
ii
2.3
Sensors................................................................................................................................... II-29
2.3.1
Cover Sensor............................................................................................................. II-29
2.3.2
Toner Empty Sensor.................................................................................................. II-29
2.4
Drum Unit................................................................................................................................ II-30
2.4.1
Photosensitive Drum ................................................................................................. II-30
2.4.2
Primary Charger ........................................................................................................ II-30
2.4.3
Developer Roller........................................................................................................ II-30
2.4.4
Transfer Roller........................................................................................................... II-30
2.4.5
Cleaner Roller............................................................................................................ II-30
2.4.6
Erase Lamp .............................................................................................................. II-30
2.5
Print Process .......................................................................................................................... II-30
2.5.1
Charging ................................................................................................................... II-30
2.5.2
Exposure Stage ......................................................................................................... II-31
2.5.3
Developing................................................................................................................. II-32
2.5.4
Transfer ..................................................................................................................... II-32
2.5.5
Drum Cleaning Stage ................................................................................................ II-33
2.5.6
Erasing Stage ............................................................................................................ II-33
2.5.7
Fixing Stage............................................................................................................... II-33
CHAPTER III DISASSEMBLY AND REASSEMBLY.......................................III-1
1. SAFETY PRECAUTIONS..................................................................................................III-1
2. DISASSEMBLY FLOW......................................................................................................III-2
3. DISASSEMBLY PROCEDURE .........................................................................................III-3
3.1
Output Tray ASSY ................................................................................................................... III-3
3.2
Drum Unit................................................................................................................................. III-3
3.3
Top Cover ................................................................................................................................ III-4
3.4
Rear Cover .............................................................................................................................. III-4
3.5
MP Sheet Feeder ASSY .......................................................................................................... III-5
3.6
Fixing Unit ................................................................................................................................ III-6
3.7
Scanner Unit ............................................................................................................................ III-8
3.8
Main PCB ASSY .................................................................................................................... III-10
3.9
Base Plate ASSY ................................................................................................................... III-10
3.10
Panel Sensor PCB ASSY ......................................................................................................III-11
3.11
Low-voltage Power Supply PCB ASSY ................................................................................. III-12
3.12
High-voltage Power Supply PCB ASSY................................................................................. III-13
3.13
Sub Fan Motor ASSY ............................................................................................................ III-14
3.14
Fan Motor ASSY ................................................................................................................... III-14
3.15
Drive Unit ............................................................................................................................... III-15
3.16
Main Motor ASSY .................................................................................................................. III-16
3.17
Sub Motor ASSY.................................................................................................................... III-16
3.18
Paper Support........................................................................................................................ III-17
3.19
Extension Support Wire ......................................................................................................... III-17
4. PACKING ........................................................................................................................III-18
Summary of Contents for HL-1020
Page 1: ......
Page 36: ...II 20 Fig 2 22 shows the CDCC interface circuit Fig 2 22 HL 1050 ...
Page 37: ...II 21 1 3 10 Engine I O Fig 2 23 shows the engine interface circuit Fig 2 23 HL 820 1020 1040 ...
Page 38: ...II 22 Fig 2 24 shows the engine interface circuit Fig 2 24 HL 1050 ...
Page 67: ...III 18 4 PACKING Fig 3 32 Documents Accessory carton Pad Pad Printer Bag Carton ...
Page 101: ...CODE UK4007000 B48K312CIR NAME V 5 Appendix 5 Main PCB Circuit Diagram HL 820 1020 1040 1 2 ...
Page 102: ...Appendix 6 Main PCB Circuit Diagram HL 820 1020 1040 2 2 CODE UK4007000 B48K312CIR NAME A 6 ...
Page 103: ...Appendix 7 Main PCB Circuit Diagram HL 1050 1 5 CODE UK4041000 B512001CIR NAME A 7 ...
Page 104: ...Appendix 8 Main PCB Circuit Diagram HL 1050 2 5 CODE UK4041000 B512001CIR NAME A 8 ...
Page 105: ...Appendix 9 Main PCB Circuit Diagram HL 1050 3 5 CODE UK4041000 B512001CIR NAME A 9 ...
Page 106: ...Appendix 10 Main PCB Circuit Diagram HL 1050 4 5 CODE UK4041000 B512001CIR NAME A 10 ...
Page 107: ...Appendix 11 Main PCB Circuit Diagram HL 1050 5 5 CODE UK4041000 B512001CIR NAME A 11 ...
Page 108: ...Appendix 12 Panel Sensor PCB Circuit Diagram CODE UK4010000 B48K303CIR NAME A 12 ...
Page 117: ...Apr 98 84U005BE0 PARTS REFERENCE LIST MODEL HL 820 1020 1040 1050 R LASER PRINTER ...
Page 122: ...1 1 1 MODEL HL 1050 84U 861 101 103 104 84U 862 106 6 4 5 MAIN PCB HL 1050 OTHERS ISRAEL 3 ...
Page 135: ...CONTENTS LOWER TRAY UNIT List 1 Drawing 2 ...
Page 137: ... 2 GENERAL DRAWING MODEL LT 24CL 54S X06 4 3 1 6 5 2 7 ...
Page 214: ......
Page 296: ...USER S GUIDE A 12 HP LaserJet IIP 6P EPSON FX 850 IBM Propritner XL EPSON FX 850 ...