Canon MF4690 - ImageCLASS B/W Laser Service Manual

Also see for ImageCLASS MF4690: Reference guide Instructions Starter Guide Operation guide Driver guide

Contents

Chapter 1111-111.1 Scanning System11.1.1 Procedure after Replacing the CIS 0016-1880After replacing the contact image sensor (CIS), go through the followingsteps to perform inter-channel output correction:1) Enter the service mode.Sequentially press the Additional functions key, 2 key, 8 key, and Additionalfunctions key on the operation panel.2) Press the arrow key on the touch panel to display "TEST MODE".3) Press [OK].4) Press the [2] key to display "SCAN TEST".5) Press the [1] key to display "SHADING".After completion of the above procedure, the contact sensor output is com-pensated and parameters are set automatically.After completion of automatic adjustment, "OK" is displayed.11.1.2 Procedure after Replacing the Copyboard Glass0016-1882After replacing the copyboard glass, go through the following steps to per-form inter-channel output correction:1) Enter the service mode.Sequentially press the Additional functions key, 2 key, 8 key, and Additionalfunctions key on the operation panel.2) Press the arrow key on the touch panel to display "TEST MODE".3) Press [OK].4) Press the [2] key to display "SCAN TEST".5) Press the [1] key to display "SHADING".After completion of the above procedure, the contact sensor output is com-pensated and parameters are set automatically.After completion of automatic adjustment, "OK" is displayed.11.2 Electrical Adjustments11.2.1 Procedure after Replacing the SCNT board 0016-1883If you have replaced the SCNT board with a new one, perform the followingoperations:Outputting reportBefore replacing the SCNT board, output and record the report for theinformation such as the user setting and the setting of the service mode.Service mode > REPORTAdditional functions > Report setting > Report outputAfter replacing the SCNT board, enter the user data and the service dataaccording to the report.Changing the jumper connectorWhen replacing the SCNT board, change the position of the jumperconnector to ON.* The SCNT board is shipped with the jumper connector of the lithiumbattery OFF.Make the following adjustments:- Correction of output between CS channels1) Enter the service mode.Sequentially press the Additional functions key, 2 key, 8 key, and Additionalfunctions key on the operation panel.2) Press the arrow key on the touch panel to display "TEST MODE".3) Press [OK].4) Press the [2] key to display "SCAN TEST".5) Press the [1] key to display "SHADING".6) Press [OK].After completion of the above procedure, the contact sensor output is com-pensated and parameters are set automatically.If automatic adjustment fails, "NG" appears. Perform the following proce-dure:Clean the scanning area of the ADF and the Backside of copyboard cover ofthe host machine, and then retry auto adjustment.