Brother HL-3400CN Service Manual page 4

4. OPTIONS ...................................................................................................... 3-18
4.1 Lower Tray Unit ................................................................................................................. 3-18
4.2 Duplex Unit ........................................................................................................................ 3-18
4.3 Font Card / Flash Memory Card / HDD Card .................................................................... 3-18
4.4 Network Option.................................................................................................................. 3-19
4.5 RAM Expansion................................................................................................................. 3-20
4.6 HDD (Hard Disk Drive) ...................................................................................................... 3-21
CHAPTER 4 STRUCTURE OF SYSTEM COMPONENTS .............. 4-3
1. BASIC STRUCTURE...................................................................................... 4-3
1.1 Mechanical Structure........................................................................................................... 4-3
1.2 Basic Mechanism of Color Printing...................................................................................... 4-5
1.3 Structure of the OPC Belt .................................................................................................... 4-7
1.4 Print System and Transfer System...................................................................................... 4-8
1.5 Scanning System............................................................................................................... 4-23
1.6 Paper Transportation System............................................................................................ 4-25
1.7 Fusing Unit ........................................................................................................................ 4-26
2. STRUCTURE OF THE CONTROL SYSTEM ................................................ 4-28
2.1 Basic Structure - Electrical System and Functions............................................................ 4-28
2.2 Control System - Control of the Print Process................................................................... 4-37
2.3 Main PCB (Video Controller PCB) ..................................................................................... 4-46
2.4 Low-voltage Power Supply Unit......................................................................................... 4-60
2.5 High-voltage Power Supply Unit........................................................................................ 4-63
2.6 Connection Diagram.......................................................................................................... 4-65
CHAPTER 5 CONTROL PANEL OPERATION ............................... 5-3
1. PANEL LAYOUT ............................................................................................ 5-3
2. VIDEO CONTROLLER MODE ....................................................................... 5-4
2.1 Configuration of Operational Mode...................................................................................... 5-4
2.2 Toner Save Mode / Power Save Mode................................................................................ 5-5
2.3 Line Test Mode.................................................................................................................... 5-6
2.4 DRAM Test Mode .............................................................................................................. 5-10
2.5 Program Version Display Mode......................................................................................... 5-11
2.6 NVRAM Reset Mode ......................................................................................................... 5-13
3. ENGINE CONTROLLER MODE................................................................... 5-14
3.1 Configuration of Operational Mode.................................................................................... 5-14
3.2 Operation of Normal Mode ................................................................................................ 5-16
3.3 Service Mode..................................................................................................................... 5-23
3.4 Adjustment Work Procedures............................................................................................ 5-47
HL-3400CN SERVICE MANUAL