Samsung ML-3471ND Specifications download pdf (Page 125)

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Adjustment and Troubleshooting

Service Manual

4-57

Samsung Electronics

9) No Power

1. Check if the power input

and SMPS output are normal.

Replace the power supply cord

or SMPS.

1. Replace the control board.

2. Replace the OP panel.

2. Check the inferiority

of LED-Panel or LDC window on the

front-cover if the OP panel does not

appear after normal

warming-up.

Description: When system power is turned on, all lamps on the operator panel do not come on.

1 2 ... 120 121 122 123 124 125 126 127 128 129 130 ... 187 188

LASER PRINTER 1
Continued 3
1. Precautions 6
1.2 Caution for safety 7
1.2.3 Handling Precautions 8
1.3 ESD Precautions 9
ML-3471ND 10
2.1.2.2 Controller & S/W 11
2.1.2.3 Paper Handling 12
2.1.2.4 Consumables 13
2.1.2.6 Environment 13
2.1.2.7 Options 14
2.1.2.8 Others 14
2.1.3 Model Comparison Table 15
2.1.4 Accessory List 15
2.2 System Overview 16
2.2.1.2(a) Feeding Section 17
2.2.1.2(b) Transfer Ass’y 17
Drive Ass'y 18
Duplex Drive Ass'y 18
Connection 18
Duplex Motor 18
2.2.1.2(f) Toner Cartridge 19
2.2.1.2(e) LSU 19
2.21.2(h) Optional Tray (SCF) 20
2.2.1.2(g) Duplex Unit 20
2.2.2.1 Frame 21
2.2.2.2 Feeding Part 21
2.2.2.3 Transfer Ass’y 21
2.2.2.4 Driver Ass’y 22
2.2.2.5 Fixing Part (Fuser) 23
2.2.2.5(e) Pressure Roller 24
2.2.2.7 Toner Cartridge 25
2.2.2.7(c) Supply Roller 26
2.2.2.7(e) CHARGING PORTION 26
2.2.3.1(a) Asic(SPGPv3) 27
2.2.3.1(b) Memory 28
2.2.3.1(c) Others 28
2.2.3.1(d) Flash Memory 29
2.2.3.1(e) SDRAM 29
HVPS PBA 32
2.2.3.3 Engine F/W 35
2.2.4 S/W Descriptions 37
2.2.4.3 Data and Control Flow 38
3. Disassembly and Reassembly 40
Disassembly and Reassembly 41
Cassette 43
Toner Cartridge 43
Front Cover 43
MP Tray Ass'y 44
Tray Link 44
3.5 Rear Cover 45
Fuser Ass'y 46
Thermostat 46
CON Harness 46
REC Harness 46
Input Guide 47
Thermister 47
Fuser Cover 47
Fuser Frame 47
Heat Roller 48
Fuser Gear 48
Top Cover 49
OPE Unit 50
Right Side Cover 51
Left Side Cover 51
DIMM Cover 52
Gear Bracket Ass'y 54
BLDC Motor Ass'y 54
3.12 Duplex Drive Ass'y 55
Insulator Sheet 56
Shield SMPS (With AC Inlet) 56
AC Inlet Connector 56
3.15 Fuser Drive Ass'y 58
3.16 Fan 59
3.19 HVPS Housing 62
3.20 Cover Mid Front 63
3.21 MPF Housing 63
3.22 Feed Roller Parts 64
Feed Shaft 65
Feed1 Gear Ass'y 65
Clutch Unit 65
Feed1 Roller 65
Pick Up Gear Ass'y 66
Pick Up Gear Shaft 66
Feed Solenoid 66
Manual Solenoid 66
CRUM2 PBA 67
Terminal 67
3.27 Transfer Roller Parts 68
4.1 Alignment and Adjustments 69
4.1.2 Control Panel 70
4.1.2.2 System setup 71
ML-3470D ML-3471ND 73
4.1.4.1 Status LED 75
4.1.4.1 Error Message 76
4.1.6 How to use DCU 79
4.1.6.2 Code 80
1) Normal Code 80
2) Error Code 80
4.1.6.3 Self Diagnostic Mode 81
4.1.6.4 Self Test Button 83
4.1.7 Paper Jam 84
4.2 Troubleshooting 91
2) Vertical White Line 93
3) Horizontal Black Band 94
4) Black/White Spot 95
5) Light Image 96
6) Dark Image or a Black Page 97
7) Uneven Density 98
8) Background 99
9) Ghost (1) 100
Service Manual 101
Samsung Electronics 101
10) Ghost (2) 102
11) Ghost (3) : Fuser 103
Digital Printer 104
13) Stains on Back of Page 105
14) Blank Page Print out (1) 106
15) Blank Page Print out (2) 107
1) Wrong Print Position 108
BIN PATH 109
7) Multi-Feeding 114
1) Fuser Error 117
2) LSU Error 118
1. Check the Heat Lamp 119
1. Replace the Fuser 119
2. Replace the Main PBA 119
3. Replace the SMPS 119
4) Paper Empty 120
6) Cover Open 122
8) Defective motor operation 124
9) No Power 125
4.2.5.4(a) Invalid Toner 128
4.2.5.4(b) Low Toner 128
4.2.5.4(c) Replace Cartridge 128
3) Abnormal Printing 134
Contents 136
5.1 Main 137
Main Parts List 138
5.2 Cover Ass'y 139
Cover Ass’y Parts List 140
5.3 Front Cover Ass'y 141
Drawer# SEC_Code Description 142
Location 142
QT'y Service Remark 142
5.4 Rear Cover Ass'y 143
5.5 OPE Cover Ass'y 144
5.6 Frame 145
Frame Parts List 146
5.7 MP Ass'y 149
MP Ass’y Parts List 150
5.8 Main Drive Ass'y 151
Main Drive Parts List 152
5.9 Fuser Drive Ass'y 153
5.10 Duplex Unit (Optional) 154
5.11 Fuser Unit 156
Fuser Unit Parts List 157
5.12 Cassette Unit 159
Cassette Unit Parts List 160
6. System Diagram 161
6.2 Connection Diagram 162
Standard : For general use 163
Acronyms and Abbreviations(2) 165
Antenna connector 166
RJ-45 Jack 166
Active LED(Green) 166
Link LED 166
(Red/Green/Orange) 166
7.5 Sample Tests Patterns 167
7.6.1 Double Feed Error 168
7.6.2 Jam0 169
7.6.3 Jam1 170
Reference Information 171
΄ΥΚΝΝ͑ΡΣΠΓΝΖΞ͑͑ΗΚΩΖΕ͑Ͱ 172
7.6.6 Low Toner 173
7.6.7 Over Heat Error 174
7.6.8 Low Heat Error 175
7.6.9 Fuser Door Open 176
7.6.11 LSU Error 178
7.6.12 Scan Lock Error 179
7.6.14 All black printing 181
7.6.15 Blank Copy 182
7.6.16 Images at 1 Copy 183
Replace Scanning Unit Assy 184
Re- Copying 184
Check if the Scan Glass 184
7.6.18 Document Jam 185
7.8 Model Information 187
7.8.4 F/W Upgrade Method 188

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Samsung ML-3471ND Specifications Page 125

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