Canon LBP6670dn Series Service Manual

33 3-123-12Disassembly/Assembly > Controller System > Removing the Main Controller Board > Removing the Main Controller BoardDisassembly/Assembly > Controller System > Removing the Main Controller Board > Removing the Main Controller BoardController SystemRemoving the Main Controller Board■ Actions before ReplacementActions before Replacement:• Write down the serial number of the host machine.(Check it from SERVIVE MODE>FUNCTION GR.>SN MAIN.) (LBP6670 only)• Back up the setting value (refer to the following backup method).* When backup is not possible, the setting data cannot be migrated.Backup MethodBackup Method Items which can be backed up ReferUSB Setting Value （USER MODE, SERVICE MODE, etc）Expansion ROM for servicing/SublogBoardSetting Value （USER MODE, SERVICE MODE, etc）Management Data （Page Counter, Serial No.）Backup procedure using USB memory1) Connect the USB memory to the host machine.2) SERVIVE MODE > FUNCTION GR. > ECONF > EXPORT > ALL > YesBackup procedure using Expansion ROM for servicing/Sublog BoardRefer to [Backup/Restoration by Expansion ROM for servicing and Sublog Board 5-53].T-3-9■ Removing the Main Controller BoardPreparations1) Remove Left Cover.(Refer to page 3-9)Procedure (LBP6680)1) Remove Controller Cover [1].• 2 Flat cable [2]• 2 Connector [3]• 4 Screw [4]x6x4[4][3][2][5][1] [4] [2][5]2) Remove Main Controller Board [1].• 2 Flat Cables [2]• 5 Connectors [3]• 4 Screws [4]• 2 Screws [5]x2[4]x4x6[4][3][4][3][2][4] [3][3][2][1][4]