Sharp AR-BC260 Service Manual page 118

Copy color balance and density check
Check the color balance and the density by making copies of
Sharp gray chart and the serviceman chart.
a. Note for the copy color balance check
To check the copy color balance and density, use the Sharp gray
chart and the serviceman chart. In the (Manual) Text/Printed photo
mode, set the copy density level to 3, and make a color copy and a
B/W copy.
At that time, all the color balance adjustments of the user adjust-
ment mode must be set to the default (center).
Be sure to use the specified paper for color.
[Sharp gray chart] (UKOG-0162FCZZ)
The copy image density of Sharp gray chart must be as follows:
Note: Use the color test chart (UKOG-0283FCZZ) to check the
color balance.
(Color copy)
SHARP gray chart
Patch 1 is slightly copied.
SHARP GRAY CHART
1 2 3 4 5 6
Patch 2 is copied.
(Black-and-white copy)
SHARP gray chart
Patch 2 is slightly copied.
SHARP GRAY CHART
1 2 3 4 5 6
Patch 3 is copied.
Patch 1 is not copied.
[Serviceman chart] (UKOG-0283FCZZ)
Check the color balance of Serviceman chart copy is as shown
below.
(Color copy)
Serviceman chart (Color patch section)
The densities of patches 1 – 6 of
each color are properly balanced.
ADJ 11A CCD gamma adjustment
(CCD calibration)
(Normal document copy mode)
This adjustment must be performed in the following cases:
• When the CCD unit is replaced.
• When a U2 trouble occurs.
• When the MFP PWB is replaced.
• When the EEPROM of the MFP PWB is replaced.
• When replacing a part in the scanner (reading) section.
When the CCD unit is replaced, be sure to perform this adjust-
ment.
7 8 9 10 W
7 8 9 10 W
Patch 7 is slightly
copied or not copied.
AR-BC260 SETTING AND ADJUSTMENTS 8 - 25
(1) Precautions for adjustment
1) Check that the table glass and No. 1, 2, 3 mirrors and lenses
are free from dust and dirt. (If there is dust and dirt, clean with
alcohol.)
2) Check that there is no dirt or scratch on BK1 and BK2 patches
of SIT chart (UKOG-0280FCZZ).
If there is dirt, clean with alcohol.
If there is scratch, replace the chart with new one.
(2) Adjustment procedures
1) Set the SIT chart (UKOG-0280FCZZ) to the left edge of the
original table, and fit the center of SIT chart with the center of
the glass holder.
When SIT chart is not available, execute SIM 63-5 to set the CCD
gamma to the default. This method, however, provides a lower
adjustment accuracy than the method by using SIT chart.
Note: Check that the SIT chart (UKOG-0280FCZZ) is closely
placed on the original table.
2) With the SIT chart (UKOG-0280FCZZ) fixed, close the original
cover.
3) Enter the SIM 63-03 mode, and press the [EXECUTE] key.
The automatic adjustment is started. During the automatic
adjustment, the [EXECUTE] key is highlighted. When the
adjustment is completed, the key returns to the normal dis-
play.
Note: The SIT chart (UKOG-0280FCZZ) is affected by light (espe-
cially by ultraviolet rays) and temperature and humidity. Put
it in a bag (clear file, etc.) and store in a dark place.
ADJ 11B Copy color balance adjustment
(Auto adjustment)
This adjustment must be performed in the following cases:
• When a consumable part (developer, OPC drum, the transfer
belt) is replaced.
• When the CCD unit is replaced.
• When a U2 trouble occurs.
• When the MFP PWB is replaced.
• When the EEPROM of the MFP PWB is replaced.
The color balance adjustment (auto adjustment) is the automatic
adjustment of cyan, magenta, yellow, and black copy density with
SIM 46-24.
(When this adjustment is performed, the color balance adjust-
ments in all the copy modes are renewed.)
(Note for performing the color balance adjustment (Auto
adjustment))
1) The print engine section must be properly adjusted.
2) CCD gamma adjustment must be properly adjusted.
3) When setting the color patch image (adjustment pattern)
paper on the original table, place 5 sheets of white paper on
the color patch image paper.
4) Be sure to use the specified color paper.