HL-3450CN SERVICE MANUAL
1-7
No.
Part Name
Outline of Functions
1 Upper
cover
To act as an upper enclosure and also as a
paper tray for printed paper.
2 Control
panel
To display the status of printer operations and
control the printer directly.
3 Front
cover
To act as a front enclosure, opened when
replacing a toner cartridge or waste toner pack.
4
Top cover (Paper exit
unit)
To exit the printed paper onto the upper cover,
acting also as part of the paper tray for printed
paper. To be opened when replacing an OPC
belt cartridge or Drum cleaner.
5 Power
button
To operate power-on and off to the printer.
(Push for On/Off operation)
6
Power inlet
To connect a power supply cable.
7
Rear access cover
To act as a rear enclosure, opened when
clearing an internal jam or doing maintenance
work.
8 Controller
box
Space where the main (video controller) PCB is
installed.
Summary of Contents for HL-3450CN Series
Page 15: ...HL 3450CN SERVICE MANUAL xiii 3 Rating Label For US For Europe 4 Operation Label 5 Jam Label ...
Page 17: ...HL 3450CN SERVICE MANUAL CHAPTER 1 PRODUCT OUTLINE ...
Page 27: ...HL 3450CN SERVICE MANUAL CHAPTER 2 SPECIFICATIONS ...
Page 39: ...CHAPTER 3 INSTALLATION ...
Page 54: ...HL 3450CN SERVICE MANUAL CHAPTER 4 STRUCTURE OF SYSTEM COMPONENTS ...
Page 104: ...HL 3450CN SERVICE MANUAL 4 51 Main PCB Circuit Diagram 1 8 CODE B512137CIR 1 8 LJ8907001 NAME ...
Page 106: ...HL 3450CN SERVICE MANUAL 4 53 Main PCB Circuit Diagram 3 8 CODE B512137CIR 3 8 LJ8907001 NAME ...
Page 108: ...HL 3450CN SERVICE MANUAL 4 55 Main PCB Circuit Diagram 5 8 CODE B512137CIR 5 8 LJ8907001 NAME ...
Page 110: ...HL 3450CN SERVICE MANUAL 4 57 Main PCB Circuit Diagram 7 8 CODE B512137CIR 7 8 LJ8907001 NAME ...
Page 126: ...HL 3450CN SERVICE MANUAL CHAPTER 5 CONTROL PANEL OPERATION ...
Page 173: ...HL 3450CN SERVICE MANUAL CHAPTER 6 PERIODIC MAINTENANCE ...
Page 208: ...CHAPTER 7 DISASSEMBLY RE ASSEMBLY ...
Page 264: ...HL 3450CN SERVICE MANUAL CHAPTER 8 TROUBLESHOOTING ...
Page 310: ...HL 3450CN SERVICE MANUAL 8 47 5 IMAGE FAILURE 1 2 3 4 5 6 7 8 9 a 9 b 10 11 12 13 14 ...
Page 311: ...CHAPTER 8 TROUBLESHOOTING 8 48 15 a 15 b 16 17 18 19 20 21 22 23 24 25 26 27 28 244m m 29 ...