CHAPTER 5 MAINTENANCE
CHAPTER 5 –7
Follow these steps to replace the drum unit:
1. Turn off the power switch.
2. Close the output tray and open the top cover. Remove the old drum unit.
Fig. 5-10 Removing the Drum Unit
Warning
After you have just used the printer, some internal parts of the printer
are extremely hot. When you open the top cover of the printer, never
touch the shaded parts shown in the following illustration.
High Temperature
Fig. 5-11 Inside the Printer
3. Remove the toner cartridge from the drum unit and keep it in a safe
place. For more information, see
✒
Note
•
Discard the used drum unit according to local regulations. If you are not
sure of them, consult your local dealer/retailer. Be sure to seal up the
drum unit tightly so that toner powder does not spill out of the unit. Do
not discard used drum units together with domestic rubbish.
•
It is recommended to put the drum unit on a piece of disposable paper or
cloth in case of accidental toner spill or scatter.
Summary of Contents for HL-720
Page 1: ...SERVICE MANUAL MODEL HL 720 730 730Plus R LASER PRINTER ...
Page 36: ...II 19 1 3 10 Engine I O HL 720 Fig 2 21 shows the engine interface circuit Fig 2 21 ...
Page 37: ...II 20 HL 730 730Plus Fig 2 22 shows the engine interface circuit Fig 2 22 ...
Page 61: ... Fig 3 18 2 4 1 1 1 ...
Page 92: ...SERVICE MANUAL MODEL HL 760 R LASER PRINTER ...
Page 109: ...II 8 1 3 4 DRAM Two 4M bit DRAMs x 16bits are used as the RAM Fig 2 6 ...
Page 113: ...II 12 1 3 10 Engine I O Fig 2 12 shows the engine interface circuit Fig 2 12 ...
Page 114: ...II 13 1 3 11 Paper Feed Motor Drive Circuit Fig 2 13 ...
Page 133: ...Appendix 2 Main PCB Circuit Diagram 1 3 CODE UK3227000 B48K272CIR 1 3 NAME ...
Page 134: ...Appendix 3 Main PCB Circuit Diagram 2 3 CODE UK3227000 B48K272CIR 2 3 NAME ...
Page 135: ...CODE UK3227000 B48K272CIR 3 3 NAME Appendix 4 Main PCB Circuit Diagram 3 3 ...