TABLE OF CONTENTS
iv
2.2.3 Paper eject
........................................................................................................................
3-22
2.3
Sensors
...........................................................................................................................
3-23
2.3.1 Cover sensors
...................................................................................................................
3-23
2.3.2 Toner sensors
...................................................................................................................
3-23
2.3.3
Cassette sensor / Paper empty sensor (HL-5040/5050/5070N only)
................................
3-24
2.3.4 Paper eject sensor
............................................................................................................
3-24
2.3.5 MP PE sensor
...................................................................................................................
3-25
2.4
Drum Unit
........................................................................................................................
3-26
2.4.1 Photosensitive drum
.........................................................................................................
3-26
2.4.2 Primary charger
................................................................................................................
3-26
2.4.3 Transfer roller
....................................................................................................................
3-26
2.4.4 Cleaner
.............................................................................................................................
3-26
2.5
Toner Cartridge
...............................................................................................................
3-26
2.6
Print Process
..................................................................................................................
3-26
2.6.1 Charging
...........................................................................................................................
3-26
2.6.2 Exposure stage
.................................................................................................................
3-27
2.6.3 Developing
........................................................................................................................
3-28
2.6.4 Transfer
.............................................................................................................................
3-28
2.6.5 Fixing stage
.......................................................................................................................
3-29
CHAPTER 4
DISASSEMBLY AND RE-ASSEMBLY
..............................
4-1
1.
SAFETY PRECAUTIONS
........................................................................................
4-1
2.
DISASSEMBLY FLOW
............................................................................................
4-2
3.
DISASSEMBLY PROCEDURE
................................................................................
4-3
3.1
AC Cord
............................................................................................................................
4-3
3.2
Drum Unit
..........................................................................................................................
4-3
3.3
Paper Tray
.................................................................................................................
4-4
3.4
Access Cover
..................................................................................................................
4-14
3.5
Rear Cover C
..................................................................................................................
4-14
3.6
Outer Chute (for HL-5030/5040 only)
.............................................................................
4-15
3.7
Rear Cover MP ASSY /Outer Chute MP ASSY (for HL-5050/5070N only)
...................
4-16
3.8
Rear Cover L/R
...............................................................................................................
4-17
3.9
Side Cover L/R
...............................................................................................................
4-18
3.10 Top Cover
.......................................................................................................................
4-19
3.11 Front Cover ASSY (for HL-5030/5040 only)
...................................................................
4-22
3.12 MP Unit (for HL-5050/5070N only)
.................................................................................
4-23
3.13 Fixing Unit
.......................................................................................................................
4-29
3.14 Laser Unit
.......................................................................................................................
4-38
3.15 Main PCB
........................................................................................................................
4-40
3.16 Base Plate/ LV Insulation Sheet
.....................................................................................
4-42
3.17 Engine PCB
....................................................................................................................
4-43
3.18 High-voltage PS PCB ASSY
...........................................................................................
4-44
3.19 Low-voltage PS PCB ASSY
............................................................................................
4-45
3.20 Paper Feeder
..................................................................................................................
4-46
3.21 Frame L/ Drive Unit
.........................................................................................................
4-54
3.22 Fan Motor 60 Unit LV/ Fan Motor 60 Unit
.......................................................................
4-58
3.23 Frame R
..........................................................................................................................
4-59
4.
PACKING
..............................................................................................................
4-61