Samsung ML-1750 Especificaciones Pagina 39
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SUMMARY OF PRODUCT
Samsung Electronics
Service Manual
4.6.4.3 What is the Q-PID Method?
The Q-PID is developed by Samsung, and it saves the preheating time in half in comparison with the existed
method. It saves not only the printing time for initial print but also it saves the printing speed for the reat-
tempting print after for a while.
4.6.5 LSU
The LSU is consisted of the LD (Laser Diode) and the polygon motor control. When the printing signal occurs,
it turns the LD and drives the polygon motor. When the receiving light part detects the beam, Hsync occurs.
When the polygon motor speed becomes a normal, LReady occurs. If two conditions are satisfied, the sta-
tus bit of the LSU controller register becomes 1 to be judged that the LSU is ready. If two conditions are not
satisfied, the error shown in below occurs.
Toner Toner
Air Layer
Holgen Lamp
Paper
Pressure Roller
Heat Pipe
Heating Wire
Paper
Pressure Roller
• After heating the air layer, transfer the heat to the
surface
• It takes long time to heat it until it reaches the
proper temperature.
• The high temperature is needed when it is stand-
by status.
• The heat conductivity of the heat pipe is
100~150 times higher than cooper’s.
• It is possible to raise the temperature in an
instant
• It saves the dissipation of power in the standby
status due to high accumulation of heat.
Error Description DCU
Polygon motor error When the polygon motor’s speed doesn’t 95
become a normal
Hsync error The polygon motor’s speed is normal, 96
but the Hsync signal is not created.
- 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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