Adj M5 Paper Skew Adjustment; Adj M6 Image Density Sensor Adjustment - Sharp AR-C150 Service Manual

NOTE: Do not press the [EXECUTE] key in SIM 8-6, otherwise the
photoconductor may be damaged.
The AR-C250/C160/C270 is provided with the adjustment of the
transfer voltage with SIM 44-30 from the beginning of production, and
the AR-C100/C150 in the middle of production.
ADJ M5
Paper skew adjustment
This adjustment must be performed in the following cases:
•
When the resist roller section is disassembled.
1) Enter the SIM 64-1 mode.
Select the black print mode.
2) Set the items as shown below:
A: 5
B: 255
C: 1
D: 9
E: Select A3 (11 × 17) paper size.
3) Press the [EXECUTE] key.
The grid pattern is printed. Check that the print line in the paper
transport direction is in parallel with both edges.
Paper edge
La
Paper
Paper transport direction
If the above condition is not satisfied, perform the following proce-
dure.
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.
Check that lines
Lb
are in parallel.
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.
7 – 5
Spec
128 or below
50 or below
102 ± 5
80 ± 15