Sharp AR-121E, Руководство по обслуживанию

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4) If the measurement value is out of the specified range,
change the set value and repeat the adjustment procedure.
The default value is 50.
3. Center offset adjustment
1) Set the self-made test chart for the center position adjust-
ment so that its center line is aligned with the center mark
of the document guide.
●
Test chart for the center position adjustment
Draw a line at the center of A4 or 8 1/2
″ ×
11
″
paper in
the paper transport direction.
2) Execute SIM 50 – 10 to select the print center offset (cas-
sette paper feed) adjustment mode.
The set adjustment value is displayed on the copy quantity
display.
3) Make a copy and check that the copied center line is
properly positioned.
The standard value is 0
±
2mm from the paper center.
4) If the measured value is out of the specified range, change
the set value and repeat the adjustment procedure.
When the set value is increased by 1, the copy image is
shifted by 0.1mm toward the rear frame.
●
For the manual paper feed, change the manual paper
feed adjustment mode and perform the similar proce-
dures.
●
Since the document center offset is automatically ad-
justed by the CCD which scan the reference lines (F/R)
on the back of document guide, there is no need to ad-
just manually.
2. Copy density adjustment
(1) Copy density adjustment timing
The copy density adjustment must be performed in the follow-
ing cases:
●
When maintenance is performed.
●
When the developing bias/grid bias voltage is adjusted.
●
When the optical section is cleaned.
●
When a part in the optical section is replaced.
●
When the optical section is disassembled.
●
When the OPC drum is replaced.
●
When the main control PWB is replaced.
●
When the EEPROM on the main control PWB is replaced.
●
When the memory trouble (U2) occurs.
(2) Note for copy density adjustment
1) Arrangement before execution of the copy density
adjustment
●
Clean the optical section.
●
Clean or replace the charger wire.
●
Check that the voltage at the high voltage section and the
developing bias voltage are in the specified range.
(3) Necessary tool for copy density adjustment
●
One of the following test charts:
UKOG-0162FCZZ, UKOG-0089CSZZ, KODAK GRAY
SCALE
●
B4 (14
″ ×
8 1/2
″
) white paper
●
The user program AE setting should be “3.”
Test chart comparison table
UKOG-
0162FCZZ
DENSITY No.
1 2 3 4 5 6 7 8 9 10 W
UKOG-
0089CSZZ
DENSITY No.
0.1 0.2 0.3 0.5 1.9 0
KODAK
GRAY
SCALE
1 2 3 4 19 A
Document guide
Center
Copy paper
(A4 or 8 1/2
″ ×
11
″
)
(Copy A)
(Copy B)
2.0mm or less
2.0mm or less
Copy image
Copy paper
folding line
Copy image
Copy paper
folding line
Shift
Shift
(Paper feed direction)
1 10 W 2 3 4 5 6 7 8 9
AL-1000/1010
9-8