Service manual

AL-2030/2040CS/2050CS ADJUSTMENTS 9 - 8
6. SPF/RSPF mode sub scanning
direction magnification ratio
adjustment
Note: Before performing this adjustment, be sure to check that the
OC mode adjustment in copying has been completed.
1) Put a scale on the original table as shown below, and make a
normal copy (100%) on the front and the back surfaces to
make a test chart.
Note: Since the printed copy is used as a test chart, put the scale
in paralled with the edge lines.
2) Set the test chart on the SPF and make a copy in the normal
ratio (100%). (AL-2030/2040CS)
Set the test chart on the RSPF and make a duplex copy (D-D or
D-S) in the normal ratio (100%). (AL-2050CS)
3) Compare the scale image and the actual image.
If necessary, perform the following adjustment procedures.
4) Execute SIM 48-05.
5) The current sub scanning direction magnification ratio correc-
tion value is displayed in two digits on the display section.
6) Enter the set value and press the [START] key.
When adjusting the RSPF, use [2-SIDED COPY] key to select
single/duplex after entering the one page print mode, perform-
ing 2-page single copy.
∗ When there is no document in SPF/RSPF, copy is inhibited.
<Adjustment specification>
7. Automatic black level correction
a. Cases when the adjustment is required
1) When the main PWB is replaced.
2) When the EEPROM in the main PWB is replaced.
3) When "U2" trouble occurs.
4) When repairing or replacing the optical section.
b. Adjustment procedure
Used to acquire the black level target value used for the black level
adjustment of white balance.
When SIM 63-02 is executed, the current correction value is dis-
played in 3 digits of 12bit hexadecimal number.
Place the gray gradation chart (UKOG-0162FCZZ) used as the
correction document so that the density 10 (black side) comes on
the left side and that the chart is upside down at the center of the
plate left center.
When START key is pressed, the mirror base unit scans the chart
and calculates the correction value.
After completion of correction, the corrected value is displayed on
the display section.
∗ Default: 0
∗ If the value is set to the default, operation is made with 0x60.
AL-2050CS only
c. Operation
1) Initial display
2) [ENTER]/[START] key: Correction start
<During canceling - When [Clear]/[Clear All] key is pressed->
After canceling, the machine goes into the sub code entry standby
mode.
3) After execution
3) In case of an error
Mode
Display item
(AL-2050CS)
Default LED
Sub scan magnification
ratio adjustment on the
surface of SPF/RSPF
document
SIDE1 50 AE mode lamp
(AL-2030/
2040CS)
COPY mode lamp
(AL-2050CS)
Sub scan magnification
ratio adjustment on the
surface of RSPF
document (AL-2050CS
only)
SIDE2 50 PRINT mode lamp
Adjustment mode Spec value SIM Set value
Setting
range
Sub scanning
direction
magnification ratio
(SPF/RSPF mode)
At normal:
±1.0%
48-5 Add 1:
0.1% increase
Reduce 1:
0.1% decrease
1 – 99
63-02 BLACK LEVEL
0
63-02 BLACK LEVEL
EXECUTING...
THE JOB IS BEING
CANCELED.
63-02 BLACK LEVEL
*** OK
63-02 BLACK LEVEL
*** ERR
Chart back surface
10