DOWNLOAD Sharp MX-5500N / MX-6200N / MX-7000N (serv.man45) Service Manual ↓ Size: 6.43 MB | Pages: 76 in PDF or view online for FREE

MX-7000N  ADJUSTMENTS  6 – 11

 

1)

Enter SIM44-2 mode.

2)

Press [EXECUTE] key.
The color image density sensor, the black image density sen-
sor, and the image registration sensor are automatically
adjusted.
After completion of the adjustment, the adjustment result is
displayed and [EXECUTE] key returns to the normal display.

If the adjustment is not completed normally, "ERROR" is dis-
played.
In that case, check the following sections for any abnormality.
If any abnormality is found, repair and adjust again.
If an error occurs, the adjustment result is not revised.
* Color image density sensor
* Black image density sensor
* Image registration sensor
* PCU PWB
* Transfer belt (dirt, scratch)
* Transfer belt cleaner

PROCON GAIN ADJUSTMENT

EXECUTE

PCS_CL LED ADJ

21

:

PCS_K LED ADJ

21

:

1/2

SIMULATION NO.44-02

TEST

CLOSE

PCS_K BELT DIF

0

:

PCS_CL DARK

0

:

PCS_K DARK

0

:

PCS_K GRND

0

:

PCS_K BELT MAX

0

:

PCS_K BELT MIN

0

:

REG_F LED ADJ

27

:

REG_R LED ADJ

27

:

REG_F DARK

0

:

REG_R DARK

0

:

REG_F GRND

0

:

REG_R GRND

0

:

REG_F BELT MAX

0

:

REG_F BELT MIN

0

:

REG_F BELT DIF

0

:

REG_R BELT MAX

0

:

REG_R BELT MIN

0

:

REG_R BELT DIF

0

:

PROCON

A

PCS_CL LED ADJ

Color image density sensor light emitting quantity adjustment value

1 – 255

21

B

PCS _K LED ADJ

Black image density sensor light emitting quantity adjustment value

1 – 255

21

C

PCS_CL DARK

Color image sensor dark voltage

0 – 255

0

D

PCS_K DARK

Black image density sensor dark voltage

0 – 255

0

E

PCS_K GRND

Belt base detection level when completion of Item B adjustment 

0 – 255

0

F

PCS_K BELT MAX

Belt base detection level (Max.)

0 – 255

0

G

PCS_K BELT MIN

Belt base detection level (Min.)

0 – 255

0

H

PCS_K BELT DIF

Belt base detection level difference (Item E, Item F)

0 – 255

0

REGIST

I

REG_F LED ADJ

Image registration sensor light emitting quantity adjustment value F

1 – 255

27

J

REG_R LED ADJ

Image registration sensor light emitting quantity adjustment value R

1 – 255

27

K

REG_F DARK

Image registration sensor dark voltage F

0 – 255

0

L

REG_R DARK

Image registration sensor dark voltage R

0 – 255

0

M

REG_F GRND

Belt base detection level when completion of Item I adjustment 

0 – 255

0

N

REG_R GRND

Belt base detection level when completion of Item J adjustment

0 – 256

0

O

REG_F BELTMAX

Belt base detection level (Max.) F

0 – 255

0

P

REG_F BELT MIN

Belt base detection level (Min.) F

0 – 255

0

Q

REG_F BELT DIF

Belt base detection level difference (Item O, Item P)

0 – 255

0

R

REG_R BELT MAX

Belt base detection level (Max.) R

0 – 255

0

S

REG_R BELT MIN

Belt base detection level (Min.) R

0 – 255

0

T

REG_R BELT DIF

Belt base detection level difference (Item R, Item S)

0 – 255

0

U

REG_F PATCH (K)

Patch detection level  F (K)

0 – 255

0

V

REG_F PATCH (C)

Patch detection level  F (C)

0 – 255

0

W

REG_F PATCH (M)

Patch detection level  F (M)

0 – 255

0

X

REG_F PATCH (Y)

Patch detection level  F (Y)

0 – 255

0

Y

REG_R PATCH (K)

Patch detection level  R (K)

0 – 255

0

Z

REG_R PATCH (C)

Patch detection level  R (C)

0 – 255

0

AA

REG_R PATCH (M)

Patch detection level  R (M)

0 – 255

0

AB

REG_R PATCH (Y)

Patch detection level  R (Y)

0 – 255

0

MX-7000N  ADJUSTMENTS  6 – 12

 

This adjustment must be executed in the following cases:
* When the LSU (writing) unit is replaced.
* When the LSU (writing) unit is removed from the main unit.
* When a color image registration mistake occurs.
* When the unit is installed or when the installing site is changed.

(Required depending on the cases.)

* When there is an uneven density area or a difference in color

balance in the main scanning direction (back and forth).

* When the OPC drum drive unit is replaced.
* When the primary transfer unit is replaced.
* When the color phase is not matched by the color balance

adjustment.

1)

Enter SIM61-4 mode.

2)

Select the paper feed tray with A3 (11 x 17) paper in it by
changing the value of set item B.

3)

Press [EXECUTE] key.
The check pattern is printed out.

4)

Check the printed black image for any skew (right angle).
Measure the right angle level by using the six cross patterns
printed in black.
There are following two methods of checking the black image
for any skew (right angle).
Method 1: Measure the length of the diagonal lines from the
cross point of the cross pattern. Check the difference in the
length of the diagonal lines for judgment of good or no good.
Method 2: Use the right angle sides of A3 or 11 x 8.5 paper for
judgment of good or no good.
NOTE:
IN the case of Method 2, the right angle of paper to be used
may not be exact. Be sure to check the right angle of paper to
be used in advance.

(Method 1)
a) Measure the length of the diagonal lines from the cross 

point of the outside cross pattern.

b) Calculate the difference between the measured lengths C 

and D of the diagonal lines.

c) Check to insure that the difference between C and D is in 

the following range.

C – D = 

± 0.8mm

If the difference between C and D is in the above range, 
there is no need to adjust.

(Method 2)
a) Fit the three cross points of the cross patterns in a row with 

the side of A3 or 11 x 8.5 paper for checking for any skew 
(right angle).

b) Measure the shortest distance between the cross pattern 

on the extended line of the vertical line and the paper side.
If the above distance is 0.5mm or less, there is no need to 
adjust.

If not, execute the following procedures.

5)

Open the front cover (lower).

6)

Loosen the LSU (writing) unit fixing screws (2 pcs.) and shift
the skew adjustment screw in the arrow direction to adjust the
LSU (writing) unit skew.
(When Method 1 is used to check the black image for any
skew (right angle) in procedure 4)
When the lengths of the diagonal line are C > D, shift the
adjustment screw in the direction of Y.
When the lengths of the diagonal line are C < D, shift the
adjustment screw in the direction of X.

A : 1

;

MULTICOUNT

B : 4

;

PAPER : CS3

A:

SIMULATION NO.61-04

LSU POSITION ADJUSTMENT (SELF PRINT)

XXX

1

999

OK

TEST

CLOSE

EXECUTE

EXECUTE

EXECUTE

A : 2

;

MULTICOUNT

B : 4

;

PAPER : CS3

A:

SIMULATION NO.61-04

LSU POSITION ADJUSTMENT (SELF PRINT)

XXX

1

999

OK

TEST

CLOSE

EXECUTE

or end of print

10-key

R

F

Diagonal line D

Diagonal line C

Direction A

Direction B

R

F

Comparison line

A3 or 11 x 8.5 paper

The cross patterns in a row

Reference line

0.5 mm or less

MX-7000N  ADJUSTMENTS  6 – 13

(When Method 2 is used to check the black image for any
skew (right angle) in procedure 4)
If the image is skewed in the arrow direction of A, shift the
adjustment screw to X direction. If the image is skewed in the
arrow direction of B, shift the adjustment screw to Y direction.

7)

Close the front cover (lower).

8)

Execute procedures 3) – 4).
(Repeat procedures 5) – 8) until a satisfactory result is
obtained.)

9)

If the adjustment result reaches the satisfactory level, tighten
the adjustment screw.
(The black image skew adjustment is completed with the
above.)

10) In the above black image skew adjustment, check the color

image skew pattern printed when completion of the adjust-
ment.

In each Y/M/C color print pattern printed separately in the front
frame direction and in the rear frame direction, note the same
print color pattern and check to confirm that the difference in
the highest density sections is within 

± 1 step.

(Compare the front and the rear frame positions of the same-
color print color patterns. All the highest density sections of all
the print color patterns may not be aligned on a line. Compare
only the same-color patterns.)
If the above condition is not satisfied, execute the procedures
below.

11) Turn the image skew adjustment screw of the target color to

adjust.

When each adjustment screw is turned, it clicks. Turn it by
5 – 6 clicks and the check pattern is changed by 1 step (1
dot size).
When the image skew pattern on the front frame side is
skewed in the arrow direction of A (to the smaller character)
from the rear frame side, turn the adjustment screw counter-
clockwise. When the image is skewed in the arrow direction of
B (to the larger character), turn the adjustment screw clock-
wise.

12) Print the check pattern.
13) Check the color image skew pattern.
Repeat procedures 11) – 13) until a satisfactory result is obtained.
The image skew adjustment (LSU unit) is executed by changing
the parallelism of the LSU unit scan laser beam for the OPC drum.

 

This adjustment must be executed in the following cases:

NOTE: This machine is provided with the manual photoconductor

phase adjustment function (SIM 44-31), which, however, is
rather difficult to perform. Therefore, it is advisable to use
SIM 50-22 to perform the automatic adjustment. 

* When the OPC drum is replaced.
* When the OPC drum is removed from the main unit.
* When the OPC drum drive section is disassembled.
* When the OPC drum drive unit is replaced.
* When U2 trouble occurs.
* When the PCU MAIN PWB is replaced.
* When EEPROM on the PCU MAIN PWB is replaced.

R

F

*A

*A: Rough adjustment pattern

*B

*B: Fine adjustment pattern

*B

Direction A

Direction B

Magenta

Cyan

Yellow

MX-7000N  ADJUSTMENTS  6 – 14

1)

Enter SIM50-22 mode.

2)

Press [ALL] key.
(The machine enters the OPC drum phase adjustment mode/
image registration adjustment (auto adjustment) mode, and
both adjustments are executed simultaneously in this mode.)
The OPC drum phase adjustment and the image registration
adjustment can be individually executed by [REGIST] key and
[DRUM POS] key. Since, however, the image registration
adjustment must be executed when the OPC drum phase
adjustment is completed, both adjustment are executed in this
adjustment simultaneously.

3)

Press [EXECUTE] key.
The OPC drum phase adjustment and the image registration
adjustment are executed automatically.

* After completion of the adjustment, the drum motor stops and

[EXECUTE] key returns to the normal display and the adjustment
result is displayed.
MAIN, SUB: Image regist adjustment value is displayed.

( ) is the difference from the previous adjustment value.
Example: This time 105.0, previous time 103.0: 105.0 (+2)

PHASE: OPC drum phase adjustment value is displayed.

( ) is the previous adjustment value.
Example: This time 90

°, previous time 45°: 3  (2)

* In case of an error, "ERROR" is displayed with the details.

 

This adjustment must be executed in the following cases:
* When the LSU (writing) unit is replaced.
* When U2 trouble occurs.
* When the PCU PWB is replaced.
* When EEPROM on the PCU PWB is replaced.
1)

Enter SIM50-10 mode.

2)

Set A4 (11 x 8.5) paper in the paper feed tray.

3)

Select the paper feed tray set in procedure 2) with the scroll
key.

4)

Press [EXECUTE] key.
The check pattern is printed.

Normal end

Abnormal end

SIMULATION NO.50-22

TEST

AUTO ADJUSTMENT OF REGISTRATION&DLUM POSITION

CLOSE

EXECUTE

NOW EXECUTING...

SIMULATION NO.50-22

TEST

AUTO ADJUSTMENT OF REGISTRATION&DLUM POSITION

CLOSE

EXECUTE

PRESS [EXECUTE] TO START

ERRORTONNER EMPTY 01

SIMULATION NO.50-22

TEST

AUTO ADJUSTMENT OF REGISTRATION&DLUM POSITION

EXECUTE

EXECUTE

MAIN F

MAIN R

SUB

C

105.0(+0.2)

110.0(-0.1)

103.0(+0.4)

M

100.0(+0.0)

99.0(-0.2)

99.0(+0.2)

Y

98.0(+0.3)

98.0(+0.1)

105(+0.0)

1/1

CLOSE

REGIST

DRUM POS

ALL

START POINT

AMP

CL

1(2)

0(1)

PHASE

M

1(2)

0.0(0.1)

K

1(2)

0(1)

C

1(2)

AMP

0.0(0.1)

Y

0.0(0.1)

A : 100

;

BK-MAG

B : 50

;

MFT

C : 50

;

CS1

D : 50

;

CS2

A:

SIMULATION NO.50-10

PAPER CENTER OFFSET SETUP

XXX

XXX

60

140

OK

TEST

CLOSE

E : 50

;

CS3

F : 50

;

CS4

G : 50

;

LCC

H : 50

;

ADU

I :

1

;

MULTICOUNT

J :

2

;

PAPER : CS1

K :

1

;

DUPLEX : NO

EXECUTE

A : 50

;

BK-MAG

B : 50

;

MFT

C : 50

;

CS1

D : 50

;

CS2

A:

SIMULATION NO.50-10

PAPER CENTER OFFSET SETUP

60

140

OK

TEST

CLOSE

E : 50

;

CS3

F : 50

;

CS4

G : 50

;

LCC

H : 50

;

ADU

I :

1

;

MULTICOUNT

J :

2

;

PAPER : CS1

K :

1

;

DUPLEX : NO

EXECUTE

end of print

EXECUTE

10-key

EXECUTE