Samsung ML-2015/XEV 4.5 Periodic Defective Image

Alignment and Adjustments

Samsung Electronics Service Manual

4-5

BIN PATH

OPC Drum

Charge Roller

Supply Roller

Developing Roller

Transfer Roller

Heat Roller

Pressure Roller

4.5 Periodic Defective Image

If the delinquent image regularly occurs in the printed-paper, it is due to delinquent or damaged roller.

Refer to the table in below and check the condition of the roller.

No Roller Defective image Typical defect

1 OPC Drum 75.5mm white spot on black image or black spot

2 Charge Roller 37.7mm black spot

3 Supply Roller 47.5mm light or dark horizontal image band

4 Developing Roller 35.2mm horizontal image band

5 Transfer Roller 46.2mm image ghost

6 Heat Roller 63.9mm Black spot and image ghost

7 Pressure Roller 75.4mm black spot on the backside

Contents

Main LASER PRINTER SERVICE ML-2010 Series ML-2010 ML-2015/XEV Page Contents Continued Page 1. Precautions 1.1 Safety Warning 1.2 Safety Caution 1.2.1 Noxious Material Precaution 1.2.2 Electric Shock or fire Precaution 1.2.3 Handling Precautions 1.2.4 Assembly/Disassembly precaution 1.3 ESD Precautions 2.2 Specifications Product Specifications are subject to change without notice. See below for product specifications. 2.2.1 General Specifications 2. Product Specifications 2.1 Product Overview 2.2.2 Controller 2.2.3 Electrical Specification 2.2.4 Environmental Range 2.2.5 Toner Cartridge 2.2.6 Paper Handling Specifications Please refer to Paper Secifications on user Guide. 2.2.6.4 Duplex Printing 2.2.6.3 Output capacity 2.2.6.1 Input Paper Size 2.3 Model Comparison Table ML-1610 Series ML-2010 Series Remark 3. System Overview 3.1 System Outline Paper Path Layout Unit Layout 3.1.1 Feeding 3.1.2 Transfer Assy 3.1.3 Driver Assy 3.1.4 FUSER Page 3.1.5 LSU (Laser Scanner Unit) 3.1.6 Toner Cartridge 3.2 H/W Structure and Descriptions 3.2.1 H/W Overview 3.2.1.1. Main Control 3.2.1.2 CPU 3.2.1.3 Flash Memory 3.2.1.4 DRAM 3.2.1.5 ENGINE System Overview 3-9 3.2.2 Main Board Page 3.2.3 Asic(SPGPm) Specification 3.2.3.1 Introduction Page System Overview 3-13 3.2.3.2 Jupiter4E Internal Block Diagram H P H 3.2.4 Sensor Controller 3.2.4.1 Paper Feeding/Width 3.2.4.2 Paper Empty Sensing 3.2.4.3 Jam Cover/Cover Open Sensing 3.2.4.4 Solenoid Driving Circuit 3.2.5 SMPS board (Switching Module Power Supply) Pin Signal Page 3.2.6 HVPS board (High Voltage Power Supply) Input 3.2.7 FUSER AC POWER CONTROL 3.3 S/W Structure and Descriptions 3.3.1 Introduction 3.3.2 Engine Control F/W Overview Page 3.3.3 F/W Architecture of Engine Control Firmware 3.3.4 Engine Interface Module Design 3.3.5 Engine Sensing & Unit Control Module Design Page 3.3.6 LED Behaviors 3.3.7 Error LED Operation Page Page Page 3.4.3 Loading Paper 3.4.4 Connecting a Printer Cable Page 3.4.7 Installing Printer Software 4-1 4. Alignment and Adjustments 4.1 Sample Pattern 4.1.1 Printing a Demo Page 2) The Demo page or the configuration sheet shows the printers current configuration. ML-20XX Series 4.2 Control Panel 4.2.1 OP Panel 4.2.3 Cancel button 4.3 Consumables and Replacement Parts 4.4 LED Status Error Message 4.5 Periodic Defective Image 4-6 4.6 How to use DCU ERROR STATUS CODE STATUS ML SERIES DIAGNOSTIC CONTROL UNIT SELF TEST DIAGNOSTIC DIAGNOSTIC CODE STATUS CODE DIAGNOSTIC MODE 4.6.2 Code 1) Normal Code 2) Error Code 4.6.3 Self Diagnostic Mode Page 4-10 4.6.4 Self Test Button 4.7 Paper Path 4.7.1 Clearing Paper Jams 4.7.2 In the Paper Exit Area Page Page Page 4.7.5 Tips for Avoiding Paper Jams 4.7.6 Solving Print Quality Problems 5. Disassembly and Reassembly 5.1 General Precautions on Disassembly Whenever servicing the machine, you must perform as follows: Releasing Plastic Latches 5.2 Disassembly and Reassembly 5.2.1 Front Cover Page 5.2.4 SMPS Cover 5.2.3 Cassette Tray 5.2.5 Main Cover 5.2.6 Top Cover 5.2.7 HVPS 5.2.8 RX Drive 5.2.9 Fuser Page 5.2.10 Engine Shield (Including Main PBA and SMPS) 5.2.11 LSU 5.2.12 Paper Path Frame 5.2.13 Pick_Up Roller 6. Troubleshooting 6.1 Checking Symptoms 6.1.1 Basic Check List 6.1.2 Initial Inspection 6.2.2 JAM 0 6.2 Bad discharge 6.2.1 Wrong Print Position 6.2.3 JAM 1 6.2.4 JAM 2 6.2.5 Multi-Feeding 6.2.6 Paper rolled in the Fuser 6.2.7 Paper rolled in the Toner Cartridge (OPC Drum) 6.3 Malfunction 6.3.1 All LEDs blinking (Fuser Error) 6.3.2 All LEDs blinking (Scan Error) 6.3.3 Not function of the gear of the fuser due to melting away 6.3.4 Paper Empty 6.3.5 Paper Empty without indication 6.3.6 Cover Open 6.3.7 No lamp on when the cover is open 6.3.8 Defective motor operation 6.3.9 No Power 6.3.10 Vertical Line Getting Curved 6.4 Bad Software Environment 6.4.1 The printer is not working (1) 6.4.2 The printer is not working (2) 6.4.3 Abnormal Printing 6.4.4 SPOOL Error 6.5 Bad image 6.5.1 Vertical Black Line and Band 6.5.2 Vertical White Line 6.5.3 Horizontal Black Band 6.5.4 Black/White Spot 6.5.5 Light Image 6.5.6 Dark Image or a Black 6.5.7 Uneven Density 6.5.8 Background Page Page 6.5.14 Stains on Back of Page 6.5.15 Blank Page Print out (1) 6.5.16 Blank Page Print out (2) Page 7.1 Main Assembly 7.2 Frame Assembly 7.3 Fuser Unit 7.4 Paper Path Unit Page Basic Parts List Page Page Page Page Page Block diagram 8-1 8. Block Diagram DRIVER SOL. FUSER 1.1 8.2 ML-2015(20ppm GDI P1284) H/W Block Diagram DRIVER FUSER SOL. 1.1 9. Connection Diagram SMPS B S 4 Page Page Page Page Page Page Page Page Page Page 11. Reference Information 11.1 Troubleshooting Tool 11.2 Acronyms and Abbreviations(1) Acronyms and Abbreviations(2) 11.3 Selecting printer locations Page Circuit Description 12-1 12. Circuit Description PC1 H N CN1 Page 12.1.2 PWM Controller 12.1.3 Motor Driver 12.1.4 LSU Controller Circuit Description 12-5 lsuSfr LSUC DAC PD THER THV ADC PI Control Block APB BRIDGE 12.1.5 ADC Controller