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6
6
6-1
Samsung Electronics
ALIGNMENT & ADJUSTMENTS
Service
Manual
6. Alignment and Adjustments
This chapter describes the main functions for service, such as the product maintenance
method, the test output related to maintenance and repair, DCU using method, Jam removing
method, and so on. It includes the contents of manual.
6.1 How to use EDC (Engine Diagnostic Control) Mode
6.1.1 EDC Setup
• EDC(Engine Diagnostic Control, EDC will be used below) is considered to test and check whether each functions of
machinery and h/w module are normal or not. All of the test function are able to be controlled by the keys and LCD
window on the panel without any other kits.
• It’s developed for related engineers, not for users.
6.1.2 Entering/Exiting Method For EDC
<1> Outline
• The method for entering “EDC” mode is especial because it is intended for technicians and not users
• After Entering the mode, the message, “Engine EDC Mode” is displayed.
• On the mode, an engineer should press the “Menu Key” to search each function he would like to test.
• Turn the power off, after the test is entirely end.
<2> Usage
1. Power off the printer.
2. Pressing the “Select key”, power the printer on.
3. Keep pressing it until the message, “Engine EDC Mode” is shown on the panel.
4. Follow the usage for a function you would like to use.
5. Turn the power off, after the test is complete.
6.1.3 Usage & Function of Key on OPE
6.1.4 Usage & Function of LCD
Key Function Description Remarks
Menu Menu To enter the main Menu
Arrow (right) Search a Menu/ Input Data To search a Menu and input a data
Arrow (left) Search a Menu/ Input Data To search a Menu and input a data
Select Execute / Select To execute a function
Cancel Stop / Cancel To stop a function
Upper Level Move To move to the upper level
Line Characters Description Remarks
Top 16 Make engineers recognizing a test location.
[Main Menu] or [Function] is displayed.
Bottom 16 Make engineers recognizing a menu or function to be tested
A menu or function name displayed
- LASER PRINTER 1
- ML-2551N 1
- ML-2552W 1
- Copyright(c) 2003.09 2
- Printed in Korea 3
- 1. Precautions 4
- 1.2 Caution for safety 5
- Precautions 6
- 1.3 ESD Precautions 7
- 2. Reference Information 8
- 2.1 Tool for Troubleshooting 8
- 2.3 Selecting a Location 10
- 2.4.1 A4 5% Patten 11
- 2.4.2 A4 2% Patten 12
- 2.4.3 A4 LSA 5% Patten 13
- 2.6 Wireless LAN 14
- Reference Information 15
- 3. Specifications 16
- 3.3 Electrical Specification 17
- 3.2 Controller Specification 17
- 3.5 Environmental Condition 18
- Specifications 19
- 4. Summary of Product 20
- 4.1.2 Rear View 21
- 4.1.3.1 Display 22
- 4.1.3.2 Buttons 23
- Accessing Control Panel Menus 24
- Summary of Product 25
- 4.1.3.4 Special Features 26
- 4.2 System Layout 28
- 4.2.1 Feeding 29
- 1) Thermostat 30
- 3) Heat roller 30
- 4) Pressure roller 30
- 5) Items for safety 30
- 4.2.6 Toner Cartridge 31
- 4.3 Main Board 32
- 4.3.1 ASIC (SPGPi) 33
- Summary of product 34
- 4.3.2. Memory part 36
- 4.3.3. RESET Circuit 36
- 4.3.4. ClOCK Circuit 36
- 4.3.5. INTERFACE Part 36
- 4.3.6. Sensor input circuit 37
- Exit Sensor 38
- HVPS FuserMain PBA 38
- >>Power Switch : Use 40
- >>AC Input 40
- >>Rated Power Output 40
- >>Consumption Power 40
- 4.4.3. Fuser AC Power Control 41
- 4.5.1.1 Jam 0 42
- 4.5.1.2 Jam 1 42
- 4.5.1.3 Jam 2 42
- 4.5.1.4 Duplex Jam 1 42
- 4.5.1.5 Duplex Jam 2 42
- 4.5.4 Fusing 43
- 4.5.5 LSU 43
- 5. Disassembly and Reassembly 45
- Transfer Roller 46
- MPF Ass’y 47
- Tray Link 47
- MP Cover 47
- Knock Up Plate Ass’y 47
- Retard Ass’y 48
- 5.5 Cover-Right 49
- 5.6 Main PBA 50
- Main Drive Ass’y 51
- Main Motor Ass’y 51
- Cover Joint PBA 51
- 5.8 Connector PBA 52
- MP Solenoid 53
- Main Solenoid 53
- Cover-Rear 54
- 5.11 DC Fan 55
- Tie Stopper 56
- Rear Cover 56
- Top Cover 57
- Micro Switch PBA 58
- Sensor Cap 58
- Thermistor 59
- Pressure Roller 60
- 5.17 Exit Drive 61
- Actuator 62
- 5.19 LSU 63
- LSU Lower Cover 64
- HV Small 64
- Toner Sensor PBA 64
- PTL Upper 65
- Gear Cap 65
- 5.22 MP Pick-up Ass’y 66
- Bottom Cross Bar 68
- Pick Up Unit 69
- Power Shield 70
- Engine PBA 71
- <1> Outline 72
- <2> Usage 72
- ALIGNMENT & ADJUSTMENTS 74
- Service 74
- 6.1.2.5 Sensor Test 77
- Toner Cartridge 79
- • Simplex 80
- • Duplex 80
- • In the Tray1 81
- • In the Optional Tray2 82
- • In the Multi-Purpose Tray 82
- 6.2.1.5 In the Duplex Area 85
- • Duplex Jam 1 85
- • Duplex Jam 2 85
- 6.3 Sample Pattern 86
- 6.3.3.1 Remaining Toner: xx% 87
- 6.3.3.2 OPC Count: XXXXXX 87
- 6.3.3.4 Supplier: SAMSUNG 87
- <Rollers Layout> 90
- 7. Troubleshooting 92
- 7.1.3 Horizontal Black Band 93
- 7.1.4 Black/White Spot 93
- 7.1.5 Light Image 94
- 7.1.9 Ghost (1) 96
- 7.1.10 Ghost (2) 96
- 7.1.11 Ghost (3) : Fuser 97
- 7.2.1 Wrong Print Position 99
- 7.2.2 JAM 0 99
- 7.2.4 JAM 2 100
- 7.2.3 JAM 1 100
- 7.2.6 JAM Duplex 2 101
- 7.2.5 JAM Duplex 1 101
- 7.2.7 Multi-Feeding 102
- Troubleshooting 103
- Samsung Electronics 103
- Service Manual 103
- 7.3.1 Fuser Error 104
- 7.3.2 LSU Error 104
- 7.3.4 Paper Empty 105
- 7.3.6 Cover Open 106
- 7.3.9 No Power 108
- 7.4 Toner Cartridge Service 110
- 7.4.4.1 Invalid Toner 111
- 7.4.4.2 Low Toner 111
- 7.4.4.3 Replace Cartridge 111
- Digital Printer 112
- 7.5.3 Abnormal Printing 117
- 7.5.4 SPOOL Error 118
- Main Assembly Parts List 122
- 8.2 Base-Houshing Assembly 124
- 8.3 Frame Assembly (1) 126
- Frame Assembly (2) 127
- Frame Assembly Parts List 128
- 8.4 Fuser Assembly 131
- 8.5 Main Driver Assembly 134
- 8.6 Exit Driver Assembly 135
- 8.7 Regi Assembly 136
- 8.8 SMPS Assembly 137
- SMPS Assembly Parts List 138
- 8.9 Cassette Assembly 139
- Cassette Assembly Parts List 140
- 8.10 SCF Assembly 141
- SCF Assembly Parts List 142
- 9. Block Diagram 144
- Block Diagram 145
- 10. Connection Diagram 146
- Connection Diagram 147
- Main Circuit Diagram(1/9) 148
- Main Circuit Diagram(2/9) 149
- Main Circuit Diagram(3/9) 150
- Main Circuit Diagram(4/9) 151
- Main Circuit Diagram(5/9) 152
- Main Circuit Diagram(6/9) 153
- Main Circuit Diagram(7/90) 154
- Main Circuit Diagram(8/9) 155
- Main Circuit Diagram(9/9) 156
- Schematic Diagrams 157
- HVPS Circuit Diagram(220V) 158
- SMPS Circuit Diagram(220V) 160
- SCF PBA Circuit Diagram(2/2) 168
- RAM DIMM Circuit Diagram(2/2) 170
- 11-7 PS3 ROM Circuit Diagram 172
- 11-12 OPC PBA Circuit Diagram 175
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