Sharp MX 3501N - Color Laser - Copier, Service Manual

Page: 85 / 448

MX3500N ADJUSTMENTS 6 – 40
9) Make a copy of the servicing color test chart (UK0G-
0283FCZZ) and a user's document according to necessity in
the Text/Printed Photo mode (Manual) and check the adjust-
ment result again. (Refer to the item of the copy color balance/
density check.)
If the copy color balance and density are not in the specified
level, repeat procedures of 7) – 9) until they are in the speci-
fied range.
The number of repeat is, however, limited to 3 times.
If the copy color balance and density are not adjusted to the
specified level by repeating the procedures 3 times, there may
be another cause.
Troubleshoot the cause, and repair or perform proper treat-
ments, and try all the procedures of the print image adjustment
from the beginning.
(NOTE)
If the color balance is customized, use SIM 63-7 to register the
color balance as the service target.
If the color balance is not customized, this procedure is not
required.
If the customized color balance is registered as the service tar-
get, the automatic color balance adjustment can be made in
the next color balance adjustment.
In the next color balance adjustment, select the service target
color balance in the automatic color balance adjustment mode
to make an adjustment to the similar color balance as the reg-
istered color balance.
(Auto color balance adjustment target gamma setting)
a. General
When the automatic color balance adjustment is executed, a cer-
tain color balance (gamma) is used as the target.
There are following three kinds of the target.
• Factory color balance (gamma) target
• Service color balance (gamma) target
• User color balance (gamma) target
In the above three, only the service color balance target can be set
to a desired level.
This adjustment is required in the following cases:
* When the copy color balance/density adjustment (manual adjust-
ment) is executed with SIM 46-21).
* When a U2 trouble occurs.
* When the MFP PWB is replaced.
* When the EEPROM on the MFP PWB is replaced.
* When the scanner control PWB is replaced.
* When the EEPROM on the scanner control PWB is replaced.
* When the user requests for customizing the color balance.
* When the service color balance target gamma is judged as
improper.
• Each color balance target for the copy color balance adjustment
• Relationship between the factory target and the service target and the color balance target for the user color balance adjustment in the copy
color balance adjustment (SIM 46-24)
Kind Descriptions
A Factory
color
balance
(gamma)
target
There are three kinds of the color balance target, and each
of them is specified according to the machine design. Use
SIM 63-11 to select one of them as the factory target. The
default setting (factory setting) is the color balance (DEF1)
which emphasizes color reproduction.
B Service
color
balance
(gamma)
target
This target is used when the user requests to customize
the color balance to user’s desired level. In advance, the
user’s unique color balance must be registered as the
service color balance target.
The above registration (setting) is made by the serviceman
with SIM 46-21 to adjust the color balance and with SIM
63-7 to register it.
This color balance target is used when the user executes
the color balance adjustment.
When, therefore, the service color balance target is
changed, the color balance target of the user’s color
balance adjustment is also changed. When, however, SIM
63-8 is executed, the color balance is set to the factory
color balance target set with SIM 63-11.
The default setting (factory setting) of the color balance is
same as the factory color balance target. (Emphasized on
color reproduction (DEF1))
If the user does not request for customizing the color
balance, be sure to use SIM 63-8 to set the color balance
to the factory color balance target.
C User
color
balance
(gamma)
target
Same color balance as the service color balance (gamma)
target
When the service color balance target is changed, this
color balance target is also changed accordingly.
Factory color balance
target (DEF2)
Factory color balance
target (DEF1)
Factory color balance
target (DEF3)
Factory color balance
target (DEF1) Service color balance
target
=
Factory color balance
target (one of DEF1 – 3)
Service color balance
target
=
Factory color balance
target (one of DEF1 – 3) Service color balance
target (Unique)
≠
Use SIM 46-21 to adjust the
optional color balance, and
use SIM 63-7 to register it.
Execute SIM 63-8.
(The service color balance
target is the same as the
factory color balance target.)
Factory setting
Color balance target for
the user color balance
adjustment
Service color balance
target
=
Use SIM 63-11 to select
one of the three kinds of
color balance targets.
Color balance target in the copy color balance
automatic adjustment (SIM 46-24)
Color balance target in the user color balance adjustment