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25 MODE
*25 Printer gamma offset adjustment
Change the area in which the printer gamma
offset of the 36 mode can be adjusted.
0:
High light area only
1:
Possible in whole area
Mode
High light area only
Possible in whole area
*27 Image background restraint (toner density)
Y, M, C, K
Restrain image background by reducing the
toner density of the developer (toner and car-
rier ratio) by about 0.2%.
This setting changes the toner density of the
developer so that image density does not
change at once.
After changing the DIPSW, set the test pattern
density of the color changed to 128 (with the
density of other colors set to 0), and output 10
sheets of the test pattern No. 1 to check
image background.
And also, after changing the DIPSW, be sure
to conduct the automatic gamma adjustment
(0) of the process adjustment.
There are two DIPSW that restrain image
background: toner density (DIPSW 5-0 to 3)
and a potential difference (DIPSW 7-0 to 3).
Image background can be restrained more
effectively with the DIPSW 7-0 to 3. When
image background occurs, be sure to use the
DIPSW 7-0 to 3 for the first priority. If it is not
sufficiently effective, use the DIPSW 5-0 to 3
at the same time.
Note:
• Since the DIPSW 7-0 to 3 changes the poten-
tial, the carrier may stick to the drum and
damage the drum and the cleaning blade.
Therefore, use this DIPSW only when neces-
sary.
Mode
5-3
K
Standard
0
Restrained
1
2
KONICA MINOLTA 8050/CF5001/C500/8150 Field Service Ver.3.0 Dec. 2004
28-4
0
1
5-2
5-1
5-0
C
M
Y
0
0
0
1
1
1
1-20
*28 Black characters for printer output (IP)
Change the black laser PWM for printing from
PC.
However, if the black laser is set thinner, the
gradation changed. Check the gradation after
changing the setting.
Mode
Standard
Make black characters thin. (Mild)
Make black characters thin.
(Medium)
Make black characters thin.
(Intense)
*29 Periodical black toner band creation on the
transfer belt
When set to "1," the black toner band periodi-
cally created on the transfer belt, more toner
is supplied to the both edges of the belt clean-
ing blade to prevent the occurrence of white
stripes on the image and the flipping of the
both edges of the belt cleaning blade.
Mode
Normal
Increased at the edges
*30 Switchover of the fixing control table (Old type only)
When set to "1", the fixing temperature in the
slower line speed mode is controlled low to
improve uneven wax. However, when tray
switches to a tray in which paper of different
fixing temperature control is loaded (tempera-
ture is lowered), it takes long waiting time.
Max. approx. 150 seconds. (It takes long only
when the memory switch "No.52 Time lag to
switch tray" is set to "Standard" in the key
operator mode.)
Mode
Measures against uneven wax not
provided
Measures against uneven wax pro-
vided
10-7
10-6
0
0
0
1
1
0
1
1
20-4
0
1
20-5
0
1
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