HL-3450CN SERVICE MANUAL
4-13
2 Exposing
The exposing process means that the OPC belt surface is exposed to the laser beam to form
an electrostatic latent image.
(1)
Structure of scanner unit
i) The scanner unit is located as shown in Fig.4-8.
ii) The source of the laser beam is a semiconductor laser.
iii) The laser light is scanned onto the OPC belt by converting the laser light to a beam
of light through the lens and reflective mirror to form an electrostatic latent image.
(2)
Process of exposing (Refer to Fig.4-13.)
i) The OPC belt surface has been charged to the potential -Vo (V) in the charging
process.
ii) The laser light is scanned at right angles to the forward direction of the OPC belt.
iii) High speed switching of the laser is made according to the transmitted image data.
iv) The charge of the areas radiated by the laser light is reduced to the potential -VR
(V).
v) An invisible electrostatic latent image is formed on the OPC belt as shown in Fig. 4-
13.
-V
R
-V
O
Fig. 4-13
Charging Exposing
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 ...