Sharp MX-6500N / MX-7500N (serv.man19) Service Manual ▷ View online
MX-7500N ADJUSTMENTS AND SETTINGS 5 – 2
ADJ 9/
SET1
SET1
Color balance/density
adjustment
adjustment
9D
Copy / Image
send / FAX image
quality adjustment
(Individual
adjustment)
send / FAX image
quality adjustment
(Individual
adjustment)
9D
(7)
(7)
Copy/Scan low density image density adjustment (for each mode)
(No need to adjust normally)
(No need to adjust normally)
46-63
9D
(8)
(8)
Color copy, text, line image reproduction adjustment (edge gamma,
density adjustment) (Text, Map mode) (No need to adjust normally)
density adjustment) (Text, Map mode) (No need to adjust normally)
46-27
9D
(9)
(9)
Monochrome (Copy/Scan/FAX) mode color document reproduction
adjustment (No need to adjust normally)
adjustment (No need to adjust normally)
46-37
9D
(10)
Color copy mode dark area gradation (black component quantity)
adjustment (No need to adjust normally)
adjustment (No need to adjust normally)
46-38
9D
(11)
Color (Copy/Scan) mode sharpness adjustment
(No need to adjust normally)
(No need to adjust normally)
46-60
9D
(12)
Copy high density image density reproduction setting
(Normally unnecessary to the setting change)
(Normally unnecessary to the setting change)
46-23
9D
(13)
Copy color balance adjustment (Single color copy mode)
(No need to adjust normally)
(No need to adjust normally)
46-25
9D
(14)
DSPF mode (Copy/Scan/FAX) density adjustment
(No need to adjust normally)
(No need to adjust normally)
46-9
9D
(15)
Automatic color balance adjustment by the user
(Copy color balance automatic adjustment ENABLE setting and
adjustment)
(Copy color balance automatic adjustment ENABLE setting and
adjustment)
26-53
9D
(16)
Copy gamma, color balance adjustment for each dither (Automatic
adjustment)
adjustment)
46-54
9D
(17)
Dropout color adjustment (Normally not required)
46-55
9D
(18)
Watermark adjustment (Normally not required)
46-66
9E
Printer image
quality adjustment
(Basic
adjustment)
quality adjustment
(Basic
adjustment)
9E
(1)
(1)
Printer color balance adjustment (Automatic adjustment)
67-24
9E
(2)
(2)
Printer color balance adjustment (Manual adjustment)
67-25
9F
Printer image
quality adjustment
(Individual
adjustment)
quality adjustment
(Individual
adjustment)
9F
(1)
(1)
Printer density adjustment (Low density section density adjustment)
(No need to adjust normally)
(No need to adjust normally)
67-36
9F
(2)
(2)
Printer high density image density reproduction setting (Supporting
the high density section tone gap) (No need to adjust normally)
the high density section tone gap) (No need to adjust normally)
67-34
9F
(3)
(3)
Printer gamma adjustment for each dither
(Automatic adjustment) (No need to adjust normally)
(Automatic adjustment) (No need to adjust normally)
67-54
9F
(4)
(4)
Automatic color balance adjustment by the user
(Printer color balance automatic adjustment ENABLE setting and
adjustment) (Normally unnecessary to the setting change)
(Printer color balance automatic adjustment ENABLE setting and
adjustment) (Normally unnecessary to the setting change)
26-53
ADJ 10
Manual paper feed tray paper size (width) sensor adjustment
40-2
ADJ 11
DSPF tray paper size (width) sensor adjustment
53-6
ADJ 12
Document size detection
adjustment
adjustment
12A
Document size sensor detection point adjustment
41-1
12B
Adjust the sensitivity of the original size sensor
41-2
ADJ 13
Touch panel coordinate setting
65-1
ADJ 14
Fusing paper guide position adjustment
ADJ 15
Print image manual
magnification ratio, area,
position adjustment
(Manual adjustment)
magnification ratio, area,
position adjustment
(Manual adjustment)
15A
Print image manual magnification ratio adjustment (Main scanning direction) (Print engine)
50-10
15B
Print image manual area adjustment (Main scanning direction, sub scanning direction) (Print
engine)
engine)
50-10 / 50-1
15C
Print image manual position adjustment (Main scanning direction, sub scanning direction) (Print
engine) (Each paper feed tray)
engine) (Each paper feed tray)
50-10
ADJ 16
Scan image magnification
ratio adjustment
(Manual adjustment)
ratio adjustment
(Manual adjustment)
16A
Scan image magnification ratio adjustment (main scanning direction) (Manual adjustment)
(Document table mode)
(Document table mode)
48-1
16B
Scan image magnification ratio adjustment (sub scanning direction) (Manual adjustment)
(Document table mode)
(Document table mode)
48-1
16C
Scan image magnification ratio adjustment (main scanning direction) (Manual adjustment)
(DSPF mode)
(DSPF mode)
48-1
16D
Scan image magnification ratio adjustment (sub scanning direction) (Manual adjustment)
(DSPF mode)
(DSPF mode)
48-1
ADJ 17
Scan image off-center
adjustment
(Manual adjustment)
adjustment
(Manual adjustment)
17A
Scan image off-center adjustment (Manual adjustment) (Document table mode)
50-12
17B
Scan image off-center adjustment (Manual adjustment) (DSPF mode)
50-12 / 50-6
ADJ 18
Copy image position and
image loss adjustment
(Manual adjustment)
image loss adjustment
(Manual adjustment)
18A
Copy image position, image loss, and void area adjustment (Manual adjustment) (Document table
mode)
mode)
50-1
18B
Image scanning position adjustment (Manual adjustment) (DSPF mode)
53-8
18C
Copy image position, image loss, void area adjustment (Manual adjustment) (DSPF mode)
50-6
ADJ 19
Finisher and punch unit adjustments (alignment, punch hole position, staple position)
3-10
ADJ 20
DSPF CCD calibration
20A
Shading adjustment (Calibration) (DSPF mode)
63-2
20B
CCD gamma adjustment (CCD calibration) (DSPF mode)
63-3
ADJ 21
DSPF back surface color balance exposure adjustment (Manual adjustment)
46-9
ADJ22
FR density variation
correction
correction
22A
FR density unevenness automatic correction: all 32-point adjustment (Correction by OC scan)
61-11
22B
FR density unevenness visual inspection correction: 4-point adjustment for each of CMYK (with
the center fixed) or 31-point adjustment (with the center fixed)
the center fixed) or 31-point adjustment (with the center fixed)
61-12
Job No
Adjustment item list
Simulation
MX-7500N ADJUSTMENTS AND SETTINGS 5 – 3
3. Details of adjustment
ADJ 1
Adjust the developing unit
1-A
Adjust the developing doctor gap
This adjustment must be performed in the following cases:
* The developing unit has been disassembled.
* When the print image density is low.
* When there is a blur on the print image.
* When there is unevenness in the print image density.
* The toner is excessively dispersed.
1)
Remove the developing unit from the main unit, and remove
the developing unit upper cover and the developing doctor
cover.
the developing unit upper cover and the developing doctor
cover.
2)
Loosen the developing doctor fixing screw.
3)
Insert a thickness gauge of 0.775mm in between 40mm -
70mm from the edge of the developing doctor.
70mm from the edge of the developing doctor.
4)
Push the developing doctor in the arrow direction, and tighten
the fixing screw of the developing doctor. (Perform the similar
procedure for the front frame and the rear frame.)
the fixing screw of the developing doctor. (Perform the similar
procedure for the front frame and the rear frame.)
5)
Check that the doctor gaps at two positions in 40mm - 70mm
from the both sides of the developing doctor are in the range of
0.775 +/- 0.05mm.
from the both sides of the developing doctor are in the range of
0.775 +/- 0.05mm.
* When inserting a thickness gauge, be careful not to scratch the
developing doctor and the developing roller.
1
2
70mm
70mm
40mm
40mm
70mm
70mm
40mm
40mm
MX-7500N ADJUSTMENTS AND SETTINGS 5 – 4
Note for use of a thickness gauge
- Do not insert the gauge diagonally.
- The gauge must pass freely.
- The advisable point of measurement is the MIN point of the MG
roller oscillation.
Marked point (A) on the drive side (left side) of the MG roller.
1-B
Adjust the developing roller main pole
position
position
This adjustment must be performed in the following cases:
* The developing unit has been disassembled.
* When the print image density is low.
* When there is a blur on the print image.
* When there is unevenness in the print image density.
* The toner is excessively dispersed.
1)
Remove the developing doctor cover, and place the develop-
ing unit on a flat surface.
ing unit on a flat surface.
2)
Attach a piece of string to a sewing needle or pin.
3)
Hold the thread and bring the needle near the developing
roller. (Do not use a paper clip because too heavy. It will not
provide a correct position.)
roller. (Do not use a paper clip because too heavy. It will not
provide a correct position.)
4)
Mark the developing roller surface on the extension line of the
needle with the needle at 2 - 3mm from the developing roller
surface. (Never touch the needle tip with the developing roller.)
needle with the needle at 2 - 3mm from the developing roller
surface. (Never touch the needle tip with the developing roller.)
5)
Measure the distance between the marking position and posi-
tion A of the developing unit frame, and check that it is 46.4 +/-
0.5mm.
tion A of the developing unit frame, and check that it is 46.4 +/-
0.5mm.
If the distance is not within the above range, adjust the devel-
oping roller main pole position in the following procedures.
oping roller main pole position in the following procedures.
6)
Loosen the fixing screw of the developing roller main pole
adjustment plate in the rear side of the developing unit, and
move the adjustment plate in the arrow direction to adjust.
adjustment plate in the rear side of the developing unit, and
move the adjustment plate in the arrow direction to adjust.
Repeat procedures 3) - 6) until the developing roller main pole
position comes to the specified range.
position comes to the specified range.
7)
After completion of the adjustment of the developing roller
main pole position, fix the developing roller main pole adjust-
ment plate with the fixing screw.
main pole position, fix the developing roller main pole adjust-
ment plate with the fixing screw.
A
2
㨪3mm
46.4 + 0.5mm
A
46.4+ 0.5mm
MX-7500N ADJUSTMENTS AND SETTINGS 5 – 5
1-C
Toner density control reference value
setting
setting
This adjustment must be performed in the following cases:
* When developer is replaced.
CAUTION: Be sure to execute this adjustment only when developer
is replaced. Never execute it in the other cases.
CAUTION: Make sure Toner cartridges are not installed in the
machine.
CAUTION: When replacing developer, always replace all the three
colors of Yellow, Magenta, and Cyan.
If only one color is replaced, color balance may be
adversely affected. Black developer can be replaced
individually.
adversely affected. Black developer can be replaced
individually.
CAUTION: When not replacing the developer, do not execute
SIM25-2.
CAUTION: During execution of this adjustment, do not insert the
toner cartridge.
CAUTION: When SIM25-2 is executed with a toner cartridge
inserted, "Toner Check" is displayed to disable the exe-
cution button. In this case, remove the toner cartridge
and execute SIM25-2 again.
cution button. In this case, remove the toner cartridge
and execute SIM25-2 again.
1)
With the front cabinet open, enter SIM25-2.
2)
Close the front cabinet.
3)
Select a developing unit to be adjusted.
4)
When [EXECUTE] key is pressed, it is highlighted. The devel-
oping roller rotates, and the toner density sensor detects toner
density, and the output value is displayed.
oping roller rotates, and the toner density sensor detects toner
density, and the output value is displayed.
The above operation is executed for 3 minutes, and the aver-
age value of the toner density sensor detection level is set
(saved) as the reference toner density control value.
age value of the toner density sensor detection level is set
(saved) as the reference toner density control value.
When the reference toner density control adjustment operation
is completed, [EXECUTE] key returns to normal from highlight.
This makes known about whether the adjustment operation is
completed or not.
is completed, [EXECUTE] key returns to normal from highlight.
This makes known about whether the adjustment operation is
completed or not.
The above operation is executed each of the lower speed
mode and the middle speed mode, and the reference toner
density control value is set for each of them.
mode and the middle speed mode, and the reference toner
density control value is set for each of them.
CAUTION: If the operation is interrupted within 3 minutes, the
adjustment result is not reflected.
When [EXECUTE] key is pressed during rotation, the
operation is stopped and [EXECUTE] key returns to the
normal display.
operation is stopped and [EXECUTE] key returns to the
normal display.
If [EE-EU], [EE-EL], or [EE-EG] is displayed, setting of
the reference toner density control value is not com-
pleted normally.
the reference toner density control value is not com-
pleted normally.
Error
display
Error name
Detail of error
EE-EL
EL abnormality
Sensor output level: 0.99V or below. If not,
Control voltage: 8.0V or above.
Control voltage: 8.0V or above.
EE-EU
EU abnormality
Sensor output level: 2.28V or above. If not,
Control voltage: 2.0V or below.
Control voltage: 2.0V or below.
EE-EC
EC abnormality
Sensor output level: other than 1.65V +/-
0.04V
0.04V
EXECUTE
Adjustment completed
EXECUTE
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