HL-3450CN SERVICE MANUAL
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I-17 Color
Misregistration
Phenomenon
Color misregistration is caused between two colors as shown in
46
.
Main Causes
(1) The OPC belt cartridge is not properly installed.
(2) The OPC belt cartridge is deformed.
(3) The cleaning brush of the drum cleaner is unstable in operation.
(4) Rotational load on the OPC belt cartridge is excessive.
** This problem might occur in the first page printed in color mode immediately after printing
in monochrome mode, or the first page immediately after turning on the printer.
Countermeasures
(1) Reset the OPC belt cartridge properly.
(2) Replace the OPC belt cartridge with a new one. (See
(3) Replace the drum cleaner with a new one.
I-18 Toner
Streak
Phenomenon
Brush mark line of uneven scanning density is caused in the image as shown in
print sample
Main Causes
(1) Main blade of the developer unit and the reset roller is not normal.
(2) Location of the toner cartridge is not correct.
(3) Transport paddle in the toner cartridge is deformed.
(4) Brush mark line appears in the continuous printing of high coverage (solid) patterns.
Countermeasures
(1) Replace the toner cartridge with a new one.
(2) Temporarily suspending the printing, agitate the toner cartridge and stabilize the
replenishment of toner.
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 ...