Sharp AR-BC320 Service Manual page 112

Note:
There are two methods to adjust the color image density sensor;
one method uses the adjustment jig, and the other method does
not use it.
If there is no adjustment jig available, the simple adjustment
(SIM44-36) can be made, which may, however, result in insuffi-
cient adjustment accuracy depending on the machine condition.
If toner, the OPC drum, and the transfer belt are not new ones or
almost new ones, the simple adjustment is not recommended.
Even though the machine conditions are well, the adjustment by
use of the adjustmment jig gives a higher adjustment accuracy
than the adjustment without the adjustment jig (simple adjust-
ment).
Also note that SIM44-36 must not executed unnecessarily after
execution of the color image density sensor adjustment (adjust-
ment by the adjustment jig) with SIM44-13.
If SIM 44-36 is executed, the contents of the color image density
sensor adjustment (adjustment by the adjustment jig) with SIM44-
13 are erased, and the adjustment result of SIM44-36 is saved.
When the color image density sensor is adjusted with SIM44-13
and the black image density sensor is adjsuted with SIM 44-2, the
adjustment with SIM44-36 is not required.
To adjust the black image density sensor, the adjustment jig is not
required.
Before executing this adjustment, check the following items:
• Check that the color imagte density sensor is clean.
• Check that the image density sensor calibration plate is clean.
• Check that the transfer belt is free from scratches.
ADJ 2A Color image density sensor
adjustment
(adjustment by the adjustment jig)
1) Open the front cover of the machine.
2) Insert the color image density sensor adjustment jig
(CPLTM6305FC01) into the long hole in the transfer unit
frame, and close the left cabinet.
3) With the front cover of the machine open (with the cover open/
close switch OFF), turn on the power.
4) The Machine enters Sim 44-13 mode.
5) Close the front cover of the machine.
6) Press the [EXECUTE] key.
The adjustment is performed automatically. When the adjust-
ment is completed, the adjustment result is displayed and the
the [EXECUTE] key display returns to the original state.
Display
A PCS_C
CARB ADJ
B PCS_C
DARK
C PCS_C
LED ADJ
7) Remove the color image density sensor adjustment jig.
If the adjustment is not completed normally, "ERROR" is dis-
played.
In that case, check the following sections for no abnormality. If
there is any abnormality, repair the part and perform the adjust-
ment again. In case of an error, the adjustment result is not
revised.
• Image density sensor
• PCU PWB
• Transfer belt
Note:
The color image density sensor adjustment jig is available in the
following two forms:
• The jig metal plate with the calibration sheet attached to it
(CPLTM6305FC01)
• Calibration sheet (for replacement) (TLABZ4843FCZZ)
TLABZ4843FCZZ is the calibration sheet for replacement. When
the calibration sheet attached to CPLTM6305FC01 is dritied or
scratched too much to be used, replace only the calibration sheet
with a new one.
AR-BC320 SETTING AND ADJUSTMENTS 8 - 5
SIM 44-13
Min
Content
Value
Color image density 1
sensor LED current
adjustment target value
Color image density 0
sensor dark voltage level
Color image density 1
sensor current
adjustment value
Max Default
Value value
255 108
255 0
255 51