Canon iR C6800 Series Service Manual page 211

<Initializing the RAM of the Reader Controller
Without Replacing the PCB>
Using the SST, upload the backup data of the reader
controller; after you have initialized the RAM,
download the backup data, thereby eliminating the
need for the following adjustment work.
1. Reader Unit Related Adjustment
1) Using the SST, download the latest system
software (R CON).
2) Make the following selections in service mode, and
press the OK key to initialize the RAM:
COPIER>FUNCTION>CLER>R CON. Then, turn
off and then on the main power.
3) Enter the following settings in service mode:
a. standard while plate white level data
COPIER>ADJUST>CCD W PLATE X,Y,Z
820686679349
*
W-PLT-X
W-PLT-Y
F-5-62
b. service mode label record (behind reader front
cover)
b 1 image read
(x direction; for fixed position reading)
COPIER>ADJUST>ADJ XY>ADJ X
b 2 image read
(Y direction: for fixed reading)
COPIER>ADJUST>ADJ XY>ADJ Y
b 3 shading position adjustment (for fixed reading)
*
W-PLT-Z
start position adjustment
start position adjustment
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 RG/GB sub scanning direction color
displacement correction
COPIER>ADJUST>CCD>CCDU RG/GB
b 7 factory default CD unit RG/GB sub scanning
color displacement correction
COPIER>ADJUST>CCD>FCCDU RG/GB
b 8 auto gradation correction target value
COPIER>ADJUST>PASCAL>OFFSET P Y,M,C,K
2. ADF Related Adjustment
The machine retains ADF related service data in
the RAM of its reader controller, calling for
adjustment of the ADF if you have initialized its
RAM.
1) In service mode, enter the settings indicated on the
P PRINT printout you have previously obtained:
a. original stop position adjustment
FEEDER>ADJUST>DOCST
b. original feed speed (magnification) adjustment
FEEDER>ADJUST>LA SPEED
2) Make the following adjustments using the
following service mode items:
a. ADF sensor sensitivity adjustment
FEEDER>FUNCTION>SENS IN
b. tray width adjustment
FEEDER>FUNCTION>TRY A4
FEEDER>FUNCTION>TRY A5R
FEEDER>FUNCTION>TRY LTR
FEEDER>FUNCTION>TRY LTRR
c. white level adjustment
COPIER>FUNCTION>CCD>DF WLVL1
COPIER>FUNCTION>CCD>DF WLVL2
Chapter 5
5-29