Samsung ML-3471ND Especificaciones Pagina 30
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Product specification and feature
Service Manual
2-21
Samsung Electronics
DC FAN / SOLENOID Driving
It is driven by transistor and controlled by D14(FAN MAIN), E16(FAN DUPLEX), C23(PICK-UP CLUTCH), C18(REGI
CLUTCH), D15(MPF CLUTCH) of CPU.
When it is high, the fan is driving by turning on the TR, and it is off when the sleep mode is selected. There are three
solenoids, and they are driven by paper pick-up, regi and MPF signal. It is turned on or off by C23, C18, D15 of CPU. The
diode protects the driving TR from the noise pulse, which is flown when the solenoid id de-energizing.
FAN Driving Circuit is driven by Transistor, and controlled by D14, E16 of CPU.
Motor Driving
The main motor driving circuits is on the BLDC Motor Ass y Unit. Main Controller has the interfacing circuits. There is
motor driver IC on the motor control board of Motor Ass y Unit.
The exit motor driving circuits is formed when the driver IC is selected. The AN44060A Motor Driver IC is used in this
case. The resistance Rs value for sensing and voltage value for the V reference can be changed by motor driving voltage
value. The motor driving voltage is calculated with the following formula.
The motor driving circuit is formed when the Driver IC is selected. The A3977 Motor Driver IC is used in this case. The
resistance Rs value for sensing and voltage value for the V reference can be changed by motor driving voltage value. The
motor driving voltage is calculated with the following formula.
I = Vref / Rs, wherein Vref is (R1 5V) / (R1+R2).
IN 0, 2 IN 1, 3 Output Current
L L Vref / (10*Rs) = Iout
H L Vref / (15*Rs) = Iout * 2/3
L H Vref / (30*Rs) = Iout * 1/3
HH0
- 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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