Toshiba e-studio 2330c, e-studio 2820c, e-studio 2830c, e-studio 3520c, e-studio 3530c Imaging Manual

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File No. SME08000600 R080621G0900-TTEC Ver00_2008-08

Under the copyright laws, this manual cannot be reproduced in any form without prior written

permission of TOSHIBA TEC CORPORATION. No patent liability is assumed, however, with respect

to the use of the information contained herein.

Revision Record

File No. SME08000600

Date Rev.No Item Descriptions Remarks

The Imaging Manual is intended for customers using the Toshiba e-STUDIO2330C/2820C/2830C/3520C/

3530C/4520C with a variety of specific needs and inquiries for high image quality, such as:

x How to obtain a clearer copy image x How to maintain the current image quality x How to make the text look sharper on the copy

The Toshiba MFPs are factory-configured to provide image quality settings that satisfy the majority of customers.

However, these settings may not be necessarily optimal for the specific needs of all customers. Proper image

quality adjustments can satisfy such needs. Most of the adjustments described in this manual must be performed

by a service technician, but a few of them can also be performed by the customer.

It is strongly recommended that this manual be fully utilized by not only the service technician, but also the sales

representative, who also has opportunities of obtaining customer feedback on the image quality. This manual

helps the sales representative to study and comprehend what kind of customer requirements for image quality

can be satisfied, to make proposals to customers to improve image quality, and to communicate the customers’

specific requirements with ease to the service technician. In addition, this manual is expected to facilitate the

marketing of Toshiba MFPs to prospective customers that have a specific demand for image quality and the

expansion of sales.

The adjustments described in this manual are all based on the requests of actual customers. Meeting their

specific wishes will only add to their satisfaction.

Please remember to read "Precautions after the completion of the adjustment," to which you must pay close

attention, after finishing the adjustment.

Precautions in Servicing

• For adjustments to be performed by the service technician, the precautions given in the Service Manual must be

stringently followed. The adjustments must be performed by a qualified service technician who has completed

the service training course.

• The default listed mentioned in this manual may be different from the actual ones, due to the timing of shipping

(firmware version). But note that the recommended values and acceptable value range stated in this manual

remain the same.

Purpose of the Imaging Manual

Icons

The following icons used in this manual denote the following:

: • Copy ——— An adjustment having an effect on copying in the Black mode (excluding

the Image smoothing mode)

• Printer ——– An adjustment having an effect on Black and White mode printing

* The adjustment will be effective, if "Black and White" is selected from

among the "Color" options on the Windows printer driver or if "Mono"

is selected from among the "Color Type" options on the Macintosh print

dialog.

• Scan ——— An adjustment having an effect on scanning in the Black mode

: • Copy ——–– An adjustment having an effect on copying in the Image smoothing mode

in the Black mode

• Scan ——— An adjustment having an effect on scanning in the Gray scale mode

: • Copy ——— An adjustment having an effect on copying in the Full color mode

• Printer ——– An adjustment having an effect on full-color printing

* The adjustment will be effective, if "Auto" or "Color" is selected from

among the "Color" options on the Windows printer driver or if "Auto" or

"Color" is selected from among the "Color Type" options on the

Macintosh print dialog.

• Scan ——— An adjustment having an effect on scanning in the Full color mode

: • Copy ——— An adjustment having an effect on copying in the Auto color mode

• Scan ——— An adjustment having an effect on scanning in the Auto color mode

: An adjustment having an effect on printing with the Windows PCL6 emulation printer

driver

: An adjustment having an effect on printing with the Windows PS3 emulation printer

driver

: An adjustment having an effect on printing with the Windows PSX emulation printer

driver

: An adjustment having effect on printing with the Macintosh printer driver

: An adjustment having an effect on an image stored in the e-Filing box by the scanning

functions (including Scan to Box, Scan to File and Scan to E-mail)

: An adjustment having an effect on an image stored in the e-Filing box by the copying

functions (Copy to Box)

: An adjustment having an effect on an image stored in the e-Filing box by the printing

functions (Print to Box)

: An adjustment having an effect on an image stored in the e-Filing box by the Fax and

Internet Fax functions (including Received Fax to Box and Received Internet Fax to Box)

PCL6

PS3

Scan to Box

Copy to Box

Print to Box

Fax to Box

Mac

Purpose of the Imaging Manual

XPS

1. General Adjustments – Copying, Printing and e-Filing (Output from Box)

1.1 To Obtain a Darker Image ............................................................................1-1

1.2 To Adjust the Density of an Entire Copy .......................................................1-5

1.2.1 To Adjust the Density on a Solid Colored Image............................................1-5

1.2.2 To Adjust the

Density on a Photo or Gradational Image ...............................1-8

1.3 To Achieve the Image Quality Most Suitable for the Paper Used

(To eliminate blur and graininess from an image)................1-11

1.4

To Minimize Variations in the Image Quality under the Operating Conditions

(To optimally program image quality control)......................1-16

1.5 To Correct Out-of-Registration Colors ........................................................1-22

2. Copier-specific Adjustments

2.1 To Copy Text Clearly (To eliminate faint, smudged or blurred text) .........................2-1

2.1.1 To Adjust the Copy Image Quality in the Black Mode .................................... 2-2

2.1.2 To Adjust the Copy Image Quality in the Full Color Mode.............................. 2-5

2.1.3 To Adjust the Copy Image Quality in the Auto Color Mode ............................2-7

2.2 To Closely Match the Color Balance of the Original ...................................2-10

2.3 To Improve the Reproducibility of Gray.......................................................2-14

2.4 To Copy in Vivid Colors ..............................................................................2-16

2.5 To Make the Pale Area of the Original Look Darker and Sharper

(To improve the highlight reproducibility)...........................2-20

2.6 To Eliminate the Background Color ............................................................2-23

2.6.1 To Adjust the Copy Image Quality in the Black Mode .................................. 2-24

2.6.2 To Adjust the Copy Image Quality in the Full Color Mode............................ 2-26

2.7 To Avoid Copying the Image Seen through the Back

of a Page Printed on Thin Paper .............................2-29

2.7.1 To Adjust the Copy Image Quality in the Black Mode .................................. 2-30

2.7.2 To Adjust the Copy Image Quality in the Full Color Mode............................ 2-33

2.8 To Eliminate Moiré ................................................................................2-35

2.9 To Copy Sharply (To enhance sharpness) .......................................................2-39

2.10 To Make Photo Edges Look Softer .............................................................2-42

2.11 To Make Solid Filled Bold Text (Logo) Highly Colored................................2-47

2.11.1 To Adjust the Copy Image Quality of a Black Logo ..................................2-48

2.11.2 To Adjust the Copy Image Quality of a Colored Logo...............................2-50

2.12 To Sharply Contrast the Hues of Highlighters on the Copy.........................2-52

2.13 To Obtain a Good Color Balance on Thick Paper.......................................2-55

2.14 To Obtain Smooth Gray-Scale Photo Images.............................................2-59

2.15 To Change the Threshold in Auto Color Mode

(

To change the threshold between

the Full Color mode and the Black mode to meet the user’s needs

)

..............2-61

2.16 To Adjust the Twin-Color Copy Image Quality ............................................2-64

Table of Contents

2.16.1 To Adjust the Tint of Colors other than Black ........................................... 2-65

2.16.2 To Adjust the Reproducibility of Black in the Red and Black Mode ..........2-66

2.16.3 To Adjust the Boundary between Black and Colors other than Black.......2-67

2.17 To Adjust the Image Quality Scanned from the RADF................................2-68

2.18 To Program Frequently Used Copy Settings (To Use Custom Mode) .............2-71

2.18.1 To Adjust Custom Mode Settings in Black Mode...................................... 2-71

2.18.2 To Adjust Custom Mode Settings in Color Mode...................................... 2-76

2.19 To Copy While Erasing Shadow Outside of Image .....................................2-80

2.20 To Avoid Copying Blank Page of Original Scanned with RADF..................2-81

2.21 To Obtain Image in Even Density Level......................................................2-83

3. Printer-specific Adjustments

3.1 To Maintain a Steady Color Balance.............................................................3-1

3.2 To Maintain a Steady Color Balance on Thick Paper or Special Paper ..............3-3

3.3 To Obtain the Desired Color Balance ...........................................................3-5

3.4 To Closely Match the Color Balance on the Monitor...................................3-13

3.5 To Maintain a Uniform Gray Hue (To maintain Consistency in Gray among Text,

Photos and Graphics

) ...................................................3-16

3.6 To Use Only the Black Toner to Reproduce Gray Areas (

To use only the black toner

to reproduce black-and-white photos or gradational images

) .....3-19

3.7 To Easily Adjust the Overall Brightness ......................................................3-23

3.8 To Adjust the Overall Saturation .................................................................3-26

3.9 To Easily Adjust the Overall Contrast .........................................................3-30

3.10 To Obtain a Sharper Print Image ................................................................3-33

3.11 To Obtain a Softer Image............................................................................3-36

3.12 To Make Low-resolution Data Look Finer

(

To soften an image

)

..........................3-39

3.13 To Eliminate Smudges from Highly Colored Text and Lines (

To prevent toner

scattering around text and lines where a large amount of toner is used

) .....3-42

3.14 To Clearly Print Light-Colored Thin Lines or Text .......................................3-46

3.14.1 To Adjust the Print Image Quality in the Color Mode................................3-47

3.14.2 To Adjust the Print Image Quality in the Black and White Mode ..............3-55

3.15 To Make the Light-Colored Area Darker on the Printout .............................3-59

3.16 To Clearly Print Thin Lines/Double Lines....................................................3-65

3.17 To Decrease the Image Density and Save Toner

(To Print in the Toner Save Mode)...................................3-68

3.18 To Adjust the Image Density in the Toner Save Mode................................3-71

3.19 To Print Illegible Gray or Colored Text in Black ..........................................3-74

3.20 To Ignore Blank Pages for Printing .............................................................3-76

3.21 To Sharply Print Black Text ........................................................................3-79

3.22 To Prevent Dark Toner from Coming Off ....................................................3-89

Table of Contents

iii

3.23

To Register the Image Quality Adjusted Corresponding to a Preference

(To use the Custom Color Settings).................................3-91

3.24 To Print a Full-Color Original in Two Colors................................................3-94

3.24.1 To Adjust Colors ....................................................................................... 3-95

3.24.2 To Adjust the Sharpness ........................................................................3-100

3.24.3 To Print a Full-Color Original in Two Colors ...........................................3-102

4. e-Filing-specific Adjustments

4.1 To Clearly Store a B/W Image in the Auto Color Mode.................................4-1

4.2 To Store an Original while Reducing the File Size........................................4-3

4.3 To Store a Color Photo Image, while Minimizing Moiré ................................4-5

4.4 To Match the Color Balance on the Original

(To adjust the color balance in Print to Box).........................4-7

4.5 To Scan and Print, while Minimizing Moiré ...................................................4-9

4.6 To Finely Print the Image Stored in the e-Filing box (

To print images stored through Copy to Box or Print to Box

) ........4-11

4.7 To Store an Image Suitable for Displaying

on the Monitor or Image Editing ..............................4-13

4.8 To Finely Print Color Images Scanned and Stored

(To print images stored through Scan to Box) ....................4-15

4.9 Appendix ...................................................................................................4-17

5. Scanning-specific Adjustments

5.1 To Clearly Scan Text (To reduce noise around text)............................................5-1

5.2 To Scan an Original, while Eliminating the Background Color

(To eliminate the background density)................................5-3

5.3 To Clearly Scan and Print an Original in Black and White

(To improve gradation and reduce graininess) .....................5-5

5.4 To Scan the Original, while Reducing the File Size ......................................5-7

5.4.1 To Reduce the File Size by Changing the Options

when Scanning the Original ..............................................5-8

5.4.2 To Reduce the File Size in Slim PDF ........................................................... 5-11

5.5 To Sharply Scan the Original (To increase the sharpness intensity)....................5-13

5.6 To Scan an Original, while Enhancing Black ..............................................5-15

5.7 To Scan an Original with the Desired Gradation.........................................5-17

5.8

To Register the Original Mode Optimal for a Particular Type of Original

(To have "Custom" selected)..........................................5-19

Table of Contents

1-1

1.1 To Obtain a Darker Image

Before the adjustment After the adjustment

The output image looks light and blurred. The output image looks darker and sharper.

 Explanation

When an original containing photo images or gradational images is printed, the output image sometimes looks

light and blurred. Perform image quality control or automatic calibration, and adjust the transfer roller bias

output, in order to obtain a darker and sharper image.

 Procedures

* Perform the adjustment in accordance with the procedures below.

* Only the service technician must use procedures (1), (3) and (4).

* Both the service technician and the user can use procedure (2).

(1) Enter adjustment mode [05]. Select code [396]. Press the [START] button.

• Image quality control will be forcibly performed to correct variations in density.

After exercising image quality control, use the next procedure.

(2) Perform automatic calibration to correct variations in image density.

* "ADMIN" is selected from among the "CALIBRATION DISPLAY LEVEL" options by default. In other

words, an administrator is authorized to operate automatic calibration. But "USER" can also be selected to

allow the user to operate it. Refer to the User Functions Guide for further information regarding how to

select the "CALIBRATION DISPLAY LEVEL" option.

1. General Adjustments – Copying, Printing and e-Filing (Output from Box)

1-2

To adjust the copy image quality

Use steps (a) through (i) to perform automatic calibration.

(a) Press the [USER FUNCTIONS] button on the Control Panel to enter the "User Functions" menu.

(b) Press the [ADMIN] tab.

(d) Press the [GENERAL] button.

(e) Press the [CALIBRATION] button.

(f) Press the [COPY] button.

(g) Press the [CALIBRATION] button to print out the test chart.

(h) Place the printed test chart on the original glass.

(i) Press the [START] button to perform calibration. When the calibration comes to an end, the message

"Scanning and calibrating" will disappear.

* As a result of the above steps, the copy image quality will be corrected in the Full Color mode and

Black and White mode simultaneously.

* To correct variations in image density by performing automatic calibration for each paper type, refer

to “(1) Perform automatic calibration for each paper type to correct variations in image density” in

“2.13 To Obtain a Good Color Balance on Thick Paper”.

To adjust the print image quality

Use steps (a) through (j) to perform automatic calibration.

(a) Press the [USER FUNCTIONS] button on the Control Panel to enter the "User Functions" menu.

(b) Press the [ADMIN] tab.

(d) Press the [GENERAL] button.

(e) Press the [CALIBRATION] button.

(f) Press the [PRINT] button.

(g) Press the [CALIBRATION] button to print out the test chart.

(h) Place the printed test chart on the original glass.

(i) Press the [START] button to perform calibration. When the calibration comes to an end, the message

"Scanning and calibrating" will disappear.

(j) The message "Is a result made to reflect?" will appear. Press the [YES] button.

* To correct variations in image density by performing automatic calibration for each paper type, refer

to “3.2 To Maintain a Steady Color Balance on Thick Paper or Special Paper”.

After performing automatic calibration, print and check the image quality.

If further image quality adjustments are still necessary, use the next procedure.

1. General Adjustments – Copying, Printing and e-Filing (Output from Box)

1-3

(3) Enter adjustment mode [05]. Change the values for codes [2934 to 2937] to adjust the transfer (2nd

transfer) roller bias output.

(Adjust the offset voltage of transfer roller bias so as to increase the density of the image.)

• The code to use varies according to the paper type. Adjust the value for [05] code corresponding to the

paper type for which you would like to improve the image quality. Set the value within a range of "2" to

"8" to obtain the highest density of the image.

Paper type [05] code Subcode

Recommended

value

Acceptable

value range

Default

Plain paper 0

Thick 1 1 Thick 2 2 Thick 3 3

OHP 4 Special 1 5 Special 2 6

Recycled paper

Front

Thick 4

05-2934

2 to 8 0 to 10 5

Plain paper 0

Thick 1 1 Thick 2 2 Thick 3 3

OHP 4 Special 1 5 Special 2 6

Recycled paper

Full color

Back

Thick 4

05-2935

2 to 8 0 to 10 5

Plain paper 0

Thick 1 1 Thick 2 2 Thick 3 3

OHP 4 Special 1 5 Special 2 6

Recycled paper

Front

Thick 4

05-2936

2 to 8 0 to 10 5

Plain paper 0

Thick 1 1 Thick 2 2 Thick 3 3

OHP 4 Special 1 5 Special 2 6

Recycled paper

Black

Back

Thick 4

05-2937

2 to 8 0 to 10 5

* "Front" refers to the printed side in the simplex mode or the side that is delivered facing downwards in the duplex

mode.

"Back" refers to the printed side that is delivered facing upwards in the duplex mode.

1. General Adjustments – Copying, Printing and e-Filing (Output from Box)

1-4

* The table below shows you the acceptable paper weight for the paper type.

Paper type Acceptable paper weight

Plain paper 64 to 105 g/m² 16 to 20 lb. Bond

Thick 1 106 to 163 g/m² Max. 60 lb. Cover Thick 2 164 to 209 g/m² Max. 110 lb. Index Thick 3 210 to 256 g/m² Max. 140 lb. Index Thick 4 257 to 280 g/m² Max. 150 lb. Index

• After adjusting the transfer roller bias output, perform automatic calibration in the same manner as in

procedure (2).

<Hint> The transfer voltage increases as the set value is increased. It is usually recommended that the

set value be increased, when you print on thick paper or paper with asperities on its surface. On

the other hand, the set value should be decreased, when you print on thin paper.

After adjusting the density, print and check the image quality.

If further image quality adjustments are still necessary, use the next procedure.

(4) Check the life of the consumables (particularly the drum, developer material and fuser unit) and replace

them, if necessary.

• When replacing any consumable, use steps (a) to (c).

(a) Enter the PM support mode. Reset the counter corresponding to the replaced consumable to "0."

* For further information regarding the PM support mode, refer to the Service Manual.

(b) Enter adjustment mode [05]. Select code [396]. Press the [START] button.

• Image quality control will be performed and the image quality control value will be initialized.

* After replacing any consumable, remember to reset the counter corresponding to it to "0." Otherwise, it

may cause a loss in MFP performance, including degradation in the image quality and a reduction in the

life of the consumables.

* While replacing any consumable, also check the slit glass in the laser optical unit, and thoroughly clean it,

if it is soiled.

 Precautions after the completion of the adjustment

Nothing in particular.

 Remarks

• Enter the value mentioned in the procedures or one within the recommended value range for the adjustment.

Otherwise, it may cause a loss in MFP performance, including degradation in the image quality and a reduction

in the life of the consumables.

• If printing on another type of paper causes a problem with the image quality after the adjustment, return the set

values (for codes 05-2934 to 2937) to the default (set value: 5) and then perform the adjustment again.

• When replacing any consumable, refer to the relevant information in the Service Manual and Service

Handbook.

1. General Adjustments – Copying, Printing and e-Filing (Output from Box)

1-5

1.2 To Adjust the Density of an Entire Copy

 Explanation

The density on a solid colored image and a photo or gradational image (halftones) can be adjusted as desired by

the user.

 Procedures

* The use procedure varies, depending on whether you are going to adjust the density on a solid colored image or

a photo or gradational image. Refer to "To Adjust the Density on a Solid Colored Image" in order to adjust the

density on a solid colored image. Refer or "To Adjust the Density on a Photo or Gradational Image" in order to

adjust the density on a gradational image (halftones).

1.2.1 To Adjust the Density on a Solid Colored Image

If the density is decreased If the density is increased

The solid colored area becomes lighter. The solid colored area becomes darker.

 Explanation

A particular color can be intensely darker or lighter, depending on the type of paper or original used. Adjust the

developer bias output, in order to adjust the amount of toner on the solid colored area and obtain the image

quality the user desires.

 Procedures

* The service technician must perform the adjustment in accordance with the procedures below.

1. General Adjustments – Copying, Printing and e-Filing (Output from Box)

1-6

(1) Enter setting mode [08]. Change the value to adjust the density of a solid area during the copying/printing

operation.

• Use steps (a) to (c) to perform the adjustment.

(a) Enter setting mode [08]. Change the values for codes [2513 to 2515] to adjust the developer bias

output value.

• Decreasing the value will make the solid colored area become lighter (decrease the amount of toner

on the solid colored area). On the other hand, increasing the value will make the solid colored area

become darker (increase the amount of toner on the area).

* The value to use varies according to the paper type and color to adjust. Check the code to use in

accordance with the following "Code" list, and refer to the "Value" list to select a proper value.

Code

Paper type Color to adjust [08] code Subcode

Y (yellow) 0 M (magenta) 1 C (cyan) 2

Plain paper

K (black)

08-2513

Y (yellow) 0 M (magenta) 1 C (cyan) 2

Full color

Thick

K (black)

08-2514

Black 08-2515 ---

Value

Correction value for developer bias

output

Density of the solid colored

area

0 Value automatically set −100 Light 1 Value automatically set −80

↑

2 Value automatically set −60

↑

3 Value automatically set −40

↑

4 Value automatically set −20

↑

5 Value automatically set

↑

6 Value automatically set +20 Default 7 Value automatically set +40

↓

8 Value automatically set +60

↓

9 Value automatically set +80

↓

10 Value automatically set +100 Dark

<Hint> Adjust the values for the following codes, in order to adjust colors with RGB.

Adjustment of R (Red): Adjust Y (Yellow) and M (Magenta).

Adjustment of G (Green): Adjust Y (Yellow) and C (Cyan).

Adjustment of B (Blue): Adjust M (Magenta) and C (Cyan).

(b) Enter adjustment mode [05]. Select code [396]. Press the [START] button.

• Image quality control will be forcibly performed and the image density will be corrected.

1. General Adjustments – Copying, Printing and e-Filing (Output from Box)

1-7

<Note> The above corrections will be effective immediately after the values for codes [08-2513

to 2515] are changed. After changing the values for codes [08-2513 to 2515], remember

to perform image quality control for code 05-396.

Repeatedly use steps (a) to (c) as necessary, to select a proper value.

If further image quality adjustments are still necessary, use the next procedure.

(2) Check the life of the consumables (particularly the drum, developer material and transfer belt unit) and

replace them, if necessary.

• When replacing any consumable, use steps (a) to (b).

(a) Enter the PM support mode. Reset the counter corresponding to the replaced consumable to "0."

* For further information regarding the PM support mode, refer to the Service Manual.

(b) Enter adjustment mode [05]. Select code [396]. Press the [START] button.

• Image quality control will be performed and the image quality control value will be initialized.

* After replacing any consumable, remember to reset the counter corresponding to it to "0." Otherwise, it

may cause a loss in MFP performance, including degradation in the image quality and a reduction in the

life of the consumables.

* While replacing any consumable, also check the slit glass in the laser optical unit, and thoroughly clean it,

if it is soiled.

 Precautions after the completion of the adjustment

• The adjustment may possibly cause an increase in the amount of toner consumed, scattering of the toner,

diminished photo images or gradations (less accurate reproducibility of halftones), extremely dark images

(decreased resolving power), extremely light images (faint thin lines), and shorten the life of the consumables.

Therefore, carefully perform the adjustment, while checking the copy or print image.

• No effect of the adjustment may appear, depending on the operating environment of the MFP. Therefore,

carefully perform the adjustment, while checking the copy or print image.

 Remarks

• The effect of the adjustment may vary, depending on the usage pattern of the consumables, such as the

developer material and drum, and the operating environment of the MFP.

• When replacing any consumable, refer to the relevant information in the Service Manual and Service Handbook.

1. General Adjustments – Copying, Printing and e-Filing (Output from Box)

1-8

1.2.2 To Adjust the Density on a Photo or Gradational Image

If the density is decreased If the density is increased

An original containing halftones, such as a photo image becomes lighter.

An original containing halftones, such as a

photo image becomes darker.

 Explanation

A particular color can be intensely darker or lighter, depending on the type of paper or original used. Adjust the

intensity of the laser, in order to adjust the density on the photo or gradational image (halftones) and obtain the

image quality the user desires.

 Procedures

* The service technician must perform the adjustment in accordance with the procedures below.

1. General Adjustments – Copying, Printing and e-Filing (Output from Box)

1-9

(1) Enter setting mode [08]. Change the value to adjust the image density of halftones during the

copying/printing operation.

• Use steps (a) to (c) to perform the adjustment.

(a) Enter setting mode [08]. Change the values for codes [2525 to 2525] to correct the intensity of the

laser.

• Decreasing the value will make a photo or gradational image become lighter, easily blurring the

image, but it will increase the gradation. On the other hand, increasing the value will make the

photo or gradational image become darker and clearer, but it will decrease the gradation.

* The value to use varies according to the paper type and color to adjust. Check the code to use in

accordance with the following "Code" list, and refer to the "Value" list to select a proper value.

Code

Paper type Color to adjust [08] code Paper type

Y (yellow) 0 M (magenta) 1 C (cyan) 2

Plain paper

K (black)

08-2525

3 Y (yellow) 0 M (magenta) 1 C (cyan) 2

Full color

Thick

K (black)

08-2526

Black 08-2527 ---

Value

Value Correction value for intensity of the laser

Density on the photo/gradational image

0 Value automatically set −100 Light (gradation: more) 1 Value automatically set −80

↑

2 Value automatically set −60

↑

3 Value automatically set −40

↑

4 Value automatically set −20

↑

5 Value automatically set Default 6 Value automatically set +20

↓

7 Value automatically set +40

↓

8 Value automatically set +60

↓

9 Value automatically set +80

↓

10 Value automatically set +100 Dark (gradation: less)

<Hint> Adjust the values for the following codes, in order to adjust colors with RGB.

Adjustment of R (Red): Adjust Y (Yellow) and M (Magenta).

Adjustment of G (Green): Adjust Y (Yellow) and C (Cyan).

Adjustment of B (Blue): Adjust M (Magenta) and C (Cyan).

1. General Adjustments – Copying, Printing and e-Filing (Output from Box)

1-10

(b) Enter adjustment mode [05]. Select code [396]. Press the [START] button.

• Image quality control will be forcibly performed and the image density will be corrected.

<Note> The above corrections will be effective immediately after the values for codes [08-2525

to 2527] are changed. After changing the values for codes [08-2525 to 2527], remember

to perform image quality control for code 05-396.

Repeatedly use steps (a) to (c) as necessary to select a proper value.

If further image quality adjustments are still necessary, use the next procedure.

(2) Check the life of the consumables (particularly the drum, developer material and transfer belt unit) and

replace them, if necessary.

• When replacing any consumable, use steps (a) to (b).

(a) Enter the PM support mode. Reset the counter corresponding to the replaced consumable to "0."

* For further information regarding the PM support mode, refer to the Service Handbook.

(b) Enter adjustment mode [05]. Select code [396]. Press the [START] button.

• Image quality control will be performed and the image quality control value will be initialized.

* After replacing any consumable, remember to reset the counter corresponding to it to "0." Otherwise, it

may cause a loss in MFP performance, including degradation in the image quality and a reduction in the

life of the consumables.

* While replacing any consumable, also check the slit glass in the laser optical unit, and thoroughly clean it,

if it is soiled.

 Precautions after the completion of the adjustment

• The adjustment may possibly provide extremely dark images (decreased resolving power, inadequate

reproducibility of gradations), and extremely light images (blurred images, faint thin lines). Therefore,

carefully perform the adjustment, while checking the copy or print image.

• No effect of the adjustment may appear, depending on the operating environment of the MFP. Therefore,

carefully perform the adjustment, while checking the copy or print image.

 Remarks

• The effect of the adjustment may vary, depending on the usage pattern of the consumables, such as the

developer material and drum, and the operating environment of the MFP.

• When replacing any consumable, refer to the relevant information in the Service Manual and Service Handbook.

1. General Adjustments – Copying, Printing and e-Filing (Output from Box)

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1.3 To Achieve the Image Quality Most Suitable for the Paper Used

(To eliminate blur and graininess from an image)

Before the adjustment After the adjustment

The image looks grained, depending on the type of paper.

A clear image quality, most suitable for a type

of paper used, is obtained.

 Explanation

The image sometimes looks slightly blurred or grained on the copy or printout, depending on the type of paper

used. Adjust the transfer roller bias output and the fuser temperature, in order to achieve the image quality most

suitable for the paper used.

 Procedures

*All the steps in the adjustment must be performed by the service technician. The procedure to be followed

differs depending on the purpose as follows:

• To adjust halftone image: Go to step (1)

• To adjust images on the high-density area (only when recycled paper is used): Go to step

(1) Enter adjustment mode [05]. Change the values for codes [2934 to 3937] to adjust the transfer (2nd

transfer) roller bias output.

(Adjust the offset voltage of transfer roller bias so as to optimize the halftones.)

• The code to use varies according to the paper type. Adjust the value for [05] code corresponding to the

paper type for which you would like to improve the image quality. Set the value within a range of "2" to

"8" to optimize the halftones.

1. General Adjustments – Copying, Printing and e-Filing (Output from Box)

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Paper type [05] code Subcode

Recommended

value

Acceptable

value range

Default

Plain paper 0

Thick 1 1 Thick 2 2 Thick 3 3

OHP 4 Special 1 5 Special 2 6

Recycled paper

Front

Thick 4

05-2934

2 to 8 0 to 10 5

Plain paper 0

Thick 1 1 Thick 2 2 Thick 3 3

OHP 4 Special 1 5 Special 2 6

Recycled paper

Full color

Back

Thick 4

05-2935

2 to 8 0 to 10 5

Plain paper 0

Thick 1 1 Thick 2 2 Thick 3 3

OHP 4 Special 1 5 Special 2 6

Recycled paper

Front

Thick 4

05-2936

2 to 8 0 to 10 5

Plain paper 0

Thick 1 1 Thick 2 2 Thick 3 3

OHP 4 Special 1 5 Special 2 6

Recycled paper

Black

Back

Thick 4

05-2937

2 to 8 0 to 10 5

* "Front" refers to the printed side in the simplex mode or the side that is delivered facing downwards in the duplex

mode.

"Back" refers to the printed side that is delivered facing upwards in the duplex mode.

* The table below shows you the acceptable paper weight for the paper type.

Paper type Acceptable paper weight

Plain paper 64 to 105 g/m² 16 to 20 lb. Bond

Thick 1 106 to 163 g/m² Max. 60 lb. Cover Thick 2 164 to 209 g/m² Max. 110 lb. Index Thick 3 210 to 256 g/m² Max. 140 lb. Index Thick 4 257 to 280 g/m² Max. 150 lb. Index

• After adjusting the transfer roller bias output, perform automatic calibration.

* For further information regarding the procedures, refer to procedure (2) in 1.1 To Obtain a Darker Image.

1. General Adjustments – Copying, Printing and e-Filing (Output from Box)

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<Hint> The transfer voltage increases as the set value is increased. It is usually desirable that the set

value be decreased to obtain a clearly highlighted area.

After performing the adjustment, print and check the image quality.

If further image quality adjustment is necessary, go to step (3).

(2) If the image on the high-density area looks grained on plain paper other than the TOSHIBA-recommended

one is used, select “recycled paper” as a paper type.

* To select the paper type, refer to the Operator’s Manual for Copying Guide.

• If fine adjustment of image quality in the recycled paper mode is required in accordance with the paper

type, follow the steps from (a) to (b) below.

(a) Enter the adjustment mode [05]. Change the value of the codes [2934] to [2937] to adjust (2nd)

transfer bias output. (In this step the transfer roller bias offset voltage is adjusted to print the high-

density area or the halftone area of the image most clearly.)

Paper type [05] code

Subco

Recom

mended

value

Accepta

ble value

range

Default

Front

Recycled

paper

05-2934 7 2 to 8 0 to 10 5

Full color

Back

Recycled

paper

05-2935 7 2 to 8 0 to 10 5

Front

Recycled

paper

05-2936 7 2 to 8 0 to 10 5

Black

Back

Recycled

paper

05-2937 7 2 to 8 0 to 10 5

* “Front” refers to the printed side in the simplex mode or the side that is delivered facing

downwards in the duplex mode.

”Back” refers to the printed side that is delivered facing upwards in the duplex mode.

• After adjusting the transfer roller bias output, perform automatic calibration.

* Refer to step (2) in “1.1 To Obtain a Darker Image”.

<Hint> The larger the setting value is, the more the transfer voltage increases. It is usually

recommended that the set value be increased when you print on thick paper or paper with

asperities on its surface. On the other hand, the set value should be decreased when you print on

thin paper.

After setting the value, print and check the image quality.

If further image quality adjustment is necessary, go to step (b).

1. General Adjustments – Copying, Printing and e-Filing (Output from Box)

1-14

(b) Enter the setting mode [08]. Change the value of the codes [5293] to [5296] to adjust fusing

temperature in the recycled paper mode. (In this step fusing temperature is adjusted to print the

high-density area of the image most clearly.)

Adjustment

Paper

type

[08]

code

Subco

Recomm

ended

value

able

value

range

Default

Normal temp /

Black

Normal temp /

Color

3 to 8 0 to 16

• e-STUDIO4520c /4530c: 5

• Others: 4

Low temp /

Black

Center

heater

Low temp /

Color

Recycled

paper

08-5293

3 to 8 0 to 16

• e-STUDIO4520c /4530c: 7

• Others: 6

Normal temp /

Black

Normal temp /

Color

3 to 8 0 to 16

• e-STUDIO4520c /4530c: 5

• Others: 4

Low temp /

Black

Side

heater

Low temp /

Color

Recycled

paper

08-5294

3 to 8 0 to 16

• e-STUDIO4520c /4530c: 7

• Others: 6

Normal temp /

Black

Normal temp /

Color

3 to 8 0 to 16 5

Low temp /

Black

Sub

heater

Low temp /

Color

Recycled

paper

08-5295

3 to 8 0 to 16 7

Normal temp /

Black

Normal temp /

Color

2 to 6 0 to 16 4

Low temp /

Black

Pressure

roller

Low temp /

Color

Recycled

paper

08-5296

2 to 6 0 to 16 4

• After adjusting the fusing temperature, perform automatic calibration.

* Refer to step (2) in “1.1 To Obtain a Darker Image”.

<Hint> The smaller the setting value is, the lower the fusing temperature becomes. It is usually

recommended that the set value be decreased in order to suppress roughness on the high-density

area of the image. Adjust the value while checking the image carefully because if the value is

too small, insufficient fusing may occur.

Since temperatures on the long side of the paper cannot be kept in a proper balance, the same

value must be set for the [08] codes [5293] and [5294] unless otherwise required so.

After setting the value, print and check the image quality.

If further image quality adjustment is necessary, go to step (3).

1. General Adjustments – Copying, Printing and e-Filing (Output from Box)

1-15

(3) Check the life of the consumables (particularly the drum, developer material and fuser unit) and replace

them, if necessary.

• When replacing any consumable, use steps (a) to (c).

(a) Enter the PM support mode. Reset the counter corresponding to the replaced consumable part to "0."

* For further information regarding the PM support mode, refer to the Service Manual.

(b) Enter adjustment mode [05]. Select code [396]. Press the [START] button.

• Image quality control will be performed and the image quality control value will be initialized.

* For further information regarding the procedures, refer to procedure (2) in 1.1 To Obtain a Darker

Image.

* After replacing any consumable, remember to reset the counter by making it correspond to "0." Otherwise,

it may cause a loss in MFP performance, including degradation in the image quality and a reduction in the

life of the consumables.

* While replacing any consumable, also check the slit glass in the laser optical unit, and thoroughly clean it,

if it is soiled.

 Precautions after the completion of the adjustment

After the fusing temperature was adjusted in step (2) above, printing interruption may occur due to improper

fusing temperature. Therefore adjust the value carefully. If you want to change the conditions for printing

interruption, change the value of the [08] code [5409] (abnormality process starting temperature setting /

recycled paper). For the setting values, refer to the Service Manual.

 Remarks

• Enter the value mentioned in the procedures or one within the recommended value range for the adjustment.

Otherwise, it may cause a loss in MFP performance, including degradation in the image quality and a reduction

in the life of the consumables.

• The desired image quality may not be obtained, depending on the type of paper used. In this case, use the

recommended paper and then print or adjust the image quality.

• If an image problem occurs when you use the other paper type, temporarily set the values of the [08] codes

[2934] to [2937] (bias offset) and [5293] to [5296] (fusing temperature during printing) back to the default ones.

Then perform the adjustment again.

• When replacing any consumable, refer to the relevant information in the Service Manual and Service Handbook.

1. General Adjustments – Copying, Printing and e-Filing (Output from Box)

1-16

1.4

To Minimize Variations in the Image Quality under the Operating Conditions

(To optimally program image quality control)

Before the adjustment After the adjustment

The image contrast varies, depending on the date and time when copying or printing is performed or the type of job.

The image quality is constantly maintained.

1. General Adjustments – Copying, Printing and e-Filing (Output from Box)

1-17

 Explanation

The image contrast may vary, depending on the date and time when copying or printing is performed or the type

of copy/print job. To constantly maintain image quality, shorten the waiting period until image quality control is

performed.

 Procedures

* The service technician must perform the adjustment in accordance with the procedures below.

(1) Enter setting mode [08]. Change the value for code [566], [570] or [572] to specify the best interval during

which image quality control should be performed, according to use of the MFP.

The MFP is installed in a place where the temperature and humidity vary widely:

Set "1" (value × 5%R.H.) for code 08-570 to increase the frequency of image quality control, in response to

a change in humidity.

* Image quality control will be performed, when the relative humidity changes in accordance with the

specified difference from the previous image quality control. If the difference in the relative humidity

exceeds the specified value, image quality control is performed first. Then a copy or print job will be

performed.

Value for 08-570 Difference in relative humidity

1 5%R.H. 2 10%R.H. (default)

• After setting the value for code 08-570, forcibly perform image quality control, as follows:

Enter adjustment mode [05]. Select code [396]. Press the [START] button.

1. General Adjustments – Copying, Printing and e-Filing (Output from Box)

1-18

To Have Uniform Variations in the Image Quality after Return from the Auto Power Save Mode:

Change the value of the [08] code [571] to change the conditions for starting image quality control (shorten

the period of time the MFP is left unused) after the MFP was recovered from the auto power save mode, so

that the image quality control will be easily performed.

* This adjustment will improve the image quality, but only if the sleep mode / auto shut off mode have been

disabled ("20" is set for code 08-206). Remember that there will be no positive affect on the image quality,

if the sleep mode / auto shut off mode have been enabled.

Value for

08-571

Period of time the MFP is left unused before starting image

quality control

3 minutes or longer (image quality control is performed before the paused job is resumed)

5 minutes or longer (image quality control is performed before the paused job is resumed)

10 minutes or longer (image quality control is performed before the paused job is resumed)

15 minutes or longer (image quality control is performed before the paused job is resumed)

20 minutes or longer (image quality control is performed before the paused job is resumed)

30 minutes or longer (image quality control is performed before the paused job is resumed)

45 minutes or longer (image quality control is performed before the paused job is resumed)

60 minutes or longer (image quality control is performed before the paused job is resumed)

90 minutes or longer (image quality control is performed before the paused job is resumed)

120 minutes or longer (default value - image quality control is performed before the paused job is resumed)

• After setting the value for code 08-571, forcibly perform image quality control, as follows:

Enter adjustment mode [05]. Select code [396]. Press the [START] button.

1. General Adjustments – Copying, Printing and e-Filing (Output from Box)

1-19

A large number of sheets are printed (hundreds of copies or more per day) and the image

quality needs to be constantly maintained:

Set the value for code 08-572 within a range of "1" to "9" (Value × 100 sheets) to reduce the accumulated

number of printed sheets. It will determine the interval until the next image quality control is performed.

* After a copy or print job is completed, if the accumulated number of printed sheets exceeds the specified

value, image quality control will be performed.

Value for 08-572

Accumulated number of printed sheets before image quality control is performed

1 to 9 100 to 900 sheets

10 1,000 sheets (default)

• After setting the value for code 08-572, forcibly perform image quality control, as follows:

Enter adjustment mode [05]. Select code [396]. Press the [START] button.

After performing the adjustment, print and check the image quality.

If further image quality adjustments are still necessary, use the next procedure.

(2) The image density or color during continuous printing on the plain paper can be stabilized by changing the

fusing related settings by means of the following procedures.

 Procedures

Follow the procedure below.

(a) Change the parameter of 08-5241-0 (Temperature correction in ready status, heat roller at normal

temperatures) to "0" (default: "2" (0 deg. C)) and reduce the set temperature by 10 deg. C.

(b) Change the parameter of 08-5241-1 (Temperature correction in ready status, pressure roller at normal

temperatures) to "0" (default: "2" (0 deg. C)) and reduce the set temperature by 10 deg C.

temperatures, color) to "9" (default: "0" (Invalid) and extend the pre-running time for the first

printing by 10 sec.

(d) Change the parameter of 08-5310-1 (Applicable period of pre-running time for the first printing) to

"0" (default: "8" (10 min.) and change the setting of "Pre-running for the first printing" to "Always

use".

* "Pre-running for the first printing" means the idling rotation of the Fuser Unit prior to printing.

<Notes>

• Confirm if the firmware version is the latest one before the setting. If not, update it to the latest one.

• After these settings, the machine may go into the “wait” status since the fusing temperature can not follow

depending on the usage conditions, such as low temperature, thick paper, just recovering after warming up, etc.

• After these settings, the fusing performance may degrade depending on the usage conditions, such as low

temperature, thick paper, just recovering after warming up, etc. In such a case, return the setting to default.

• These settings extend the First Print Out Time by the period of time required for pre-running of the first

printing.

• These settings always perform the pre-running for the first printing of each job by the time required for pre-

running of the first print. This results in reducing the life of consumables.

1. General Adjustments – Copying, Printing and e-Filing (Output from Box)

1-20

(3) Use the thick paper mode when you print on plain paper.

• If the thick paper mode is used, printing decelerates but image quality becomes more stable because

differences in color or temperatures during continuous printing will be reduced.

• Set the thick paper mode following steps (a) to (i) below.

(a) Press the [USER FUNCTIONS] button on the Control Panel to enter the “User Functions” menu.

(b) Press the [USER] tab.

(d) Select a drawer that you want to set for thick paper mode and paper size.

(e) Press [PAPER TYPE].

(f) Press [THICK 1].

(g) Enter the adjustment mode [05]. Then select the subcode “1” for the code [2934] and change the

setting value to “3”.

• Change the level of transfer roller bias offset in the color mode, the front side of paper.

* Check how the copy image changes carefully. The setting value may be changed to “4” or “2” if

required.

(h) Place paper to be used on the drawer that you selected in step (d) above.

(i) Perform automatic calibration.

* Refer to step (2) in “1.1 To Obtain a Darker Image”.

After setting the value, print and check the image quality.

If further image quality adjustment is necessary, go to the next step.

(4) Check the life of the consumables (particularly the drum, developer material and transfer belt unit) and

replace them, if necessary.

• When replacing any consumable, use steps (a) to (c).

(a) Enter the PM support mode. Reset the counter corresponding to the replaced consumable to "0."

* For further information regarding the PM support mode, refer to the Service Handbook.

(b) Enter adjustment mode [05]. Select code [396]. Press the [START] button.

• Image quality control will be performed and the image quality control value will be initialized.

* For further information regarding the procedures, refer to procedure (2) in 1.1 To Obtain a Darker

Image.

* After replacing any consumable, remember to reset the counter corresponding to it to "0." Otherwise, it

may cause a loss in MFP performance, including degradation in the image quality and a reduction in the

life of the consumables.

* While replacing any consumable, also check the slit glass in the laser optical unit, and thoroughly clean it,

if it is soiled.

1. General Adjustments – Copying, Printing and e-Filing (Output from Box)

1-21

 Precautions after the completion of the adjustment

• The adjustment may possibly slow down the copying or printing speed, extend the warm-up time when the

MFP is returned from the auto power save mode, and shorten the life of the consumables, because of an

increase in the number of times image quality control is performed. Therefore, carefully perform the

adjustment, while checking the copy or print image.

• Note the following when you print in thick paper mode in step (3):

• Printing speed decelerates to 17.5 sheets per minute (A4/LT) after the adjustment.

• The thick paper mode cannot be set for the LCF (Large Capacity Feeder, optional). Therefore the

maximum number of sheets acceptable for continuous printing should be the one for the drawer.

However in the copying mode, you can set the thick paper mode to more than one drawer and copy

more paper continuously with the automatic drawer change function.

• The density level of the halftone image may differ from that of the plain paper mode after the

adjustment.

• The PM counter value increases by 2 counts for 1 sheet of thick paper.

 Remarks

• Enter the value mentioned in the procedures or one within the recommended value range for the adjustment.

Otherwise, it may cause a loss in MFP performance, including slowdown in the copying or printing speed.

• When replacing any consumable, refer to the relevant information in the Service Manual and Service Handbook.

1. General Adjustments – Copying, Printing and e-Filing (Output from Box)

1-22

1.5 To Correct Out-of-Registration Colors

Before the adjustment After the adjustment

The text and background are misaligned or out of registration.

Text is aligned with the background and a clear

copy/print image is obtained.

 Explanation

Colors of text or a thin line are sometimes printed out of alignment. Perform color registration control, in order

to print or copy without out-of-registration colors.

 Procedures

* The service technician must perform the adjustment in accordance with the procedure below.

(1) Make sure that no out-of-registration colors are visible on an original.

(2) Check the direction in which colors are misaligned.

* This adjustment is intended to correct misaligned colors due to differences between the paper feeding

speed and rotating speed of the transfer belt. Therefore, it will be effective, only if colors are misaligned in

the paper feeding direction (or the secondary scanning direction). This adjustment cannot improve

misaligned colors in the direction perpendicular to paper feeding (or primary scanning) or in the secondary

scanning direction periodically (partially at regular intervals). Refer to "Troubleshooting for the Image 1)

Color deviation" in the Service Manual.

(3) Enter adjustment mode [05] and print out the test print pattern to correct out-of-registration colors.

(a) Enter adjustment mode [05]. Select code [4719]. Press the [START] button.

• Registration control will be forcibly performed.

(b) Enter code [104] corresponding to a desired test print pattern. Press the [FAX] button.

• Paper is fed from the drawer to print out a test print pattern.

Code Test print pattern Paper size No. of copies

104

Test print pattern for identifying

out-of-registration colors

A3/LD 2

* Jot down the "paper feeding direction" on the printed test print pattern beforehand. This facilitates

identifying out-of-registration colors in the subsequent adjustment. Use only the second page of

the test print pattern.

Paper feeding direction Paper feeding direction

1. General Adjustments – Copying, Printing and e-Filing (Output from Box)

1-23

(4) Check the second page of the printed test print pattern to identify a pattern for the out-of-registration colors.

* There are 2 patterns for the out-of-registration colors. Check which pattern the out-of-registration colors to

adjust on the body are included.

Pattern A for out-of-registration colors

Pattern B for out-of-registration colors

Paper feeding speed

faster than transfer belt

rotating speed

Paper feeding direction

Patch eliminated at

the trailing edge

Patch eliminated at

the leading edge

Page 2

Paper feeding speed

slower than transfer belt

rotating speed

Black belt at the leading edge in the paper feeding direction

Paper feeding direction

Patch eliminated at

the leading edge

Patch eliminated

trailing edge

Page 2

Page number

1. General Adjustments – Copying, Printing and e-Filing (Output from Box)

1-24

(5) Finely adjust the rotating speed of the registration motor, in accordance with a pattern for the out-of-

registration colors.

• Use steps (a) to (b) to perform the adjustment.

(a) Enter adjustment mode [05]. Select code [483]. Finely adjust the rotating speed of the registration

motor.

• Adjust the values in accordance with a pattern for the out-of-registration colors as shown in the

table below.

Pattern for

out-of-

registration

colors

[05] code Subcode Recommended value

Acceptable

value range

Default

Pattern A

123 to 127

(Set a value smaller than 128)

Pattern B

05-483 0

129 to 132

(Set a value larger than 128)

0 to 255 128

(b) After performing registration control, print out the test print pattern to check whether the misaligned

colors have been improved.

* For further information regarding the adjustment procedures, refer to procedures (3) and (4).

* Repeatedly use procedures (3) to (5) as necessary, to select a proper value.

<Hint> When subcode "0" is adjusted for code 05-483, the correlation between the paper feeding speed

and rotating speed of the transfer belt will be corrected in every paper mode. However, when

colors are misaligned on an image printed in the thick paper mode after the adjustment for

subcode "0", adjust subcode "3" (during deceleration in the thick paper mode).

* For subcode "3," use the steps and recommended values for subcode "0."

* Paper for printing a test print pattern will only be fed from the drawer. Load the desired

number of sheets of thick paper in the drawer, in order to print the test print pattern on thick

paper.

* Adjust subcode "0" and then subcode "3," in order to adjust only misaligned colors in the thick

paper mode.

1. General Adjustments – Copying, Printing and e-Filing (Output from Box)

1-25

 Precautions after the completion of the adjustment

Nothing in particular.

 Remarks

• Enter a value within the recommended value range mentioned in the procedures. Otherwise, it may cause a

loss in MFP performance, including degradation in the image quality.

•Out-of-registration colors cannot always be perfectly corrected; this depends on the type of text or lines to print.

• Also, refer to the relevant information in the Service Manual for further information regarding color

registration control procedures.

1. General Adjustments – Copying, Printing and e-Filing (Output from Box)

1-26

1. General Adjustments – Copying, Printing and e-Filing (Output from Box)

2-1

2.1 To Copy Text Clearly (To eliminate faint, smudged or blurred text)

Before the adjustment After the adjustment

When a light print image is copied, the text looks blurred.

The graphic image and text look darker and

sharper.

 Explanation

Perform image processing, in order to obtain a sharp and dark copy image when copying an original containing

light text and graphic images, or a light copy image when copying an original containing a highly colored text

and copy image.

 Procedures

* The procedure to use varies, depending on whether to adjust the copy image quality in the Black mode, Full

color mode or Auto color mode. Refer to the procedure corresponding to the particular user’s request.

2. Copier-specific Adjustments

2-2

2.1.1 To Adjust the Copy Image Quality in the Black Mode

* You can start with any of the procedures. But it is recommended to perform the procedures in order, as listed

below. You can use one procedure in conjunction with another. But if this changes the image quality more

than required or loses the effectiveness of the adjustment, restore the settings made in the previously used

procedure to the original ones. Then use other procedures.

* Both the service technician and the user can use procedures (1), (2) and (4).

* Only the service technician must use procedures (3), (5) and (6).

(1) Press the [BASIC] button on the Control Panel. Press the [ ] button to increase the copy density.

After increasing the copy density, copy and check the copy image quality.

With the copy density set to the maximum, if further image quality adjustments are still necessary, use the

next procedure.

(2) Press the [IMAGE] button on the Control Panel. Press the [SHARPNESS] button.

Press the [SHARP] button to increase the sharpness intensity.

After increasing the sharpness intensity, copy and check the copy image quality.

With the sharpness intensity set to the maximum, if further image quality adjustments are still necessary, the

service technician must use the following procedures.

(3) Enter adjustment mode [05]. Increase the values for codes [604] to [606], [1757] and [7807] to [7809] to

make the copied text darker (sharpness level increases).

• The code to use varies according to the original mode (Text/Photo, Text or Photo). Adjust the value for

[05] code corresponding to the original mode in which you would like to improve the image quality and set

values larger than "128" for codes 05-604/605.

Original mode [05] code

Recommended

value

Acceptable value range

Default

Text / Photo 05-604

Text 05-605

Photo 05-606

Image smoothing 05-7809

ACS / Black

Text/Photo

05-1757

ACS / Black

Text

05-7807

ACS / Black

Photo

05-7808

Set a value larger than

128.

0 to 255 128

* Setting "0" provides the softest image, while setting "255" provides the sharpest image.

Changing the values for these codes will change the sharpness intensity, when the "Sharpness" indicator in

the "IMAGE" menu is set to the center. Remember that 1 step of the indicator will increase or decrease the

sharpness intensity by 25. If the sharpness intensity of the center value is changed, each step of the indicator

will be changed accordingly. (For instance, if the center value is increased by 25 (sharper), the value of each

step of the indicator will also be increased by 25 (sharper).)

After increasing the sharpness intensity, copy and check the copy image quality.

If further image quality adjustments are still necessary, use the next procedure.

2. Copier-specific Adjustments

2-3

(4) Press the [BASIC] button on the Control Panel. Select "TEXT" from among the original mode options.

* To have "TEXT" selected from among the original mode options by default, refer to procedure (1) in 2.8

To Eliminate Moiré.

After selecting the Text mode, copy and check the copy image quality.

If further image quality adjustments are still necessary, use the next procedure.

(5) Enter adjustment mode [05]. Decrease the values for codes [648], [649], [925], [7102] and [7103] to make

the text darker (improving faint text or thin lines).

Original mode [05] code

Recommended

value

Acceptable

value range

Default

Text / Photo 05-648

Text 05-649 User custom 05-925 ACS / Black

Text/Photo

05-7102

ACS / Black

Text

05-7103

Set a value smaller

than 2.

0 to 4 2

* Set the value in increments of approximately 1, while checking the copy image until the optimum value is

obtained.

After increasing the copy density, copy and check the copy image quality.

If further image quality adjustments are still necessary, use the next procedure.

(6) Enter adjustment mode [05]. Change the values for codes [590] to [592] and [7956] to [7959] to adjust the

gamma balance in each of medium- and high-density areas.

Original mode [05] code Subcode

Recommended

value

Acceptable

value range

Default

Text / Photo 05-590

Text 05-591

Photo 05-592

Image smoothing 05-7956

ACS / Black

Text/Photo

05-7957

ACS / Black

Text

05-7958

ACS / Black

Photo

05-7959

1/2

Set a value larger

than 128.

0 to 255 128

* Set the value in increments of approximately 20, while checking the copy image until the optimum value is

obtained.

(Please be careful because the gradation (or density) of the medium-density area may exceed that of the

high-density area, depending on the set value.)

2. Copier-specific Adjustments

2-4

* The subcode varies according to the area where the density is adjusted. Refer to the table below and set

the subcode for the area to be adjusted. The density of light text or a graphic image will vary, if the

medium- or high-density area is mainly adjusted. Setting "0" for the subcode allows you to adjust the low-

density area. But it will not affect the light text or graphic images. Therefore, never change the value for

the low-density area.

Subcode Area where the density is adjusted

1 Medium-density area 2 High-density area

 Precautions after the completion of the adjustment

The adjustment may possibly cause an increase in the amount of toner used, moiré, blurred text (small, dark text

blurred), diminished photo images or gradational images (less accurate reproducibility of halftones). Therefore,

carefully perform the adjustment, while checking the copy image.

 Remarks

Enter a value within the recommended value range mentioned in the procedures. Otherwise, it may cause a loss in

MFP performance, including degradation in the image quality and a reduction in the life of the consumables.

2. Copier-specific Adjustments

2-5

2.1.2 To Adjust the Copy Image Quality in the Full Color Mode

* The setting value for the Full color mode shall be applied also when the original is judged as the full color

image in the Auto color mode.

* You can start with any of the procedures. But it is recommended to perform the procedures in order, as listed

below. You can use one procedure in conjunction with another. But if this changes the image quality more

than required or loses the effectiveness of the adjustment, restore the settings made in the previously used

procedure to the original ones. Then use other procedures.

* Both the service technician and the user can use procedures (1), (2) and (5).

* Only the service technician must use procedures (3) and (4).

(1) Press the [BASIC] button on the Control Panel. Press the [ ] button to increase the copy density.

After increasing the copy density, copy and check the copy image quality.

With the copy density set to the maximum, if further image quality adjustments are still necessary, use the

next procedure.

(2) Press the [IMAGE] button on the Control Panel. Press the [SHARPNESS] button.

Press the [SHARP] button to increase the sharpness intensity.

After increasing the sharpness intensity, copy and check the copy image quality.

With the sharpness intensity set to the maximum, if further image quality adjustments are still necessary, the

service technician must use the following procedures.

(3) Enter adjustment mode [05]. Increase the values for codes [1737 to 1741] to strengthen the copy density of

text (or increase the sharpness intensity).

• The code to use varies according to the original mode (Text/Photo, Text, Printed image, Photo or Map).

Adjust the value for [05] code corresponding to the original mode in which you would like to improve the

image quality and set values larger than "128" for codes 05-1737 to 1741.

Original mode [05] code Recommended value Acceptable value range Default

Text/Photo 05-1737

Text 05-1738

Printed image 05-1739

Photo 05-1740

Map 05-1741

Set a value larger than 128. 0 to 255 128

* Setting "0" provides the softest image, while setting "255" provides the sharpest image.

Changing the values for these codes will change the sharpness intensity, when the "Sharpness" indicator in

the "IMAGE" menu is set to the center. Remember that 1 step of the indicator will increase or decrease the

sharpness intensity by 25. If the sharpness intensity of the center value is changed, each step of the indicator

will be changed accordingly. (For instance, if the center value is increased by 25 (sharper), the value of each

step of the indicator will also be increased by 25 (sharper).)

2. Copier-specific Adjustments

2-6

* The values adjusted for the sharpness intensity are shared in the Full color mode with the Printed image

mode selected and in the Black mode with the Photo mode selected. Therefore, adjusting the copy image

quality in either of the modes affects that in the other mode. Perform copy image quality adjustment in the

mode that is used for the adjustment, while checking the one in the other mode.

After increasing the sharpness intensity, copy and check the copy image quality.

If further image quality adjustments are still necessary, use the next procedure.

(4) Enter adjustment mode [05]. Change the values for codes [1630 to 1633] to adjust the maximum color

density of the text.

Color to

adjust

[05] code Recommended value

Acceptable value range

Default

(Yellow)

05-1630

(Magenta)

05-1631

(Cyan)

05-1632

(Black)

05-1633

Set a value larger than 5 to increase the density.

Set a value smaller than 5 to decrease the density.

0 to 10 5

* Set the value in increments of 1, while checking the copy image until the optimum value is obtained.

* This adjustment will be effective, only if the "TEXT/PHOTO" or "TEXT" mode is selected from among

the original mode options. If the "TEXT/PHOTO" mode is selected, the adjustment will affect only text

(or an area which is recognized as text).

After adjusting the maximum color density of the text, copy and check the copy image quality.

If further image quality adjustments are still necessary, use the next procedure.

(5) Press the [BASIC] button on the Control Panel. Select "TEXT" from among the original mode options.

* To have "TEXT" selected from among the original mode options by default, refer to procedure (1) in 2.8

To Eliminate Moiré.

 Precautions after the completion of the adjustment

The adjustment may possibly cause an increase in the amount of toner used, moiré, blurred text (small, dark text

blurred), diminished photo images or gradational images (less accurate reproducibility of halftones), and noise

around the text on the copy. Therefore, carefully perform the adjustment, while checking the copy image.

 Remarks

Enter a value within the recommended value range mentioned in the procedures. Otherwise, it may cause a loss in

MFP performance, including degradation in the image quality and a reduction in the life of the consumables.

2. Copier-specific Adjustments

2-7

2.1.3 To Adjust the Copy Image Quality in the Auto Color Mode

* You can start with any of the procedures. But it is recommended to perform the procedures in order, as listed

below. You can use one procedure in conjunction with another. But if this changes the image quality more

than required or loses the effectiveness of the adjustment, restore the settings made in the previously used

procedure to the original ones. Then use other procedures.

* Both the service technician and the user can use procedures (1) and (2).

* Only the service technician must use procedure (3) and (4).

(1) Press the [BASIC] button on the Control Panel. Press the [ ] button to increase the copy density.

After increasing the copy density, copy and check the copy image quality.

With the copy density set to the maximum, if further image quality adjustments are still necessary, use the

next procedure.

(2) Press the [IMAGE] button on the Control Panel. Press the [SHARPNESS] button.

Press the [SHARP] button to increase the sharpness intensity.

After increasing the sharpness intensity, copy and check the copy image quality.

With the sharpness intensity set to the maximum, if further image quality adjustments are still necessary, the

service technician must use the following procedure.

(3) Enter adjustment mode [05]. Increase the values for codes [1737], [1738], [1757] and [7807] to make the

copied text darker (the sharpness level increases).

• In the adjustment mode [05], original modes that allow the adjustment of the sharpness level for the Auto

Color mode is only the “TEXT/PHOTO” mode and the “TEXT” mode. Set a value larger than “128” for

each code.

Original mode [05] code

Recommended

value

Acceptable value range

Default

Text / Photo 05-1737

Text 05-1738

ACS / Black

Text/Photo

05-1757

ACS / Black

Text

05-7807

Set a value larger than

128.

0 to 255 128

* Setting "0" provides the softest image, while setting "255" provides the sharpest image.

Changing the values for these codes will change the sharpness intensity, when the "Sharpness" indicator in

the "IMAGE" menu is set to the center. Remember that 1 step of the indicator will increase or decrease the

sharpness intensity by 25. If the sharpness intensity of the center value is changed, each step of the

indicator will be changed accordingly. (For instance, if the center value is increased by 25 (sharper), the

value of each step of the indicator will also be increased by 25 (sharper).)

* The adjustment value for color mode will be adopted if the original is judged as color with the ACS

function.

After setting the value, copy and check the image quality.

If further image quality adjustment is necessary, go to the next step.

2. Copier-specific Adjustments

2-8

(4) Enter the adjustment mode [05] and adjust the gamma balance in each of medium- and high-density areas.

Original mode [05] code Subcode

Recommende

d value

Acceptable

value range

Default

Text/Photo 05-590

Text 05-591

Photo 05-592

ACS / Black

Text/Photo

05-7957

ACS / Black

Text

05-7958

ACS / Black

Photo

05-7959

1/2

Set a value larger

than 128.

0 to 255 128

Subcode

Area where the density

is adjusted

1 Medium-density area 2 High-density area

* Set the value in increments of approximately 20, while checking the copy image until the optimum value is

obtained. Note that gradations (density level) in the medium- and high-density areas may be reversed with

some setting values.

* Subcodes to be entered differ depending on the target density area. Refer to the table above to enter the

subcode for the area to be adjusted. The density of thin text or illustrations is changed by adjusting mainly

the setting value for the medium- or high-density area. Do not change the setting value for the low-density

area because if the subcode is set at “0”, the density of the low-density area is adjusted but there is little or

no effect on changing the density of thin text or illustrations.

After setting the value, copy and check the image quality.

2. Copier-specific Adjustments

2-9

 Precautions after the completion of the adjustment

The adjustment may possibly cause an increase in the amount of toner used, moiré, blurred text (small, dark text

blurred), diminished photo images or gradational images (less accurate reproducibility of halftones). Therefore,

carefully perform the adjustment, while checking the copy image.

 Remarks

Enter a value within the recommended value range mentioned in the procedures. Otherwise, it may cause a loss in

MFP performance, including degradation in the image quality and a reduction in the life of the consumables.

2. Copier-specific Adjustments

2-10

2.2 To Closely Match the Color Balance of the Original

Before the adjustment After the adjustment

The copy image looks yellowish, compared with the original.

The color balance of the copy image is closely

matched with that of the original.

 Explanation

Depending on the color balance of the original, the copy image sometimes looks different from the original.

Perform image quality control, automatic calibration, color adjustment (color balance adjustment or RGB

adjustment) and the color density adjustment, in order to match the color balance of the copy image with that of

the original.

 Procedures

* You can start with any of the procedures. But it is recommended to perform the procedures in order, as listed

below. You can use one procedure in conjunction with another. But if this changes the image quality more

than required or loses the effectiveness of the adjustment, restore the settings made in the previously used

procedure to the original ones. Then use other procedures.

* Only the service technician must use procedures (1) and (5).

* Both the service technician and the user can use procedures (2) to (4).

*Procedure (3) "Hue adjustment" cannot be selected concurrently with procedure (4) "Color balance/RGB

adjustments." Performing either of the adjustments and then another adjustment clears what has been previously

adjusted. For example, using procedure (3) and then procedure (4) clears the adjusted hue using procedure (3).

Copy Copy

2. Copier-specific Adjustments

2-11

(1) Enter adjustment mode [05]. Select code [396]. Press the [START] button.

• Image quality control will be forcibly performed to correct the color balance and copy density.

After exercising image quality control, use procedure (2).

(2) Perform automatic calibration to correct variations in the copy density.

* [ADMIN] is selected from among the [CALIBRATION DISPLAY LEVEL] options by default. In other

words, an administrator is authorized to operate automatic calibration. But the [USER] option can also be

selected to allow the user to operate it. Refer to the User Functions Guide for further information

regarding how to select the [CALIBRATION DISPLAY LEVEL] option.

• Use steps (a) through (i) to perform automatic calibration.

(a) Press the [USER FUNCTIONS] button on the Control Panel to enter the "User Functions" menu.

(b) Press the [ADMIN] tab.

(d) Press the [GENERAL] button.

(e) Press the [CALIBRATION] button.

(f) Press the [COPY] button.

(g) Press the [CALIBRATION] button to print out the test chart.

(h) Place the printed test chart on the original glass.

(i) Press the [START] button to perform calibration. When the calibration comes to an end, the

message "Scanning and calibrating" will disappear.

* As a result of the above steps, the copy image quality will be corrected in the Full color mode and

the Black and White mode simultaneously.

After performing automatic calibration, copy and check the copy image quality.

If further image quality adjustments are still necessary, use the next procedure.

(3) Perform hue adjustment to adjust the tint of the color in the color area to change.

• Use steps (a) through (d) to perform the adjustment.

(a) Press the [IMAGE] button on the Control Panel.

(b) Press [HUE] button.

* Pressing the [+] or [-] button on the indicator changes the hue as shown below.

(For instance, press the [+] button at R (Red). Then the tint of R (Red) is closely matched with that of Y (Yellow).

Press the [-] button at R (Red). Then the tint of R (Red) will be closely matched with that of M (Magenta).

(d) Enter the [ENTER] button.

After adjusting the hue, copy and check the copy image quality.

If further image quality adjustments are still necessary, use the next procedure.

R: -2 R: +2

2. Copier-specific Adjustments

2-12

(4) Perform color balance adjustment or RGB adjustment to adjust the tint of colors in general.

• Use steps (a) through (d) to perform the adjustment.

(a) Press the [IMAGE] button on the Control Panel.

(b) Press the [COLOR BALANCE] button to adjust the color balance by changing the amount of toner

(C, M, Y and K) or the [RGB ADJUSTMENT] button to adjust the color balance by changing the

intensity of R, G and B.

* After selecting the color balance by changing the amount of toner (C, M, Y and K), press the

[DETAIL] button. The tint of the color can be adjusted according to density area (low-, medium-

or high-density area).

(d) Press the [ENTER] button.

After adjusting the tint of the colors, copy and check the copy image quality.

If further image quality adjustments are still necessary, use the next procedure.

(5) Enter adjustment mode [05]. Change the values for codes [1779 to 1798] to adjust the color density.

Color to

adjust

Original mode [05] code Subcode Recommended value

Acceptable

value range

Default

Text/Photo 05-1779 0/1/2

Text 05-1780 0/1/2

Printed image 05-1781 0/1/2

Photo 05-1782 0/1/2

(Yellow)

Map 05-1783 0/1/2

Text/Photo 05-1784 0/1/2

Text 05-1785 0/1/2

Printed image 05-1786 0/1/2

Photo 05-1787 0/1/2

(Magenta)

Map 05-1788 0/1/2

Text/Photo 05-1789 0/1/2

Text 05-1790 0/1/2

Printed image 05-1791 0/1/2

Photo 05-1792 0/1/2

(Cyan)

Map 05-1793 0/1/2

Text/Photo 05-1794 0/1/2

Text 05-1795 0/1/2

Printed image 05-1796 0/1/2

Photo 05-1797 0/1/2

(Black)

Map 05-1798 0/1/2

Set a value larger than 128 to increase the density.

Set a value smaller than 128 to decrease the density.

0 to 255 128

* Set the value in increments of approximately 10, while checking the copy image until the optimum value is

obtained.

* The value for the code corresponding to the original mode (Text/Photo, Text, or Printed image) will affect

the copy image quality in the Full color mode and the Auto color mode.

* The subcode varies according to the area where the density is adjusted. Refer to the table below and set

the subcode for the area to be adjusted.

Subcode Area where the density is adjusted

0 Low-density area 1 Medium-density area 2 High-density area

2. Copier-specific Adjustments

2-13

 Precautions after the completion of the adjustment

The adjustment may possibly cause offset failure, particularly when the highly colored original is copied in the

Photo mode. Therefore, carefully perform the adjustment, while checking the copy image.

 Remarks

Enter a value within the recommended value range mentioned in the procedures. Otherwise, it may cause a loss in

MFP performance, including degradation in the image quality and a reduction in the life of the consumables.

2. Copier-specific Adjustments

2-14

2.3 To Improve the Reproducibility of Gray

Before the adjustment After the adjustment

Another color (M) is blended in the gray area. No undesired color is blended. A clear copy

image is obtained.

 Explanation

When an original containing gray is copied, another color may be blended in the gray area. Perform image quality

control, automatic calibration, color adjustment (color balance adjustment or RGB adjustment) and color density

adjustment, in order to avoid this problem (or to obtain an achromatic color, for instance).

 Procedures

* You can start with any of the procedures. But it is recommended to perform the procedures in order, as listed

below. You can use one procedure in conjunction with another. But if this changes the image quality more

than required or loses the effectiveness of the adjustment, restore the settings made in the previously used

procedure to the original ones. Then use other procedures.

* Only the service technician must use procedures (1) and (4).

* Both the service technician and the user can use procedures (2) and (3).

(1) Enter adjustment mode [05]. Select code [396]. Press the [START] button.

• Image quality control will be forcibly performed to correct the color balance and copy density.

After exercising image quality control, copy and check the copy image quality.

If further image quality adjustments are still necessary, use the next procedure.

(2) Perform automatic calibration to correct variations in the copy density.

* For further information regarding the adjustment procedures, refer to procedure (2) in 2.2 To Closely

Match the Color Balance of the Original.

* [ADMIN] is selected from among the [CALIBRATION DISPLAY LEVEL] options by default. In other

words, an administrator is authorized to operate automatic calibration. But the [USER] option can also be

selected to allow the user to operate it. Refer to the User Functions Guide for further information

regarding how to select the [CALIBRATION DISPLAY LEVEL] option.

After performing automatic calibration, copy and check the copy image quality.

If further image quality adjustments are still necessary, use the next procedure.

2. Copier-specific Adjustments

2-15

(3) Perform color balance adjustment or RGB adjustment to adjust the tint of colors in general.

* For further information regarding the adjustment procedures, refer to procedure (4) in 2.2 To Closely

Match the Color Balance of the Original.

After adjusting the tint of colors, copy and check the copy image quality.

If further image quality adjustments are still necessary, use the next procedure.

(4) Enter adjustment mode [05]. Change the values for codes [1779 to 1798] to adjust the color density.

Color to

adjust

Original mode [05] code Subcode Recommended value

Acceptable

value range

Default

Text/Photo 05-1779 0/1/2

Text 05-1780 0/1/2

Printed image 05-1781 0/1/2

Photo 05-1782 0/1/2

(Yellow)

Map 05-1783 0/1/2

Text/Photo 05-1784 0/1/2

Text 05-1785 0/1/2

Printed image 05-1786 0/1/2

Photo 05-1787 0/1/2

(Magenta)

Map 05-1788 0/1/2

Text/Photo 05-1789 0/1/2

Text 05-1790 0/1/2

Printed image 05-1791 0/1/2

Photo 05-1792 0/1/2

(Cyan)

Map 05-1793 0/1/2

Text/Photo 05-1794 0/1/2

Text 05-1795 0/1/2

Printed image 05-1796 0/1/2

Photo 05-1797 0/1/2

(Black)

Map 05-1798 0/1/2

Set a value larger than 128 to increase the density.

Set a value smaller than 128 to decrease the density.

0 to 255 128

* Set the value in increments of approximately 10, while checking the copy image until the optimum value is obtained.

* The value for the code corresponding to the original mode (Text/Photo, Text, or Printed image) will affect

the copy image quality in the Full color mode and the Auto color mode.

* The subcode varies according to the area where the density is adjusted. Refer to the table below and set

the subcode for the area to be adjusted.

Subcode Area where the density is adjusted

0 Low-density area 1 Medium-density area 2 High-density area

 Precautions after the completion of the adjustment

The adjustment may possibly cause offset failure, particularly when a highly colored original is copied in the Photo mode.

Also, it may cause degradation in the color reproducibility. (Excessively enhancing the tint of black makes other colors,

such as skin tones, look dull.) Therefore, carefully perform the adjustment, while checking the copy image.

 Remarks

Enter a value within the recommended value range mentioned in the procedures. Otherwise, it may cause a loss in

MFP performance, including degradation in the image quality and a reduction in the life of the consumables.

2. Copier-specific Adjustments

2-16

2.4 To Copy in Vivid Colors

Before the adjustment After the adjustment

When a copy is made without any adjustments, the vividness is insufficient on the copy image.

The copy image is obtained in vivid colors.

 Explanation

When a copy is made without any adjustments, the vividness may be insufficient on the copy image. Perform

saturation adjustment, color adjustment (color balance adjustment or RGB adjustment), and color density

adjustment, in order to obtain a copy image in vivid colors.

 Procedures

* You can start with any of the procedures other than (5). But it is recommended to perform the procedures in

order, as listed below. You can use one procedure in conjunction with another. But if this changes the image

quality more than required or loses the effectiveness of the adjustment, restore the settings made in the

previously used procedure to the original ones. Then use other procedures.

* Both the service technician and the user can use procedures (1) to (3).

* Only the service technician must use procedure (4).

* Only if the vividness of R (Red) is still insufficient even after procedures (1) to (4) have been used, the service

technician must use procedure (5).

2. Copier-specific Adjustments

2-17

(1) Press the [IMAGE] button on the Control Panel. Press the [ONE TOUCH ADJUSTMENT] button.

Press the [VIVID] button.

After selecting the "Vivid" option, copy and check the copy image quality.

When the copy image quality with the "Vivid" option is insufficient, cancel the "Vivid" option and use the

next procedure.

(The one-touch adjustment can be canceled by pressing the [ONE TOUCH ADJUSTMENT] button again.)

(2) Perform saturation adjustment to adjust the overall saturation.

• Use steps (a) through (d) to perform the adjustment.

(a) Press the [IMAGE] button on the Control Panel.

(b) Press the [SATURATION] button.

(d) Press the [ENTER] button.

After adjusting the saturation, copy and check the copy image quality.

If further image quality adjustments are still necessary, use the next procedure.

(3) Perform color balance adjustment or RGB adjustment to adjust the tint of colors in general.

* For further information regarding the adjustment procedures, refer to procedure (4) in 2.2 To Closely

Match the Color Balance of the Original.

After adjusting the tint of colors, copy and check the copy image quality.

If further image quality adjustments are still necessary, the service technician must use the next procedure.

2. Copier-specific Adjustments

2-18

(4) Enter adjustment mode [05]. Change the values for codes [1779 to 1798] to adjust the color density.

Color to

adjust

Original mode [05] code Subcode Recommended value

Acceptable

value range

Default

Text/Photo 05-1779 0/1/2

Text 05-1780 0/1/2

Printed image 05-1781 0/1/2

Photo 05-1782 0/1/2

(Yellow)

Map 05-1783 0/1/2

Text/Photo 05-1784 0/1/2

Text 05-1785 0/1/2

Printed image 05-1786 0/1/2

Photo 05-1787 0/1/2

(Magenta)

Map 05-1788 0/1/2

Text/Photo 05-1789 0/1/2

Text 05-1790 0/1/2

Printed image 05-1791 0/1/2

Photo 05-1792 0/1/2

(Cyan)

Map 05-1793 0/1/2

Text/Photo 05-1794 0/1/2

Text 05-1795 0/1/2

Printed image 05-1796 0/1/2

Photo 05-1797 0/1/2

(Black)

Map 05-1798 0/1/2

Set a value larger than 128 to increase the density.

Set a value smaller than 128 to decrease the density.

0 to 255 128

* Set the value in increments of approximately 10, while checking the copy image until the optimum value is

obtained.

* The value for the code corresponding to the original mode (Text/Photo, Text, or Printed image) will affect

the copy image quality in the Full color mode and the Auto color mode.

* The subcode varies according to the area where the density is adjusted. Refer to the table below and set

the subcode for the area to be adjusted.

Subcode Area where the density is adjusted

0 Low-density area 1 Medium-density area 2 High-density area

After setting the values, copy and check the copy image quality.

Only if the vividness of R (Red) is still insufficient even after all the above procedures have been used, must

the service technician use the next procedure.

2. Copier-specific Adjustments

2-19

(5) Enter adjustment mode [05]. Change the value for code [2905] to adjust the transfer (1st transfer) roller bias

output.

(Adjust the offset voltage of transfer roller bias for C (Cyan) and K (Black) so as to increase the density of R

(Red).)

• The code to use varies according to the paper type and color to adjust. Adjust the value for the subcode

corresponding to the color for which you would like to improve the image quality. Set the value within a

range of "2" to "5" to obtain the highest density of R (Red).

Paper type

Color to

adjust

[05] code Subcode

Recommended

value

Acceptable

value range

Default

C (Cyan) 2

Plain paper

K (Black) 3

C (Cyan) 8

Thick

K (Black)

05-2905

2 to 5 0 to 10 5

* Never change the values for subcodes other than the above. Otherwise, it may cause a loss in MFP

performance, including degradation in the image quality.

<Note> • The adjustment may possibly decrease the density of G (Green), B (Blue) and K (Black)

extremely. Therefore, carefully perform the adjustment, while checking the copy image.

• Unless this adjustment changes the density of R (Red), return the values to the default (set

value: 5).

• This adjustment may affect not only the copy image but also every image quality such as the

printout. Therefore, perform the adjustment, being aware that the image quality of all future

printouts will be changed, when printing out originals other than the one that is used for the

adjustment.

 Precautions after the completion of the adjustment

The adjustment may possibly cause offset failure, particularly when the highly colored original is copied in the

Photo mode. Therefore, carefully perform the adjustment, while checking the copy image.

 Remarks

Enter a value within the recommended value range mentioned in the procedures. Otherwise, it may cause a loss in

MFP performance, including degradation in the image quality and a reduction in the life of the consumables.

2. Copier-specific Adjustments

2-20

2.5 To Make the Pale Area of the Original Look Darker and Sharper

(To improve the highlight reproducibility)

Before the adjustment After the adjustment

The splashing area (highlight) is blurred. A clear copy image of the splashing area

is obtained.

 Explanation

Perform the copy density adjustment and background adjustment, in order to make the pale area (highlight) of

the original look darker and sharper on the copy.

 Procedures

* You can start with any of the procedures. But it is recommended to perform the procedures in order, as listed

below. You can use one procedure in conjunction with another. But if this changes the image quality more

than required or loses the effectiveness of the adjustment, restore the settings made in the previously used

procedure to the original ones. Then use other procedures.

* Both the service technician and the user can use procedures (1) and (3).

* Only the service technician must use procedures (2) and (4).

(1) Press the [IMAGE] button on the Control Panel. Press the [BACKGROUND ADJUSTMENT] button.

Press the [DARK] button to darken the background.

After increasing the background density, copy and check the copy image quality.

With the background density set to the maximum, if further image quality adjustments are still necessary,

the service technician must use the next procedure.

2. Copier-specific Adjustments

2-21

(2) Enter adjustment mode [05]. Change the values for codes [1688] to [1692], [1698] to [1702] and [7759] to

[7761] to adjust the density level of the background.

* The highlighted area will become highly visible, if the background density is increased.

Adjustment Original mode [05] code Recommended value

Acceptable

value range

Default

Text/Photo 05-1688

Text 05-1689

Printed image 05-1690

Photo 05-1691

Automatic offsetting adjustment for background processing

Map 05-1692

Text/Photo 05-1698

Text 05-1699

Printed image 05-1700

Photo 05-1701

Manual offsetting adjustment for background processing

Map 05-1702

Text/Photo 05-7759

Text 05-7760

Twin color copy

Printed image 05-7761

Set a value larger than 128 to increase the density.

0 to 255 128

* The value for automatic offsetting adjustment for background processing will be applied, only if the

automatic copy density mode is selected. On the other hand, the value for manual offsetting adjustment for

background processing will be applied, only if the manual copy density mode is selected.

* Set the value in increments of approximately 10, while checking the copy image until the optimum value is

obtained.

* The value for the code corresponding to the original mode (Text/Photo, Text, or Printed image) will affect

the copy image quality in the Full color mode and the Auto color mode.

<Note> "Making the highlighted area more visible (or increasing the background density)" and

"eliminating the background color (or decreasing the background density)" are mutually

contradictory. If the background color is darkened to make the highlighted area more visible,

the hue of the background may change.

After adjusting the background density, copy and check the copy image quality.

If further image quality adjustments are still necessary, use the next procedure.

(3) Press the [BASIC] button on the Control Panel. Press the [ ] button to increase the copy density.

After increasing the copy density, copy and check the copy image quality.

With the copy density set to the maximum, if further image quality adjustments are still necessary, the

service technician must use the next procedure.

2. Copier-specific Adjustments

2-22

(4) Enter adjustment mode [05]. Change the values for codes [1779 to 1798] to adjust the color density.

Color to

adjust

Original mode [05] code Subcode Recommended value

Acceptable

value range

Default

Text/Photo 05-1779 0/1

Text 05-1780 0/1

Printed image 05-1781 0/1

Photo 05-1782 0/1

(Yellow)

Map 05-1783 0/1

Text/Photo 05-1784 0/1

Text 05-1785 0/1

Printed image 05-1786 0/1

Photo 05-1787 0/1

(Magenta)

Map 05-1788 0/1

Text/Photo 05-1789 0/1

Text 05-1790 0/1

Printed image 05-1791 0/1

Photo 05-1792 0/1

(Cyan)

Map 05-1793 0/1

Text/Photo 05-1794 0/1

Text 05-1795 0/1

Printed image 05-1796 0/1

Photo 05-1797 0/1

(Black)

Map 05-1798 0/1

Set a value larger than 128 to increase the density.

Set a value smaller than 128 to decrease the density.

0 to 255 128

* Set the value in increments of approximately 10, while checking the copy image until the optimum value is

obtained.

* The value for the code corresponding to the original mode (Text/Photo, Text, or Printed image) will affect

the copy image quality in the Full color mode and the Auto color mode.

* The subcode varies according to the area where the density is adjusted. Refer to the table below and set the

subcode for the area to be adjusted. The density of the highlighted area will vary, if the low- or medium-

density area is mainly adjusted. Setting "2" for subcode allows you to adjust the high-density area. But it

will not affect the highlighted area. Therefore, never change the value for the high-density area.

Subcode Area where the density is adjusted

0 Low-density area 1 Medium-density area

 Precautions after the completion of the adjustment

The adjustment may possibly provide an excessively dark background. Therefore, carefully perform the

adjustment, while checking the copy image.

 Remarks

Enter a value within the recommended value range mentioned in the procedures. Otherwise, it may cause a loss

in MFP performance, including degradation in the image quality and a reduction in the life of the consumables.

2. Copier-specific Adjustments

2-23

2.6 To Eliminate the Background Color

Before the adjustment After the adjustment

The background color of the original is also copied. Therefore, no clear contrast is made between the background and text.

The background color is eliminated, allowing

clear contrast between the background and text.

 Explanation

When a full-color original, such as colored paper, is copied, its background color is also copied. Therefore, no

clear contrast is made between the background and the text on the copy. Perform background adjustment, in

order to copy an original with a highly colored background, while eliminating the background color or making it

white.

 Procedures

* The procedure to use varies, depending on whether to adjust the copy image quality in the Black mode or the

Full color mode. Refer to the procedure corresponding to the user’s particular request.

2. Copier-specific Adjustments

2-24

2.6.1 To Adjust the Copy Image Quality in the Black Mode

* You can start with any of the procedures. But it is recommended to perform the procedures in order, as listed

below. You can use one procedure in conjunction with another. But if this changes the image quality more

than required or loses the effectiveness of the adjustment, restore the settings made in the previously used

procedure to the original ones. Then use other procedures.

* Both the service technician and the user can use procedure (1).

* Only the service technician must use procedures (2) to (4).

(1) Press the [IMAGE] button on the Control Panel. Press the [BACKGROUND ADJUSTMENT] button.

Press the [LIGHT] button to decrease the background density.

After decreasing the background density, copy and check the image quality.

With the background density set to the minimum, if further image quality adjustments are still necessary, the

service technician must use the next procedure.

(2) Enter adjustment mode [05]. Change the values for codes [7033], [7034], [7041] to [7044], [7048] and

[7049] to adjust the density level of the background.

Adjustment Original mode [05] code

Recommended

value

Accep

table value range

Default

Text/Photo 05-7041

Text 05-7042

Photo 05-7048

Manual density

adjustment

Image smoothing 05-7049

Text/Photo 05-7033

Text 05-7034

Photo 05-7043

Manual adjustment

Image smoothing 05-7044

Set a value smaller

than 128.

0 to 255

128

* Set the value in increments of approximately 25, while checking the copy image until the optimum value is

obtained.

After adjusting the background density, copy and check the copy image quality.

If further image quality adjustments are still necessary, use the next procedure.

(3) Enter adjustment mode [05]. Change the values for codes [590] to [592] to adjust the gamma balance in

each of low- and medium-density areas.

Original

mode

[05] code Subcode Recommended value

Acceptable

value range

Default

Text/Photo 05-590 0/1

Text 05-591 0/1

Phont 05-592 0/1

Set a value smaller than 128. 0 to 255 128

* Set the value in increments of approximately 20, while checking the copy image until the optimum value is obtained.

2. Copier-specific Adjustments

2-25

* The subcode varies according to the area where the density is adjusted. Refer to the table below and set

the subcode for the area to be adjusted. The background density will vary, if the low- or medium-density

area is mainly adjusted. Setting "2" for the subcode allows you to adjust the high-density area. But it will

not affect the background density. Therefore, never change the value for the high-density area.

Subcode Area where the density is adjusted

0 Low-density area 1 Medium-density area

After adjusting the gamma curve balance, copy and check the copy image quality.

If further image quality adjustments are still necessary, use the next procedure.

(4) Enter the adjustment mode [05]. Change the values for codes [7286] and [7287] to set the range correction

operation in the manual density mode fixed.

• The code to be set differs depending on the original mode (Text/Photo or Text). Select the [05] code for the

target original mode and change the value to “0”.

Original mode [05] code

Recommended

value

Acceptable

value range

Default

Text/Photo 05-7286

Text 05-7287

0 0, 1 1

* Explanation for setting values

Setting

value

Range correction

operation

0 Fixed 1 Varied

 Precautions after the completion of the adjustment

The adjustment may possibly cause text handwritten with a pencil or light text to become illegible on the copy.

Therefore, carefully perform the adjustment, while checking the copy image.

 Remarks

Enter a value within the recommended value range mentioned in the procedures. Otherwise, it may cause a loss in

MFP performance, including degradation in the image quality.

2. Copier-specific Adjustments

2-26

2.6.2 To Adjust the Copy Image Quality in the Full Color Mode

* You can start with any of the procedures. But it is recommended to perform the procedures in order, as listed

below. You can use one procedure in conjunction with another. But if this changes the image quality more

than required or loses the effectiveness of the adjustment, restore the settings made in the previously used

procedure to the original ones. Then use other procedures.

* Both the service technician and the user can use procedures (1) and (4).

* Only the service technician must use procedures (2) and (3).

(1) Press the [AUTO] button on the Control Panel to select the automatic density adjustment.

(2) Press the [IMAGE] button on the Control Panel. Press the [BACKGROUND ADJUSTMENT] button.

Press the [LIGHT] button to decrease the background density.

After decreasing the background density, copy and check the image quality.

With the background density set to the minimum, if further image quality adjustments are still necessary, the

service technician must use the next procedure.

(3) Enter adjustment mode [05]. Change the values for codes [1688 to 1692] and [1698 to 1702] to adjust the

background density.

Adjustment Original mode [05] code Recommended value

Acceptable

value range

Default

Text/Photo 05-1688

Text 05-1689

Printed image 05-1690

Photo 05-1691

Automatic offsetting adjustment for background processing

Map 05-1692

Text/Photo 05-1698

Text 05-1699

Printed image 05-1700

Photo 05-1701

Manual offsetting adjustment for background processing

Map 05-1702

Set a value smaller than 128. 0 to 255 128

* The value for automatic offsetting adjustment for background processing will be applied, only if the

automatic copy density mode is selected. On the other hand, the value for manual offsetting adjustment for

background processing will be applied, only if the manual copy density mode is selected.

* Set the value in increments of approximately 10, while checking the copy image until the optimum value is

obtained.

* The value for the code corresponding to the original mode (Text/Photo, Text, or Printed image) will affect

the copy image quality in the Full color mode and the Auto color mode.

* The value adjusted for the background density is shared in the Full color mode with the Printed image

mode selected and in the Black mode with the Photo mode selected. Therefore, adjusting the copy image

quality in either of the modes affects that in the other mode. Perform copy image quality adjustment in the

mode that is used for the adjustment, while checking that in the other mode.

* In the manual density adjustment, images are processed with the highlighting reproducibility given priority.

Therefore it is recommended to select the automatic density adjustment in order to make the background

lighter.

2. Copier-specific Adjustments

2-27

<Note> "Making the highlighted area more visible (or increasing the background density)" and

"eliminating the background color (or decreasing the background density)" are mutually

contradictory. If the density of the background color is decreased, the highlighted area may

become less visible.

After adjusting the background density, copy and check the copy image quality.

If further image quality adjustments are still necessary, or background elimination is necessary according to

color, use the next procedure.

(4) Enter adjustment mode [05]. Change the values for codes [1779 to 1798] to adjust the color density.

Color to

adjust

Original mode [05] code Subcode Recommended value

Acceptable

value range

Default

Text/Photo 05-1779 0/1

Text 05-1780 0/1

Printed image 05-1781 0/1

Photo 05-1782 0/1

(Yellow)

Map 05-1783 0/1

Text/Photo 05-1784 0/1

Text 05-1785 0/1

Printed image 05-1786 0/1

Photo 05-1787 0/1

(Magenta)

Map 05-1788 0/1

Text/Photo 05-1789 0/1

Text 05-1790 0/1

Printed image 05-1791 0/1

Photo 05-1792 0/1

(Cyan)

Map 05-1793 0/1

Text/Photo 05-1794 0/1

Text 05-1795 0/1

Printed image 05-1796 0/1

Photo 05-1797 0/1

(Black)

Map 05-1798 0/1

Set a value larger than 128 to increase the density.

Set a value smaller than 128 to decrease the density.

0 to 255 128

* Set the value in increments of approximately 10, while checking the copy image until the optimum value is

obtained.

* The value for the code corresponding to the original mode (Text/Photo, Text, or Printed image) will affect

the copy image quality in the Full color mode and the Auto color mode.

* The subcode varies according to the area where the density is adjusted. Refer to the table below and set

the subcode for the area to be adjusted. The background (highlight) density will vary, if the low- or

medium-density area is mainly adjusted. Setting "2" for the subcode allows you to adjust the high-density

area. But it will not affect the background density. Therefore, never change the value for the high-density

area.

Subcode Area where the density is adjusted

0 Low-density area 1 Medium-density area

After adjusting the background density, copy and check the copy image quality.

If further image quality adjustments are still necessary, use the next procedure.

2. Copier-specific Adjustments

2-28

(5) Press the [BASIC] button on the Control Panel. Select "TEXT" from among the original mode options.

* To have "TEXT" selected from among the original mode options by default, refer to procedure (1) in 2.8

To Eliminate Moiré.

 Precautions after the completion of the adjustment

The adjustment may possibly cause the highlighted area to become less visible on the copy. Therefore, carefully

perform the adjustment, while checking the copy image.

 Remarks

Enter a value within the recommended value range mentioned in the procedures. Otherwise, it may cause a loss

in MFP performance, including degradation in the image quality.

2. Copier-specific Adjustments

2-29

2.7 To Avoid Copying the Image Seen through the Back of a Page Printed on Thin Paper

Original printed on thin paper (front) Original printed on thin paper (back)

Before the adjustment After the adjustment

When a double-sided original printed on thin paper is copied, the images seen through the back of the page are also copied.

The images seen through the back of the page

are not copied any more in duplex copying.

 Explanation

When a double-sided original printed on thin paper, such as a brochure and leaflet, is copied, the images seen

through the back of the page are also copied. Perform background adjustment, in order to avoid this problem.

2. Copier-specific Adjustments

2-30

 Procedures

* The procedure to use varies, depending on whether to adjust the copy image quality in the Black mode or the

Full color mode. Refer to the procedure corresponding to the user’s particular request.

* Refer to the procedure to adjust the copy image quality in the Full color mode with the Printed image mode selected,

in order to adjust the copy image quality in the Black mode with the Photo mode selected. The value adjusted is

shared in the Black mode with the Photo mode selected and in the Full color mode with the Printed image mode

selected. Therefore, adjusting the copy image quality in either of the modes affects that in the other mode.

2.7.1 To Adjust the Copy Image Quality in the Black Mode

* You can start with any of the procedures. But it is recommended to perform the procedures in order, as listed

below. You can use one procedure in conjunction with another. But if this changes the image quality more

than required or loses the effectiveness of the adjustment, restore the settings made in the previously used

procedure to the original ones. Then use other procedures.

* Both the service technician and the user can use procedure (1) and (2).

* Only the service technician must use procedures (3) to (5).

(1) Press the [IMAGE] button on the Control Panel. Press the [BACKGROUND ADJUSTMENT] button.

Press the [LIGHT] button to decrease the background density.

After decreasing the background density, copy and check the image quality.

With the background density set to the minimum, if further image quality adjustments are still necessary, the

service technician must use the next procedure.

(2) Press the [BASIC] button on the Control Panel. Press the [ ] button to decrease the copy density.

* Move the copy density indicator to the " " side for 1 or 2 steps. The images seen through the back of the page

will no longer be copied. But remember that text will also be lightly copied, depending on the type of original.

After decreasing the copy density, copy and check the copy image quality.

With the copy density set to the minimum, if the images seen through the back of the page are still copied, or if

you would like to prevent this problem without changing the copy density of text, use the next procedure.

2. Copier-specific Adjustments

2-31

(3) Enter adjustment mode [05]. Change the values for codes [7033], [7034], [7041] to [7044], [7048] and

[7049] to adjust the density level of the background.

Adjustment Original mode [05] code

Recommended

value

Accep

table value range

Default

Text/Photo 05-7041

Text 05-7042

Photo 05-7048

Manual density

adjustment

Image smoothing 05-7049

Text/Photo 05-7033

Text 05-7034

Photo 05-7043

Manual adjustment

Image smoothing 05-7044

Set a value smaller

than 128.

0 to 255

128

* Set the value in increments of approximately 25, while checking the copy image until the optimum value is

obtained.

After adjusting the background density, copy and check the copy image quality.

If further image quality adjustments are still necessary, use the next procedure.

(4) Enter the adjustment mode [05]. Change the values for codes [7286] and [7287] to make the range

correction operation in the manual density mode fixed.

• The code to be set differs depending on the original mode (Text/Photo or Text). Select the [05] code for the

target original mode and change the value to “0”.

Original mode [05] code

Recommended

value

Acceptable

value range

Default

Text/Photo 05-7286

Text 05-7287

0 0, 1 1

* Explanation for setting values

Setting

value

Range correction

operation

0 Fixed 1 Varied

After adjusting the background peak, copy and check the copy image quality.

If further image quality adjustments are still necessary, use the next procedure.

2. Copier-specific Adjustments

2-32

(5) Enter adjustment mode [05]. Change the values for codes [590] to [592] to adjust the gamma balance in each

of the low- and medium-density area.

Original mode [05] code Subcode

Recommended

value

able

value

range

Default

Text/Photo 05-590 0/1

Text 05-591 0/1

Photo 05-592 0/1

Set a value smaller than

128.

0 to 255 128

* Set the value in increments of approximately 20, while checking the copy image until the optimum value

is obtained. (Note that gradations (density level) in the medium- and high-density areas may be reversed

with some setting values.)

* Since the subcode varies according to the area where the density is adjusted, refer to the table below and

set the appropriate subcode. Remember that mainly adjusting the low- or medium-density area will change

the copy density of the images seen through the back of the page. Setting "2" for the subcode will allow

you to adjust the high-density area. But this will not solve the problem. Therefore, never change the value

for the high-density area.

Subcode Area where the density is adjusted

0 Low-density area 1 Medium-density area

 Precautions after the completion of the adjustment

The adjustment may possibly cause text handwritten with a pencil or light text to become illegible on the copy.

Therefore, carefully perform the adjustment, while checking the copy image.

 Remarks

Enter a value within the recommended value range mentioned in the procedures. Otherwise, it may cause a loss

in MFP performance, including degradation in the image quality and a reduction in the life of the consumables.

2. Copier-specific Adjustments

2-33

2.7.2 To Adjust the Copy Image Quality in the Full Color Mode

* You can start with any of the procedures. But it is recommended to perform the procedures in order, as listed

below. You can use one procedure in conjunction with another. But if this changes the image quality more

than required or loses the effectiveness of the adjustment, restore the settings made in the previously used

procedure to the original ones. Then use other procedures.

* Both the service technician and the user can use procedures (1) and (3).

* Only the service technician must use procedure (2).

(1) Press the [IMAGE] button on the Control Panel. Press the [BACKGROUND ADJUSTMENT] button.

Press the [LIGHT] button to decrease the background density.

After decreasing the background density, copy and check the copy image quality.

With the background density set to the minimum, if the images seen through the back of the page are still

copied, the service technician must use the next procedure.

(2) Enter adjustment mode [05]. Change the values for codes [1688 to 1692] and [1698 to 1702] to adjust the

background density.

Adjustment Original mode [05] code Recommended value

Acceptable

value range

Default

Text/Photo 05-1688

Text 05-1689

Printed image 05-1690

Photo 05-1691

Automatic offsetting adjustment for background processing

Map 05-1692

Text/Photo 05-1698

Text 05-1699

Printed image 05-1700

Photo 05-1701

Manual offsetting adjustment for background processing

Map 05-1702

Set a value smaller than 128. 0 to 255 128

* The value for automatic offsetting adjustment for background processing will be applied, only if the

automatic copy density mode is selected. On the other hand, the value for manual offsetting adjustment for

background processing will be applied, only if the manual copy density mode is selected.

* Set the value in increments of approximately 10, while checking the copy image until the optimum value is

obtained.

* The value for the code corresponding to the original mode (Text/Photo, Text, or Printed image) will affect

the copy image quality in the Full color mode and the Auto color mode.

* The value adjusted for the background density is shared in the Full color mode with the Printed image

mode selected and in the Black mode with the Photo mode selected. Therefore, adjusting the copy image

quality in either of the modes affects that in the other mode. Perform copy image quality adjustment in the

mode that is used for the adjustment, while checking that in the other mode.

2. Copier-specific Adjustments

2-34

<Note> "Making the highlighted area more visible (or increasing the background density)" and

"eliminating the background color (or decreasing the background density)" are mutually

contradictory. If the density of the background color is decreased, the highlighted area may

become less visible.

After adjusting the background density, copy and check the copy image quality.

If further image quality adjustments are still necessary, use the next procedure.

(3) Press the [BASIC] button on the Control Panel. Select "TEXT" from among the original mode options.

* To have "TEXT" selected from among the original mode options by default, refer to procedure (1) in 2.8

To Eliminate Moiré.

 Precautions after the completion of the adjustment

The adjustment may possibly cause the highlighted area to become less visible on the copy. Therefore, carefully

perform the adjustment, while checking the copy image.

 Remarks

Enter a value within the recommended value range mentioned in the procedures. Otherwise, it may cause a loss

in MFP performance, including degradation in the image quality.

2. Copier-specific Adjustments

2-35

2.8 To Eliminate Moiré

Before the adjustment

After the adjustment

Moiré occurs on the photo image. Moiré is eliminated and a clear copy image is

obtained.

 Explanation

When an original containing photo images or gradational images (halftones) is copied, moiré sometimes occurs

on the copy. Perform adjustment regarding image processing (sharpness intensity), in order to obtain a clear

copy image, while eliminating moiré.

 Procedures

* You can start with any of the procedures. But it is recommended to perform the procedures in order, as listed

below. You can use one procedure in conjunction with another. But if this changes the image quality more

than required or loses the effectiveness of the adjustment, restore the settings made in the previously used

procedure to the original ones. Then use other procedures.

* Both the service technician and the user can use procedures (1) and (2).

* Only the service technician must use procedure (3).

2. Copier-specific Adjustments

2-36

(1) Press the [BASIC] button on the Control Panel and select the original mode option, as follows:

• To copy in the Full color or the Auto color mode: Select the Printed image mode option.

• To copy in the Black mode: Select the Photo mode option.

* To have the above original mode options selected by default, use the following procedures:

To change the default original mode on the Control Panel

Use steps (a) to (d) to change default original mode.

(a) Press the [USER FUNCTIONS] button on the Control Panel to enter the "User Functions" menu.

(b) Press the [USER] tab.

(d) In the "ORIGINAL MODE FOR COLOR" or "BLACK" option, press the button corresponding to

the desired original mode option.

To change the default original mode in setting mode [08]

Enter setting mode [08]. Change the value for code [550] or [585] to change the original mode option,

which is selected by default at power-on.

• In the Black mode

Value for 08-550 Default original mode at power-on

0 Text/Photo (default) 1 Text 2 Photo 3 Image smoothing 4 Custom

• In the Full color mode

Value for 08-585 Default original mode at power-on

0 Text/Photo (default) 1 Text 2 Printed image 3 Photo 4 Map 5 Custom

* Press the [BASIC] button on the Control Panel. Select "Custom" from among the original mode options in

the Black or the Full color mode.

If the [CUSTOM] button is not displayed in the original mode option, change the values for the following

codes to enable the "Custom" mode option.

In the Black mode: Enter setting mode [08]. Set "1" for code [508].

In the Full color mode: Enter setting mode [08]. Set "1" for code [506].

After changing the default original mode option, copy and check the copy image quality.

If further image quality adjustments are still necessary, use the next procedure.

2. Copier-specific Adjustments

2-37

(2) Press the [IMAGE] button on the Control Panel. Press the [SHARPNESS] button.

Press the [SOFT] button to soften the copy image.

After softening the copy image, copy and check the copy image quality.

If further image quality adjustments is necessary, go to the next step.

(3) Enter adjustment mode [05].Change the values for codes [604] to [606], [922], [1737] to [1741], [1757],

[7795] and [7807] to [7809] to adjust the default value for the sharpness intensity.

* Decreasing the sharpness intensity will minimize moiré.

Color mode Original mode [05] code

Recommended

value

Accepta

ble value

range

Default

Text / Photo 05-604

Text 05-605

Photo 05-606

User custom 05-922

Black

Image smoothing 05-7809

Set a value smaller

than 128.

（28 to 127）

0 to 255 128

Text / Photo 05-1737

Text 05-1738

Printed image 05-1739

Photo 05-1740

Map 05-1741

Full color

User custom 05-7795

Set a value smaller

than 128.

（28 to 127）

0 to 255 128

Text / Photo 05-1757

Text 05-7807

ACS / Black

Photo 05-7808

Set a value smaller

than 128.

（28 to 127）

0 to 255 128

*The smaller the value is, the weaker the sharpness intensity becomes. The larger the setting value is, the

stronger the sharpness intensity becomes.

Changing the values for these codes will change the sharpness intensity, when the "Sharpness" indicator in

the "IMAGE" menu is set to the center. Remember that 1 step of the indicator will increase or decrease the

sharpness intensity by 25. If the sharpness intensity of the center value is changed, each step of the

indicator will be changed accordingly. (For instance, if the center value is decreased by 25 (softer), the

value of each step of the indicator will also be decreased by 25 (softer).)

However, the range of adjustment values that is valid for sharpness level change is from -100 to +100 of

the total of the setting value of the adjustment code and that of the indicator. For instance, if the setting

value of the adjustment code is “103” (-25 from the default value), the limit of the steps in the soft side of

the indicator is “-3”. If the step is set at “-4”, the image quality will not be changed.

2. Copier-specific Adjustments

2-38

<Note> "Minimizing moiré" and "Sharpening the copy image" are mutually contradictory. When the

adjustment is performed to minimize moiré, the resolution of the copy image may decrease.

 Precautions after the completion of the adjustment

Nothing in particular.

 Remarks

• Enter a value within the recommended value range mentioned in the procedures. Otherwise, it may cause a

loss in MFP performance, including degradation in the image quality.

Since "-25" is assigned to the center, the image quality

remains the same even if the indicator is changed from

"-3" to "-4".

Setting value "103":

Default:

Soft

Sharp

+50

+75

+25

-25

-2

-75

-50

-4

-100

+75

+100

+25

+50

-1

-50

-25

-3

-100

-50

Assigned adjustment value of sharpness

2. Copier-specific Adjustments

2-39

2.9 To Copy Sharply (To enhance sharpness)

Before the adjustment

After the adjustment

The image looks light and blurred on the copy. The edges are enhanced and the copy image

becomes sharper.

 Explanation

Perform adjustment regarding image processing (sharpness intensity), in order to obtain a sharper copy image,

when a light or blurred original is copied.

 Procedures

* You can start with any of the procedures. But it is recommended to perform the procedures in order, as listed

below. You can use one procedure in conjunction with another. But if this changes the image quality more

than required or loses the effectiveness of the adjustment, restore the settings made in the previously used

procedure to the original ones. Then use other procedures.

* Both the service technician and the user can use procedures (1) and (2).

* Only the service technician must use procedure (3).

(1) Press the [IMAGE] button on the Control Panel. Press the [ONE TOUCH ADJUSTMENT] button.

Press the [CLEAR] button.

After selecting the "Clear" option, copy and check the copy image quality.

When the copy image quality with the "Clear" option selected is insufficient, cancel the "Clear" option and

use the next procedure.

(The one-touch adjustment can be canceled by pressing the [ONE TOUCH ADJUSTMENT] button again.)

(2) Press the [IMAGE] button on the Control Panel. Press the [SHARPNESS] button.

Press the [SHARP] button to increase the sharpness intensity.

After increasing the sharpness intensity, copy and check the copy image quality.

If further image quality adjustment is necessary, go to the next step.

2. Copier-specific Adjustments

2-40

(3) Enter adjustment mode [05]. Change the values for codes [604] to [606], [922], [1737] to [1741], [1757],

[7795] and [7807] to [7809] to adjust the default value for the sharpness intensity.

* Increasing the sharpness intensity will enhance the edges of the image.

Color mode Original mode [05] code

Recommended

value

Accepta

ble value

range

Default

Text / Photo 05-604

Text 05-605

Photo 05-606

User custom 05-922

Black

Image smoothing 05-7809

Set a value larger

than 128.

(129 to 228)

0 to 255 128

Text / Photo 05-1737

Text 05-1738

Printed image 05-1739

Photo 05-1740

Map 05-1741

Full color

User custom 05-7795

Set a value larger

than 128.

(129 to 228)

0 to 255 128

Text / Photo 05-1757

Text 05-7807

ACS / Black

Photo 05-7808

Set a value larger

than 128.

(129 to 228)

0 to 255 128

* The smaller the setting value is, the weaker the sharpness intensity becomes. The larger the setting value is,

the stronger the sharpness intensity becomes.