HL-3450CN SERVICE MANUAL
8-53
I-7
White Line (2)
Phenomenon
Vertical white line appears from the leading edge to the trailing edge of the printed image as
shown in
Main Causes
The dustproof glass of the laser unit is smeared with toner or foreign particles.
Countermeasures
Clean the dustproof glass. (See
(1) Remove the OPC belt cartridge and toner cartridges.
(2) Remove the dustproof glass from the laser unit.
(3) Clean the dustproof glass.
I-8
Vertical White Band
Phenomenon
White band appears in the vertical direction of printed image as shown in
Page 8-45
.
Main Causes
Silicone oil adhering to the transfer drum.
Fig. 8-10
Countermeasures
(1) Wipe off the oil adhering to the transfer unit and its perimeter.
(2) Replace the transfer drum with a new one. (See
(3) If the oil adhesion is excessive, replace the OPC belt cartridge and drum cleaner with new
ones. (See
Section 4.1 and 4.5 of Chapter 6
Transfer drum
Adhered silicon oil
Transfer drum
Transfer unit
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 ...