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4-6
SUMMARY OF PRODUCT
Samsung Electronics
Service Manual
4.2.1 Feeding Part
There are the universal cassette, which loads papers, and the manual feeder, which supplies paper one by
one. The cassette has the function pad which separates paper one by one, and it has the sensor function
to check the existence of the loading paper.
- Feeding Method: Universal Cassette Type
- Feeding Standard: Center Loading
- Feeding Capacity: Cassette-250 sheets (75g/m©˜, 20lb paper standard)
Manual 1 sheet (Paper, OHP, Envelop, etc.)
- Paper detecting sensor: Photo sensor
- Paper size sensor: None
4.2.2 Transfer Ass’y
It is consisted of the PTL (pre-transfer lamp) and the Transfer Roller. The PTL sends a light to the OPC
drum, makes the current on the drum surface to low, and improves the transfer efficiency.
The transfer roller delivers the toner of the OPC drum to the paper.
- The life span: Print over 60,000 sheets (in 15~30°C)
4.2.3 Driver Ass’y
It is a power delivery unit by gearing. By driving the motor, it supplies the power to the feeding unit, the
fusing unit, and the distributing unit.
4.2.4 Fixing Part(Fuser)
- The fuser is consisted of the Heat Lamp, Heat Roller, Pressure Roller, Thermistor, and Thermostat. It
adheres the toner to the paper with a pressure and a heat to complete the printing job.
- There are two methods, the existing method which use the Heat Lamp and the Q-PID which is developed
by Samsung.
110V : Heat Lamp type Fuser
220V : Heat Lamp type or Q-PID type Fuser
4.2.4.1 Temperature-Intercepting Device (Thermostat)
The thermostat is the temperature-intercepting device, which cuts off the power for preventing an overheat-
ing or a fire when the heat lamp or the heat coil of the heat roller is overheated.
4.2.4.2 Temperature Detecting Sensor (Thermistor)
The Thermistor detects the surface temperature of the heat roller, and it maintains the regular temperature
of the heat roller by responding to the information of the temperature.
4.2.4.3 Heat Roller
The heat roller transfers the temperature from the heat lamp or heat coil to the surface to heat the paper
which passes the surface. The melted toner cannot stain the heat roller coated with Teflon.
The heating elements are heat lamp and heat coil. For this product, Q-PID method with the heat coil is
applied.
4.2.4.4 Pressure roller
The pressure roller mounted right under the heat roller is made of the silicon resin, and the surface of the
roller is coated with Teflon to fuse the toner on the paper when paper passes between the heat roller and
the pressure roller.
- LASER PRINTER 1
- ML-1700 Series 1
- ELECTRONICS 2
- 2003. 02 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
- 2.3.1 A4 5% Pattern 10
- 2.3.2 A4 2% Pattern 11
- 2.3.3 A4 IDC Pattern 12
- REFERENCE INFORMATION 13
- 3. Specifications 14
- 3.3 Electrical Specification 15
- 3.2 Controller Specification 15
- 3-4 Environmental Range 15
- Specifications 16
- 4. Summary of Product 18
- (ML-1750 Only) 19
- 4.1.3 Control Panel 20
- 2) Cancel button 21
- 4.2 System Layout 22
- 4.2.4.3 Heat Roller 23
- 4.2.4.4 Pressure roller 23
- 4.2.4.5 Safety Relevant Facts 24
- 4.2.6 Toner Cartridge 25
- 4.3 Main PBA(SPL Model) 26
- •Main function block 27
- 1) Paper Empty Sensing 27
- 2) MP Sensing 27
- 4) Paper Exit Sensing 28
- 5) Cover Open Sensing 28
- 6) DC FAN / SOLENOID Driving 28
- 7) Motor Driving 28
- 4.4 Main PBA (PCL Model) 29
- SUMMARY OF PRODUCT 30
- 4.4.1 Asic(SPGPm) 31
- 4.4.2 Memory 31
- SPGPm Internal Block Diagram 32
- 4.5 SMPS & HVPS 33
- 2) Charge Voltage (MHV) 34
- 3)Cleaning Voltage (THV-) 34
- 5) Supply Voltage(SUP) 34
- 1) AC Input 35
- 2) Rated Power Output 35
- 3) Consumption Power 35
- 4) Length of Power Cord : 35
- 5) Power Switch : 35
- 4.5.3 Fuser AC Power Control 36
- 4.6.1.1 Jam 0 37
- 4.6.1.2 Jam 1 37
- 4.6.1.3 Jam 2 37
- 4.6.4.1 Heat Lamp Method 38
- 4.6.4.2 Q-PID Method 38
- 4.6.5 LSU 39
- 5. Disassembly and Reassembly 40
- Cassette 41
- Top Cover 41
- Rear Cover 41
- Front Cover 41
- 5.3 Fuser 42
- Fuser Ass’y 43
- Idle Gear 43
- Thermostat 43
- Thermister Harness 44
- Thermister 44
- 5.4 Exit Roller 45
- Drive Ass'y 46
- Main PBA 47
- Inlet Bracket 48
- 5.11 Transfer Roller 49
- Guide paper 50
- Disassembly and Reassembly 51
- 6. Alignment and Adjustments 52
- 6.1.2 Code 53
- 6.1.3 Self Diagnostic Mode 54
- ALIGNMENT & ADJUSTMENTS 55
- 6.1.4 Self Test Button 56
- 6.2 Paper Path 57
- 6.3 Clearing Paper Jams 58
- 6.3.2 In the Paper Feed Area 59
- Service 60
- 6.4 Sample Pattern 61
- 6.7 Periodic Defective Image 64
- 7. Troubleshooting 66
- 7.1.3 Horizontal Black Band 67
- 7.1.4 Black/White Spot 67
- 7.1.5 Light Image 68
- 7.1.6 Dark Image or a Black 68
- Digital Printer 69
- 7.1.9 Ghost (1) 70
- 7.1.10 Ghost (2) 70
- 7.1.11 Ghost (3) 71
- 7.1.12 Ghost (4) 71
- 7.2 bad discharge 73
- 7.2.3 JAM 1 74
- 7.2.4 JAM 2 74
- 7.2.5 Multi-Feeding 75
- TROUBLESHOOTING 76
- 7.3 Malfunction 77
- 7.3.4 Paper Empty 78
- 7.3.6 Cover Open 79
- 7.3.9 No Power 80
- 7.4 Toner Cartridge Service 82
- 7.5.3 Abnormal Printing 87
- 7.5.4 SPOOL Error 88
- 8.1 Main Assembly 90
- Main Assembly Parts List 91
- 8.2 Frame Unit Assembly 92
- 8.3 Drive Unit Assembly 95
- 8.5 Fuser Unit Assembly 98
- Samsung Electronics 100
- Service Manual 100
- 9. Block Diagram 101
- 9.2 SPL Model 102
- 10. Connection Diagram 103
- 10.2 SPL Model 104
- SCHEMATIC DIAGRAMS 105
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