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e-STUDIO5520C/6520C/6530C © 2008 TOSHIBA TEC CORPORATION All rights reserved
2-26
2. Copier-specific Adjustments
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
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.