When Replacing The Adf Reading Glass; Removing The Adf Unit; Procedure - Canon imageRUNNER 1750 Series Service Manual

4
Disassembly/Assembly > Original Exposure/Feed System > Removing the ADF Unit > Procedure

■ When Replacing the ADF Reading Glass

1. 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).
NOTE:
Be sure that size of a paper to be used in the foregoing steps is the one that the ADF
can be read.
4 Disassembly/Assembly > Original Exposure/Feed System > Removing the ADF Unit > Procedure

Removing the ADF Unit

■ Procedure

1) Remove the Reader Controller Cover [1].
• 2 Claws [2]
x2
[2]
2) Remove the 5 connectors [1] and the Grounding Wire [2] of the ADF Harness.
• 1 Screw [3]
[2]
x5
[3] [1]
4-43
[1]
[2]
F-4-68
[1]
F-4-69
4-43