Sharp AR-C270 (serv.man8) Service Manual ▷ View online
NOTE: Do not press the [EXECUTE] key in SIM 8-6, otherwise the
photoconductor may be damaged.
The AR-C250/C160/C270 is provided with the adjustment of the
transfer voltage with SIM 44-30 from the beginning of production, and
the AR-C100/C150 in the middle of production.
transfer voltage with SIM 44-30 from the beginning of production, and
the AR-C100/C150 in the middle of production.
ADJ M5
Paper skew adjustment
This adjustment must be performed in the following cases:
•
When the resist roller section is disassembled.
1) Enter the SIM 64-1 mode.
Select the black print mode.
2) Set the items as shown below:
A: 5
B: 255
C: 1
D: 9
E: Select A3 (11
×
17) paper size.
3) Press the [EXECUTE] key.
The grid pattern is printed. Check that the print line in the paper
transport direction is in parallel with both edges.
transport direction is in parallel with both edges.
If the above condition is not satisfied, perform the following proce-
dure.
dure.
4) Loosen the resist roller fixing screw, and change the resist roller
angle.
The standard position is at the center.
Repeat procedures 3) – 4) until the condition of procedure 3) is satis-
fied.
fied.
ADJ M6
Image density sensor adjustment
ADJ 1
Image density sensor calibration
This adjustment must be performed in the following cases:
•
When the image density sensor is replaced.
•
When the transfer belt is replaced.
•
When a U2 trouble occurs.
•
When the PCU main PWB is replaced.
•
When the EEPROM of the PCU main PWB is replaced.
The process control sensor gain adjustment means:
The detection level differs between machines due to variations in
density detection sensors and parts. To prevent against this, attach a
seal of a certain density on the belt to calibrate the sensor.
density detection sensors and parts. To prevent against this, attach a
seal of a certain density on the belt to calibrate the sensor.
1) With the power OFF, open the right cover of the machine.
2) Pull out the transfer unit, and attach the adjustment sheet (UKOG-
0281FCZZ) to the belt.
(The attachment position is between the two separation pawls of
the fusing unit.)
(The attachment position is between the two separation pawls of
the fusing unit.)
3) Return the transfer unit. With the front cover open, turn on the
power.
4) Enter the SIM 44-13 mode.
5) Close the front cover.
6) Press the [EXECUTE] key.
The adjustment is automatically performed. When the adjustment
is completed, the [EXECUTE] key returns to the normal display.
is completed, the [EXECUTE] key returns to the normal display.
7) Check that the SIM 44-13 values are within the specifications.
Check content
Spec
PCLEDC (Sensor current in color calibration)
128 or below
DARK_ID (Color image density sensor dark
voltage)
voltage)
50 or below
P_PSI (Read value of calibration sheet)
102
±
5
P_CYI (Read value of calibration plate)
80
±
15
∗
When an error message is displayed, clean the sensor and the
calibration plate, and adjust again.
calibration plate, and adjust again.
∗
If the above procedure cannot cancel the error, replace the
sensor and the calibration plate.
sensor and the calibration plate.
8) Turn off the power.
La
Paper transport direction
Paper
Paper edge
Check that lines
are in parallel.
are in parallel.
Lb
7 – 5
9) Pull out the transfer unit, and remove the adjustment sheet.
(The adjustment sheet is positioned in front of the cleaning blade
at the back of the unit as the transfer belt rotates.)
at the back of the unit as the transfer belt rotates.)
10) Return the transfer unit.
NOTE: If the motor drive power is turned on immediately after at-
taching the adjustment sheet to the transfer belt, the adjust-
ment sheet does not stop at the specified position and the
transfer belt keeps rotating.
As a result, the adjustment sheet may be damaged by the
transfer cleaning blade or the transfer cleaning blade may be
damaged by the adjustment sheet.
ment sheet does not stop at the specified position and the
transfer belt keeps rotating.
As a result, the adjustment sheet may be damaged by the
transfer cleaning blade or the transfer cleaning blade may be
damaged by the adjustment sheet.
To prevent against this, be sure to observe the following.
1) Before entering the SIM 44-13 mode, open the right
cover of the machine to open the motor drive power line.
2) After completion of the adjustment, remove the adjust-
ment sheet from the transfer belt.
ADJ 2
Image density sensor sensing position
adjustment
adjustment
This adjustment must be performed in the following cases:
•
When the image density sensor is replaced.
•
When the image density sensor section is replaced.
•
When a U2 trouble occurs.
•
When the PCU main PWB is replaced.
•
When the EEPROM of the PCU main PWB is replaced.
1) Enter the SIM 44-23 mode.
2) Press the [EXECUTE] key. The adjustment is automatically per-
formed, and the average data is displayed.
When the operation is completed, the [EXECUTE] key is high-
lighted.
In case of an abnormal end, "ERROR" is displayed.
When the operation is completed, the [EXECUTE] key is high-
lighted.
In case of an abnormal end, "ERROR" is displayed.
•
When the ICU main PWB is replaced.
•
When the EEPROM of the ICU main PWB is replaced.
ADJ M7
Image skew adjustment (Scanner
(Writing) unit)
(Writing) unit)
This adjustment must be performed in the following cases:
•
When the scanner (writing) unit is replaced.
•
When the scanner (writing) unit is removed from the machine.
•
When a color image mis-resist occurs.
•
When the installing location is changed.
1) Enter the SIM 64-1 mode.
Select the color mode of Black.
2) Set the values of A – D of the set item as shown in the table be-
low, and make an A3 (11"
×
17") copy. (The grid pattern is
printed.)
∗
Use the paper tray at the bottom.
SIM 64-1 set items
Parameter
Set value
A
PRINT PATTERN
5
B
PRINT START GRADATION LEVEL
1
C
SELF PRINT Q’TY SETTING
1
D
DENSITY MODE
9
Enter the input value with the 10-key and press the OK key. When
the [EXECUTE] key is pressed, printing is performed. Paper is se-
lected by the set item E.
the [EXECUTE] key is pressed, printing is performed. Paper is se-
lected by the set item E.
3) Check the distortion of the printed image.
If the right-angle level of the traverse print line is 0.5mm or less for
the longitudinal print line of paper, there is no need to adjust.
the longitudinal print line of paper, there is no need to adjust.
4) If the image is distorted, loosen the red screw for the holder on the
chassis side, and adjust the LSU inclination with the black LSU
adjustment screw (set screw). (The LSU at the right end is black.)
After completion of the adjustment, fix the holder with the red
screw.
adjustment screw (set screw). (The LSU at the right end is black.)
After completion of the adjustment, fix the holder with the red
screw.
0.5mm or less
Longitudinal direction
Reference line
Right-angle
Comparison line
Red screw for the holder
7 – 6
5) Enter the SIM 61-4 mode.
6) Select A3 (11
×
17) paper and press the [EXECUTE] key. Paper is
selected by the set item B.
The check pattern is printed.
The check pattern is printed.
∗
Use the paper tray at the bottom.
7) Check that the center shift between the Y/M/C print color patterns
is within 0
±
1 step.
(Check the shift between the print patterns of the same color.
Even though there is some shift between different colors, there is
no problem.)
If the above condition is not satisfied, loosen the red screw for the
holder on the front side of the chassis, and adjust the LSU adjust-
ment screw (set screw) to adjust the LSU inclination.
After completion of the adjustment, fix the holder with the red
screw.
Even though there is some shift between different colors, there is
no problem.)
If the above condition is not satisfied, loosen the red screw for the
holder on the front side of the chassis, and adjust the LSU adjust-
ment screw (set screw) to adjust the LSU inclination.
After completion of the adjustment, fix the holder with the red
screw.
Procedures 1) – 4) : Adjustment procedures of the black LSU
Procedures 5) – 7) : Adjustment procedures of the color LSU
Compare the positions (front-rear) of the same color print patterns.
Compare the positions (front-rear) of the same color
7 – 7
5) Enter the SIM 61-4 mode.
6) Select A3 (11
×
17) paper and press the [EXECUTE] key. Paper is
selected by the set item B.
The check pattern is printed.
The check pattern is printed.
∗
Use the paper tray at the bottom.
7) Check that the center shift between the Y/M/C print color patterns
is within 0
±
1 step.
(Check the shift between the print patterns of the same color.
Even though there is some shift between different colors, there is
no problem.)
If the above condition is not satisfied, loosen the red screw for the
holder on the front side of the chassis, and adjust the LSU adjust-
ment screw (set screw) to adjust the LSU inclination.
After completion of the adjustment, fix the holder with the red
screw.
Even though there is some shift between different colors, there is
no problem.)
If the above condition is not satisfied, loosen the red screw for the
holder on the front side of the chassis, and adjust the LSU adjust-
ment screw (set screw) to adjust the LSU inclination.
After completion of the adjustment, fix the holder with the red
screw.
Procedures 1) – 4) : Adjustment procedures of the black LSU
Procedures 5) – 7) : Adjustment procedures of the color LSU
Compare the positions (front-rear) of the same color print patterns.
Compare the positions (front-rear) of the same color
7 – 7
Display
