CHAPTER 8 TROUBLESHOOTING
8-54
I-9
Black Line / Blur in the Image
Phenomenon
Fine black line or blur appears in the printed image as shown in
45
.
Main Causes
(1) The corona wire of the paper discharger unit is dirty.
(2) OPC belt surface is damaged.
(3) Foreign particles (paper dust, etc.) are stuck between the cleaning blade and OPC belt.
(4) Debris adhering to the base of the toner cartridge’s developer roller where it contacts with
the OPC belt.
Countermeasures
(1) Remove the OPC belt cartridge.
1-1) Clean the discharger unit (corona wire). (See
1-2) Replace the OPC belt cartridge with a new one. (See
(2) Clean the surface of the developer roller.
I-10 Vertical
Line
Phenomenon
Vertical line appears in the printed image as shown in
print sample (10) of Page 8-45
Main Causes
(1) Foreign particles (dust, etc.) adhering to the parts located around the transfer drum, and
consequently in contact with the toner image on the transfer drum.
(2) Damage of the OPC belt due to foreign particles adhering to the blade of the OPC belt
cleaner.
Countermeasures
(1) Clean the paper discharger unit. (See
(2) Clean the charger unit (corona wire) of the OPC belt cartridge. (See
Chapter 6
.)
(3) Clean the rear face of the waste toner feeder.
(4) Replace the OPC belt cartridge with a new one.
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 ...