DOWNLOAD Sharp MX-M905 (serv.man2) Service Manual ↓ Size: 90.97 MB | Pages: 127 in PDF or view online for FREE

Model
MX-M905 (serv.man2)
Pages
127
Size
90.97 MB
Type
PDF
Document
Service Manual
Brand
Device
Copying Equipment / Service Manual (Revised May 2017).
File
mx-m905-sm2.pdf
Date

Sharp MX-M905 (serv.man2) Service Manual ▷ View online

MX-M905  ADJUSTMENTS  5 – 57
Troubleshoot the cause, repair or perform necessary works, and
repeat the adjustment from the beginning.
When the gray balance and the density are unsatisfactory after the
automatic adjustment by selecting the factory target in procedure
4), execute the manual adjustment (SIM46-16)(ADJ11C (2)).
Also when the service target is selected in procedure 7) to execute
the automatic adjustment and a satisfactory result is not obtained,
perform the manual gray balance adjustment (ADJ 11C(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.
 
11-C
(2)
Copy gray balance and density adjustment 
(Manual adjustment)
a. General
The gray balance adjustment (Manual adjustment) is used to adjust
the copy 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.
This manual adjustment is executed only for 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.
MX-M905  ADJUSTMENTS  5 – 58
b. Adjustment procedure
YES
NO
YES
NO
NO
YES
Copy gray balance and density adjustment (Manual adjustment) procedure
flowchart (SIM46-16)
Start
Execute ADJ11C(2) (Copy gray balance and density adjustment)
(Manual adjustment). (*1)
Enter the SIM46-16 mode, and select A4 (11" x 8.5") paper. 
(Automatic selection)
Press [EXECUTE] key.
(The adjustment check pattern is printed.)
Enter the adjustment value with 10-key.
Refer to the printed adjustment check pattern.
Select a target adjustment level with the scroll key.
Are the gray balance
and density at the sati-
sfactory level?
Press [EXECUTE] key.
(The adjustment check pattern is printed.)
Are the gray balance
and density at the sati-
sfactory level?
Are the gray balance
and density at the sati-
sfactory level?
Cancel the SIM46-16 mode.
Perform the initial setting of the halftone image correction.
(SIM44-21)
Check the copy gray balance and density adjustment result with the
test chart. (*1)
Use the test chart (UKOG-0326FCZZ/UKOG-0326FC11)
to make a copy in the Text/Printed Photo mode, and check
the gray balance and density.
Check to confirm that the initial setting of the halftone image correction is
properly set. (*2)
Perform the initial setting of the halftone image correction.
(SIM44-21)
Perform the halftone image correction. (SIM44-26)
Use the test chart (UKOG-0326FCZZ/UKOG-0326FC11)
to make a copy in the Text/Printed Photo mode, and check
the gray balance and density.
Set the SERVICE target for the automatic copy gray 
balance adjustment. (SIM63-7)
End
*1:
If satisfactory gray balance and density are not
obtained with the adjustment, check the print
engine for any problems.
*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.
Check the gray balance and density in the gray balance 
check pattern.
MX-M905  ADJUSTMENTS  5 – 59
1)
Enter the SIM46-16 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 46-24 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.
5)
Make a copy of the servicing color test chart (UKOG-
0326FCZZ/UKOG-0326FC11) and a user's document accord-
ing to necessity in the normal copy mode, the text/Printed
Photo mode (Manual) to check the adjustment result.
(Refer to the item of the copy gray balance/density check.)
6)
Execute SIM 44-21. (Execute the initial setting of the halftone
image correction.)
It takes several minutes to complete the operation. After com-
pletion of the operation, "COMPLETE" is displayed.
After completion of the operation, the simulation is canceled.
NOTE:
This procedure is to save the copy gray balance adjustment
data as the reference data for the halftone correction.
Immediately after execution of ADJ 11C (2) (Gray balance
adjustment, Manual) with SIM 46-16, be sure to execute this
procedure.
When ADJ 11C (1) (Gray balance adjustment, Auto) is exe-
cuted with SIM 46-24, this procedure is automatically exe-
cuted.
7)
Use SIM 44-26 to execute the halftone image correction.
(Forcible execution)
Enter the SIM 44-26 mode and press [EXECUTE] key.
[EXECUTE] key is highlighted and the operation is started.
It takes several minutes to complete the operation. After com-
pletion of the operation, "COMPLETE" is displayed.
After completion of the operation, the simulation is canceled.
8)
Make a copy of the servicing color test chart (UKOG-
0317FCZZ/UKOG-0317FC11) and a user's document accord-
ing to necessity in the Text/Printed Photo mode (Manual) and
check the adjustment result again. (Refer to the item of the
copy gray balance/density check.)
If the copy gray balance and density are not adjusted to the
specified level, 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 gray balance is customized, use SIM 63-7 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.
3
1 2
0
/
.
-
,
+
*
)
(
'
&
%
$
#
$M
High 
density
1) The max. density section is not blurred.
2) Patch C or D is very slightly copied.
Low 
density
3)  The patch density is identical between patches or not reversed.
The patch density is changed gradually.
MX-M905  ADJUSTMENTS  5 – 60
 
11-D
Copy / Image send / FAX image quality 
adjustment (Individual adjustment)
a. General
This adjustment is used to execute the fine adjustment in each mode only when a satisfactory image quality is not obtained by the basic adjust-
ments ADJ 11B and ADJ 11C or there is a request from the user. Normally there is no need to execute this adjustment.
In this adjustment, the adjustment result may be applied to the image send mode and the FAX mode as well as the copy mode.
This must be well understood for execution of the adjustment.
Copy MODE
IMAGE SEND(SCAN) MODE
Monochrome 
mode
Color mode
Monochrome 
mode
Auto
Manual
Auto
Manual
Auto
Manual
FAX
Printer
46-02
Monochrome copy density adjustment (for each monochrome copy mode) 
(separately for the low-density area and the high-density area) (No need to 
adjust normally)
-
-
-
-
-
-
46-04
Color image send mode image density adjustment (for each mode) (No 
need to adjust normally)
-
-
-
-
-
-
46-05
Monochrome image send mode image density adjustment (for each mode) 
(No need to adjust normally)
-
-
-
-
-
-
46-08
Image send mode RGB gray balance adjustment (separately for the low-
density area and the high-density area) (No need to adjust normally)
-
-
-
-
-
-
46-09
DSPF mode (Copy/Scan/FAX) density adjustment 
(No need to adjust normally)
-
46-10
Copy gray balance, gamma adjustment (for each copy mode) (No need to 
adjust normally)
-
-
-
-
-
-
46-16
Monochrome copy density, gamma adjustment (for each monochrome 
copy mode) (No need to adjust normally)
-
-
-
-
-
-
46-19
Automatic monochrome (Copy/Scan/FAX) mode document density 
scanning operation (exposure operation) conditions setting 
(Normally no need to set)
-
-
-
-
-
46-23
Copy high density image density reproduction setting 
(Normally unnecessary to the setting change)
-
-
-
-
-
-
46-24
Copy gray balance and density adjustment (Automatic adjustment)
-
-
-
-
-
-
46-27
Color copy, text, line image reproduction adjustment (edge gamma, 
density adjustment) (Text, Map mode) (No need to adjust normally)
-
-
-
-
-
-
-
-
46-32
Document low density image density reproduction adjustment in the 
automatic monochrome (Copy/Scan/FAX) mode 
(No need to adjust normally) (Background density adjustment in the 
scanning section)
-
-
-
-
-
46-37
Monochrome (Copy/Scan/FAX) mode color document reproduction 
adjustment (No need to adjust normally)
-
-
46-39
FAX  send  image  sharpness  adjustment
-
-
-
-
-
-
-
46-40
FAX send image density adjustment 
(Collective adjustment of all the modes)
-
-
-
-
-
-
-
46-41
FAX  send  image  density  adjustment  (Normal  text  mode)
-
-
-
-
-
-
-
46-42
FAX send image density adjustment (Fine text mode)
-
-
-
-
-
-
-
46-43
FAX send image density adjustment (Super fine mode)
-
-
-
-
-
-
-
46-44
FAX  send  image  density  adjustment  (Ultra  fine  mode)
-
-
-
-
-
-
-
46-45
FAX send image density adjustment (600dpi mode)
-
-
-
-
-
-
-
46-46
FAX  send  image  density  adjustment  (RGB_RIP)
-
-
-
-
-
-
-
46-47
Copy image, image send image, FAX send image (JPEG) compression 
ratio setting (Normally unnecessary to the setting change)
46-48
Copy output resolution setting
-
-
-
-
-
-
46-51
Gamma manual adjustment for the copy mode heavy paper and the image 
process mode (dither) (No need to adjust normally)
-
-
-
-
-
-
46-52
Gamma default setting for the copy mode heavy paper and the image 
process mode (dither)
-
-
-
-
-
-
46-54
Copy gamma, gray balance adjustment for each dither (Automatic 
adjustment) (No need to adjust normally)
-
-
-
-
-
-
46-55
Dropout  color  setting
-
-
-
-
-
-
-
46-60
Color (Scan) mode sharpness adjustment (No need to adjust normally)
-
-
-
-
-
-
46-61
Area separation recognition level adjustment (No need to adjust normally)
-
-
46-62
ACS, area separation, background image process, automatic exposure 
mode operation conditions setting (Normally unnecessary to the setting 
change)
-
-
46-63
Copy/Scan low density image density adjustment (for each mode) 
(No need to adjust normally)
-
-
46-66
Watermark adjustment
-
-
-
-
-
-
46-74
Printer/Copy gray balance and density adjustment (Automatic adjustment) 
(Basic adjustment)
-
-
-
-
-
46-90
High-compression PDF image process operation setting (Normally 
unnecessary to the setting change)
-
-
-
-
-
-
46-91
Black text emphasis fine adjustment
-
-
-
-
-
-
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