Sharp AR-C150 Service Manual page 17

4) Loosen the resist roller fixing screw, and change the resist roller
angle.
The standard position is at the center.
Repeat procedures 3) – 4) until the condition of procedure 3) is satis-
fied.
ADJ M6
Image density sensor adjustment
ADJ 1 Image density sensor calibration
This adjustment must be performed in the following cases:
•
When the image density sensor is replaced.
•
When the transfer belt is replaced.
•
When a U2 trouble occurs.
•
When the PCU main PWB is replaced.
•
When the EEPROM of the PCU main PWB is replaced.
The process control sensor gain adjustment means: The detection
level differs between machines due to variations in density detection
sensors and parts. To prevent against this, attach a seal of a certain
density on the belt to calibrate the sensor.
1) With the power OFF, open the right cover of the machine.
2) Pull out the transfer unit, and attach the adjustment sheet (UKOG-
0281FCZZ) to the belt.
(The attachment position is between the two separation pawls of
the fusing unit.)
3) Return the transfer unit. With the front cover open, turn on the
power.
4) Enter the SIM 44-13 mode.
5) Close the front cover.
6) Press the [EXECUTE] key.
The adjustment is automatically performed. When the adjustment
is completed, the [EXECUTE] key returns to the normal display.
7) Check that the SIM 44-13 values are within the specifications.
Check content
PCLEDC (Sensor current in color calibration)
DARK ID (Color image density sensor dark
voltage)
P_PSI (Read value of calibration sheet)
P_CYI (Read value of calibration plate)
∗
When an error message is displayed, clean the sensor and the
calibration plate, and adjust again.
∗
If the above procedure cannot cancel the error, replace the
sensor and the calibration plate.
8) Turn off the power.
9) Pull out the transfer unit, and remove the adjustment sheet.
(The adjustment sheet is positioned in front of the cleaning blade
at the back of the unit as the transfer belt rotates.)
10) Return the transfer unit.
NOTE: If the motor drive power is turned on immediately after at-
taching the adjustment sheet to the transfer belt, the adjust-
ment sheet does not stop at the specified position and the
transfer belt keeps rotating.
As a result, the adjustment sheet may be damaged by the
transfer cleaning blade or the transfer cleaning blade may be
damaged by the adjustment sheet.
To prevent against this, be sure to observe the following.
1) Before entering the SIM 44-13 mode, open the right cover of
the machine to open the motor drive power line.
2) After completion of the adjustment, remove the adjustment
sheet from the transfer belt.
ADJ 2 Image density sensor sensing position
adjustment
This adjustment must be performed in the following cases:
•
When the image density sensor is replaced.
•
When the image density sensor section is replaced.
•
When a U2 trouble occurs.
•
When the PCU main PWB is replaced.
•
When the EEPROM of the PCU main PWB is replaced.
1) Enter the SIM 44-23 mode.
2) Press the [EXECUTE] key. The adjustment is automatically per-
formed, and the average data is displayed.
When the operation is completed, the [EXECUTE] key is high-
lighted.
In case of an abnormal end, "ERROR" is displayed.
7 – 6
AR-C150
Spec
128 or below
50 or below
102 ±5
80 ±15