ii
2.5.1 Charging................................................................................................................................. II-28
2.5.2 Exposure stage ...................................................................................................................... II-29
2.5.3 Developing ............................................................................................................................. II-30
2.5.4 Transfer .................................................................................................................................. II-30
2.5.5 Drum Cleaning Stage ............................................................................................................. II-31
2.5.6 Erasing Stage......................................................................................................................... II-31
CHAPTER III DISASSEMBLY AND REASSEMBLY ................................................. III-1
3.1 Drum Unit................................................................................................................................. III-3
3.2 Top Cover ................................................................................................................................III-3
3.3 Multi-purpose Paper Tray Assy ..............................................................................................III-4
3.4 Fixing Unit ................................................................................................................................III-5
3.5 Scanner Unit ............................................................................................................................III-7
3.6 Main PCB Assy .......................................................................................................................III-7
3.7 Base Plate Assy.......................................................................................................................III-8
3.8 Panel sensor PCB Assy...........................................................................................................III-8
3.9 Low-voltage Power Supply PCB Assy .....................................................................................III-9
3.10 High-voltage Power Supply PCB Assy ....................................................................................III-9
3.11 Fan Motor...............................................................................................................................III-10
3.12 Drive Unit ...............................................................................................................................III-10
3.13 Main Motor Assy and Motor Heat Sink ..................................................................................III-11
3.14 Gears and Solenoid ...............................................................................................................III-11
3.15 Tray Extension .......................................................................................................................III-12
3.16 Paper Eject Tray Assy ...........................................................................................................III-12
1.1 Initial Check ............................................................................................................................ IV-1
1.2 Basic Procedure ..................................................................................................................... IV-2
2.1 Image Defect Examples.......................................................................................................... IV-3
2.2 Troubleshooting Image Defects .............................................................................................. IV-4
4.1 Incorporated Inspection Modes ............................................................................................ IV-17
4.2 Error codes ........................................................................................................................... IV-19
1. Connection Diagram, HL-720 .................................................................................................. V-1
2. Connection Diagram, HL-730/730Plus .................................................................................... V-2
3a. Main PCB Circuit Diagram (1/2), HL-720................................................................................. V-3
3b. Main PCB Circuit Diagram (2/2), HL-720................................................................................. V-4
4. Main PCB Circuit Diagram (1/2), HL-730/730Plus................................................................... V-5
5. Main PCB Circuit Diagram (2/2), HL-730/730Plus................................................................... V-6
6. Panel/Sensor PCB Circuit Diagram ......................................................................................... V-7
Содержание HL-720
Страница 1: ...SERVICE MANUAL MODEL HL 720 730 730Plus R LASER PRINTER ...
Страница 36: ...II 19 1 3 10 Engine I O HL 720 Fig 2 21 shows the engine interface circuit Fig 2 21 ...
Страница 37: ...II 20 HL 730 730Plus Fig 2 22 shows the engine interface circuit Fig 2 22 ...
Страница 61: ... Fig 3 18 2 4 1 1 1 ...
Страница 92: ...SERVICE MANUAL MODEL HL 760 R LASER PRINTER ...
Страница 109: ...II 8 1 3 4 DRAM Two 4M bit DRAMs x 16bits are used as the RAM Fig 2 6 ...
Страница 113: ...II 12 1 3 10 Engine I O Fig 2 12 shows the engine interface circuit Fig 2 12 ...
Страница 114: ...II 13 1 3 11 Paper Feed Motor Drive Circuit Fig 2 13 ...
Страница 133: ...Appendix 2 Main PCB Circuit Diagram 1 3 CODE UK3227000 B48K272CIR 1 3 NAME ...
Страница 134: ...Appendix 3 Main PCB Circuit Diagram 2 3 CODE UK3227000 B48K272CIR 2 3 NAME ...
Страница 135: ...CODE UK3227000 B48K272CIR 3 3 NAME Appendix 4 Main PCB Circuit Diagram 3 3 ...