Image Density Sensor Adjustment; Image Density Sensor Calibration - Sharp MX-1810U Service Manual

ADJ 3
Image density sensor
adjustment
Before executing this adjustment, check to confirm the following
items.
* Check to confirm that the color image density sensor (image reg-
istration sensor F) and the black image density sensor (image
registration sensor R) 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.
3-A

Image density sensor calibration

There are some parts variations in the image density sensor sec-
tion. Therefore, the absolute image density detection level differs in
each machine. To correct this, calibration is executed.
This adjustment must be performed in the following cases:
* When the color image density sensor (image registration sensor
F) is replaced.
* When the image registration sensor unit is replace.
* U2 trouble has occurred.
* The PCU PWB has been replaced.
* The EEPROM of the PCU PWB has been replaced.
* The image density sensor and the standard reflection plate are
cleaned.
Perform the color image density sensor (image registration sensor
F) calibration in one of the following methods.
Method 1
Color image density sensor (Image registration sensor F) calibra-
tion (SIM44-61)
When the image density sensor unit is replaced, perform the
adjustment by this procedure.
When the registration sensor unit is replaced, the calibration value
is set manually with this method. The calibration jig is not required.
Method 2
Color image density sensor (Image registration sensor F) calibra-
tion (SIM44-13)
When the color image density sensor (image registration sensor F)
is solely replaced, be sure to perform the adjustment by this proce-
dure.
A calibration jig is required for this procedure.
The adjustment by this method must be performed in the following
cases:
• The SIM44-2 PCS_CL LED ADJ value is increased by aging and
dirt of the image density sensor and the standard reflection plate.
• When the density of an output image is decreased and the differ-
ence between the SIM44-2 PCS_CL LED ADJ value and the
SIM44-13 PCS_CL LED ADJ value is 30 or more, the image den-
sity sensor, the registration sensor, and the standard reflection
plate may be dirtied.
In this case, clean the image density sensor, the registration sen-
sor, and the standard reflection plate with dry cloth, and perform
calibration with SIM44-13 by using the calibration tool (UKOG-
0318FCZZ).
MX-3610N ADJUSTMENTS AND SETTINGS 4 – 10
a. Procedure by calibration (SIM44-61) of the color image
density sensor (image registration sensor F)
1) Enter the SIM44-61 mode.
2) Select an adjustment item.
Item/Display
A PCS_CL CARB Calibration plate sensor
OUT value
B PCS_CL LED ADJ Color sensor light emitting
quantity adjustment value
3) Enter the adjustment value with 10 key.
As the adjustment value, enter the value on the label attached
to the slot section of the toner cartridge (BK) of the sensor unit.
4) Press [OK] key.
Setting Default
Content
range value
1 - 255 108
1 - 255 21