Canon iR2200 Service Handbook page 176

CHAPTER 5 SERVICE MODE
<CCD>
Use it to make CCD/shading-related adjustments.
If faulty images are generated after the execution of COPIER>FUNCTION>CCD>CCD-
ADJ, enter the settings indicated on the service label.
SH-TRGT
Use it to enter the white level target value for shading correction.
SH-PATIO
Use it to enter the data on the white level ratio (the standard white plate and
the standard white paper) for shading correction.
EGGN-ST
Use it to enter the adjustment value for the edge gain correction start posi-
tion of the CCD.
EGGN-END
Use it to enter the adjustment value for the end gain correction end position
of the CCD.
<LASER>
Use it to adjust the laser output.
If you have cleared the RAM on the DC controller PCB and replaced the PCB, enter the
settings indicated on the service label.
PVE-OFST
Use it to adjust the point of laser exposure.
Range of -600 to +600 (a change of '23' causes a shift of about 1 mm; a higher
adjustment setting shifts the image toward the rear in main scanning direction)
LA-OFF
Use it to adjust the laser trailing edge OFF timing when non-default paper is
used.
Range of 0 to 600
adjustment (a higher setting increases the time interval up to de-activation)
POWER
Use it to adjust the laser paper for non-potential control mode.
Range of 0 to 255
adjustment
5-48
COPIER>ADJUST>CCD
COPIER>ADJUST>LASER