Toshiba 5520c, 6520c , 2.7.2 To Adjust the Copy Image Quality in the Full Color Mode

2-35

2. Copier-specific Adjustments

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.