HL-3450CN SERVICE MANUAL
4-37
2.2
Control System - Control of the Print Process
A Micro CPU mounted on the MCTL PWB controls the print processes.
<Print Sequence Diagram>
Host Computer
I/F
Control
Control
Panel
Cooling
Fan
Belt
Sensor
Drum
Sensor
DM
ATC (4 pcs.)
Y
M
C
K
Scanner
Motor
LDU
PD
Laser Control
CPU
Sequence Control
Temperature Control
Toner Connection Control
Control Panel Control
Error Clearance Program
Oil Sensor
Fusing Unit
DC Power
Supply Unit
High Voltage Unit
Interlock Switches
Paper Empty Sensor
Paper Feed Sensor
Paper Size Sensor
Paper Exit Sensor
OHP Sensor
Toner Empty Sensor
Drum Jam Sensor
Cleaning Roller
Sensor
I/F
Controller
Video
Controller
MCTL (Engine Controller)
Main
Motor
Cooling
Fan
Cleaning Roller Sensor
Drum Encoder
Belt Sensor
Oil Sensor
Paper Full Sensor
Waste Toner Sensor
Toner Key Sensor
Developer Sensor
Temperature Sensor
Fig. 4-33
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 ...