DOWNLOAD Sharp AR-C260 (serv.man11) Service Manual ↓ Size: 3.96 MB | Pages: 38 in PDF or view online for FREE

AR-C260/C260M  SETTING AND ADJUSTMENTS  8 - 33

This adjustment is the CCD gamma adjustment (CCD calibration) for
the copy document copy mode, and is different from the CCD gamma
adjustment (CCD calibration) in the normal document copy mode (ADJ
11A). There are above two kinds of the CCD gamma adjustment (CCD
calibration), and both adjustments are required.

This adjustment is required in the following cases:

• After execution of the CCD gamma adjustment (CCD calibration)

(normal document copy mode) (ADJ11A) and when the copy color
balance is customized with SIM46-21.

∗

Check that the table glass, No. 1/2/3 mirrors, and the lens surface
are free from dirt and dust.
(If dirt or dust is found, clean with alcohol.)

∗

Check that the patches of BK1 and BK2 of the SIT chart (UKOG-
0280 FCZZ are free from dirt or dust.
If dirt or dust is found, clean with alcohol.
If any damage is found, replace with a new one.

∗

Since this adjustment is based on the normal document copy mode
CCD gamma adjustment (CCD calibration) (ADJ 11A), the said
adjustment must have been completed before execution of this
adjustment.
The copy color balance must also have been adjusted properly.

1) Place the SIT chart (UKOG-0280FCZZ) on the left edge of the doc-

ument table, and fit the center of the SIT chart with the center of
the glass holder.

Note: Check that the SIT chart (UKOG-0280FCZZ) is in close contact

with the document table.

2) Close the document cover without shifting the SIT chart (UKOG-

0280FCZZ).

3) Make a copy in the Manual Photo mode.

(Be sure to use the specified copy paper.)

4) Set the copy made in procedure 3) on the document table so that

the center of the copy paper comes to the center of the left edge of
the document table.

5) Enter the SIM 63-09 mode and press the [EXECUTE] key.

The automatic adjustment is performed. During the adjustment, the
[EXECUTE] key is highlighted. When the adjustment is completed, the
[EXECUTE] key returns to the normal display.

6) Cancel the simulation mode.

Note: The SIT chart (UKOG-0280FCZZ) is affected by lights (espe-

cially ultra-violet rays) and temperature and humidity. Store it in
a clear file (nylon file) in a dark place.

The gamma or density of black toner component images is changed to
adjust the reproduction of the profile of the black character and line
optionally. Especially the thickness of fine black character and line is
changed.

Since the black toner component image quantity differs depending on
each copy mode, be careful to selection of the copy mode when check-
ing the result of this adjustment. Check in the Text/Printed photo copy
mode. 

This adjustment is valid only in the Text mode, the Text/Printed photo
mode, and the Text/Photograph mode. 

When the adjustment value different from the default value is used, this
adjustment must be performed in the following cases:

• When U2 trouble occurs.

• When the MFP PWB is replaced.

• When the EEPROM of the MFP PWB is replaced.

1) Enter the SIM 46-27 mode.

2) Enter the adjustment value with the 10-key.

When the adjustment value is increased, the black toner compo-
nent image contrast becomes greater, and vice versa.

The greater the adjustment value is, the greater the density is, and
vice versa.

Normally set to the default (50).

BLACK TEXT 
(SLOPE):

Black image edge section gamma (tilt) adjustment
(Black text and black line reproduction adjust-
ment)

BLACK TEXT 
(INTERCEPT):

Black image edge section density (overall level)
adjustment (Black txt and black line reproduction
adjustment)

AR-C260/C260M  SETTING AND ADJUSTMENTS  8 - 34

3) Press the [OK] key.

4) Cancel the simulation, and make a copy in the Text/Printed Photo

mode to check the reproduction of fine black character and line.

Use a document with black characters and lines on it for checking.

This adjustment is used to adjust color balance and the density accord-
ing to the user's demand.

The adjustment is made by setting the max. density level of Y, M and C
in each color.

This adjustment is required in the following cases when the default was
changed:

• When a consumable part (developer, photoconductor drum, transfer

belt) is replaced.

• When the CCD unit is replaced.

• When the scanner (reading) section is cleaned.

• When U2 trouble occurs.

• When the MFP PWB is replaced.

• When the EEPROM of the MFP PWB is replaced.

∗

This adjustment is not required in the normal state, but executed
only when the user requests for.

1) Enter the SIM 46-25 mode.

2) Select the color to be adjusted with the scroll key.

3) Select the color with the color key.

4) Enter the adjustment value of each toner color with the 10-key.

(Default)

5) Cancel the simulation mode and make a copy in the single color

copy mode to check.

The user can perform the copy color balance and auto density adjust-
ment in the user program mode.

SIIM 26-53 is used to Enable or Disable this operation.

Note: This setup is performed only when the user understands the

copy color balance and the auto density adjustment and is capa-
ble of performing the operation.

Full explanations on the operating procedure, notes, and opera-
tions must be given to the user.

This setting is required in the following cases:

∗

When a U2 trouble occurs.

∗

When the PCU main PWB is replaced.

∗

When the EEPROM on the PCU main PWB is replaced.

1) Enter the SIM 26-53 mode.

2) Select Enable/Disable with the 10-key.

Disabling = 0: YES
Enabling = 1: NO

3) Press the OK key.

When "0: YES" (Disabling) is selected, the user auto color calibra-
tion (copy color balance, auto density adjustment) menu is not dis-
played in the user program mode.

Note: This adjustment is based on the service target color balance set

with SIM 63-7 or 63-8. If, therefore, the above simulation is not
completed normally, this adjustment will not be completed nor-
mally.

1) Enter the user program mode.

2) Enter the copy mode.

3) Press the auto color calibration key.

4) Press the [EXECUTE] key.

The color patch image (adjustment pattern) is printed.

5) Set the color patch image (adjustment pattern) printed in proce-

dure 4) on the original table so that the darker density side comes
to the left side. Place 5 sheets of white paper on the color patch
image (adjustment pattern) paper.

6) Press the [EXECUTE] key. The copy color balance adjustment

(step 2) is automatically performed. After completion of the adjust-
ment, the display returns to the original menu.

Display

Content

Min 

value

Max 

value

Default value

C

M

Y

A

COLOR1

RED

0

255

0

255

255

B

COLOR2

GREEN

0

255

255

0

255

C

COLOR3

BLUE

0

255

255

255

0

D

COLOR4

YELLOW

0

255

255

0

0

E

COLOR5

MAGENTA

0

255

0

255

0

F

COLOR6

CYAN

0

255

0

0

255

KEY OPERATOR PROGRAMS
AUTOMATIC COLOUR CALIBLATION

PRESS [EXECUTE] TO PRINT THE TEST PATCH.
PLEASE USE SPECIFIED TYPE OF A3 (11"X17")
SIZE PAPER FOR THIS ADJUSTMENT.

OK

EXECUTE

Black

Yellow

Red

Blue

AR-C260/C260M  SETTING AND ADJUSTMENTS  8 - 35

This adjustment is required in the following cases when the default was
changed:

• When U2 trouble occurs.

• When the MFP PWB is replaced.

• When the EEPROM of the MFP PWB is replaced.

• When a request is made by the user.

This adjustment is valid only in the color auto copy mode (Text, Text/
Printed photo, Text/Photograph, Printed photo, Photograph).

1) Enter the SIM 46-33 mode.

2) Select the COLOR AE mode.

3) Select the setting mode with the scroll key.

4) Enter the set value with the 10-key and press the OK key to set the

entered value.

YES: Foundation removal is performed.
NO: Foundation removal is not performed.

Whether the foundation removal is performed or not is determined by
the AND condition of the set items A and B.

Used to set whether the text area is regarded important or not in judg-
ment of printed photo and the text/printed photo or photograph and
text/photograph.

1) Select the ORG RECOG mode.

2) Enter the set value with the 10-key and press the [OK] key to set

the entered value.

Used to set whether the text on dots is recognized as text or not.

1) Select the SEG mode.

2) Select the set mode A with the scroll key. 

3) Enter the set value with the 10-key and press the [OK] key to set

the entered value.

This function is effective especially when copying a document that is
printed by an inkjet printer or a laser printer in the automatic color copy
mode.

Some inkjet printers and laser printers express gradations with the
thickness of lines. In that case, line images may be erroneously recog-
nized as text images.

When recognized as text images, the area is printed with sharp edges
and high contrast, losing gradations. In addition, dirt may appear on
the print.

To cope with this problem, the text (edge) recognition level can be
adjusted.

1) Select the SEG mode.

2) Select the setting mode B with the scroll key, 

3) Enter the set value with the 10-key and press the [OK] key to set

the entered value.  

A: Foundation process judgment level setting (Judged by the ratio 

of printed photo in the document (ratio of dotted area).)

B: Foundation process judgment level setting (Judged by the 

document foundation color phase.)

C: Foundation removal quantity setting

Display

Set value (Display)

Ratio of printed photo in the document 

(Ratio of dot areas)

None or 

little

Little – 

Medium

Medium 

– Much

Very 

much

A

0

LOW

NO

NO

NO

NO

1

RATHER 
LOW

YES

NO

NO

NO

2 
(Default)

MIDDLE

YES

YES

NO

NO

3

RATHER 
HIGHT

YES

YES

YES

NO

4

HIGHT

YES

YES

YES

YES

Display

Set value (Display)

Color phase in the document

None or 

Weak

Weak – 

Medium

Medium 

– Strong

Very 

strong

B

0

LOW

NO

NO

NO

NO

1

RATHER 
LOW

YES

NO

NO

NO

2
(Default)

MIDDLE

YES

YES

NO

NO

3

RATHER 
HIGHT

YES

YES

YES

NO

4

HIGHT

YES

YES

YES

YES

Display

Set value (Display)

Foundation 

removal quantity

C

– 4

0

Little

– 3

1

↑

– 2

2

– 1

3

0

4 (Default)

+1

5

+2

6

+3

7

↓

+4

8

Much

Display

Set value

Content

A

TEXT 
PRIORITY 
MODE

0

DISABLE

There must be considerable 
level of text area to judge as 
text/printed photo or text/
photograph.

1 

(Default)

ENABLE

Only a light level of text area is 
enough for judging as text/
printed photo or text/
photograph.

Display

Set value

Content

A

0 (Default)

OFF

Text on dots is not recognized as text.

1

ENABLE

Text on dots is recognized as text. 
(Priority is placed on the reproduction 
of text.)

Display

Set value

Content

B

0 

(Default)

OFF

Normal mode (Normal text 
recognition level)
Depending on the type of 
documents, text images may be with 
sharp edges and high contrast. 

1

ON

Mode for documents printed by a 
printer: Documents are copied in a 
similar picture quality. (Low text 
recognition level)

AR-C260/C260M  SETTING AND ADJUSTMENTS  8 - 36

This adjustment must be performed in the following cases:

• When the fusing section is disassembled.

• When a fusing trouble occurs.

• When wrinkles are generated on paper in the fusing section.

1) Select A4 (8.5 x 11) paper.

2) With the document cover open, press the start key of monochrome

copy.

3) A copy of black background is made.

4) Open the left door.

5) Insert paper into the pre-transfer paper guide, and turn the fusing

roller knob.

6) With the paper squeezed in the pre-transfer paper guide, wait for

about 10sec.

7) Turn the fusing roller knob to remove the paper from the fusing

section.

8) Measure the dimension (L) of the center section of the glittering

line made by the fusing roller. Check that the dimension is in the
specified range.

Check that the pressure balance between the front and the rear
frame sides is proper.

Value L = About 5.5mm

If the above conditions are not satisfied, perform the following proce-
dure.

9) Turn the pressure adjustment screw on the front and the rear

frame sides of the fusing unit to adjust the fusing pressure.

Repeat procedures 2) to 9) until the condition of procedure 8) is satis-
fied.

This adjustment must be performed in the following cases:

• When the fusing section is disassembled.

• When a paper jam occurs in the fusing section.

• When wrinkles are generated on paper in the fusing section.

• When image deflection or unclear image is produced in the paper

rear edge area. 

The standard fixing position is at the center. However, change the
position depending on the situations.

• When wrinkles are made on paper, shift the position upward. 

• When image deflection or unclear image is produced in the paper

rear edge area, shift the position downward.

LR

L (Center)

LF

LR = LF