Read Sharp AL-1456 (serv.man11) Service Manual online
AL-1555 ADJUSTMENTS 9 - 4
3) Make a copy and check that the copied center line is properly
positioned.
The standard value is 0 ±2mm from the paper center.
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.
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 procedures.
• Since the document center offset is automatically adjusted by the
CCD which scan the reference lines (F/R) on the back of document
guide, there is no need to adjust manually.
guide, there is no need to adjust manually.
2. Copy density adjustment
A. Copy density adjustment timing
The copy density adjustment must be performed in the following 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.
B. 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.
C. Necessary tool for copy density adjustment
• One of the following test charts:
UKOG-0162FCZZ, UKOG-0089CSZZ, KODAK GRAY SCALE
• B4 (14" x 8 1/2") white paper
• The user program AE setting should be "3."
Test chart comparison table
D. Features of copy density adjustment
For the copy density adjustment, the image data shift function provided
in the image process LSI is used.
in the image process LSI is used.
List of the adjustment modes
E. Copy density adjustment procedure
Use SIM 46 - 01 to set the copy density for each copy mode.
For selection of modes, use the copy mode select key.
(1) Test chart (UKOG-0162FCZZ) setting
1) Place the test chart so that its edge is aligned with the A4 (Letter)
reference line on the document table. Then place a A4 (14" x
8 1/2") white paper on the test chart and close the document cover.
8 1/2") white paper on the test chart and close the document cover.
(Copy A)
(Copy B)
2.0mm or less
2.0mm or less
Copy image
Copy paper
folding line
folding line
Copy image
Copy paper
folding line
folding line
Shift
Shift
(Paper feed direction)
1
10
W
2
3
4
5
6
7
8
9
UKOG-
0162FCZZ
DENSITY
No.
0162FCZZ
DENSITY
No.
1
2
3
4
5
6
7
8
9
10
W
UKOG-
0089CSZZ
DENSITY
No.
0089CSZZ
DENSITY
No.
0.1
0.2
0.3
0.5 1.9
0
KODAK
GRAY
SCALE
GRAY
SCALE
1
2
3
4
19
A
Auto Mode
Brightness 1 step only
Manual Mode
Brightness 5 steps. Adjustment of only the center
brightness is made.
brightness is made.
Photo Mode
Brightness 5 steps. Adjustment of only the center
brightness is made.
brightness is made.
Manual T/S
mode
mode
Brightness 5 steps. Adjustment of only the center
brightness is made.
brightness is made.
T/S Auto mode
Brightness 1 step only
Test chart
White paper
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