Sharp MX-M905 (serv.man2) Service Manual ▷ View online
MX-M905 ADJUSTMENTS 5 – 69
11-D
(13)
Watermark adjustment
(Normally not required)
Watermark adjustment
(Normally not required)
a. General
This adjustment is used to adjust the reproduction capability of the
watermark in the copy/printer mode.
watermark in the copy/printer mode.
This adjustment is used for watermark documents (primary output).
The result of this adjustment affects the result of watermark print
(secondary output).
The result of this adjustment affects the result of watermark print
(secondary output).
In the printer mode, the watermark density can be adjusted by the
printer driver. That adjustment is based on the result of this adjust-
ment.
printer driver. That adjustment is based on the result of this adjust-
ment.
This adjustment must be performed in the following cases:
* When there is request from the user. (When a satisfactory result
is not obtained from the adjustment in the system setting mode.)
* When there is request from the user. (When a satisfactory result
is not obtained from the adjustment with the printer driver.)
b. Adjustment procedures
1)
Enter the SIM 46-66 mode.
2)
Select the PATTERN mode, then select an adjustment item in
the following list according to the situation.
the following list according to the situation.
NOTE: Normally there is no need to adjust the PATTERN mode
(items E and F), the COPY MODE, and the POSITION
mode.
mode.
*1: When the adjustment value is varied by
1, the line space is varied by 0.1mm.
*2: When the adjustment value is varied by
1, the upper and the lower margins are varied by 0.1mm.
*3: When the adjustment value is varied by
1, the left and the right margins are varied by 0.1mm.
Category
Item
Display
Content
Setting
range
Default
value
PATTERN
A
WOVEN DEN BK LOW
Watermark density level (Black LOW)
0 - 255
15
B
WOVEN DEN BK MIDDLE
Watermark density level (Black MIDDLE)
0 - 255
19
C
WOVEN DEN BK HIGH
Watermark density level (Black HIGH)
0 - 255
23
D
CONTRAST
Contrast adjustment
0 - 255
2
E
HT TYPE (POSI)
For halftone index watermark type positive
42 - 43
42
F
HT TYPE (NEGA)
For halftone index watermark type negative
42 - 43
42
COPY
MODE
MODE
A
TEXT/PRINTED PHOTO
Text/Printed Photo mode select Enable/Disable
OFF
0 - 1
1
ON
B
TEXT
Text mode select Enable/Disable
OFF
0 - 1
1
ON
C
PRINTED PHOTO
Printed Photo mode select Enable/Disable
OFF
0 - 1
1
ON
D
PHOTOGRAPH
Photograph mode select Enable/Disable
OFF
0 - 1
1
ON
E
TEXT/PHOTO
Text/Photograph mode select Enable/Disable
OFF
0 - 1
1
ON
F
MAP
Map mode select Enable/Disable
OFF
0 - 1
1
ON
G
LIGHT
Light density document mode select Enable/Disable
OFF
0 - 1
1
ON
H
AUTO
Automatic mode select Enable/Disable
OFF
0 - 1
1
ON
I
DEFAULT MODE
Default exposure mode
TEXT/PRINTED PHOTO
0 - 5
0
Used to specify the exposure mode set
when the watermark is ON.
when the watermark is ON.
TEXT
PRINTED PHOTO
PHOTOGRAPH
TEXT/PHOTO
MAP
POSITION
A
LINE SPACE 1
Line space in the watermark print box (24P - 36P) (*1)
0 - 200
20
B
LINE SPACE 2
Line space in the watermark print box (37P - 48P) (*1)
0 - 200
20
C
LINE SPACE 3
Line space in the watermark print box (49P - 64P) (*1)
0 - 200
20
D
LINE SPACE 4
Line space in the watermark print box (65P - 80P) (*1)
0 - 200
20
E
BLANK H/B 1
Upper margin/Lower margin in the watermark print box (24P - 36P) (*2)
0 - 200
10
F
BLANK H/B 2
Upper margin/Lower margin in the watermark print box (37P - 48P) (*2)
0 - 200
10
G
BLANK H/B 3
Upper margin/Lower margin in the watermark print box (49P - 64P) (*2)
0 - 200
10
H
BLANK H/B 4
Upper margin/Lower margin in the watermark print box (65P - 80P) (*2)
0 - 200
10
I
BLANK L/R 1
Left margin/Right margin in the watermark print box (24P - 36P) (*3)
0 - 200
60
J
BLANK L/R 2
Left margin/Right margin in the watermark print box (37P - 48P) (*3)
0 - 200
90
K
BLANK L/R 3
Left margin/Right margin in the watermark print box (49P - 64P) (*3)
0 - 200
120
L
BLANK L/R 4
Left margin/Right margin in the watermark print box (65P - 80P) (*3)
0 - 200
150
MX-M905 ADJUSTMENTS 5 – 70
Changing adjustment values of adjustment items A - C
and trade off
and trade off
3)
Enter the adjustment value with 10-key and press [OK] key.
4)
Make a copy, and check the adjustment result.
Descriptions on the watermark
Watermark adjustment in the system setting
System setting
Security setting Watermark print
Contrast tab
NOTE:
Note for adjusting the watermark with SIM46-54
When the gray balance automatic adjustment is executed with
SIM46-74 or SIM46-24 but the containing characters are
reproduced, use SIM46-54 to execute the gray balance auto-
matic adjustment for each dither.
SIM46-74 or SIM46-24 but the containing characters are
reproduced, use SIM46-54 to execute the gray balance auto-
matic adjustment for each dither.
However, note the following items.
• When either of item E or F of the PATTERN mode is 42, the
adjustment must be executed for the both modes of
WOVEN1 and WOVEN2 of SIM46-54.
WOVEN1 and WOVEN2 of SIM46-54.
• When either of item E or F of the PATTERN mode is 43, the
adjustment must be executed for the both modes of
WOVEN3 and WOVEN4 of SIM46-54.
WOVEN3 and WOVEN4 of SIM46-54.
• WOVEN1 and WOVEN2 must be adjusted in a pair as well
as WOVEN3 and WOVEN4.
If it is ignored, the containing characters remain reproduced.
Kinds of
watermarks
(Mode
selected in
the watermark
copy mode)
Density
value
Adjustment
values of
adjustment
items A - C
Effect
Characters
appearing.
appearing.
Decrease.
The adjustment
value is
decreased.
value is
decreased.
The watermark images
become easy to
disappear.
The containing
characters become
lighter.
become easy to
disappear.
The containing
characters become
lighter.
Increase.
The adjustment
value is
increased.
value is
increased.
The containing
characters become
darker.
The watermark images
become difficult to
disappear.
characters become
darker.
The watermark images
become difficult to
disappear.
Background
appearing.
appearing.
Decrease.
The adjustment
value is
decreased.
value is
decreased.
The containing
characters become easy
to disappear.
The watermark images
become easy to
disappear.
characters become easy
to disappear.
The watermark images
become easy to
disappear.
Increase.
The adjustment
value is
increased.
value is
increased.
The watermark images
become darker.
The containing
characters become
difficult to disappear.
become darker.
The containing
characters become
difficult to disappear.
Containing
characters
characters
Characters embedded in a watermark, such as "COPY
INHIBITED," are called containing characters.
INHIBITED," are called containing characters.
Kinds of
watermarks
watermarks
There are two kinds: "Character appearing" and
"Background appearing."
When a watermark of "Character appearing" is copied, the
background disappears and the containing characters
appear.
When a watermark of "Background appearing" is copied,
the watermark of the character area disappears and the
containing characters become outline characters.
"Background appearing."
When a watermark of "Character appearing" is copied, the
background disappears and the containing characters
appear.
When a watermark of "Background appearing" is copied,
the watermark of the character area disappears and the
containing characters become outline characters.
Principle of
watermarks
watermarks
A watermark is composed of two dots: fine dots and rough
dots.
Since fine dots disappear when copied, they are called
disappearing patterns.
Since rough dots remain when copied, they are called
remaining patterns.
In a watermark of "Character appearing," the background is
a disappearing pattern and the containing characters are
remaining patterns.
In a watermark of "Background appearing," the background
is a remaining pattern and the containing characters are
disappearing patterns.
dots.
Since fine dots disappear when copied, they are called
disappearing patterns.
Since rough dots remain when copied, they are called
remaining patterns.
In a watermark of "Character appearing," the background is
a disappearing pattern and the containing characters are
remaining patterns.
In a watermark of "Background appearing," the background
is a remaining pattern and the containing characters are
disappearing patterns.
Document
(Copy document or
Print data)
(Copy document or
Print data)
Watermark document
(Primary output)
(Copy or Printer output)
(This machine)
(Primary output)
(Copy or Printer output)
(This machine)
Watermark copy
(Secondary output)
(This machine or other
company's machine)
(Secondary output)
(This machine or other
company's machine)
Copy / Print
Copy
COPY INHIBITED
COPY INHIBITED
COPY INHIBITED
Containing
characters
characters
NOTE:
Note for
watermarks
Note for
watermarks
Watermarks have the following characteristics:
• A watermark is presumed to be synthesized with text
• A watermark is presumed to be synthesized with text
documents. If it is used with photos or images, the
containing characters may be seen in the watermark
document (primary output) or the containing characters
may not appear properly in the watermark copy
(secondary output).
containing characters may be seen in the watermark
document (primary output) or the containing characters
may not appear properly in the watermark copy
(secondary output).
• When a watermark is synthesized with newspapers or
other dark-background documents, the containing
characters may not appear in the watermark copy
(secondary output).
characters may not appear in the watermark copy
(secondary output).
• Containing characters may not appear in the watermark
copy (secondary output) depending on the kind of the
copier which makes the watermark copy (secondary
output) and the copy mode.
copier which makes the watermark copy (secondary
output) and the copy mode.
• Containing characters may not appear clearly in the
watermark copy (secondary output) depending on the
copy mode in which the watermark document (primary
output) is made.
copy mode in which the watermark document (primary
output) is made.
• When the print engine status changes, the containing
characters may not be concealed properly in the
watermark document (primary output). In this case,
follow the procedures below to conceal the containing
characters.
* Use SIM46-24 to execute the gray balance
watermark document (primary output). In this case,
follow the procedures below to conceal the containing
characters.
* Use SIM46-24 to execute the gray balance
adjustment.
* Use SIM46-54 to execute the gray balance adjustment
for each dither.
* Adjust the watermark print contrast in the system
setting.
• The preview screen of the watermark only indicates the
setting of the watermark color, and does not indicate an
actual copy image.
actual copy image.
• When the document control (printer mode) is used
together, it is advisable to use "Characters appearing"
setting. If "Background appearing" setting is used
together, the detection accuracy of document control
may be reduced.
setting. If "Background appearing" setting is used
together, the detection accuracy of document control
may be reduced.
• In the printer mode watermark, setting of 1200dpi and a
watermark cannot be used together.
Watermark kind
mode selection
Density
Adjustment
Character
appearing
appearing
To increase the
text density
text density
Decrease the contrast value.
(Default: 5)
(Default: 5)
To decrease the
text density
text density
Increase the contrast value.
(Default value: 5)
(Default value: 5)
Background
appearing
appearing
To increase the
text density
text density
Increase the contrast value.
(Default value: 5)
(Default value: 5)
To decrease the
text density
text density
Decrease the contrast value.
(Default: 5)
(Default: 5)
MX-M905 ADJUSTMENTS 5 – 71
11-E
Printer image quality adjustment
(Basic adjustment)
(Basic adjustment)
Requisite condition before execution of the printer gray bal-
ance/density adjustment
ance/density adjustment
Before execution of the printer gray balance/density adjustment,
the copy gray balance/density adjustment must have been com-
pleted properly.
the copy gray balance/density adjustment must have been com-
pleted properly.
This adjustment is required in the following cases.
* Basically same as when the copy gray balance/density adjust-
ment is required.
* After the copy gray balance/density adjustment.
11-E
(1)
Printer gray balance adjustment
(Automatic adjustment)
Printer gray balance adjustment
(Automatic adjustment)
a. General
The gray balance adjustment (auto adjustment) is used to adjust
the print density of automatically with SIM 67-24 or the user pro-
gram.
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.
all the print modes are revised.
There are following two modes in the auto gray balance adjust-
ment.
ment.
1)
Auto gray balance adjustment by the serviceman (SIM 67-24 is
used.)
used.)
2)
Auto gray balance adjustment by the user (The user program
mode is used.) (The gray balance target is the service target.)
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.
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.
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.
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.
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.
understood.
MX-M905 ADJUSTMENTS 5 – 72
b. Adjustment procedure
(Auto gray balance adjustment by the serviceman)
Printer gray balance and density adjustment (Automatic adjustment) procedure
flowchart (SIM67-24)
flowchart (SIM67-24)
Start
Execute ADJ11E(1) (Printer gray balance and density
adjustment) (Automatic adjustment).
adjustment) (Automatic adjustment).
Enter the SIM67-24 mode, and select A4
(11" x 8.5") paper.
(11" x 8.5") paper.
Press [EXECUTE] key.
(The adjustment pattern is printed.)
(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)
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)
unclear copy. (*4)
Press [OK] key. (The initial setting of the halftone
image correction is automatically performed.) (*2)
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.
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)
adjustment) (Manual adjustment). (SIM67-25) (*3)
YES
NO
Are the gray balance and
density at the satisfactory
level?
density at the satisfactory
level?
End
Use SIM64-5 to print the self print check pattern,
and check the printer gray balance and density.
and check the printer gray balance and density.
Check the self print check pattern to check the printer
gray balance and density adjustment.
gray balance and density adjustment.
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