Samsung ML-1610 - B/W Laser Printer Dokumentacja Strona 19
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System Overview
Samsung Electronics
Service Manual
3-5
3.1.5 LSU (Laser Scanner Unit)
The LSU unit is controlled by video controller. It scans the video data received from video controller with laser beam
by using the rotation principle of the polygon mirror to create the latent image on the OPC drum. It is the core part of
LBP.
The OPC drum rotates as the same speed as the paper feeding speed. It creates the /HSYNC signal and sends it
to the engine when the laser beam of the LSU reaches the end of the polygon mirror, and the engine detects the
/HSYNC signal to arrange the vertical line of the image on the paper. After detecting the /HSYNC signal, the image
data is sent to the LSU to arrange the its margin on the paper. The one side of the polygon mirror is one line for
scanning..
OPC Drum
Photo Diode
LD Driver circit
Protector panel
LD(Laser Diode)
Polygon Mirror
Polygon Motor
Motor Driver
- LASER PRINTER 1
- Contents 2
- Continued 3
- 1. Precautions 5
- 1.2 Safety Caution 6
- 1.2.3 Handling Precautions 7
- 1.3 ESD Precautions 8
- 2. Product Specifications 9
- 2.2.2 Controller 10
- 2.2.4 Environmental Range 11
- 2.2.5 Toner Cartridge 11
- 2.2.6.1 Input Paper Size 12
- 2.2.6.2 Input capacity 12
- 2.2.6.3 Output capacity 12
- 2.3 Model Comparison Table 13
- Product Specifications 14
- 3. System Overview 15
- Unit Layout 16
- 3.1.1 Feeding 17
- 3.1.2 Transfer Ass’y 17
- 3.1.3 Driver Ass’y 17
- 3.1.4 FUSER 17
- System Overview 18
- 3.1.6 Toner Cartridge 20
- 3.2.1 H/W Overview 21
- 3.2.1.3 Flash Memory 22
- 3.2.1.4 DRAM 22
- 3.2.2 Main Board 23
- 3.2.3.1 Introduction 25
- 3.2.4 Sensor Controller 28
- Pin Signal 29
- 3.3.1 Introduction 34
- - F/W Architecture 37
- 3.3.6 LED Behaviors 38
- 3.3.7 Error LED Operation 38
- 3.4.1 Accessory List 39
- 3.4.3 Loading Paper 42
- 3.4.5 Turning the Printer on 44
- 3.4.6 Printing a Demo Page 44
- 4. Alignment and Adjustments 46
- 4.2 Control Panel 47
- 4.2.3 Cancel button 48
- Alignment and Adjustments 49
- 4.5 Periodic Defective Image 50
- 4.6 How to use DCU 51
- 4.6.2 Code 52
- 4.6.3 Self Diagnostic Mode 53
- 4.6.4 Self Test Button 55
- 4.7 Paper Path 56
- 4.7.1 Clearing Paper Jams 57
- 4.7.2 In the Paper Exit Area 57
- 4.7.3 In the Paper Feed Area 59
- 5. Disassembly and Reassembly 62
- 5.2.1 Front Cover 63
- 5.2.2 Cassette Tray 63
- 5.2.3 SMPS Cover 64
- 5.2.4 Main Cover 64
- Jam Cover 65
- Main Cover 65
- 5.2.5 Top Cover 66
- 5.2.6 HVPS 67
- 5.2.7 RX Drive 68
- 5.2.8 Fuser 69
- Fuser Dummy Cover 70
- Lamp Cover_R 70
- Lamp Cover_L 70
- Thermostat 71
- Thermistor 71
- Disassembly and Reassembly 72
- Engine Shield 73
- (W/Main PBA, SMPS) 73
- Actuator Feed Sensor Lever 73
- Main PBA 73
- 5.2.10 LSU 74
- 5.2.11 Paper Path Frame 74
- 5.2.12 Pick_Up Roller 75
- 6. Troubleshooting 76
- 6.1.1 Basic Check List 77
- 6.1.2 Initial Inspection 78
- 6.2 Bad discharge 79
- 6.2.3 JAM 1 80
- 6.2.4 JAM 2 80
- 6.2.5 Multi-Feeding 81
- Troubleshooting 82
- 6.3 Malfunction 83
- 6.3.4 Paper Empty 84
- 6.3.6 Cover Open 85
- 6.3.9 No Power 86
- 6.4 Bad Software Environment 88
- 6.4.3 Abnormal Printing 90
- 6.4.4 SPOOL Error 91
- 6.5 Bad image 92
- 6.5.3 Horizontal Black Band 93
- 6.5.4 Black/White Spot 93
- 6.5.5 Light Image 94
- 6.5.6 Dark Image or a Black 94
- 6.5.7 Uneven Density 95
- 6.5.8 Background 95
- 6.5.9 Ghost (1) 96
- 6.5.10 Ghost (2) 96
- 6.5.11 Ghost (3) 97
- 6.5.12 Ghost (4) 97
- 7.1 Main Assembly 100
- Main Assembly Parts List 101
- 7.2 Frame Assembly 102
- Frame Assembly Parts List 103
- 7.3 Fuser Unit 104
- Fuser Unit Parts List 105
- 7.4 Paper Path Unit 106
- Paper path Unit Parts List 107
- 8. Block Diagram 108
- 8.2 System Timing Chart 109
- 9. Connection Diagram 110
- 10. Schematic Diagrams 111
- Main Board(2/4) 112
- Main Board(3/4) 113
- Main Board(4/4) 114
- Service Manual 115
- Schematic Diagram) 115
- Samsung Electronics 115
- 10-3 SMPS Circuit Diagram 116
- Schematic Diagram 117
- HVPS Circuit Diagram(2/3) 118
- • DVM(Digital Volt Meter) 120
- Acronyms and Abbreviations(2) 122
- Reference Information 123
- 11.4 Sample Tests Patterns 124
- 12. Circuit Description 125
- Circuit Description 126
- 12.1.2 PWM Controller 127
- 12.1.3 Motor Driver 128
- 12.1.4 LSU Controller 128
- 12.1.5 ADC Controller 130
- Printed in Korea 131
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