ
MAGENTA
SIMULATIONġ NO.50-21
REGISTRATION ADJUSTMENT : SCANNING DIRECTION
xxx
1 199
OK
TEST
EXECUTE
CLOSE
Cȇxxx
Ȉ
YELLOW
Dȇxxx
Ȉ
MULTIOUNT
0
A:ġ
Aȇxx
Bȇxx
Ȉ
CYAN
Ȉ
MAGENTA
SIMULATIONġ NO.50-21
REGISTRATIONġ ADJUSTMENT : SCANNING DIRECTION
xxx
1 199
OK
TEST
EXECUTE
CLOSE
Cȇxxx
Ȉ
YELLOW
Dȇxxx
Ȉ
MULTIOUNT
10-key
or end of print
B
C
A
MX-1800N ADJUSTMENTS 6 – 20
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.
The visually highest color density section is regarded as the
center, and used as the measurement value.
(If the fine adjustment print pattern is positioned in the range of
0
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.
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.
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)
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
* 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."
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.
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.
Measurement value: –27 (= –20 – 7)
Measurement value: 27 (= 20 + 7)
Rough adjustment
print pattern check:
print pattern check:
Check that the rough adjustment print pattern is at
the center for the rough adjustment reference
pattern.
the center for the rough adjustment reference
pattern.
Fine adjustment
print pattern check:
print pattern check:
Check that the fine adjustment print pattern is at the
center for the fine adjustment reference pattern.
center for the fine adjustment reference pattern.
Display/Item
Content
Adjustment
value range
value range
Default
value
A
CYAN
Image registration adjustment
value (Sub scanning
direction) (Cyan)
value (Sub scanning
direction) (Cyan)
1 – 199
100
B
MAGENTA
Image registration adjustment
value (Sub scanning
direction) (Magenta)
value (Sub scanning
direction) (Magenta)
1 – 199
100
C
YELLOW
Image registration adjustment
value (Sub scanning
direction) (Yellow)
value (Sub scanning
direction) (Yellow)
1 – 199
100
-20
C
A
B
20
C
A
B
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