Canon iR6570 series Service Manual page 599

Sub-item
DF-WLVL1/2
<LASER>
Sub-item
POWER
<DPC>
Sub-item
DPC
OFST
<CST>
Sub-item
C3-STMTR
C3-A4R
C4-STMTR
C4-A4R
COPIER > FUNCTION > CCD
Description
Use it to execute ADF white level adjustment (platen board scan/stream reading
scan)
Procedure
1) Place a sheet of paper (of the type most frequently used by the user) on the
platen board glass, and execute the following:
COPIER>FUNCTION>CCD>DF-WLVL1.
The white level for book mode is read (checking the degree of transmission of
the glass for book mode).
2) Place a sheet of paper often used by the user in the DF, and execute the
following: COPIER>FUNCTION>CCD>DF-WLVL2.
The white level for DF mode (stream reading) is read (checking the degree of
transmission of glass for stream reading; reading both sides of the chart).
face: computes DFTAR-R/G/B
back: computes DFTAR2-R/G/B
Caution:
Be sure to execute both of the foregoing 2 items at the same time.
T-16-34
COPIER > FUNCTION > LASER
Description
Use it to turn on the laser for laser power adjustment.
Procedure
1) Select the item to highlight, and press the OK key.
2) See that the laser goes on.
3) See that the laser goes off in about 30 sec. (To turn it off in the middle, press
the Stop key.)
T-16-35
COPIER > FUNCTION > DPC
Description
Use it to force the execution of potential control.
The machine is designed so that it will not perform potential control at
power-on (recovery mode) if the temperature of the fixing assembly is 70
deg C or higher. If you have replaced the photosensitive drum or the laser
unit, or if you have changed the drum potential setting, be sure to execute
this mode item.
Procedure
1) Select the item, and type in '1'; then, press the OK key.
2) Turn off and then on the main power switch.
3) See that the machine executes potential control and stops it automatically.
Use it to adjust the offset value of the potential sensor.
This mode item is part of the series of procedures you have to perform when
you have replaced the potential sensor unit. Be sure never to execute it on its
own.
Procedure
1) Select the item to highlight, and press the OK key.
2) See that the machine executes offset adjustment and stops it
automatically.
T-16-36
COPIER > FUNCTION > CST
Description
Use it to register the paper width basic value of the cassette 3/4.
STMTR width: 139.5 mm; A4R width: 210 mm
To make fine adjustments after registering a value, use the following:
ADJUST>CST-ADJ>C3-STMTR, C3-A4R, C4-STMTR, C4-A4R.
Procedure
1) Put STMTR paper in the cassette, and adjust the slide guide plate to the
width.
2) Select C3-STMTR (C4-STMTR) to highlight, and press the OK key so
that the machine executes auto adjustment and register the value.
3) Likewise, repeat steps 1) and 2) to register the basic value for A4R.
Chapter 16
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