MX-1800N (serv.man14). Section 6 - Adjustments - Sharp Copying Equipment Service Manual (repair manual). Page 8

MX-1800N  ADJUSTMENTS  6 – 8

 

There are some assembly variations in the image density sensor
section. Therefore, the absolute detection level differs in each
machine. To correct this, calibration is executed.
This adjustment must be executed in the following cases:
* When the image density sensor is replaced.
* When the image resist sensor is replaced.
* When U2 trouble occurs.
* When the PCU PWB is replaced.
* When EEPROM on the PCU PWB is replaced.
The targets of the adjustment are the color image density sensor,
the black image density sensor, and the image registration sensor.
There are following adjustment methods.
* Color image density sensor adjustment (Calibration with the

adjustment jig) SIM44-13

* Black image density sensor and the image registration sensor

adjustment SIM44-2

NOTE: Before executing this adjustment, check to confirm the fol-

lowing items.

* Check to confirm that the color image density sensor, the black

image density sensor, and the image registration sensor are
clean.

* Check to confirm that the image density sensor calibration plate

is clean.

* Check to confirm that the transfer belt is clean and free from

scratches.

 

1) Open the front cabinet of the main unit, and remove the waste

toner box.

2) Remove the primary transfer unit fixing screw.

3) Turn to the transfer belt tension release cam and release the

primary transfer belt tension.

NOTE: When the transfer belt tension of the primary transfer
unit is released manually, turn on the power again after com-
pletion of the work. (Power OFF-ON) This procedure initializes
the transfer roller to return it to the home position.

4)

Open the right cover unit (secondary transfer unit section).

5)

Open the process front cover, and pull out the primary transfer
belt unit.

6)

Install the image density sensor calibration jig (UKOG-
0318FCZZ) to the sensor housing section.
Engage the pawl (A) in the sensor housing groove, and slide it
to the rear frame side.

7)

Turn on the power and enter SIM44-13 mode.

8)

Close the right cover unit (secondary transfer unit section). 

9)

Install the waste toner bottle to the main unit.

10) Close the front cabinet.
11) Touch [EXECUTE] key.

Color image sensor calibration is automatically executed.
When the operation is completed, the adjustment result is dis-
played and [EXECUTE] key returns to the normal display.

EXECUTE

EXECUTE

0

SIMULATION㩷 NO.44-13

TEST

PATCH SEAL ADJUSTMENT

EXECUTE

xxx

:

PCS CL DARK

xxx

:

xxx

xxx

xxx

xxx

:

1/1

CLOSE

0

SIMULATION㩷 NO.44-13

TEST

PATCH SEAL ADJUSTMENT

EXECUTE

PCS CL CARB OUT :

PCS CL DARK

:

PCS CL LED ADJ

:

1/1

CLOSE

or when the color sensor

adjustment is completed

PCS CL CARB OUT

PCS CL LED ADJ