Konica Minolta magicolor 2490MF Service Manual page 30

Theory of operation ver. 1.0 July. 2006
15.3.1 Paper feed control ....................................................................................... 53
15.3.2 Paper feed speed control ............................................................................ 53
15.3.3 Paper feed mechanism ............................................................................... 54
15.3.4 Double feed prevention mechanism............................................................ 55
15.3.5 Paper empty condition detection................................................................. 55
15.3.6 Paper feed retry function............................................................................. 55
16. Conveyance section/registration roller .................................................................. 56
16.1 Composition........................................................................................................ 56
16.2 Drive ................................................................................................................... 57
16.3 Operation ............................................................................................................ 57
16.3.1 Registration roller control ............................................................................ 57
16.3.2 OHP film detection ...................................................................................... 58
16.3.3 Size error detection control ......................................................................... 58
17. Fusing section ....................................................................................................... 59
17.1 Composition........................................................................................................ 59
17.2 Drive ................................................................................................................... 60
17.3 Operation ............................................................................................................ 60
17.3.1 Heating Roller drive control......................................................................... 60
17.3.2 Fusing temperature control ......................................................................... 62
17.3.3 Protection against abnormally high temperature ........................................ 66
17.3.4 PPM control ................................................................................................ 67
18. Paper exit section .................................................................................................. 68
18.1 Composition........................................................................................................ 68
18.2 Drive ................................................................................................................... 69
18.3 Operation ............................................................................................................ 69
18.3.1 Exit tray full detection .................................................................................. 69
19. Image stabilization control..................................................................................... 70
19.1 Overview............................................................................................................. 70
19.2 Operation ............................................................................................................ 71
19.2.1 Leak detection control ................................................................................. 71
19.2.2 AIDC Sensor LED intensity control ............................................................. 71
19.2.3 Reflectance measurement control .............................................................. 71
19.2.4 Control of the maximum amount of toner sticking....................................... 71
19.2.5 Laser intensity adjustment control .............................................................. 71
γ correction control ...................................................................................... 71
19.2.6
19.3 Operation timing ................................................................................................. 72
19.4 Operation flow..................................................................................................... 72
20. Other control ......................................................................................................... 73
20.1 Fan control .......................................................................................................... 73
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