AR-C270 (serv.man11). (Section 7) Settings Adjustments M17-M20 - Sharp Copying Equipment Service Manual (repair manual). Page 19

2) Select the color to be adjusted with the color select key, and select

the adjustment point with the scroll key.

3) Enter the adjustment value with the 10-key, and press the OK key.

The adjustment value can be selected in the range of 245 – 755
(AR-C160/C270: 1 – 999). When the automatic color balance and
the density are adjusted with SIM 46-24, all the set values of this
simulation are set to 500.
To increase the density, increase the adjustment value. To de-
crease the density, decrease the adjustment value.

This adjustment is the CCD gamma adjustment (CCD calibration) for
the copy document copy mode, and is different from the CCD gamma
adjustment (CCD calibration) in the normal document copy mode
(ADJ M17/ADJ 1). In the AR-C250/C160/C270, there are above two
kinds of the CCD gamma adjustment (CCD calibration), and both ad-
justments are required.

This adjustment is required in the following cases:

•

After completion of the CCD gamma adjustment (CCD calibration)
(Normal original copy mode) (ADJ M17/ADJ 1)

∗

Check that the table glass, No. 1/2/3 mirrors, and the lens surface
are free from dirt and dust.
(If dirt or dust is found, clean with alcohol.)

∗

Check that the patches of BK1 and BK2 of the SIT chart
(UKOG-0280 FCZZ are free from dirt or dust.
If dirt or dust is found, clean with alcohol.
If any damage is found, replace with a new one.

∗

Since this adjustment is based on the normal document copy
mode CCD gamma adjustment (CCD calibration) (ADJ M17/ADJ
1), the said adjustment must have been completed before
execution of this adjustment.
The copy color balance must also have been adjusted properly.

1) Place the SIT chart (UKOG-0280FCZZ) on the left edge of the

document table, and fit the center of the SIT chart with the center
of the glass holder.

NOTE: Check that the SIT chart (UKOG-0280FCZZ) is in close con-

tact with the document table.

2) Close the document cover without shifting the SIT chart (UKOG-

0280FCZZ).

3) Make a copy in the Text/Printed Photo mode. (Be sure to use the

specified copy paper.)

4) Set the copy made in procedure 3) on the document table so that

the center of the copy paper comes to the center of the left edge
of the document table.

5) Enter the SIM 63-09 mode and press the [EXECUTE] key.

The automatic adjustment is performed. During the adjustment, the
[EXECUTE] key is highlighted. When the adjustment is completed,
the [EXECUTE] key returns to the normal display.

6) Cancel the simulation mode.

NOTE: The SIT chart (UKOG-0280FCZZ) is affected by lights (espe-

cially ultra-violet rays) and temperature and humidity. Store it
in a clear file (nylon file) in a dark place.

The gamma of black toner component images is changed to adjust
the reproduction of the profile of the black character and line option-
ally. Especially the thickness of fine black character and line is
changed.

Since the black toner component image quantity differs depending on
the copy mode, be careful of the copy mode selection to check the
adjustment result. Check in the Text/Printed Photo mode.

This adjustment is valid only in the following copy modes:

•

Text copy mode

•

Text Printed Photo copy mode

•

Text Photo copy mode

The black toner component ratio is greatest in the Text copy mode,
and smallest in the Text Photo copy mode.

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

•

When U2 trouble occurs.

•

When the ICU MAIN PWB is replaced.

•

When the EEPROM of the ICU MAIN PWB is replaced.

1) Enter the SIM 46-27 mode.

(AR-C160/C270)

(AR-C250)

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