Sharp AR-BC260 Service Manual page 120

High density
C
M
Y
Bk
CMY
mixed
color
Max O N M L K J
1) The max. density section is not blurred.
4) Patch for each of C, M, Y, BK
• The patch density is identical between patches or not reversed.
• The patch density is changed gradually.
If, however, the user requests to customize the color balance
instead of using the standard color balance and the color balance
is in a satisfactory level, go to Step 10).
If the color balance is not satisfactory, perform the manual color
balance adjustment (ADJ 11C).
7) Execute the half tone image correction. (Forcible execution)
(SIM 44-26)
Normal completion
When [EXECUTE] key is pressed, it is highlighted and the opera-
tion is started. It takes several minutes to complete the operation.
When the operation is completed, the screen returns to the origi-
nal state.
After completion of the operation, cancel the simulation.
8) Use the test chart UKOG-0283FCZZ and check the copy color
balance and the density in Text/Photo mode. (Refer to the
section of the copy color balance and the density.)
If the copy color balance and density are not in the satisfactory
level, perform the following procedures.
9) Perform initial setup of half tone image correction. (SIM 44-21)
10) Perform half tone image correction. (Forcible execution) (SIM
44-26)
11) Use the test chart UKOG-0283FCZZ and check the copy color
balance and the density in manual Text/Printed photo mode.
(Refer to the section of the copy color balance and the den-
sity.)
Repeat procedures 9) to 11) until they are at the satisfactory level.
However, repetition is limited to three times.
If a satisfactory result in the copy color balance or the density can-
not be obtained by repetition of the above procedures 3 times or
more, there may be a problem in some other sections.
Investigate the reason and repair or fix the problem, then perform
all the procedures of print quality adjustment from the beginning.
If a satisfactory result in the copy color balance or the density can-
not be obtained by the automatic adjustment, use SIM46-21 (ADJ
11C) (automatic adjustment).
Low density
I H G F E D C B A
3) Patch C or D of each of Y, C, M,
and BK is very slightly copied.
2) Patch A of each of Y, M,
C, and BK are not copied.
Abnormal completion
(Error color is displayed.)
AR-BC260 SETTING AND ADJUSTMENTS 8 - 27
ADJ 11C Copy color balance adjustment
(Manual 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 the scanner (reading) section is cleaned.
• When a U2 trouble occurs.
• When the MFP PWB is replaced.
• When the EEPROM of the MFP PWB is replaced.
The color balance adjustment (Manual) is used to manually adjust
each color copy density (C, Y, M, K) (15 points for each color)
when the result of the previous automatic adjustment is unsatis-
factory or when a fine adjustment is required, or when the user
requests to change (customize) the color balance.
a. Note for the adjustment
This adjustment is performed only for the color patch whose result
of the previous automatic adjustment is unsatisfactory.
If the color balance is out of the normal conditions, execute SIM
46-24 to make the color balance adjustment (Auto) and then exe-
cute this adjustment. This sequence leads to a better work effi-
ciency.
Before execution of the copy quality check and the copy quality
adjustment, be sure to execute the following corrections forcibly to
set the image forming section to the optimum state.
∗ Execute the process correction forcibly. (SIM 44-6)
∗ Execute the half tone image correction forcibly. (SIM 44-26)
b. Adjustment procedures
∗ Before executing the copy color balance adjustment (Manual),
perform SIM 44-6 to make a compulsory process correction,
updating the developing bias voltage and the main charger volt-
age to the latest levels.
When [EXECUTE] key is pressed, the operation is started.
It takes several minutes to complete the operation. When the
operation is completed, "EXECUTE" is highlighted.
After completion of the operation, cancel the simulation.
∗ Before executing the copy color balance adjustment (Manual),
perform SIM 44-26 to make a compulsory half tone correction,
updating the engine color balance and the gradation.
When [EXECUTE] key is pressed, the operation is started.
It takes several minutes to complete the operation. When the
operation is completed, "EXECUTE" is highlighted.
After completion of the operation, cancel the simulation.
1) Enter the SIM 46-21 mode.