Image Density Sensor, Image Registration Sensor Adjustment; Color Image Density Sensor Calibration - Sharp MX-2300 G Service Manual

5
Image density sensor, image regis-
tration sensor adjustment
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.
5-A

Color image density sensor calibration

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.
UN LOCK
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)
5)
6)
7)
8)
9)
10) Close the front cabinet.
11) Press [EXECUTE] key.
MX-2300/2700 N/G ADJUSTMENTS 6 – 8
Open the right cover unit (secondary transfer unit section).
Open the process front cover, and pull out the primary transfer
belt unit.
Install the image density sensor calibration jig to the sensor
housing section.
Engage the projection (c) in the sensor housing groove, and
slide it to the rear frame side.
C
Turn on the power and enter SIM44-13 mode.
SIMULATION NO.44-13
TEST
PATCH SEAL ADJUSTMENT
PCS CL CARB OUT : xxx
PCS CL DARK : xxx
PCS CL LED ADJ : xxx
EXECUTE
or when the color sensor
adjustment is completed
SIMULATION NO.44-13
TEST
PATCH SEAL ADJUSTMENT
xxx
PCS CL CARB OUT :
xxx
PCS CL DARK :
xxx
PCS CL LED ADJ :
Close the right cover unit (secondary transfer unit section).
Install the waste toner bottle to the main unit.
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.
C
0
CLOSE
EXECUTE
1/1
EXECUTE
0
CLOSE
EXECUTE
1/1