Original Exposure And Feed System; When Replacing The Cis Unit; When Replacing The Copyboard Glass - Canon imageRUNNER 1750 Series Service Manual

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Adjustment > Adjustment when Replacing the Parts > Original Exposure and Feed System > When Replacing the Copyboard Glass
Adjustment when Replacing the Parts

Original Exposure and Feed System

■ When Replacing the CIS Unit

Perform the following operation after replacing the CIS Unit.
● CIS gain and offset correction
1) Enter service mode.
SCAN > READER > FUNCTION > CCD > CCD-ADJ
2) Press "OK".
After this operation, output correction of the Contact Image Sensor is automatically
performed to set the parameter.
3) After auto adjustment is completed, OK is displayed.
(It will take approx. 15 seconds for this adjustment. During that time, display on the
Operation Panel will not be changed.)
● DF white level adjustment (book mode scan/stream reading scan)
1) Place a sheet of paper which is normally used by the user on the Copyboard Glass,
and execute the following: service mode > SCAN > READER > FUNCTION > CCD >
DFWLVL1.
The white level during BOOK mode is read (checking the transmission of the glass for
BOOK mode).
2) Place a sheet of paper which is normally used by the user on the ADF, and execute the
following: service mode > SCAN > READER > FUNCTION > CCD > DF-WLVL2.
The white level during DF mode (stream reading) is read (checking the transmission of the
glass for stream reading) (reading both sides of the chart).
3) Place a sheet of paper which is normally used by the user on the Copyboard Glass, and
execute the following: service mode > SCAN > READER > FUNCTION > CCD > DF-
WLVL3.
The white level during BOOK mode is read (checking the transmission of the glass for
BOOK mode).
4) Place a sheet of paper which is normally used by the user on the ADF, and execute the
following: service mode > SCAN > READER > FUNCTION > CCD > DF-WLVL4.
The white level during DF mode (stream reading) is read (checking the transmission of the
glass for stream reading) (reading both sides of the chart).
5 Adjustment > Adjustment when Replacing the Parts > Original Exposure and Feed System > When Replacing the Copyboard Glass

■ When Replacing the Copyboard Glass

Execute the following in the service mode.
CAUTION:
Be sure to execute the White Plate data adjustment before the DF while level
adjustment.
W-PLT-X
W-PLT-Y
1. Enter the value (see the figure above) indicated on the Copyboard Glass in the following
service mode.
SCAN > READER > ADJUST > CCD > W-PLT-X/Y/Z (entering the standard White Plate
data)
2. Follow the following steps to execute the service mode.
SCAN > READER > FUNCTION > CCD > DF-WLVL1/2/3/4 (adjusting the DF white level)
1) Place a sheet of paper which is normally used by the user on the Copyboard Glass, and
execute the following: service mode > SCAN > READER > FUNCTION > CCD > DF-
WLVL1.
The white level during BOOK mode is read (checking the transmission of the glass for
BOOK mode).
2) Place a sheet of paper which is normally used by the user on the ADF, and execute the
following: service mode > SCAN > READER > FUNCTION > CCD > DF-WLVL2.
The white level during DF mode (stream reading) is read (checking the transmission of the
glass for stream reading) (reading both sides of the chart).
3) Place a sheet of paper which is normally used by the user on the Copyboard Glass, and
execute the following: service mode > SCAN > READER > FUNCTION > CCD > DF-
WLVL3.
The white level during BOOK mode is read (checking the transmission of the glass for
BOOK mode).
4) Place a sheet of paper which is normally used by the user on the ADF, and execute the
following: service mode > SCAN > READER > FUNCTION > CCD > DF-WLVL4.
The white level during DF mode (stream reading) is read (checking the transmission of the
glass for stream reading) (reading both sides of the chart).
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W-PLT-Z
F-5-4
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