AR-C270 (serv.man11). (Section 7) Settings Adjustments M17-M20 - Sharp Copying Equipment Service Manual (repair manual). Page 20

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

The greater the adjustment value is, the greater the density is, and
vice versa.
Normally set to the default (50).

3) Press the [OK] key.

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

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

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

This adjustment is used to adjust color balance and the density ac-
cording to the user’s demand.

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

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

•

When a consumable part (developer, photoconductor drum, trans-
fer belt) is replaced.

•

When the CCD unit is replaced.

•

When the scanner (reading) section is cleaned.

•

When U2 trouble occurs.

•

When the ICU MAIN PWB is replaced.

•

When the EEPROM of the ICU MAIN PWB is replaced.

•

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

1) Enter the SIM 46-25 mode.

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

3) Select the color with the color key.

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

(Default)

Default

C

M

Y

RED

0

255

255

GREEN

255

0

255

BLUE

255

255

0

PURPLE

148

238

105

ORANGE

38

140

255

BROWN

131

255

229

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

copy mode to check.

This setup is used to set the priority order between brightness and
gradation in the color copy mode. The setup affects the gamma char-
acteristic in the high-density area.

1) Enter the SIM 26-55 mode.

2) Press ENABLE or DISABLE key.

ENABLE:

The contrast in the high-density area is increasing, and
the gradation is slightly decreased. (Priority is given to
brightness.)

DISABLE: Normal picture quality (Priority is given to gradation.)

This setting is used to give priority to fusing capability over picture
quality in the color copy mode with heavy paper. The quantity of black
toner which forms images on the paper is reduced by image process
to have better fusing capability.

This setting is used only when poor fusing capability is resulted in the
color copy mode with heavy paper.

When "ENABLE" (Priority of fusing capability) is selected, the color
phase is shifted.

1) Enter the SIM 26-55 mode.

2) Select between ENABLE and DISABLE.

ENABLE:

Priority of fusing capability (The quantity of black toner
which forms images on paper is reduced to have better
fusing capability, but the black concentration is slightly
reduced and the color phase is shifted.) (K toner is
reduced and reproduction of black is supplemented by
Y/M/C toner.)

DISABLE: Normal mode (Normal image process)

The user can perform the copy color balance and auto density adjust-
ment in the user program mode.
SIIM 26-53 is used to Enable or Disable this operation.

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

copy color balance and the auto density adjustment and is
capable of performing the operation.
Full explanations on the operating procedure, notes, and op-
erations must be given to the user.

•

When a U2 trouble occurs.

•

When the PCU main PWB is replaced.

•

When the EEPROM on the PCU main PWB is replaced.

7 –  43