Canon iR C6800 Series Service Manual page 840

Chapter 12
b. service label settings (label attached behind reader
unit front cover)
b 1 image read start position adjustment (x direction;
for fixed reading)
COPIER>ADJUST>ADJ XY>ADJ X
b 2 image read start position adjustment (Y direction;
fixed reading)
COPIER>ADJUST>ADJ XY>ADJ Y
b 3 shading position adjustment (for fixed reading)
COPIER>ADJUST>ADJ XY>ADJ S
b 4 feeder mode main scanning position adjustment
COPIER>ADJUST>ADJ XY>ADJ Y DF
b 5 ADF stream reading CCD read position
adjustment
COPIER>ADJUST>ADJ XY>STRD POS
b 6 CCD unit dependent RB/GB sub scanning
direction color displacement correction value
COPIER>ADJUST>CCD>CCDU RG/GB
b 7 CCD unit dependent RG/GB sub scanning
direction color displacement value at shipment
COPIER>ADJUST>CCD>FCCDU RG/GB
b 8 auto gradation adjustment target value
COPIER>ADJUST>PASCAL>OFST P Y,M,C,K
2. ADF Related Adjustments
The machine uses the RAM on its reader
controller to hold ADF related service data; as such,
you must make the appropriate adjustments for the
ADF whenever you have replaced the reader
controller or initialized the RAM.
12-22
1) Enter the settings indicated on the P PRINT
printout you have previously generated for the
following items:
a. original stop position adjustment
FEEDER>ADJSUT>DOCST
b. original feed speed (magnification) adjustment
FEEDER>ADUST>LA SPEED
2) Make adjustments using the following items:
a. ADF sensor sensitivity adjustment
FEEDER>FUNCTION>SENS INT
b. tray width adjustment
AB system: FEEDER>FUNCTION>TRY A4 and
FEEDER>FUNCTION>TRY A5R
inch system: FEEDER>FUNCTION>TRY LTR
and FEEDER>FUNCTION>TRY LTRR
c. white level adjustment
COPIER>FUNCTION>CCD>DF WLVL1
COPIER>FUNCTION>CCD>DF WLVL2
When done, put the P PRINT printout [1] you have
previously generated in the service book, disposing of
the older printout, if any.
[1]
F-12-27