MX-M364N, MX-565N (serv.man4). Service Manual (Revised January 2016). - Sharp Copying Equipment Service Manual (repair manual). Page 83

MX-M565N  ADJUSTMENTS AND SETTINGS  4 – 53

3)

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

4)

Make a copy, and check the adjustment result.

System setting   Security setting   Watermark print   
Contrast tab

NOTE:

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.

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.

* 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.

* WOVEN1 and WOVEN2 must be adjusted in a pair as well

as WOVEN3 and WOVEN4.

If it is ignored, the containing characters remain reproduced.

Characters 
appearing.

Decrease.

The adjustment 
value is 
decreased.

The watermark images 
become easy to 
disappear.
The containing 
characters become 
lighter. 

Increase.

The adjustment 
value is 
increased.

The containing 
characters become 
darker.
The watermark images 
become difficult to 
disappear.

Background 
appearing.

Decrease.

The adjustment 
value is 
decreased.

The containing 
characters become easy 
to disappear.
The watermark images 
become easy to 
disappear.

Increase.

The adjustment 
value is 
increased.

The watermark images 
become darker.
The containing 
characters become 
difficult to disappear.

Containing 
characters

Characters embedded in a watermark, such as "COPY 
INHIBITED," are called containing characters.

Kinds of 
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.

Principle of 
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.

Document

(Copy document or

Print data)

Watermark document 

(Primary output) 

(Copy or Printer output) 

(This machine)

Watermark copy 

(Secondary output) 

(This machine or other 

company's machine)

Copy / Print

Copy

COPY INHIBITED

COPY INHIBITED

COPY INHIBITED

Containing

characters

NOTE:
Note for 
watermarks

Watermarks have the following characteristics:
* 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).

* When a watermark is synthesized with newspapers or 

other dark-background documents, the containing 
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.

* 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.

* 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 

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.

* 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.

* In the printer mode watermark, setting of 1200dpi and a 

watermark cannot be used together.

Character 
appearing

To increase the 
text density

Decrease the contrast value. 
(Default: 5)

To decrease the 
text density

Increase the contrast value. 
(Default value: 5)

Background 
appearing

To increase the 
text density

Increase the contrast value. 
(Default value: 5)

To decrease the 
text density

Decrease the contrast value. 
(Default: 5)