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MX-7500N  ADJUSTMENTS AND SETTINGS  5 – 81

After execution of the above, perform procedures 1) - 4) to
check that the void area is within the specified range.
Though the lead edge void area adjustment value is proper, if
the lead edge void area is not within the specified range,
change the adjustment value of item (SUB-XXX) in SIM 50-10.
Refer to ADJ15-C.

Repeat the above procedures until a satisfactory result is obtained.
 

 

This adjustment must be performed in the following cases:
* When the LSU is replaced or removed.
* When a paper tray is replaced.
* When the paper tray section is disassembled.
* When ADJ15A Print image manual magnification ratio adjust-

ment (Main scanning direction) (Print engine) is performed.

* When the manual feed tray is replaced.
* When the manual feed tray is disassembled.
* When the duplex mode paper transport section is disassembled.
* When the registration roller section is disassembled.
* U2 trouble has occurred.
* The PCU PWB has been replaced.
* The EEPROM of the PCU PWB has been replaced.

NOTE: Before execution of this adjustment, check to insure the fol-

lowing item.

* The print image manual magnification ration adjustment

(ADJ15A) (main scanning direction) (Print engine) has been
properly adjusted.

Heavy paper A: Heavy paper 1 - 2, Embossed paper, Label sheet,
Tab sheet, Glossy paper
Heavy paper B: Heavy paper 3 - 4

Print off 
center 
adjust-
ment

BK-MAG

Main scan print 
magnification ratio

60 - 140

100

MAIN-MFT

(Print off center) manual 
feed adjustment value

1 - 99

50

MAIN-CS1

(Print off center) tray 1 
adjustment value

1 - 99

50

MAIN-CS2

(Print off center) tray 2 
adjustment value

1 - 99

50

MAIN-CS3

(Print off center) tray 3 
adjustment value

1 - 99

50

MAIN-CS4

(Print off center) tray 4 
adjustment value

1 - 99

50

MAIN-LCC

(Print off center) LCC 
adjustment value

1 - 99

50

MAIN-LCT1

Print off center 
adjustment value (LCT1)

1 - 99

50

MAIN-LCT2

Print off center 
adjustment value (LCT2)

1 - 99

50

MAIN-LCT-
MFT

Print off center 
adjustment value 
(LCT_manual feed)

1 - 99

50

MAIN-ADU

(Print off center) ADU 
adjustment value

1 - 99

50

RRCB-MFT

(Lead edge adjustment: 
registration motor ON 
timing) manual feed 
adjustment value

1 - 99

50

RRCB-
CS12

(Lead edge adjustment: 
registration motor ON 
timing) tray 1 adjustment 
value

1 - 99

50

RRCB-
CS34

(Lead edge adjustment: 
registration motor ON 
timing) desk adjustment 
value

1 - 99

50

Print off 
center 
adjust-
ment

RRCB-ADU

(Lead edge adjustment: 
registration motor ON 
timing) ADU adjustment 
value

1 - 99

50

RRCB-LC

(Lead edge adjustment: 
registration motor ON 
timing) LCC/LCT 
adjustment value

1 - 99

50

RRCB-
ADU-HV-A

(Lead edge adjustment: 
registration motor ON 
timing) ADU adjustment 
value (Heavy paper A)

1 - 99

50

RRCB-CS-
HV-A

(Lead edge adjustment: 
registration motor ON 
timing) main unit tray 
adjustment value (Heavy 
paper A)

1 - 99

50

RRCB-CS-
HV-OHP

(Lead edge adjustment: 
registration motor ON 
timing) main unit tray 
adjustment value (OHP)

1 - 99

50

RRCB-LC-
HV-A

(Lead edge adjustment: 
registration motor ON 
timing) LCC/LCT 
adjustment value (Heavy 
paper A)

1 - 99

50

RRCB-LC-
HV-B

(Lead edge adjustment: 
registration motor ON 
timing) LCC/LCT 
adjustment value (Heavy 
paper B)

1 - 99

50

RRCB-MFT-
HV-A

(Lead edge adjustment: 
registration motor ON 
timing) manual feed tray 
adjustment value (Heavy 
paper A)

1 - 99

50

RRCB-MFT-
HV-B

(Lead edge adjustment: 
registration motor ON 
timing) manual feed tray 
adjustment value (Heavy 
paper B)

1 - 99

50

RRCB-MFT-
HV-OHP

(Lead edge adjustment: 
registration motor ON 
timing) manual feed tray 
adjustment value (OHP)

1 - 99

50

RRCB-MFT-
HV-ENV

(Lead edge adjustment: 
registration motor ON 
timing) manual feed tray 
adjustment value 
(Envelope)

1 - 99

50

MULTI 
COUNT

Number of print

1 - 999

1

PAPER

Tray selection

1 - 9

2

DUPLEX

Duplex print selection

0 - 1

1

MX-7500N  ADJUSTMENTS AND SETTINGS  5 – 82

1) Enter SIM 50-10 mode.

2) Select the target paper feed tray (MAIN-XX) with the scroll key.

3) Set A4 (11" x 8.5") paper in the paper feed tray selected in pro-

cedure 2).

4) Press [EXECUTE] key.

The adjustment pattern is printed.

5) Check that the adjustment pattern image is printed in the cor-

rect position.
Measure the dimension of the lead edge void area in the front
and the rear frame direction of the adjustment pattern, and
check that all the following conditions are satisfied.

RV: REAR VOID AREA
FV: FRONT VOID AREA

RV + FV ≤ 4.0mm
RV = 2.0 +/- 2.0mm
FV = 2.0 +/- 2.0mm

HV: Lead edge void

HV = DENA adjustment value / 10 +/- 1.0mm

If the above requirement is not met, do the following steps.

6)

Change the adjustment value.
Enter the adjustment value and press the [OK] key or the
[EXECUTE] key.
When [EXECUTE] key is pressed, the adjustment pattern is
printed.
When the MAIN adjustment value is increased, the image FV
of 5) is increased and the RV is decreased.
When the SUB adjustment value is increased, the image HV of
5) is increased and the rear edge void is decreased.
When the set value is changed by 1, the shift distance is
changed by about 0.1mm.
Repeat procedures 3) - 6) until the conditions of procedure 5)
are satisfied.
In case a satisfactory result cannot be obtained by repeating
the above procedures, perform the following procedure.

7)

In the case of tandem tray
Loosen two red screws, and adjust the position of the paper
feed guide.

NO

Not select

1

EXECUTE 

End of print

 

EXECUTE

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RV
2.0mm

HV
(Lead edge void)

(Rear edge void)

2.0mm

FV
2.0mm

2.0mm

MX-7500N  ADJUSTMENTS AND SETTINGS  5 – 83

8) In the case of paper feed tray 3/4

Loosen the paper feed tray off-center adjustment screws (2
pcs.) at the center section of the lift plate of the paper feed tray,
and change the gear unit position in the front/rear frame direc-
tion. Repeat the adjustment procedures from 4).

NOTE:
Normally if the adjustment is executed by ADJ3 (automatic adjust-
ment), there is no need to execute this adjustment.
Only when the manual adjustment is required, execute this adjust-
ment.
In other words, this manual adjustment is executed when a satis-
factory result is not obtained from the automatic adjustment
(ADJ3).
The adjustment item (SUB-XXX-HV-XXX) is used to make the fine
adjustment of heavy paper/OHP/envelopes for the adjustment item
(SUB-XXX) of each paper feed tray.

 

NOTE:
Normally if the adjustment is executed by ADJ3 (automatic adjust-
ment), there is no need to execute this adjustment.
Only when the manual adjustment is required, execute this adjust-
ment.
In other words, this manual adjustment is executed when a satis-
factory result is not obtained from the automatic adjustment
(ADJ3).
 

 

CAUTION: If the default adjustment value of the scan image magni-

fication ration adjustment (main scanning direction) of
SIM 48-1, copy image quality may be degraded. There-
fore, this adjustment must be executed only when there
is a special necessity.

This adjustment must be performed in the following cases:
* When the copy magnification ratio in the copy image main scan-

ning direction is not properly adjusted.

* When the scanner motor is replaced.
* U2 trouble has occurred.
* When the scanner control PWB is replaced.
* When the EEPROM of the scanner control PWB is replaced.
Before this adjustment, the focus adjustment (CCD unit installing
position adjustment) must have been completed.
1)

Place a scale on the document table as shown in the figure
below.

2)

Enter the SIM 48-1 mode.

 

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MX-7500N  ADJUSTMENTS AND SETTINGS  5 – 84

3) Make a normal copy and obtain the copy magnification ratio.

Press [CLOSE] key to shift from the simulation mode to the
copy mode, and make a copy.

4) Check that the copy magnification ratio is within the specified

range (100 +/- 1.0%).
If the copy magnification ratio is within the specified range (100
+/- 1.0%), the adjustment is completed. If the copy magnifica-
tion ratio is not within the specified range, perform the follow-
ing procedure.

5) Change the CCD (MAIN) adjustment value of Simulation 48-1.

When the adjustment value is increased, the copy magnifica-
tion ratio is increased.
When the adjustment value is changed by 1, the copy magnifi-
cation ratio is changed by about 0.02%.
Repeat the procedures 3) - 5) until the copy magnification ratio
is within the specified range (100 +/- 1.0%).

 

This adjustment must be performed in the following cases:
* When the copy magnification ratio in the copy image sub scan-

ning direction is not properly adjusted.

* When the scanner motor is replaced.
* U2 trouble has occurred.
* When the scanner control PWB is replaced.
* When the EEPROM of the scanner control PWB is replaced.
1) Place a scale on the document table as shown in the figure

below.

2) Enter the SIM 48-1 mode.

3)

Make a normal copy and obtain the copy magnification ratio.
Go to the copy mode, and make a copy.

4)

Check that the copy magnification ratio is within the specified
range (100 +/- 1.0%).
If the copy magnification ratio is within the specified range (100
+/- 1.0%), the adjustment is completed. If the copy magnifica-
tion ratio is not within the specified range, perform the follow-
ing procedure.

5)

Change the CCD (SUB) adjustment value of Simulation 48-1.
When the adjustment value is increased, the copy magnifica-
tion ratio in the sub scanning direction is increased.
When the adjustment value is changed by 1, the copy magnifi-
cation ratio is changed by about 0.1%.

Repeat the procedures 3) - 5) until the copy magnification ratio is
within the specified range (100 +/- 1.0%).

 

This adjustment must be performed in the following cases:
* When the scan control PWB is replaced.
* When the EEPROM on the scan control PWB is replaced.
* When U2 trouble occurs.
* When the copy magnification ratio of the DSPF mode copy

image in the main scanning direction is not proper.

* When the DSPF is disassembled.

1)

Place the duplex adjustment chart shown below on the docu-
ment tray of the DSPF.
The adjustment chart is prepared by the following procedures.
Use A4 (11" x 8.5") paper, and put marks on both sides and
both surfaces of the paper at 10mm from each edge.

 

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10

20

90

100

110

10

20

90

100

110

10

20

90

100

110

(Example 1)
Copy A
(Shorter than
the original)

(Example 2)
Copy B
(Longer than
the original)

Scale
(Original)

Copy magnifi-
cation ratio

(Original dimension - Copy dimension)

Original dimension

100%

A4 size

(Both the front surface 

and the back surface)

10mm

10mm

Paper pass direction