DOWNLOAD Sharp MX-M1055 / MX-M1205 Service Manual ↓ Size: 92.17 MB | Pages: 127 in PDF or view online for FREE

MX-M1205  ADJUSTMENTS  5 – 69

 

Before execution of the printer gray balance/density adjustment,
the copy gray balance/density adjustment must have been com-
pleted properly.

* Basically same as when the copy gray balance/density adjust-

ment is required.

* After the copy gray balance/density adjustment.

 

The gray balance adjustment (auto adjustment) is used to adjust
the print density of automatically with SIM 67-24 or the user pro-
gram.

When this adjustment is executed, the gray balance adjustments of
all the print modes are revised.

There are following two modes in the auto gray balance adjust-
ment.

1)

Auto gray balance adjustment by the serviceman (SIM 67-24 is
used.)

2)

Auto gray balance adjustment by the user (The user program
mode is used.) (The gray balance target is the service target.)

The auto gray balance adjustment by the user is provided to
reduce the number of service calls.

If the print gray balance is lost for some reasons, the user can
use this gray balance adjustment to recover the balance.

When, however, the machine has a fatal problem or when the
machine condition is greatly changed, this function does not
work effectively.

On the other hand, the auto gray balance adjustment by the
serviceman functions to recover the normal gray balance
though the machine condition is greatly changed. If the
machine has a fatal problem, repair and adjust it for obtaining
the normal gray balance.

To perform the adjustment, the above difference must be fully
understood.

MX-M1205  ADJUSTMENTS  5 – 70

(Auto gray balance adjustment by the serviceman)

Printer gray balance and density adjustment (Automatic adjustment) procedure 
flowchart (SIM67-24)

Start

Execute ADJ11E(1) (Printer gray balance and density 
adjustment) (Automatic adjustment).

Enter the SIM67-24 mode, and select A4 
(11" x 8.5") paper.

Press [EXECUTE] key. 
(The adjustment pattern is printed.)

Set the adjustment pattern on the document table. 
Select the FACTORY target or the SERVICE target, 
and press [EXECUTE] key. (The adjustment pattern 
is scanned, and the adjustment is automatically 
performed to print the check pattern.) (*1)

Check the printed check pattern for any streaks or 
unclear copy. (*4)

Press [OK] key. (The initial setting of the halftone 
image correction is automatically performed.) (*2)

Cancel SIM67-24.

*1:
When the gray balance and density are customized and 
registered as the SERVICE target, select the SERVICE 
target. 
*2: 
If the initial setting of the halftone image correction is not 
properly adjusted, satisfactory gray balance and density 
cannot be obtained. In this case, check the print engine for 
any problems. 
*3:
If satisfactory gray balance and density are not obtained 
with ADJ11E(2) (Printer gray balance and density 
adjustment) (Manual adjustment) (SIM67-25), check the 
print engine for any problems. 
*4:
If there is any streak or unclear copy on the printed check 
pattern, check the print engine for any problems.

Execute ADJ11E(2) (Printer gray balance and density 
adjustment) (Manual adjustment). (SIM67-25) (*3)

YES

NO

Are the gray balance and 
density at the satisfactory 
level?

End

Use SIM64-5 to print the self print check pattern, 
and check the printer gray balance and density.

Check the self print check pattern to check the printer 
gray balance and density adjustment. 

MX-M1205  ADJUSTMENTS  5 – 71

1)

Enter the SIM 67-24 mode.

2)

Press [EXECUTE] key. (A4/11" x 8.5" or A3/11" x 17" paper is
automatically selected.)

The gray patch image (adjustment pattern) is printed out.

3)

Set the gray patch image (adjustment pattern) paper printed in
procedure 2) on the document table.

Place the printed gray patch image (adjustment pattern) paper
on the document table so that the thin lines on the paper are
on the left side. Place 5 sheets of white paper on the printed
gray patch image (adjustment pattern) paper.

4)

Select [FACTORY] key, and press [EXECUTE] key.

When the gray balance is customized with the manual gray
balance adjustment (SIM 67-25) according to the user's
request and the gray balance is registered as the service tar-
get with SIM 67-27, if the gray balance is adjusted to that gray
balance, select the service target.

The copy gray balance adjustment is automatically executed
and prints the gray balance check patch image. Wait until the
operation panel shown in the procedure 5) is displayed.

5)

Press [OK] key on the operation panel.

NOTE:

After pressing [OK] key, the initial setting of the halftone image
correction is started. During the operation, "NOW REGISTER-
ING THE NEW TARGET OF HALFTONE" is displayed. This
operation takes several minutes.

After completion of the operation, "PLEASE QUIT THIS
MODE" is displayed.

Do not cancel the simulation until "PLEASE QUIT THIS
MODE" is displayed.

After completion of the operation, the simulation is canceled.

6)

Check the gray balance and density.

(Refer to the item of the printer gray balance and density
check.)

If a satisfactory result on the gray balance and the density is
not obtained with the automatic adjustment, execute the man-
ual adjustment (SIM 67-25) (ADJ 11E (2)).

Also when the service target is selected in procedure 4) to exe-
cute the automatic adjustment and a satisfactory result is not
obtained, perform the manual gray balance adjustment (ADJ
11E (2)).

If the gray balance or density is not in the satisfactory level even
after execution of the automatic and manual adjustments, there
may be another cause.

Troubleshoot the cause, repair or perform necessary works, and
repeat the adjustment from the beginning.
 

MX-M1205  ADJUSTMENTS  5 – 72

 

The gray balance adjustment (Manual adjustment) is used to adjust
the printer density. This is used at the following situation. When the
result of auto adjustment described above is not existing within the
range of reference. When a fine adjustment is required. When
there is request from the user for changing (customizing) the gray
balance.

In this manual adjustment, adjust only the gray patch which could
not adjusted properly in the automatic adjustment.

If the gray balance is improper, execute the automatic gray balance
adjustment in advance, and execute this adjustment for better effi-
ciency.

1)

Enter the SIM 67-25 mode.

2)

Press [EXECUTE] key. (A4/11" x 8.5" or A3/11" x 17" paper is
automatically selected.)

The gray balance adjustment pattern is printed.

3)

Check that the following specification is satisfied or the gray
balance is satisfactory.

If not, execute the following procedures.

The print density must be changed gradually from the lighter
level to the darker level. The density changing direction must
not be reversed.

Patch B may not be copied.

Patch A must not be copied.

When, however, the gray balance is adjusted according to a
request from the user, there is no need to set to the standard
gray balance stated above.

4)

Enter the adjustment value with 10-key and press [OK] key.

The adjustment value is set in the range of (1 - 999). When
SIM 67-24 is used to adjust the automatic gray balance and
density, all the set values of this simulation are set to 500.

To increase the density, increase the adjustment value. To
decrease the density, decrease the adjustment value.

Repeat procedures of 2) - 4) until the condition of 3) is satis-
fied.

When the overall density is low, or when the density is high
and patch A is copied, use the arrow key to adjust all the
adjustment values of A - Q (MAX) to a same level collectively.

Then, adjust each patch density individually. This is an efficient
way of adjustment.

5)

Check the gray balance and density.

(Refer to the item of the printer gray balance and density
check.)

NOTE:

If the gray balance is customized, use SIM 67-27 to register
the gray balance as the service target.

If the gray balance is not customized, this procedure is not
required.

If the customized gray balance is registered as the service tar-
get, the automatic gray balance adjustment can be made in
the next gray balance adjustment.

YES

NO

Printer gray balance and density adjustment (Manual adjustment) procedure 
flowchart (SIM67-25)

Start

Execute ADJ11E(2) (Printer gray balance and density 
adjustment (Manual adjustment). (*1)

Enter the SIM67-25 mode, and select A4 
(11" x 8.5") paper. (Automatic selection.)

Press [EXECUTE] key. 
(The adjustment pattern is printed.)

Select a target adjustment density level with the 
scroll key.

Enter the adjustment value with 10-key. 

Press [EXECUTE] key. 
(The adjustment pattern is printed.)

Are the gray balance 
and density at the sati-
sfactory level?

Cancel the SIM67-25 mode.

End

Check the gray balance and density in the gray 
balance check pattern.

*1: 
If satisfactory gray balance and density are not 
obtained with the adjustment, check the print 
engine for any problems. 

YES

NO

Are the gray balance and 
density at the satisfactory 
level?

Use SIM64-5 to print the self print 
check pattern, and check the printer gray balance and density.

Refer to the printed adjustment check pattern.

Check the self print check pattern to check the printer gray balance and 
density adjustment. 

Set the SERVICE target for the automatic printer gray balance 
adjustment. (SIM67-27)

Q

O P

N

M

L

K

J

I

H

G

F

E

D

C

B

A

Bk

1) The max. density section is not blurred.

2) Patch C or D is very slightly copied.

3)  The patch density is identical between patches or not reversed.

The patch density is changed gradually.

High density

Low density