Develop QC 2235 Plus Service Manual page 20

14. Synchronizing Roller section.............................................................................. 2-69
14.1 Composition .................................................................................................... 2-69
14.2 Drive ................................................................................................................ 2-69
14.3 Operation......................................................................................................... 2-70
14.3.1 Synchronizing Roller control....................................................................... 2-70
14.3.2 OHP detection ............................................................................................ 2-71
15. Fusing section.................................................................................................... 2-72
15.1 Composition .................................................................................................... 2-72
15.2 Drive ................................................................................................................ 2-73
15.3 Operation......................................................................................................... 2-74
15.3.1 Fusing Roller drive control.......................................................................... 2-74
15.3.2 Fusing Roller pressure/retraction mechanism ............................................ 2-76
15.3.3 Fusing temperature control ........................................................................ 2-77
15.3.4 Protection against abnormal conditions ..................................................... 2-79
15.3.5 Detection of a New Fusing Unit .................................................................. 2-81
15.3.6 PPM control................................................................................................ 2-81
16. Paper exit section............................................................................................... 2-82
16.1 Composition .................................................................................................... 2-82
16.2 Drive ................................................................................................................ 2-83
17. Image stabilization control ................................................................................. 2-84
17.1 Overview ......................................................................................................... 2-84
17.2 Operation......................................................................................................... 2-85
17.2.1 Background margin control ........................................................................ 2-85
17.2.2 AIDC Sensor LED intensity control ............................................................ 2-85
17.2.3 Max. density control ................................................................................... 2-85
17.2.4 g correction control..................................................................................... 2-85
17.3 Operation timing .............................................................................................. 2-85
17.4 Operation flow ................................................................................................. 2-86
18. Image processing............................................................................................... 2-87
18.1 Scanner section image processing block diagram .......................................... 2-87
18.2 Write section image processing block diagram ............................................... 2-89
19. Other control ...................................................................................................... 2-91
19.1 Fan control....................................................................................................... 2-91
19.1.1 Construction ............................................................................................... 2-91
19.1.2 Operation.................................................................................................... 2-92
19.2 Power distribution control at machine power up .............................................. 2-93
19.2.1 Parts operated when the Power Switch is turned ON ................................ 2-93
19.3 Counter control................................................................................................ 2-94
19.3.1 Construction ............................................................................................... 2-94
QC 2235plus Theory of Operation Ver1.0 Mar. 2004
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