Samsung ML-2552W Specifications download pdf (Page 46)

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5-2

Disassembly and Reassembly

Samsung Electronics

Service Manual

5.2 Transfer Roller

1. Open the Open Cover. 2.

Hold the lever at both ends of the roller, then

remove the roller.

* Do not grab the transfer roller shown in picture (A). It may cause a malfunction due

to a foreign object.

* Hold the both sides of the transfer roller shown in picture (B) when replacing it.

Transfer RollerTransfer Roller

Transfer Roller

(A) (B)

Transfer Roller

Holder

Open Cover

1 2 ... 41 42 43 44 45 46 47 48 49 50 51 ... 175 176

LASER PRINTER 1
ML-2551N 1
ML-2552W 1
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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Samsung ML-2552W Specifications Page 46

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