Service manual

AL-2051 ADJUSTMENTS 9 - 7
2)
Print start position (Duplex back surface) ( RSPF ) 50-19
(PHOTO)
The size (length) of a document read from the RSPF is
detected, the image at the trailing edge of the first printing sur-
face is cut to make a void area. (The adjustment of void quan-
tity at the time when the cassette paper size is not recognized.)
The paper void quantity should be first adjusted before the image
cut trailing edge void quantity (RSPF) is adjusted.
(Adjustment procedure)
(1) Paper trailing edge void quantity
1) Preparing test chart (Draw a scale at the rear end of one side of
a sheet of A/4 white paper or letter paper)
2) Set the test chart on the document glass as shown below.
3) Using the user simulation [18], set the paper size of the first
cassette.
• Letter paper: 4
• A4 paper: 3
4) Execute SIM 50-19 to turn on the PRINT mode lamp and make
the printing mode in OC-D mode.
Make a copy of the test chart to check the void area of the scale
on the image.
Adjust the setting so that the void area is 4 - 5 mm. An increase in
1 of setting represents 0.1 mm in void area.
(2) Print start position (Duplex back surface)
1) Set the test chart so that the scale is positioned as shown
below.
2) Execute SIM 50-19 to turn on the SCAN mode lamp and make
the printing mode in the S-D mode.
3) Remove and reinsert the cassette.
Note: Make sure to carry out this step before making a copy dur-
ing this adjustment.
4) Make a copy and check the void area of the scale on the
image.
Adjust the setting so that the void area is 2 - 4 mm. An
increase of 1 in setting represents an increase of 0.1 mm in
void area.
Void position to be checked
5. RSPF scan position automatic
adjustment
Place a A4 paper (white chart) so that it covers the RSPF scan
glass and the OC glass together, and close the RSPF.
When simulation 53-08 is executed, the current adjustment value is
displayed as the initial display.
* Default is 1. Adjustment range is 1 – 99. Adjustment unit 1 =
about 0.127mm
* If the values are kept as the default values, RSPF scan is not per-
formed properly. The front area of the proper scan position may
be scanned.
In case of AUTO, press [START] key, and the mirror unit scans from
the home position to the RSPF scan position with the adjustment
value displayed. The SPF glass cover edge position is calculated
from the difference between the SPF glass cover edge and the OC
side document glass CCD output level. If the adjustment is normal,
the adjusted value is displayed. If abnormal, the error LED lights up
with the current set value displayed.
During the error LED is lighted, when [START] key is pressed again,
execution is performed again.
Operation
The operation is similar to simulation 46-01. (In MANUAL)
OK/ERR display in AUTO.
Document guide
The trailing edge has a scale
Table glass
The trailing edge void on the first printing surface
is shown above.
Paper
Void position to be check
Scale (S-D mode)
Mode
Display
item
Default LED
RSPF scan
position auto
adjustment
AUTO 1 COPY mode lamp
RSPF scan
position manual
adjustment
MANU 1 PRINT mode lamp
<When OK> <When ERR>
53-08 SPF AUTO
AUTO 100% ** OK
53-08 SPF AUTO
AUTO 100% ** ERR
6cm or more is required.