2.5.3.3 Fixing Unit Failure Detection.................................................................................................................................................. 2- 36
2.6 Engine Control System .............................................................................................................................2- 36
2.6.1 Construction .......................................................................................................................................................... 2- 36
2.6.1.1 Overview ................................................................................................................................................................................ 2- 36
2.6.2 DC Controller (DCNT) ........................................................................................................................................... 2- 37
2.6.2.1 Outline.................................................................................................................................................................................... 2- 37
2.6.2.2 Operations ............................................................................................................................................................................. 2- 37
2.6.2.4 Main Motor Control ................................................................................................................................................................ 2- 38
2.6.2.6 Cooling Fan............................................................................................................................................................................ 2- 40
2.6.3 System Controller (SCNT)..................................................................................................................................... 2- 41
2.6.3.1 Outline.................................................................................................................................................................................... 2- 41
3.1.2 Toner cartridge removal .......................................................................................................................................... 3- 1
3.1.3 Drum cartridge removal ........................................................................................................................................... 3- 2
3.2.1 Front Cover.............................................................................................................................................................. 3- 2
3.2.1.1 Removing the Cassettes.......................................................................................................................................................... 3- 2
3.2.1.2 Removing the Rear Cover ....................................................................................................................................................... 3- 2
3.2.1.5 Removing the Lower Front Cover ............................................................................................................................................ 3- 4
3.2.1.6 Removing the Front Cover....................................................................................................................................................... 3- 4
3.2.2 Rear Cover .............................................................................................................................................................. 3- 4
3.2.2.1 Removing the Rear Cover ....................................................................................................................................................... 3- 4
3.2.3 Top Cover................................................................................................................................................................ 3- 5
3.2.3.1 Removing the Cassettes.......................................................................................................................................................... 3- 5
3.2.3.2 Removing the Rear Cover ....................................................................................................................................................... 3- 5
3.2.3.3 Removing the Reader Assembly ............................................................................................................................................. 3- 5
3.2.3.4 Removing the Right Cover....................................................................................................................................................... 3- 6
3.2.3.5 Removing the Left Cover ......................................................................................................................................................... 3- 6
3.2.3.7 Removing the Face-Down Cover............................................................................................................................................. 3- 6
3.2.3.8 Removing the Top Cover ......................................................................................................................................................... 3- 7
3.2.4 Right Cover.............................................................................................................................................................. 3- 8
3.2.4.1 Removing the Cassettes.......................................................................................................................................................... 3- 8
3.2.4.2 Removing the Rear Cover ....................................................................................................................................................... 3- 8
3.2.5 Left Cover ................................................................................................................................................................ 3- 9
3.2.5.1 Removing the Cassettes.......................................................................................................................................................... 3- 9
3.2.5.2 Removing the Rear Cover ....................................................................................................................................................... 3- 9
3.2.6 Upper Right Cover................................................................................................................................................. 3- 10
3.2.6.1 Removing the Rear Cover ..................................................................................................................................................... 3- 10
3.2.6.2 Removing the Reader Assembly ........................................................................................................................................... 3- 10
3.2.6.3 Removing the Scanner Unit ................................................................................................................................................... 3- 11
3.2.7 Upper Left Cover ................................................................................................................................................... 3- 11
3.2.7.1 Removing the Rear Cover ..................................................................................................................................................... 3- 11
3.2.7.2 Removing the Reader Assembly ........................................................................................................................................... 3- 12
3.2.7.3 Removing the Scanner Unit ................................................................................................................................................... 3- 13
3.2.8 Face-up cover........................................................................................................................................................ 3- 13
3.2.8.1 Removing the Fixing Assembly.............................................................................................................................................. 3- 13
Contents