Sharp AR-C262M (serv.man3) Service Manual ▷ View online
AR-C262M SETTING AND ADJUSTMENTS 8 - 6
1) Enter the SIM44-2 mode.
2) Press the [EXECUTE] key.
The adjustment is performed automatically. When the adjust-
ment is completed, the adjustment result is displayed and the
the [EXECUTE] key display returns to the original state.
ment is completed, the adjustment result is displayed and the
the [EXECUTE] key display returns to the original state.
If the adjustment is not completed normally, "ERROR" is dis-
played.
played.
In that case, check the following sections for no abnormality. If
there is any abnormality, repair the part and perform the adjust-
ment again.
there is any abnormality, repair the part and perform the adjust-
ment again.
In case of an error, the adjustment result is not revised.
• Image density sensor
• PCU PWB
• Transfer belt
(1) LED print engine image focus adjustment (LED
(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 the print image is shifted.
(Especially conspicuous for text and line drawings)
(The scanner (reading) unit is normal, but the print image focus
of the print engine is not normal.)
(The scanner (reading) unit is normal, but the print image focus
of the print engine is not normal.)
• When there is uneven density in the main scanning direction.
• When the color balance adjustment does not result in proper
color matching.
• When in installation or when the installing site is changed. (Nec-
essary depending on the case)
1) Execute the process correction forcibly. (SIM44-6)
This simulation is used to correct the print density of the
adjustment pattern.
adjustment pattern.
2) Enter the SIM 61-4 mode.
SIM 61-4
3) Set the items A, B and C according to the table below.
4) Select the A4 (11 x 8 1/2) paper feed tray.
5) Press the [EXECUTE] key.
The focus adjustment pattern is printed.
6) Check the printed focus adjustment pattern for each color.
If focus is proper, the half-tone belts are printed properly.
When four or five half-tone belts of each color are printed and
there is no density difference in the main scanning direction
(back and forth), the focus is proper both on the front and the
back sides.
When four or five half-tone belts of each color are printed and
there is no density difference in the main scanning direction
(back and forth), the focus is proper both on the front and the
back sides.
ADJ 2B
Black image density sensor
adjustment
adjustment
Display
Content
Min
Value
Max
Value
Default
value
A PCS_C
LED ADJ
Color image density
sensor LED current
adjustment value
sensor LED current
adjustment value
1
255
51
B PCS K
LED ADJ
Black image density
sensor LED current
adjustment value
sensor LED current
adjustment value
1
255
51
C PCS_K
GAIN
Black image density
sensor output gain
(AMP) adjustment value
sensor output gain
(AMP) adjustment value
0
15
0
D PCS_K
DARK
Black image density
sensor dark voltage level
sensor dark voltage level
0
255
0
E PCS_K
GRND
Black image density
sensor transfer belt
surface detection level
sensor transfer belt
surface detection level
0
255
0
F BELTMAX Transfer belt surface
max. detection level
(Black image sensor)
(Black image sensor)
0
255
0
G BELTMIN
Transfer belt surface
min. detection level
(Black image sensor)
min. detection level
(Black image sensor)
0
255
0
H BELTDIF
Difference between the
max. value and the min.
value of the transfer belt
surface detection level
(BELTMAX-BELTMIN)
max. value and the min.
value of the transfer belt
surface detection level
(BELTMAX-BELTMIN)
0
255
0
ADJ 3
Image focus, image skew
adjustment (LED (writing) unit)
adjustment (LED (writing) unit)
Parameter
Set value
A
PRINT PATTERN
2
B
LINE PITCH
7
C
POSITION
6
Check that the half-tone belts of each color are printed
in good balance.
in good balance.
Front side
Paper exit
direction
direction
AR-C262M SETTING AND ADJUSTMENTS 8 - 7
7) If the above condition is not satisfied, turn the focus adjust-
ment screws on the front/rear frame sides to adjust focus.
Focus on the front side can be separately adjusted from focus
on the rear side.
on the rear side.
Front frame side
Rear frame side
Execute procedures 4 to 6 for each color.
(2) Print engine image skew adjustment (LED (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 the print image includes skew.
(When the scanner (reading) unit is normal and the print image
of the print engine includes skew.)
of the print engine includes skew.)
• When a color image registration error occurs.
(There is an image registration difference in the main scanning
direction.)
direction.)
• When there is uneven density in the main scanning direction.
• When the color balance adjustment does not result in proper
color matching.
• When in installation or when the installing site is changed. (Nec-
essary depending on the case)
1) Enter the SIM 64-1 mode.
SIM 64-1
2) Set the items A and B according to the table below.
3) Select the A3 (11 x 17) size paper feed tray.
4) Select Black (K) and press the [EXECUTE] key.
The grid patter (one page) is printed.
5) Check the printed grid pattern. (Check for image skew (distor-
tion).)
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.
less for the longitudinal print line of paper, there is no need to
adjust.
Parameter
Set value
A
PRINT PATTERN
1
B
DENSITY
1
A
B
0.5mm or less
Right-angle
Reference line
Longitudinal direction
Comparison line
AR-C262M SETTING AND ADJUSTMENTS 8 - 8
6) If the above conditions are not satisfied, remove the develop-
ing unit and turn the print engine image skew adjustment
screw to adjust.
screw to adjust.
At that time, use SIM 7-1 to set DV CHECK DISABLE to
Enable and to disable the developing unit installation detec-
tion.
Enable and to disable the developing unit installation detec-
tion.
If skew is made in the arrow direction A, turn the adjustment
screw clockwise. If skew is made in the arrow direction B, turn
the adjustment screw counterclockwise.
screw clockwise. If skew is made in the arrow direction B, turn
the adjustment screw counterclockwise.
7) Enter the SIM 61-4 mode.
SIM 61-4
8) Select the A4 (11 x 8.5) size paper feed tray.
9) Press the [EXECUTE] key.
The print engine image skew adjustment pattern is printed.
(One page)
(One page)
10) Check the printed image skew (distortion) pattern.
Compare the same color print pattern on the front frame side
with that on the rear frame side, and check that the difference
between the two highest-density areas is within 2 steps.
(Compare the same color print pattern on the front frame side
with that on the rear frame side. There is no need for the posi-
tions of the highest-density areas of the print color patterns of
all the colors to be aligned on a line. Compare only the same
color pattern positions.)
with that on the rear frame side, and check that the difference
between the two highest-density areas is within 2 steps.
(Compare the same color print pattern on the front frame side
with that on the rear frame side. There is no need for the posi-
tions of the highest-density areas of the print color patterns of
all the colors to be aligned on a line. Compare only the same
color pattern positions.)
If the above conditions are not satisfied, remove the developing
unit on the left and turn the print engine image skew adjustment
screw on the front frame side.
unit on the left and turn the print engine image skew adjustment
screw on the front frame side.
To adjust the print engine image skew of Cyan, for example,
remove the Magenta developing unit. (To adjust the print engine
image skew of Yellow, however, this is not required.)
remove the Magenta developing unit. (To adjust the print engine
image skew of Yellow, however, this is not required.)
When the image pattern on the front frame side is skewed to the
right (arrow direction A) with the rear frame side as the reference,
turn the adjustment screw clockwise. When the image pattern is
skewed to the left (arrow direction B), turn the adjustment screw
counterclockwise.
right (arrow direction A) with the rear frame side as the reference,
turn the adjustment screw clockwise. When the image pattern is
skewed to the left (arrow direction B), turn the adjustment screw
counterclockwise.
When the adjustment screw is turned 1/4 rotation, the image posi-
tion is shifted by one dot.
tion is shifted by one dot.
Remark: The print engine image focus adjustment is performed
by changing the distance between the LED array unit
and the OPC drum.
and the OPC drum.
The print engine image skew adjustment is performed
by changing the parallelism of the LED array unit for the
OPC drum.
by changing the parallelism of the LED array unit for the
OPC drum.
If either of the two adjustments is performed, it may
affect the other adjustment due to the machine structure.
affect the other adjustment due to the machine structure.
After completion of the above procedures, check that
both of the above two adjustments are satisfied.
both of the above two adjustments are satisfied.
B
A
Improper adjustment
Proper adjustment
Rear
side
side
Paper exit side
Front
side
side
Rear
side
side
Front
side
side
Paper exit side
AR-C262M SETTING AND ADJUSTMENTS 8 - 9
There are two methods of the image registration adjustment: the
manual adjustment and the automatic adjustment. Either of them
uses the simulation.
manual adjustment and the automatic adjustment. Either of them
uses the simulation.
This adjustment is required in the following cases:
• When the scanner (writing) unit is replaced.
• When the scanner (writing) unit is removed from the machine.
• When color image mis-resist is generated in the main scanning
direction.
• When color image mis-resist is generated in the sub scanning
direction.
• When installation or the installing place is changed.
• When maintenance is performed. (When the OPC drum, the
photoconductor cartridge, the transfer unit, or the transfer belt is
replaced.)
replaced.)
• When U2 trouble occurs.
• When ICU PWB is replaced.
• When EEPROM on ICU PWB is replaced.
Remark: Though SIM 50-22 is not performed under the following
conditions, the image registration adjustment is per-
formed automatically.
formed automatically.
∗
When the toner cartridge is replaced.
∗
At every 8,000 copies (total of print quantity and copy quantity)
(When 8,000 copies is reached during a job, the machine stops
after completion of the job.)
(When 8,000 copies is reached during a job, the machine stops
after completion of the job.)
If the set item AR of SIM 44-1 is set to OFF (Disable), the above
operation is not performed.
operation is not performed.
After setting the image registration to the best by SIM 50-20, when
the image registration adjustment is automatically performed, the
best-adjusted condition may be varied. To avoid this, set the item
AR of SIM 44-1 to OFF (Disable).
the image registration adjustment is automatically performed, the
best-adjusted condition may be varied. To avoid this, set the item
AR of SIM 44-1 to OFF (Disable).
Note:
Before executing this adjustment, check that the following adjust-
ments have been properly completed.
ments have been properly completed.
∗
Print engine image focus adjustment (Scanner (writing) unit)
∗
Print engine image skew adjustment (Scanner (writing) unit)
∗
Image registration sensor adjustment
∗
SIM 48-6 FSM (Fuser roller speed) is set to the default.
Default setup of SIM 48-6 FSM (Fuser roller speed)
D: 80 (For paper of 420mm or shorter in the transport direction)
I: 85 (For paper of 420mm or longer in the transport direction)
J: 85
K: 70
This adjustment is used to perform the image registration adjust-
ment in the main scanning direction and in the sub scanning direc-
tion at the same time with the simulation.
ment in the main scanning direction and in the sub scanning direc-
tion at the same time with the simulation.
1) Enter the SIM 50-22 mode.
SIM 50-22
2) Press the [EXECUTE] key.
The [EXECUTE] key is highlighted, and the image registration
automatic adjustment is started. After completion of the adjust-
ment, the [EXECUTE] key returns to the normal display.
automatic adjustment is started. After completion of the adjust-
ment, the [EXECUTE] key returns to the normal display.
The adjustment process status is indicated with (
∗
) mark. It
takes several minutes to complete the adjustment.
3) Enter the SIM 50-20 mode.
SIM 50-20
4) Select the A4 (11 x 8 1/2) size paper feed tray.
5) Press the [EXECUTE] key.
The image registration adjustment pattern is printed.
ADJ 4
Image registration adjustment
ADJ 4A
Image registration adjustment
(Auto adjustment)
(Auto adjustment)
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