Sharp AR-C260 (serv.man11) Service Manual ▷ View online
AR-C260/C260M SETTING AND ADJUSTMENTS 8 - 5
Note:
There are two methods to adjust the color image density sensor; one
method uses the adjustment jig, and the other method does not use it.
method uses the adjustment jig, and the other method does not use it.
If there is no adjustment jig available, the simple adjustment (SIM44-
36) can be made, which may, however, result in insufficient adjustment
accuracy depending on the machine condition.
36) can be made, which may, however, result in insufficient adjustment
accuracy depending on the machine condition.
If toner, the OPC drum, and the transfer belt are not new ones or
almost new ones, the simple adjustment is not recommended.
almost new ones, the simple adjustment is not recommended.
Even though the machine conditions are well, the adjustment by use of
the adjustmment jig gives a higher adjustment accuracy than the
adjustment without the adjustment jig (simple adjustment).
the adjustmment jig gives a higher adjustment accuracy than the
adjustment without the adjustment jig (simple adjustment).
Also note that SIM44-36 must not executed unnecessarily after execu-
tion of the color image density sensor adjustment (adjustment by the
adjustment jig) with SIM44-13.
tion of the color image density sensor adjustment (adjustment by the
adjustment jig) with SIM44-13.
If SIM 44-36 is executed, the contents of the color image density sen-
sor adjustment (adjustment by the adjustment jig) with SIM44-13 are
erased, and the adjustment result of SIM44-36 is saved.
sor adjustment (adjustment by the adjustment jig) with SIM44-13 are
erased, and the adjustment result of SIM44-36 is saved.
When the color image density sensor is adjusted with SIM44-13 and
the black image density sensor is adjsuted with SIM 44-2, the adjust-
ment with SIM44-36 is not required.
the black image density sensor is adjsuted with SIM 44-2, the adjust-
ment with SIM44-36 is not required.
To adjust the black image density sensor, the adjustment jig is not
required.
required.
Before executing this adjustment, check the following items:
• Check that the color imagte density sensor is clean.
• Check that the image density sensor calibration plate is clean.
• Check that the transfer belt is free from scratches.
1) Open the front cover of the machine.
2) Insert the color image density sensor adjustment jig
(CPLTM6305FC01) into the long hole in the transfer unit frame,
and close the left cabinet.
and close the left cabinet.
3) With the front cover of the machine open (with the cover open/
close switch OFF), turn on the power.
4) The Machine enters Sim 44-13 mode.
SIM 44-13
5) Close the front cover of the machine.
6) Press the [EXECUTE] key.
The adjustment is performed automatically. When the adjustment
is completed, the adjustment result is displayed and the the [EXE-
CUTE] key display returns to the original state.
is completed, the adjustment result is displayed and the the [EXE-
CUTE] key display returns to the original state.
7) Remove the color image density sensor adjustment jig.
If the adjustment is not completed normally, "ERROR" is displayed.
In that case, check the following sections for no abnormality. If there is
any abnormality, repair the part and perform the adjustment again. In
case of an error, the adjustment result is not revised.
any abnormality, repair the part and perform the adjustment again. In
case of an error, the adjustment result is not revised.
• Image density sensor
• PCU PWB
• Transfer belt
Note:
The color image density sensor adjustment jig is available in the follow-
ing two forms:
ing two forms:
• The jig metal plate with the calibration sheet attached to it
(CPLTM6305FC01)
• Calibration sheet (for replacement) (TLABZ4843FCZZ)
TLABZ4843FCZZ is the calibration sheet for replacement. When the
calibration sheet attached to CPLTM6305FC01 is dritied or scratched
too much to be used, replace only the calibration sheet with a new one.
calibration sheet attached to CPLTM6305FC01 is dritied or scratched
too much to be used, replace only the calibration sheet with a new one.
ADJ 2A
Color image density sensor adjustment
(adjustment by the adjustment jig)
(adjustment by the adjustment jig)
Display
Content
Min
Value
Max
Value
Default
value
A
PCS_C
CARB ADJ
CARB ADJ
Color image density
sensor LED current
adjustment target value
sensor LED current
adjustment target value
1
255
108
B
PCS_C
DARK
DARK
Color image density
sensor dark voltage
level
sensor dark voltage
level
0
255
0
C
PCS_C LED
ADJ
ADJ
Color image density
sensor current
adjustment value
sensor current
adjustment value
1
255
51
AR-C260/C260M SETTING AND ADJUSTMENTS 8 - 6
1) Enter the SIM44-2 mode.
2) Press the [EXECUTE] key.
The adjustment is performed automatically. When the adjustment
is completed, the adjustment result is displayed and the the [EXE-
CUTE] key display returns to the original state.
is completed, the adjustment result is displayed and the the [EXE-
CUTE] key display returns to the original state.
If the adjustment is not completed normally, "ERROR" is displayed.
In that case, check the following sections for no abnormality. If there is
any abnormality, repair the part and perform the adjustment again.
any abnormality, repair the part and perform the adjustment again.
In case of an error, the adjustment result is not revised.
• Image density sensor
• PCU PWB
• Transfer belt
When the color image density sensor is adjusted with SIM44-13 and
the black image density sensor is adjusted with SIM44-2, the adjust-
ment with SIM44-36 is not required.
the black image density sensor is adjusted with SIM44-2, the adjust-
ment with SIM44-36 is not required.
In addition, the color image density adjustment jig is not used.
1) Enter the SIM44-36 mode.
2) Press the [EXECUTE] key.
The adjustment is performed automatically. When the adjustment
is completed, the adjustment result is displayed and the the [EXE-
CUTE] key display returns to the original state.
is completed, the adjustment result is displayed and the the [EXE-
CUTE] key display returns to the original state.
If the adjustment is not completed normally, "ERROR" is displayed.
In case of an error, the adjustment result is not revised.
In case of an error, the adjustment result is not revised.
In that case, check the following sections for no abnormality. If there is
any abnormality, repair the part and adjust again.
any abnormality, repair the part and adjust again.
• 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. (Neces-
sary depending on the case)
ADJ 2B
Black image density sensor adjustment
Display
Content
Min
Value
Max
Value
Default
value
A
PCS_C
LED ADJ
LED ADJ
Color image density
sensor current
adjustment value
sensor current
adjustment value
1
255
51
B
PCS K
LED ADJ
LED ADJ
Black image density
sensor LED Current
adjustment value
sensor LED Current
adjustment value
1
255
51
C
PCS_K
GAIN
GAIN
Black image density
sensor output gain
(AMP) adjustment value
sensor output gain
(AMP) adjustment value
0
15
0
D
PCS_K
DARK
DARK
Black image density
sensor dark voltage level
sensor dark voltage level
0
255
0
E
PCS_K
GRND
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)
max. detection level
(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 2C
Color image density sensor & black
image density sensor adjustment
(Simple adjustment)
image density sensor adjustment
(Simple adjustment)
Display
Content
Min
Value
Max
Value
Default
value
PCS_C
CARB ADJ
CARB ADJ
Color image density
sensor LED current
adjustment target value
sensor LED current
adjustment target value
1
255
108
PCS_C
DARK
DARK
Color image density
sensor dark voltage level
sensor dark voltage level
0
255
0
PCS_C LED
ADJ
ADJ
Color image density
sensor current adjustment
value
sensor current adjustment
value
1
255
51
PCS K LED
ADJ
ADJ
Black image density
sensor LED current
adjustment value
sensor LED current
adjustment value
1
255
51
PCS_K
GAIN
GAIN
Black image density
sensor output gain (AMP)
adjustment value
sensor output gain (AMP)
adjustment value
0
15
0
PCS_K
DARK
DARK
Black image density
sensor dark voltage level
sensor dark voltage level
0
255
0
PCS_K
GRND
GRND
Black image density
sensor transfer belt
surface detection level
sensor transfer belt
surface detection level
0
255
0
BELTMAX
Transfer belt surface max.
detection level (Black
image sensor)
detection level (Black
image sensor)
0
255
0
BELTMIN
Transfer belt surface min.
detection level (Black
image sensor)
detection level (Black
image sensor)
0
255
0
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)
AR-C260/C260M SETTING AND ADJUSTMENTS 8 - 7
1) Execute the process correction forcibly. (SIM44-6)
This simulation is used to correct the print density of the adjust-
ment pattern.
ment 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.
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.
7) If the above condition is not satisfied, turn the focus adjustment
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.
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.)
the print engine includes skew.)
• When a color image registration error occurs.
(There is an image registration difference in the main scanning direc-
tion.)
tion.)
• 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. (Neces-
sary depending on the case)
Parameter
Set value
A
PRINT PATTERN
2
B
DENSITY
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-C260/C260M SETTING AND ADJUSTMENTS 8 - 8
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 (distortion).)
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.
6) If the above conditions are not satisfied, remove the developing
unit and turn the print engine image skew adjustment screw to
adjust.
adjust.
At that time, use SIM 7-1 to set DV CHECK DISABLE to Enable
and to disable the developing unit installation detection.
and to disable the developing unit installation detection.
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 adjust-
ment screw counterclockwise.
clockwise. If skew is made in the arrow direction B, turn the adjust-
ment 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)
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 positions 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.)
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 positions 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.
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.)
the Magenta developing unit. (To adjust the print engine image skew of
Yellow, however, this is not required.)
At that time, use SIM 7-1 to set DV CHECK DISABLE to Enable and to
disable the developing unit installation detection.
disable the developing unit installation detection.
Parameter
Set value
A
PRINT PATTERN
1
B
DENSITY
1
A
B
0.5mm or less
Right-angle
Reference line
Longitudinal direction
Comparison line
B
A
Improper adjustment
Proper adjustment
Rear
side
side
Paper exit side
Front
side
side
Rear
side
side
Front
side
side
Paper exit side
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