Note For Copy Density Adjustment; Necessary Tool For Copy Density Adjustment; Copy Density Adjustment Timing; Features Of Copy Density Adjustment - Olivetti d-Copia 12 Service Manual

2) Execute SIM 50 – 10 to select the print center offset
(cassette 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 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.
5.3 Copy density adjustment

5.3.1 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.
5-8

5.3.2 Note for copy density adjustment

5.3.2.1 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.
5.3.3 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

5.3.4 Features of copy density adjustment

For the copy density adjustment, the image data shift function
provided in the image process LSI is used.
List of the adjustment modes.
Auto Mode
Manual Mode
Photo Mode
Manual T/S
T/S Auto mode
Service Manual
Brightness 1 step only
Brightness 5 steps. Adjustment of
only the center brightness is made.
Brightness 5 steps. Adjustment of
only the center brightness is made.
Brightness 5 steps. Adjustment
of only the mode
center brightness is made.
Brightness 1 step only
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