AL-1661CS ADJUSTMENTS 9 - 6
B. Adjusting trailing edge void in duplex copy mode
This is the adjustment of the first surface printing mode (rear end void)
in duplex copying.
In a duplex copying operation, the paper is delivered starting from the
rear end of the first printing surface. It is therefore necessary to make a
void area at the rear end on the first printing surface to prevent paper
jam at the fusing part.
There are two adjustment modes:
1) Image cut rear end void quantity (R-SPF) 50-19 (SCAN mode
lamp)
The size (length) of a document read from the R-SPF is detected,
the image at the trailing edge of the first printing surface is cut to
make a void area. (The adjustment of void quantity at the time
when the cassette paper size is not recognized.)
2) Paper trailing edge void quantity 50-19 (PRINT mode lamp)
This adjustment is made when the cassette paper size is
recognized. The trailing edge void quantity can be adjusted by
changing the trailing edge image laser OFF timing.
The paper void quantity should be first adjusted before the image cut
trailing edge void quantity (R-SPF) is adjusted.
The adjustment modes can be selected by pressing [
←
/
→
] key.
(Adjustment range; 1 – 99)
Enter the adjustment value and press [START] key to save the set
value and make a copy. (The paper information is cleared for every
copy.)
When the set value is increased by 1, the void amount is increased by
about 0.1mm.
* The initial value of duplex setting is 2to2.
(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) Execute test command 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) Image cut trailing edge void quantity (R-SPF)
1) Set the test chart so that the scale is positioned as shown below.
2) Execute test command 50-19 to turn on the SCAN mode lamp(on
the operation panel) and make the printing mode in the D-D mode.
3) Remove and reinsert the cassette.
Note: Make sure to carry out this step before making a copy during
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.
l Void position to be checked
Mode
Display
item
Default
LED
Paper rear edge void
amount
DEN-B
50
PRINT mode lamp
Print start position (Duplex
back surface)
RRC-D
50
SCAN mode lamp
2nd printing surface where scale is printed (lower side)
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 (D-D mode)
Summary of Contents for AL-1661CS
Page 201: ...AL 1661CS CIRCUIT DIAGRAM 13 40 6 7 8 9 10 11 12 6 7 8 9 10 11 12 A B C D E F G H 1 1 ...
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