Samsung ML-1750 Especificaciones Pagina 68
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7-3
Samsung Electronics
TROUBLESHOOTING
Service Manual
7.1.5 Light Image
• Description The printed image is light, with no ghost.
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Check and Cause Solution
1. Develop roller is stained when the toner
of developer cartridge is almost con-
sumed.
2. Ambient temperature is below than 10°C.
3. Bad contact caused by the toner stains
between the high voltage terminal in the
HVPS and the one in the set.
4. Abnormal output from the HVPS.
1. Check if the Toner Save mode is off.
2. R
eplace the developer cartridge and try to
print out.
3. Wait 30 minutes after printer is powered on
before you start printing.
4. Clean up the contaminated area by the
toner.
5. Replace the HVPS if the problems are not
solved by the above four directions.
7.1.6 Dark Image or a Black
• Description The printed image is dark.
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Digital Printer
Check and Cause Solution
1. No charge voltage in the engine board.
( Perform DCU diagnostic code 01)
2. Charge voltage is not turned on due to
the bad contacts between power supply
in the side of the Developer and charge
terminal of HVPS.
1. Clean the high voltage charge terminal.
2. Check the state of the connector which
connects the engine board and HVPS.
3. Replace the HVPS if not solved by the
above direction 1 and 2.
- 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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