Training (EP) Product Development Group 2 Samsung IT Solutions Business Jan [ML-5510N/ ML-5510ND/ML-6510ND ML-5512ND/ML-6512ND

Contents 1.General Specification 2.Process 3.Troubleshooting

Ⅰ. General Specification Ⅰ. Understanding the general specifications of CRU of SCX-5510/6510 Ⅱ. Comprehension of the feature of major elements Objectives

Overall Spec. Size(WxDxH) Feature Capacity Amounit of Developer/Toner Development Method 340x86x165mm 80K Developer 400g Non Magnetic Two Component type Drum Cartridge Weight(Net)2.57 kg 356x145x125mm 30K Toner 625g Toner Cartridge 1.22kg Ⅰ. General Specification

Drum Cartridge Drum Type Charger Type Charger Roller Cleaner OPC Cleaning type UCL(Under Coated Layer) Urethane Cleaning Roller Developer Roller Φ 25 Magnetic Roller Coated Type Charge Roller Double Blade Cleaning (Rubber Blade) (Main Counter Blade and Sub Trail Blade) Developer Carrier + Toner (400 g) Φ 30 Organic Photo Conductor (OPC) CRUM N-CRUM Type Ⅰ. General Specification

Toner Cartridge Non Magnetic Polymerization Toner Auger Feed Type Toner Type Toner Supply Type N-CRUM Type Waste Toner CRUM Independent Waste Toner Bottle Paddle One Paddles + Film Type Ⅰ. General Specification

Ⅰ. What is the development method of CRU of SCX-5510/6510 Review

Ⅰ. Understanding the basic structures and operating principle of each parts Ⅱ. Studying the printing process and electro-photographic process Ⅲ. Comprehension of System Layout Objectives Ⅱ. Process

LSU PC ORIGINAL DOCUMENT DRIVER CONVERT TO THE PRINTER LANGUAGE ELECTRICAL SIGNAL CONNECTIVITY CONTROLLER CONVERT TO THE BITMAP IMAGE 1.CHARGING 3.DEVELOPMENT 2.EXPOSURE 4.TRANSFER 5.FIXING RECOVERY TO THE ORIGINAL IMAGE LSU Ⅱ. Process

System Layout

Ⅱ. Process Drum Cartridge Layout Mixer Mixing Screw OPC Magnetic Roller Cleaning Roller Charge Roller Auger Sub Cleaning Blade Main Cleaning Blade

Ⅱ. Process Toner Cartridge Layout Toner Feed Auger Paddle A Film

Ⅱ. Process Toner Cartridge, Drum Cartridge, WTB Imaging Unit Toner Cartridge WTB

1. Basic Electro-photographic Process Ⅱ. Process

2. System Specification 2-1. OPC Section  OPC Type : UCL Type (Φ30)  Life : 80K Pages (in accordance with simplex mode)  V0 = -600 (V)  VL = -150 (V)  Process Speed : 381 mm/sec Ⅱ. Process 2-2. Development Section  Development Roller : Magnetic Roller with Sleeve (Φ25)  Development Method : Non magnetic Two Component Type  Carrier(Ferrite Type) + Toner(Non magnetic Pulverized Toner) : 400 g  Vbias = -500 (V)  Speed (vs OPC)  1: 1.6

Ⅱ. Process 3. System Specification 3-3. Mixer Section  Type : Mixer + 2 Mixing Screw Type  High Speed Mixing type  Roll of Mixer : 1) Circulation of Developer 2) Supply Developer to Magnetic Roller 3-4. Charger Section  Type : Charge Roller Type (Φ18)  Cleaning Method : Urethane Cleaning Roller (Contact Type)  MHV : (V)  Pressure Type : Two Spring (End of Roller Shaft)

Ⅱ. Process 3. System Specification 3-5. Toner Cartridge Section  Toner Type : Non Magnetic Polymerization Toner (625 g)  Supply Type : Feed Auger  Supply Method : DC Motor by Pulse control 3-6. CRUM Section  Type : N-CRUM Type  Function : 1) Interface with machine and cartridge 2) Storage (Cartridge Information…etc)

Ⅰ. What is the function of CRUM ? Ⅱ. Do you know life of OPC? Ⅲ. Do you know the toner supply method? Review Ⅱ. Process

Ⅰ. Building ability to deal with various problems raised in the field by reviewing troubleshooting Ⅱ. Check the solution of each problem. Objectives III. Troubleshooting

Periodic Defective Image III. Troubleshooting RollerDiameterBand Period OPC DrumØ mm REGI RollerØ mm Feed RollerØ mm Forward RollerØ mm Pickup RollerØ mm Retard RollerØ mm MP Pick-UpØ mm Heat RollerØ mm Duplex RollerØ mm Cleaning RollerØ mm Transfer RollerØ mm

a. Vertical Black Line and Band Check and Cause 1. Damaged develop roller or Cleaning Blade in the Imaging Unit. - Scratched surface 2. Scratched surface of the OPC in the imaging unit.Solution If causes 1 and 2 occur in the Imaging Unit, replace the Imaging Unit and try to print out. 3. Partly depression or deformation on the surface of the transfer roller. Replace the transfer roller if occurred as No. 3. ▪ Description 1. Straight thin black vertical line occurs during printing. 2. Dark black vertical band occurs during printing. III. Troubleshooting

b. Vertical White Line ▪ Description White vertical voids in the image. Check and Cause Foreign matter stuck onto the window of internal lenses of LSU mirror or Light Path. Foreign matter between the magnetic roller and blade in the imaging unit. In Case the life of the imaging unit has been expired, white line or light image occurred Solution Foreign matter stuck onto the window : Clean the LSU window with recommended cleaner (IPA) Clean the window with a clean cotton swab. It may occur when Burr and foreign substances are on the window of Imaging Unit frame. Remove the foreign matter and burr of the exposure window. If the fuser is defective, voids occur periodically at the top of a black image. Open the front cover and check ribs that corresponds to the position of the voids. Remove if found. Check the life of Imaging Unit replace the Imaging Unit and try to print out. If the problems are not solved, replace the Imaging Unit. If may occur when foreign substances are on the OPC Drum III. Troubleshooting

c. Horizontal Black Band ▪ Description Dark of blurry horizontal stripes occur in the printing periodically. (They may not occur periodically.) Check and Cause Bad contacts of the voltage terminals Between Imaging Unit and Machine.Solution Clean each voltage terminal of the Charge. Develop, OPC Gnd and Transfer roller. (remove the toner particles and paper particles) The rollers of Imaging unit may be stained. OPC Drum = 94.4 mm Charge Roller = 50 Mm Magnetic Roller = 49 mm Transfer Roller = 57.8 mm If the malfunction persists, replace the Imaging Unit or Transfer Roller. III. Troubleshooting

d. Black and White Spot ▪ Description 1. Dark or blurry black spots occur periodically in the printing. 2. White spots occur periodically in the printing. Check and Cause If dark or blurry black spots occur periodically, the rollers in the Imaging Unit may be contaminated with foreign matter or paper particles. ( Charge roller : 50 mm interval, OPC Drum : 94 mm interval )Solution Clean each voltage terminal of the Charge. Supply, Develop and Transfer roller. (remove the toner particles and paper particles) If faded areas or voids occur in a black image at intervals of 94 mm, or black spots occur elsewhere, the OPC drum surface is damaged. In case of 94 mm interval, Cleanly remove foreign substances stuck on the OPC location equivalent to black spots and white spots with a dry duster. If a black image is partially broken, the transfer voltage is abnormal or the transfer roller’s life has expired. The transfer roller guarantees 100,000 sheets printing. the roller’s life is expired, replace it. In case of 50 mm interval, take measures as to replace the Imaging Unit cartridge and try to print out. Clean the inside of the set against the paper particles and foreign matter in order not to cause the trouble. III. Troubleshooting

e. Light Image ▪ Description The printed image is light, with no ghost. Check and Cause Image is looking like low resolution.Solution Check if the Toner Save mode is off. Ambient temperature is below than 10 ℃.Replace the Imaging Unit and try to print out. Toner is not supplied form Toner Cartridge. Check if toner supply motor works normally or not. Replace Toner Cartridge and try to print out the sample page more then 20pages. Abnormal output from the HVPS. Clean up the contaminated area by the toner. Replace the HVPS if the problems are not solved by the above four directions. III. Troubleshooting

f. Dark Image or a black ▪ Description The printed image is dark. Check and Cause Check if the high voltage terminal is contaminated Solution Remove the imaging unit and Clean the high voltage terminal Charge voltage is not turned on due to the bad contacts between power supply in the side of the imaging unit and charge terminal of HVPS. Check the state of the connector which connects the engine board and HVPS. Replace the HVPS if not solved by the above direction 1 and 2. The charging roller is defective.Replace the imaging unit III. Troubleshooting

g. Uneven Density Check and Cause The toner level is not even on the imaging unit roller due to the bad blade. Solution Occur in the imaging unit, replace the imaging unit and try to print out 20 pages. The pressure force on the left and right springs of the transfer roller is not even, the springs are damaged, the transfer roller is improperly installed, or the transfer roller bushing or holder is damaged. Replace both the left and right Spring Holder. ▪ Description Print density is uneven between left and right. III. Troubleshooting

h. Background ▪ Description Light dark background appears in whole area of the printing. Check and Cause Does character exist less than 2% per a page, and hasn’t it been used long time?Solution The toner cartridge is basically designed to print 10,000 sheets with about 5% image. Does recycle paper be used?if using recycle paper, try another paper. Has the life span of the imaging unit ended? Replace the imaging unit when the life span of it has been ended. Is the ambient humidity condition too high ? Recommend temperature rage is between 15 and 25, Humidity is between 30%~60% Is the HVPS normal? Replace the HVPS. If the problem is still not solved, Replace the Imaging Unit III. Troubleshooting

i. Ghost ▪ Description Ghost occurs at 94.4 mm intervals of the OPC drum in the whole printing. Check and Cause Bad contacts caused by contamination from toner particles between high voltage terminal in the main body and the electrode of the Imaging Unit. Solution Clean the terminals when contaminated by toner particles. Bad contacts caused by contamination from toner particles between high voltage terminal in the main body and the one in the HVPS board. Check the Connection between main body and the HVPS board, Replace the engine board or HVPS if not solved The life of Imaging Unit is expired.Replace the Imaging Unit and try to print out. Transfer roller lifetime(100,000 sheets) has expired. Check the transfer roller lifetime and replace it. Abnormal low temperature (below 10 ℃ ). Wait about 1 hour after power on before using printer. Recommend temperature rage is between 15 and 25, Humidity is between 30%~60% III. Troubleshooting

j. Stains on the Face of Page Check and Cause Solution Toner leakage due to improperly sealed Imaging Unit. Replace the Imaging Unit. ▪ Description The background on the face of the printed page is stained. If the transfer roller is contaminated, stains on the face of page will occur. If the transfer roller is contaminated, Print the 2~3 blank pages. There is the developer leakage in the imaging unit Clean the transfer roller and paper path Print out the sample III. Troubleshooting

k. Stains on Back of Page Check and Cause Solution Transfer roller is contaminated. Print the 2~3 blank pages. Replace the transfer roller if contaminated severely. Disassemble the fuser and clean the Heat Roller and Pressure Roller And check the area between Heat Roll and themistor. If contaminated, clean the area not to be deformed. ▪ Description The back of the page is stained at 47 mm intervals. Pressure roller is contaminated. III. Troubleshooting

l. Blank Page Print out Check and Cause Solution Bad ground contacts in OPC and/or imaging unit. Remove contamination of the terminals of the imaging unit and machine. Check the ground path from OPC to machine ▪ Description Blank page is printed. OPC or Developer Motor is not working Check if the motor works normally or not Check the main Board III. Troubleshooting

Thank You !