Main scanning magnification correction control computes colour displacement correction values based on the partial magnification adjustment values for the image

main scanning direction. There are eight blocks for each of the four colours, Y, M, C and Bk, giving a total of 32 values, which are programmed in the service

mode when the device is installed.

Whenever the laser scanner unit is replaced, all 32 of the partial magnification adjustment values for the image main scanning direction (which appear on a label

affixed to new laser scanner units) must be entered into the following service modes, otherwise colour displacement will occur.

COPIER > ADJUST > LASER >FSLUT-Y 1 to 8 correction values for partial magnification correction Y blocks 1 to 8

COPIER > ADJUST > LASER >FSLUT-M 1 to 8 correction values for partial magnification correction M blocks 1 to 8

COPIER > ADJUST > LASER >FSLUT-C 1 to 8 correction values for partial magnification correction Y blocks 1 to 8

COPIER > ADJUST > LASER >FSLUT-K 1 to 8 correction values for partial magnification correction K blocks 1 to 8

Also, when the DC controller circuit board is replaced, the above values should be entered as per the details on the service label or on the P-PRINT label.

7.3.10 ATVC Control

Color iR C3380G / Color iR C2880G / Color iR C3380i / Color iR C3380 / Color iR C2880i / Color iR C2880 / iR C3480 / iR C3480i / iR C3080 / iR C3080i / iR

C2550

In the case of transferring toner, this control has 2 types of controls: the primary transfer ATVC and the secondary transfer ATVC, to decide the most suitable

transfer bias.

[1] Primary transfer roller

[2] Secondary transfer outside roller

[3] Machine inside environment sensor

[4] Machine outside environment sensor

7-28

[1]

F-7-33

[1]

Laser Scanner Unit

[4]

[3]