3.9 Frame & Drive................................................................................................................................. 6 - 40

3.9.1 Major functions........................................................................................................................ 6 - 40

3.9.2 Reference diagram ................................................................................................................. 6 - 41

3.10 Electrical ....................................................................................................................................... 6 - 42

3.10.1 Major functions...................................................................................................................... 6 - 42

3.10.2 Reference diagram ............................................................................................................... 6 - 43

3.10.3 Data Flow.............................................................................................................................. 6 - 44

4. MODES .....................................................................................................................6 - 45

4.1 Print Mode....................................................................................................................................... 6 - 45

4.2 Operation Modes ............................................................................................................................ 6 - 45

5. Control .......................................................................................................................6 - 46

5.1 Control of Paper Size...................................................................................................................... 6 - 46

5.2 Selective Control on Paper Cassette .............................................................................................. 6 - 46

5.3 PRINT HEAD Light Quantity Control .............................................................................................. 6 - 46

5.4 Process Control .............................................................................................................................. 6 - 47

5.4.1 Potential Control ..................................................................................................................... 6 - 47

5.4.2 Toner Density Control ............................................................................................................. 6 - 48

5.4.3 High Area Coverage Mode ..................................................................................................... 6 - 49

5.4.4 Admix Mode ............................................................................................................................ 6 - 49

5.4.5 LED Light Quantity Control of AUTOMATIC DENSITY CONTROL SENSOR........................ 6 - 49

5.5 Color Registration Control............................................................................................................... 6 - 50

5.6 Transfer Roller Control.................................................................................................................... 6 - 51

5.6.1 Detecting the Installation of Transfer Roller............................................................................ 6 - 51

5.6.2 Detecting the Life of Transfer Roller ....................................................................................... 6 - 51

5.7 Toner Control .................................................................................................................................. 6 - 52

5.7.1 SENSOR NO TONER............................................................................................................. 6 - 52

5.7.2 Toner presence control ........................................................................................................... 6 - 52

5.8 Fuser Control .................................................................................................................................. 6 - 53

5.8.1 Fuser temperature control....................................................................................................... 6 - 53

5.8.2 Cool down ............................................................................................................................... 6 - 53

5.8.3 Sensor Warm-up..................................................................................................................... 6 - 53

6. Drive Transmission Route and Gear Layout .............................................................6 - 54

6.1 MAIN DRIVE ASSEMBLY............................................................................................................... 6 - 54

6.2 DEVELOPER DRIVE ASSEMBLY.................................................................................................. 6 - 56

6.3 TONER DISPENSER ASSEMBLY (Y, M, C, K) ............................................................................. 6 - 58

6.4 DRIVE ASSY FUSER ..................................................................................................................... 6 - 59

6.5 MOTOR ASSY DUP ....................................................................................................................... 6 - 60

Chapter 6 Principles of Operation

Table of Contents