Samsung SCX-4720F, Service Manual

Page 1: ...DIGITAL LASER MFP CONTENTS 1 Precautions 2 Reference Information 3 Specifications 4 Summary of product 5 Disassembly and Reassembly 6 Alignment and Adjustments 7 Troubleshooting 8 Exploded Views and P...

Page 2: ...ny human access to laser radiation above a Class I level during normal operation user maintenance or prescribed service condition Warning Never operate or service the printer with the protective cover...

Page 3: ...or removing the power connector The power connector must be inserted com pletely otherwise a poor contact could cause overheating possibly leading to a fire When removing the power connector grip it...

Page 4: ...ry out the following procedures before dismantling the printer or replacing any parts 1 Check the contents of the machine memory and make a note of any user settings These will be erased if the mainbo...

Page 5: ...you can get harm 3 When you move the printer This printer weighs 15 6kg including toner cartridge and cassette Use safe lifting and handling techniques Use the lifting handles located on each side of...

Page 6: ...trical charges sufficient to damage ESDs 5 Do not use Freon propelled chemicals When sprayed these can generate electrical charges sufficient to dam age ESDs 6 Do not remove a replacement ESD from its...

Page 7: ...ooting The following tools are recommended safe and easy troubleshooting as described in this service manual DVM Digital Volt Meter Standard Indicates more than 3 digits Driver Standard type type M3 l...

Page 8: ...COT First Copy Out Time F W firmware GDI graphics device interface GND ground HBP Host Based Printing HDD Hard Disk Drive HV high voltage HVPS High Voltage Power Supply I F interface I O Input and Out...

Page 9: ...The Sample Pattern for the Test The sample pattern shown in below is the standard pattern used in the factory The life of the toner cartridge and the printing speed are measured using the pattern show...

Page 10: ...Service Manual Reference Information 2 4 Samsung Electronics 2 3 2 A4 2 Pattern...

Page 11: ...Reference Information Samsung Electronics Service Manual 2 5 2 3 3 A4 IDC 5 Patten...

Page 12: ...Service Manual Reference Information 2 6 Samsung Electronics 2 3 4 A4 ISO 19752 Standard Pattern This test page is reproduced at 70 of the normal A4 size...

Page 13: ...d mark of Wi FiTM The Wi FiTM is a registered trademark of WECA Wireless Ethernet Compatibility Alliance Over 50 of a wireless LAN companies are member of it The most of main wireless networking compa...

Page 14: ...Service Manual Reference Information 2 8 Samsung Electronics MEMO...

Page 15: ...14 8kg Gross Weight with package 20 4kg LCD 16 2 Char I O Interface USB2 0 High Speed MPU SPGPm 166MHz Power Consumption Printing Operation 370W Sleep Mode 30 W Energy Star Compliant Power Switch Yes...

Page 16: ...ating 10 90 Altitude Max 8 200ft EMI Approval Class B Device Memory Standard Max 32MB 160MB Std Max 12MB PS 4MB FAX 2MB System 2MB Scan 20MB Type SDRAM Expand Memory Slot Type SDRAM DIMM Option DIMM 1...

Page 17: ...YES Font Type 45 Scalable 1 Bitmap Number N A Power Save Yes 5 10 15 30 45min Resolution Normal 600x600dpi RET Yes 1200x1200dpi Toner Save Yes No dedicated button on CP Memory 16MB FPOT From Stand by...

Page 18: ...x 75sec USB 1 1 Color Approx 150sec USB 1 1 75dpi 300dpi Resolution Optical 600 1200dpi Enhanced 4800dpi 4800dpi Halftone 256level Scan Size Max Document Max 216mm 8 5 Width Effective Max 208mm 8 2inc...

Page 19: ...1 99 Preset Yes Darkness Control 3 level by LED Copy Mode Quality Text Mixed Photo Collation Copy 600x300dpi Yes Auto return to default mode Yes Time can be changeable 15 30 60 180sec Off Changeable...

Page 20: ...No Selectable in Technical Mode Pause No Yes Auto Redial No Yes Last Number Redial No Yes Distinctive Ring No Yes Caller ID No No External Phone Interface No Yes Report Tx Rx Journal No Yes List Prin...

Page 21: ...LTR Rx fax duplex print out No No Multiple page scan speed No 14ppm LTR Std mode Receive Mode No Fax TEL Ans Fax DRPD Memory Capacity No 4MB Optional Memory No No Max locations No 199 locations to sto...

Page 22: ...Tray 16 24 lb Bypass 16 43 lb Paper Path Standard output Bottom to Middle Front FIFO Straight Through Face up Single Sheet Paper Size Max 216 x 356mm 8 5 x14 Min 76 x 127mm 3 x5 ADF Paper Weight 12 5...

Page 23: ...L6 PCL5e Std PostScript Level3 Std TWAIN Yes WIA Yes RCP Yes PC FAX Yes through PC modem and Fax S W Consumables Type One Piece Type How to install Front door open and front loading Toner Life Initial...

Page 24: ...Service Manual Specifications 3 10 Samsung Electronics MEMO...

Page 25: ...mary of Product Service Manual 4 1 Samsung Electronics 4 4 4 Summary of Product This chapter describes the functions and operating principal of the main components 4 1 Printer Components 4 1 1 Front V...

Page 26: ...lied with the machine It is an option that must be purchased and installed separately Option Function The network port is not fitted as standard on the machine You can purchase an optional Network Car...

Page 27: ...Summary of Product Service Manual 4 3 Samsung Electronics 4 1 3 Control Panel SCX 4720F...

Page 28: ...Service Manual Summary of Product 4 4 Samsung Electronics...

Page 29: ...ty provided with this machine Also allows you to scan and save documents in a USB flash drive and manage it when it is inserted into the USB port of your machine See User Guide Chapter 10 Installing a...

Page 30: ...arts a job 5 Selects the number of copies Allows you to use special copy features such as Clone Collation Auto Fit 2Sides on 1pg 2 4 Up multiple pages on a sheet and Poster copying Makes a copy smalle...

Page 31: ...ines a light onto the OPC drum This lowers the charge on the drum s surface and improves transfer efficiency The transfer roller transfers toner from the OPC drum surface to the paper Life expectancy...

Page 32: ...s than 80 C to protect the user and a caution label is attached where the customer can see it easily when the rear cover is opened 4 2 5 Scanner This image is read using a photosensitive sensor It con...

Page 33: ...laser light A rotating polygon mirror reflects the laser light onto the OPC and each side of the mirror is one scan line The OPC drum turns as the paper feeds to scan the image down the page The HSYNC...

Page 34: ...oping roller and blade Doctor blade Developing Method Non magnetic 1 element contacting method Toner Non magnetic 1 element shatter type toner The life span of toner 3 000 sheets IDC Pattern A4 standa...

Page 35: ...RY CODE LOW 29LV160DB U30 14 CMOS LOGIC 74HCT273 U58 24 MODEM X TAL 28 224MHz OSC6 5 FLASH MEMORY P CL6 HIGH 29LV160DB U24 15 CMOS LOGIC 74HCT273 U59 25 USB HOS T X TAL 6MHz OSC9 6 FLASH MEMORY P CL6...

Page 36: ...ogram and to control whole system Main function block Completely Integrated System for Embedded Applications 32 Bit Risc Architecture Efficient and Powerful ARM9 Core LSU Interface Module for Interfac...

Page 37: ...Program by PC INTERFACE FAX for Journal List and Memory for One Touch Dial Speed Dial List size 4M Byte Access Time 70 nsec 4 3 4 SDRAM SDRAM is used as Swath Buffer in Printing Scan Buffer in Scanni...

Page 38: ...ects that paper exits cleanly from the Machine using an exit sensor CON2 24 on the engine board and actuator on the frame The monitors signal P_EXIT and detects the on off time of the exit sensor and...

Page 39: ...12V and 24V supplies to the main and other PBAs The HVPS creates the high voltage of THV MHV Supply Dev and supplies it to the toner cartridge The CPU is used to modify some of these voltage settings...

Page 40: ...SU Laser Scanning Unit When printing the exposed voltage on the OPC is 180V unexposed is 900 1000V and the exposing voltage on the DEV is 430V Therefore toner with polarity is developed onto an expose...

Page 41: ...luctuating range AC 198V 264V AC 90V 135V AC 198V 264V Rated Frequency 50 60 Hz Frequency Fluctuating range 47 63 Hz Input Current Under 5 0Arms 2 5Arms When the fuser lamp is off and input output vol...

Page 42: ...ated using AC power The AC power is controlled by a Triac THY1 a semiconductor switch On Off control is achieved when the gate of the Triac is turned on off by a Photo triac PC1 this is an insulting p...

Page 43: ...paper passes the feed sensor the trailing edge of the paper does not pass the feed sensor within certain time During this time the feed sensor cannot be Off After the leading edge of the paper passes...

Page 44: ...sing The temperature of the heat roller s surface is detected according to the resistance value of the thermistor The thermistor resistance is measured using the A D converter and thus the CPU can det...

Page 45: ...e to be used in conjunction with the USB Direct printing and Scan to USB functions 4 6 OPE PBA The OPE board consists of various function keys and an LCD to display set status and operator messages A...

Page 46: ...rface Unit LIU V 34 Half Duplex Mode V 90 PCM V 34 Duplex Data Modes V24 Interface FM336 Modem Crystal OR Oscillator Line Interface telephone line TIP RING Optional Eye Pattern Generator Speaker Ampli...

Page 47: ...to the impedance of the receiving telephone line and a circuit to isolate the fax machine from the PSTN and a surge absorber to protect against lighting strike surges on the incoming line The Telephon...

Page 48: ...dular Plug RJ 11C Arr1 Arr2 and Arr3 are protection components to prevent damage due to overvoltage surges e g lightening 4 8 4 Transformer Circuit The Transformer circuit is a line impedance matching...

Page 49: ...ent 20mA 100mA Pseudo Ring Sound Ring frequency 750Hz 1020Hz Ring Interrupt period Mark Space controlled by CPU Modem 4 8 6 Off Hook State DC Resistance DP Dial Mode DC 30mA 50 220 DTMF Dial Mode DC 2...

Page 50: ...of Product 4 26 Samsung Electronics 4 8 7 Signal Input Signal Level Range 0dBm 48dBm DP Dial Pulse Dial Make Brake Ratio 40 60 Pulse Speed 10 0 8 pps Minimum Pause above 60 msec DTMF Signal Coding For...

Page 51: ...Summary of Product Service Manual 4 27 Samsung Electronics MEMO...

Page 52: ...outing that will be affected Whenever servicing the machine you must perform as follows 1 Check to verify that documents are not stored in memory 2 Be sure to remove the toner cartridge before you dis...

Page 53: ...cs 5 2 Rear Cover 1 Remove the four screws securing the Rear Cover 2 Remove the Rear Cover from the Frame Ass y and Scanner Ass y 3 Unclip the Face Up Cover from the Rear cover as shown below Then lif...

Page 54: ...ee page 5 2 2 Take out the Cassette 3 Open the front cover and remove 2 screws on the front and 1 screw on the back Release 3 clips under neath ease the rear screw bracket over its locating pin and pu...

Page 55: ...nual Precautions 5 4 Samsung Electronics 5 4 Front Cover 1 Open the Front Cover 2 Remove the Toner Cartridge 3 Unclip the Front Cover from the Frame Ass y Then remove the Front Cover as shown below Fr...

Page 56: ...5 3 2 Remove the 2 screws securing the Scanner Ass y as shown below 3 Remove the 5 connectors and the ground wire screw from the main PBA as shown below 4 Pull up the Scanner Ass y as shown below 5 SC...

Page 57: ...the frame 7 Lift the front part of the COVER OPE FRONT to release the hook connecting the cover with the scan assembly SCX 4520 SCX 4720F 8 Release the 3 clips on the front of the OPE unit and remove...

Page 58: ...ss y by releasing 2 clips on each side then pull the Scan Upper upward and remove it 11 Remove the CCD Cable as shown below 12 Pull up the CCD Shaft and take out the Scanner Module 13 Squeeze the spri...

Page 59: ...sible as shown on the right Caution 14 Remove the Reduction Gear and Idle Gear as shown below Caution Reassembling Scanner Module 1 When re fitting the scanner belt and belt spring take care to reloca...

Page 60: ...ectronics 15 Remove the 3 screws and take out the Motor Bracket 16 Unplug the connector from the Open Sensor Ass y 17 Unlatch the Open Sensor and remove it as shown below 18 Remove the CCD lock Open S...

Page 61: ...en working on the ADF Motor Ass y take care not to contaminate any of the rubber surfaces with grease 4 Release the Bush and rotate it until it reaches the slot as shown below Then lift the Pick Up As...

Page 62: ...he ADF Motor Ass y Note It is not necessary to disassemble the ADF unit in order to change the ADF separator pad Simply open the ADF cover and remove the Pickup Ass y step 4 page 5 10 Then using a pai...

Page 63: ...PE Unit you should remove Rear Cover see page 5 2 Side Cover LH RH see page 5 3 Scanner Ass y see page 5 5 2 Remove the 7 screws securing the OPE PBA from to the OPE Cover 3 Remove the Contact Rubber...

Page 64: ...Unit you should remove Rear Cover see page 5 2 Side Cover LH RH see page 5 3 Scanner Ass y see page 5 5 2 Remove the 10 screws securing the OPE PBA from to the OPE Cover 3 Remove the Contact Rubber f...

Page 65: ...LH RH see page 5 3 Scanner Ass y see page 5 5 2 Remove the 4 screws securing the Middle Cover and remove it 3 Remove 2 screws securing the Controller Shield Ass y to the Middle Cover Unclip the Middl...

Page 66: ...e connectors and the 5 screws con necting the Controller Shield Assembly to the Middle Cover and frame and remove the assembly 3 If fitted remove the 2 screws connecting the NIC card to the Controller...

Page 67: ...2 Unplug the Exit AC and Fan connectors Unplug the LIU connector if fitted 3 Remove the 11 screws securing the Engine Shield Ass y and tilt to one side Then unplug the all the HVPS SMPS harness before...

Page 68: ...e 5 3 Scanner Ass y see page 5 5 Engine Shield Ass y see page 5 16 2 Remove the 2 screws securing the Inlet Bracket and remove it 3 Remove the one screw securing the Engine Shield ground wire 4 Remove...

Page 69: ...rews securing the Fuser Ass y and remove it 3 Remove the 2 bolts securing the Thermostat Then lift the Thermostat out taking care not to loose the 2 nuts 4 Remove the 2 screws securing the Halogen Lam...

Page 70: ...w 7 Remove the one screw securing the Thermister and remove it as shown below Thermistor Thermistor 5 13 Fan 1 Before you remove the Fan you should remove Rear Cover see page 5 2 Side Cover RH see pag...

Page 71: ...Remove the 4 screws securing the LSU and remove it 3 Unplug the two connectors 5 14 LSU 1 Before you remove the CRUM Board you should remove Rear Cover see page 5 2 Side Cover LH RH see page 5 3 Scann...

Page 72: ...rs stamped into the Drive Ass y base plate When refitting the Drive Ass y tighten the screws the order they are numbered Only screw s numbered 1 to 5 are fitted at this stage Screw 6 is fitted when th...

Page 73: ...5 20 Cover Mid Front see page 5 22 2 Remove the 3 screws securing the Transfer Earth and remove it 3 Unplug the PTL Holder connector then remove the PTL Holder and PTL Lens as shown below 4 Remove th...

Page 74: ...iddle Cover see page 5 14 Controller Shield Ass y see page 5 15 Drive Ass y see page 5 20 2 Remove the 4 screws securing the Guide Paper Front and remove it 3 Remove the screws on the right and left s...

Page 75: ...Service Manual Precautions 5 24 Samsung Electronics 6 Remove the Feed Gear1 Ass y 7 Pull up the Feed Roller and Feed Roller1 Feed Gear1 Ass y Feed Roller Feed Roller1...

Page 76: ...Up Gear Ass y 3 Take out the Pick Up Ass y as shown below 4 Remove the 2 screws securing the Manual Solenoid and Pick Up Solenoid Then remove Manual Solenoid and Pick Up Solenoid 5 To replace the pic...

Page 77: ...ble 3 Slide the white collar as far to the side as possible 4 Slide the Pickup Roller as far as possible to the side until it is free from the white collar on the other end 5 Rotate the Pickup Roller...

Page 78: ...rns Much of this chapter is also included in the user s guide 6 1 Paper path Scanner Part PTL PIC K R PR CR DR SR TR FR OPC L S U Fuser Toner Cartridge 1 2 3 4 5 6 8 7 Sensor Doc Sensor Doc Sensor Doc...

Page 79: ...in a certain time 4 The paper then passes through the paper exit sensor and out of the set Jam 2 occurs if the trailing edge of the paper does not pass the exit sensor within a certain time of the pap...

Page 80: ...chanism causing print quality problems or possibly electrical shock Sensor Doc Sensor Doc ADF Roller Pickup Roller Exit Roller Doc Paper 30Sheets ADF Idle Roller Sensor Regi Feed Roller White Sheet Wh...

Page 81: ...he ADF Automatic Document Feeder DOCUMENT JAM appears on the display 6 2 1 1 ADF Input Misfeed 1 Open the ADF top cover 2 Pull the document gently to the right and out of the ADF 3 Close the ADF top c...

Page 82: ...from the ADF or the feed area by carefully pulling it towards the right by using both hands 3 Close the document cover Then load the documents back into the ADF 6 2 1 2 ADF Exit Misfeed 1 Open the do...

Page 83: ...ot exit continue to Step 2 2 Pull the paper tray open 3 Remove the jammed paper by gently pulling it straight out If there is any resistance and the paper does not move when you pull or if you cannot...

Page 84: ...the Toner Cartridge Area NOTE The fuser area is hot Be careful when removing paper from the machine 1 Open the front cover and remove the toner cartridge 2 Remove the jammed paper by gently pulling it...

Page 85: ...he machine If the paper does not exit continue to Step 2 2 Gently pull the paper out of the front output tray 3 If there is any resistance when you pull the paper or the paper is not seen in the front...

Page 86: ...m appears on the display when you try to print using the manual feeder and the machine does not detect paper due to no paper or improper paper loading The error message may also occur when the paper i...

Page 87: ...tup Change Default Timeout 6 Reports System Data 8 Machine Setup Language Power Save CCD Power Save USB Mode 9 Maintenance Clean Drum Clear Memory 6 3 User Mode SCX 4520 The table below shows the map...

Page 88: ...Toll Save Junk Fax Setup Secure Receive Prefix Dial No Stamp RCV Name ECM Mode 6 Reports Phone Book Send Report RCV Report System Data Scheduled Jobs Tx Confirm Junk Fax List 7 Sound Volume Speaker R...

Page 89: ...perform various tests to help with failure diagnosis When in Tech mode the machine still performs all normal operations While in Tech mode the machine still performs all normal operations To enter th...

Page 90: ...lect the rate between 5 and 10 CLEAR ALL MEMORY The function resets the system to factory default settings This function is used to reset the system to the initial value when the product is functionin...

Page 91: ...upgrade Ensure you save ALL of these files in the same folder 2 At the DOS prompt enter the correct command as shown below and push the enter key Then the upgrade will automatically take place 3 Ther...

Page 92: ...eature to test the machine s ROM The result and the software version appear in the LCD display FLASH VER 1 00 V ENGINE VER 1 00V PATTERN TEST Using this pattern printout you can check that the printer...

Page 93: ...OTOCOL LIST This list shows the sequence of the CCITT group 3 T 30 protocol during the most recent sending or receiving operation Use this list to check for send and receive errors If SYSTEM DATA This...

Page 94: ...st 1 On 2 Off next test selected 1 1 LSU Motor Test 1 On 2 Off next test selected 2 LSU Hsync Test 1 On 2 Off next test selected 3 LD Test 1 On 2 Off next test selected 2 1 Feed Sensor Test 1 Check re...

Page 95: ...ts and Laser Ready is displayed if Laser Leady On Off the motor spins at the correct speed otherwise Laser Error is displayed 13 LD Test Diode On is displayed when the laser diode is on Diode On Off O...

Page 96: ...ounters The time the machine was first used is also displayed These settings are remembered after memory delete Clear All Memory Method Press MENU 1 9 3 in sequence The Firmware version is displayed o...

Page 97: ...r maintenance purposes and is for reference only Environmental conditions temperature humidity dust etc and actual use can cause these figures to vary COMPONENT REPLACEMENT CYCLE ADF Rubber 20 000 Pag...

Page 98: ...image period Kind of abnormal image 1 OPC Drum 75 5mm White spot Block spot 2 Charge Roller 37 7mm Black spot 3 Supply Roller 44 9mm Horizontal density band 4 Develop Roller 35 2mm Horizontal density...

Page 99: ...eaning There is a problem in the fuser unit Solution Check thermostat thermister contact point Heating Lamp Over Heat Meaning The printer has overheated Solution Your unit will automatically return to...

Page 100: ...o make sure a fax can be received No Not Assigned Only SCX 4720F Meaning YThe speed dial location you tried to use has no number assigned to it Solution Dial the number manually using the number keypa...

Page 101: ...ine does not have enough memory space to complete the operation you are attempting Solution Reconfirm the remote machine s features Jam 1 or No Cartridge Meaning Paper has jammed in the paper exit are...

Page 102: ...heck and Cause Solution 1 Check the Solenoid by using Tech Mode 2 Check cassette MP knock up plate and springs 3 Check paper separator pad 4 Check the pick up roller for contamination and correct asse...

Page 103: ...ated with toner 1 Check if the exit sensor actuator is defective Check if the actuator exit is deformed Check if the lever part is deformed Check whether burrs occur in the assembly part of the exit a...

Page 104: ...ber with a soft cloth dampened with IPA Isopropyl Alcohol or water 4 Use paper with a smother surface finish 7 1 6 Paper rolled in the fuser Description Paper rolled around fuser rollers or Concertina...

Page 105: ...set taking care not to touch the green surface Use the gearwheel at the side to rotate the OPC drum and pull the paper from the cassette Clean fingerprints on the OPC gently with soft tissue taking ca...

Page 106: ...ain after clearing the memory 2 If re connecting the harness does not correct the fault replace the OPE Ass y and the main Board in sequence 7 2 2 Defective OPE Keypad Description Pressing keys does n...

Page 107: ...in the LCD panel even when paper is loaded in the cassette Check and Cause Solution 1 Deformed paper sensor actuator or faulty sensor 2 SMPS PBA or Main PBA is defective 3 Faulty cables or connectors...

Page 108: ...ion Check and replace switch if necessary 2 Replace the Main Control board or Cover Open S W as necessary 7 2 6 Cover Open Description The Cover Open message appears on the LCD even when the print cov...

Page 109: ...n 1 The main motor harness or Motor PCB may be faulty 1 Check the motor harnesses and connectors replace if defective If the problem persists replace the main PBA Note Check motor operation using EDC...

Page 110: ...1 1 Contamination of the window or internal lenses of LSU mirror 2 Foreign object inside the toner cartridge or low toner 3 Foreign object contamination or burr on the edge of the toner cartridge win...

Page 111: ...s occur periodically in the printing Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer Check and Cause Solution 1 If dark or blurry black spots occur periodi cally the ro...

Page 112: ...print out again 3 Wait 30 minutes after printer is powered on before you start printing 4 Clean the cartridge and set contacts Generally clean dirt from inside the set 5 Replace the HVPS if the proble...

Page 113: ...tion Light dark background appears in whole area of the printing Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer Check and Cause Solution 1 Printing large quantities of...

Page 114: ...blade in the toner cartridge 1 and 2 Clean all HV contacts If problem persists replace the HVPS If problem still persists replace the Main PBA 3 Replace the toner cartridge and try to print out 4 Chec...

Page 115: ...on 1 Toner leakage due to improperly sealed toner cartridge 2 If the transfer roller is contaminated stains on the face of page will occur 1 Replace the toner cartridge 2 If the transfer roller is con...

Page 116: ...ressure roller Check and clean the area between the H R and the Thermistor Caution Take care not to deform the rollers 7 3 15 Blank Page Print out 1 Description Blank page is printed Check and Cause S...

Page 117: ...A replace as necessary 4 Use Tech mode Modem Test to check that the speaker and amplifier are working Replace the Main B d 7 4 2 Defective MF DIAL Description The MF DIAL is not functioning Check and...

Page 118: ...DEM shows a fault replace the Main B d 7 4 4 Defective FAX FORWARD Description RECEIVE is functioning but FORWARD is not functioning or received data is corrupt Check and Cause Solution 1 Check if the...

Page 119: ...e Solution 1 Check if there is a NOISE line by pressing on hook dial and listening 2 Ask sender to send to another fax machine if possible connected to the same wall socket 1 If you can hear a noisy l...

Page 120: ...orking Check and Cause Solution Check the FAX status of the forwarding side This is a problem with the sending fax machine Correct the setting on the remote machine Check and Cause Solution 1 Check th...

Page 121: ...Cause Solution 1 Check for CCD problem on the Main PBA 2 Check shading profile 1 Check the CCD harness is properly connected 2 Redo shading profile in the tech mode Check and Cause Solution 1 Check t...

Page 122: ...y light or dark Check and Cause Solution 1 Check shading profile 2 Check the gap between original and scanner glass 3 Check printing quality 1 Redo shading profile in the tech mode 2 A gap of more tha...

Page 123: ...par allel port is properly configured in the BIOS 2 If printing is OK check that the Scan driver is also installed Refer to User s Manual 3 If the copy function works replace the Main PBA If the copy...

Page 124: ...the toner cartridge however you should replace the toner cartridge to solve the problem permanently 7 7 2 1 Redistributing Toner When the toner cartridge is near the end of its life white streaks or l...

Page 125: ...r life expired replace the cartridge 7 7 4 2 Toner Empty Explanation The toner cartridge is empty Solution Replace the cartridge 7 7 4 3 Drum Warning Explanation This message appears when the OPC drum...

Page 126: ...intervals a Check the distance between contamination marks b Check the appearance of both ends of the toner cartridge OPC drum 2 Random page contamination a Check that the terminals contact points of...

Page 127: ...ner cartridge and the set are clean b Check that the terminals contact point of the toner cartridge and the set are not damaged 1 For item 1 Run OPC Cleaning Mode Print 4 5 times repeatedly to remove...

Page 128: ...t of the toner cartridge or set b Check if the terminal assembly is normal Especially check the charge roller terminal 3 The printed image is dark and ghost occurs a Check if foreign substances are st...

Page 129: ...between PC and printer port are correcct If you use windows check that the printer driver in the controller is set up correctly set up the correct port is selected and Use On line is selected in the...

Page 130: ...s there is a hard disk space problem rather than a printer RAM problem In this case pro vide more space on the hard disk Secure more space using the disk utilities program 2 The connection of the cabl...

Page 131: ...rtual memory this is caused by insufficient space on the hard disk 1 Ensure that ECP best or SPP is selected in the CMOS BIOS setup 2 Ensure that the correct driver is loaded Use the driver supplied o...

Page 132: ...previous failed print jobs on the hard disk with the name in the form jnl Delete these files and Reboot Windows to restart the printer 3 Shut down all other programs except the current one if possible...

Page 133: ...s server exists use SyncThru or the control panel on the printer to select Static IP Address Assignment Method in TCP IP tab You should set IP address Subnet Mask and Default Gateway in the printer us...

Page 134: ...pting to upgrade firmware ensure that computer and printer can communicate using a Ping command SycThru is unable to automatically detect the printer 1 Check that the LAN cable is connected to the pri...

Page 135: ...sions 2 If the problem continues In Windows 95 98 boot into MS DOS mode and delete the sammon dll file in the windows system directory the restart Windows and reinstall SyncThru In Windows NT stop the...

Page 136: ...number Note Parts numbers given here are correct at the time of publication When ordering parts please use the on line ordering system to check if there have been any changes to part numbers Part Num...

Page 137: ...2 27 3 16 4 25 5 8 7 1 1 1 2 Toner Cartridge 21 22 SCF 20 19 19 1 19 2 19 3 19 4 17 1 17 17 2 26 1 18 15 1 2 1 4 0 22 4 22 7 22 8 22 10 22 9 22 5 22 13 22 6 22 1 22 2 22 3 22 11 22 12 21 1 21 2 21 3...

Page 138: ...0071A 1 O 220V 7 PBA MAIN MAIN CONTROLLER JC92 01597A 1 O SCX 4720F PBA MAIN MAIN CONTROLLER JC92 01598A 1 O SCX 4520 8 SHIELD P CONTROLLER JC63 00508A 1 X 9 BRACKET P DUMMY CTRL JC61 00679A 1 X 10 ME...

Page 139: ...00154A 1 X 22 3 HOLDER M LOCKER JC61 00953A 1 O 22 4 TRAY M EXIT MP JC63 00447A 1 X 22 5 ADJUST M MP L JC70 00478A 1 X 22 6 ADJUST M MP R JC70 00479A 1 X 22 7 TRAY M COVER_MP JC63 00446A 1 X 22 8 GEA...

Page 140: ...ailable No Description SEC Code Q ty SA Remark 0 ELA UNIT RX DRIVE JC96 03078A 1 O 1 BRACKET GEAR MAIN JC61 00891A 1 X 2 GEAR RDCN 53 26 JC66 00388A 1 O 3 GEAR RDCN 113 33 JC66 00706A 1 X 4 GEAR RDCN...

Page 141: ...1 1 2 1 1 2 4 1 2 2 1 2 3 2 0 2 1 2 2 2 16 2 3 2 6 2 7 2 9 2 13 2 12 2 17 2 18 2 5 2 8 2 15 2 15 2 4 2 10 2 20 2 20 2 21 2 14 2 19 2 22 2 22 2 19 5 2 5 2 5 3 3 3 1 3 20 3 21 3 13 3 16 3 18 3 9 3 15 3...

Page 142: ...ded View Parts List Service Manual 8 7 Samsung Electronics ADF Assembly Continued 4 4 1 4 3 1 4 3 4 3 2 4 3 4 4 3 3 4 3 5 4 8 4 6 4 4 4 5 4 4 4 9 4 2 S 4 7 4 7 S Service Part MEA COVER PLATEN JC 97 02...

Page 143: ...JC72 01320A 1 O 2 7 PMO ACTUATOR REGI SENSOR JC72 01010A 1 O 2 8 PMO ACTUATOR SCAN SENSOR JC72 01011A 1 O 2 9 SPRING ETC TORSION DOC CC2 F JB61 00076A 3 X 2 10 IPR GROUND_ROLLER JC70 10467A 1 X 2 12 R...

Page 144: ...ription SEC Code Q ty SA Remark 4 MEA COVER PLATEN JC97 02024A 1 O 4 1 COVER M PLATEN R2 JC63 00374B 1 O 4 2 SHEET WHITE SPONGE JC63 00209A 1 O 4 3 MEA TX STACKER JC97 01544B 1 O 4 3 1 PMO TX STACKER...

Page 145: ...Service Manual Exploded View Parts List 8 10 Samsung Electronics 8 4 OPE Unit Assembly 0 0 1 3 5 4 8 3 10 5 7 9 10 6 13 11 12 2 2 20 1 19 17 18 16 SCX 4520 SCX 4720F 4 6 15 7 9 8 14 11 12 13 21...

Page 146: ...O S SCREW TAPTITE 6003 000196 7 X No Description SEC Code Q ty SA Remark 0 ELA HOU OPE 4IN1 JC96 03174A 1 O 1 COVER M OPE SEC JC63 00495A 1 X 2 WINDOW LCD_R2_SEC JC64 00171A 1 X 3 KEY M_COPY_R2 JC64...

Page 147: ...s List 8 12 Samsung Electronics 8 5 Scanner Assembly 0 1 1 4 1 5 1 5 1 1 1 2 1 3 1 3 1 1 3 2 1 3 4 1 3 3 2 2 14 2 1 2 5 2 2 2 3 2 15 1 2 15 4 2 15 3 2 15 8 2 15 2 2 15 2 15 5 2 15 7 2 15 6 2 4 2 10 2...

Page 148: ...1 COVER SCAN LOWER JC63 00493A 1 O 2 2 ELA HOU CCD MODULE JC96 02759B 1 O 2 3 CBF SIGNAL CCD FFC JC39 00367A 1 X 2 4 ICT INSERT SHAFT JB70 00154A 1 X 2 5 ICT SHAFT CCD JB70 00145A 1 X 2 6 PMO HOLDER B...

Page 149: ...rvice Available O Service available X Service not available No Description SEC Code Q ty SA Remark 0 ELA HOU COVER MIDDLE JC96 03247A 1 O 1 COVER M MIDDLE R2 JC63 00502A 1 O 2 COVER REAR UPPER JC63 00...

Page 150: ...r 55 54 68 69 8 9 14 58 24 33 21 19 25 43 44 45 47 39 46 17 26 42 71 47 1 46 1 46 2 47 2 47 3 47 4 47 5 45 1 45 2 45 3 40 41 51 5 62 5 5 2 4 ELA HOU FRAME 0 3 65 25 27 73 74 75 76 27 3 27 1 78 27 2 77...

Page 151: ...LOCKER CST JC72 00983A 2 O 14 PMO ACTUATOR CVR OPEN JC72 00974A 1 O 15 PMO PLATE GUIDE DEVE_R JC72 00985A 1 O 16 SPRING ETC GUIDE DEVE JC61 70932A 2 O 17 GROUND PUSH BUSHING JC63 00401A 1 X 18 PMO PLA...

Page 152: ...1 X 45 3 SPRING CS 6107 001167 1 X 46 MEA UNIT BRACKET FEED JC97 01925A 1 O 46 1 BRACKET FEED R2 JC61 00913A 1 O 46 2 GEAR Z35 IDLE JC66 00690A 1 X 47 MEA UNIT CLUTCH JC97 01788A 1 O 47 1 GEAR FEED 1...

Page 153: ...X 65 3 PMO ROLLER FD R JC72 41008A 1 X 65 4 SPRING ETC EXIT ROLL FD JC61 70911A 1 X 66 GUIDE SUB FRONT JC61 00917A 1 X 68 PBA SUB CRUM JC92 01605A 1 O 69 CBF HARNESS CRUM2 JC39 00356A 1 X 70 PBA SUB E...

Page 154: ...Exploded View Parts List Service Manual 8 19 Samsung Electronics 8 8 Fuser Assembly 0 1 31 3 4 5 29 29 37 35 6 17 36 12 14 34 38 37 13 15 32 30 11 16 33 19 18 23 24 25 28 26 27 20 21 36 38 10 7 22 8 9...

Page 155: ...C70 00472A 1 X 15 CBF HARNESS FUSER 110V JC39 00353A 1 X WHITE CBF HARNESS FUSER 220V JC39 00354A 1 X BLACK 16 BUSH HR R_R2 JC61 00887A 1 X 17 LABEL P CAUTION HOT_FUSER JC68 30928D 1 X 18 RMO RUBBER_E...

Page 156: ...Exploded View Parts List Service Manual 8 21 Samsung Electronics 8 9 MP Assembly 0 11 18 24 31 10 2 12 15 29 16 17 13 19 27 19 5 2 4 5 5 1 5 3 6 7 14 26 14 23 28 23 1 30 20 9 3 21 25 25...

Page 157: ...PICK UP_MP JC61 00932A 1 X 12 GEAR IDLE 23 JC66 00396A 1 O 13 SHAFT P PICK_UP JC66 00399A 1 O 14 ROLLER M IDLE FEED JC66 00529A 2 O 15 GEAR M PICK UP_MP JC66 00710A 1 X 16 GEAR M HOLDER_MP JC66 00709A...

Page 158: ...Exploded View Parts List Service Manual 8 23 Samsung Electronics 8 10 Cassette Assembly 0 1 2 3 4 16 6 7 6 4 6 3 6 2 6 1 5 5 10 11 15 12 13 14 8 17...

Page 159: ...ING CS 6107 001166 2 X 6 MEA UNIT HOLDER PAD JC97 01931A 1 O 6 1 HOLDER M PAD JC61 00580A 1 O 6 2 SHEET HOLDER PAD R2 JC63 00407A 1 X 6 3 RPR FRICTION PAD JC73 00140A 1 O 6 4 IPR PLATE PAD JC70 00314A...

Page 160: ...msung Electronics 8 11 SCF Option Cassette Frame Exploded view 0 5 4 2 3 31 15 16 36 34 34 35 24 21 20 22 23 19 18 17 39 39 2 39 1 39 9 39 5 39 4 39 7 39 6 39 3 39 8 28 33 32 25 26 28 27 1 30 37 38 39...

Page 161: ...PICK_UP R JC61 00587A 1 O 13 SHAFT P PICK_UP JC66 00399A 1 O 14 PMO IDLE PICK_UP JC72 00982A 2 X 15 ROLLER FEED JC66 00598A 1 O 16 PMO BUSHING TX JC72 00382B 2 O 17 PMO GEAR PICK_UP A JC72 00979A 1 X...

Page 162: ...SCF JC61 00879A 1 X 39 2 BRKT P GEAR SCF JC61 00881A 1 X 39 3 BRKT M FEED SCF JC61 00878A 1 X 39 4 GEAR 61 47 IDLE JC66 00688A 1 X 39 5 GEAR 59 IDLE JC66 00689A 1 X 39 6 GEAR 35 IDLE JC66 00690A 1 X 3...

Page 163: ...Service Manual Exploded View Parts List 8 28 Samsung Electronics MEMO...

Page 164: ...6 03174D JC96 03183D JC92 01599B 5 SCX 4720F XEP SCX 4520 XEP JC96 03184J JC96 03181J JC96 03174J JC96 03183J JC92 01599B 6 SCX 4720F XET SCX 4520 XET JC96 03184E JC96 03181E JC96 03174E JC96 03183E J...

Page 165: ...6 03174D JC96 03183D JC92 01599B 5 SCX 4720F XEP SCX 4520 XEP JC96 03184J JC96 03181J JC96 03174J JC96 03183J JC92 01599B 6 SCX 4720F XET SCX 4520 XET JC96 03184E JC96 03181E JC96 03174E JC96 03183E J...

Page 166: ...RT NETWORK ADF UNIT P REGI P DET P POS SENSOR ADF MOTOR DRIVER TEA3718X 2EA FLAT COVER SENSOR OPE MICOM LCD LED Drive Key Scan LCD 16 2 LINES 14P 3P FUSER 2P FAN 2P AC PWR MHV SUPPLY DEV THV INLET POW...

Page 167: ...Connection Diagram Service Manual 10 1 Samsung Electronics 1 10 0 10 Connection Diagram CN5 CN2 CN4 CN1 CN9 CN17 CN20 CN24 CN21 CN15 CN25 CN18 CN8 CN7 CN9 CN11 CN23 CN2 CN1 CN3...

Page 168: ...Schematic Diagram Service Manual 11 1 This Document can not be used without Samsung s authorization Samsung Electronics 11 Schematic Diagrams 11 1 Main Board 1 16...

Page 169: ...Schematic Diagram Service Manual 11 2 This Document can not be used without Samsung s authorization Samsung Electronics Main Board 2 16...

Page 170: ...Schematic Diagram Service Manual 11 3 This Document can not be used without Samsung s authorization Samsung Electronics Main Board 3 16...

Page 171: ...Schematic Diagram Service Manual 11 4 This Document can not be used without Samsung s authorization Samsung Electronics Main Board 4 16...

Page 172: ...Schematic Diagram Service Manual 11 5 This Document can not be used without Samsung s authorization Samsung Electronics Main Board 5 16...

Page 173: ...Schematic Diagram Service Manual 11 6 This Document can not be used without Samsung s authorization Samsung Electronics Main Board 6 16...

Page 174: ...Schematic Diagram Service Manual 11 7 This Document can not be used without Samsung s authorization Samsung Electronics Main Board 7 16...

Page 175: ...Schematic Diagram Service Manual 11 8 This Document can not be used without Samsung s authorization Samsung Electronics Main Board 8 16...

Page 176: ...Schematic Diagram Service Manual 11 9 This Document can not be used without Samsung s authorization Samsung Electronics Main Board 9 16...

Page 177: ...Schematic Diagram Service Manual 11 10 This Document can not be used without Samsung s authorization Samsung Electronics Main Board 10 16...

Page 178: ...Schematic Diagram Service Manual 11 11 This Document can not be used without Samsung s authorization Samsung Electronics Main Board 11 16...

Page 179: ...Schematic Diagram Service Manual 11 12 This Document can not be used without Samsung s authorization Samsung Electronics Main Board 12 16...

Page 180: ...Schematic Diagram Service Manual 11 13 This Document can not be used without Samsung s authorization Samsung Electronics Main Board 13 16...

Page 181: ...Schematic Diagram Service Manual 11 14 This Document can not be used without Samsung s authorization Samsung Electronics Main Board 14 16...

Page 182: ...Schematic Diagram Service Manual 11 15 This Document can not be used without Samsung s authorization Samsung Electronics Main Board 15 16...

Page 183: ...Schematic Diagram Service Manual 11 16 This Document can not be used without Samsung s authorization Samsung Electronics Main Board 16 16...

Page 184: ...Schematic Diagram Service Manual 11 17 This Document can not be used without Samsung s authorization Samsung Electronics 11 2 LIU Board...

Page 185: ...Schematic Diagram Service Manual 11 18 This Document can not be used without Samsung s authorization Samsung Electronics 11 3 OPE Board...

Page 186: ...Schematic Diagram Service Manual 11 19 This Document can not be used without Samsung s authorization Samsung Electronics 11 4 USB Host Board...

Page 187: ...Schematic Diagram Service Manual 11 20 This Document can not be used without Samsung s authorization Samsung Electronics 11 5 SMPS_110V...

Page 188: ...20 0V10A B101 TNR101 7D56 1 R8 12 K C7 35V47u F ZD4 18 V CON1 R114 1 2W1 5K PC10 2 TLP3 061 F Q1 BTA12 60 0B C10 63 0V333 R13 1 4W22 Q102 C100 8 Y R11 1W47 R12 1W180 L1 AY70 C11 50 V104 C106 1K471 D10...

Page 189: ...06 6KV ZD201 2 7VB R209 100K R208 10K C205 MY 2A471 R207 330KJ 5V D201 1N4148 C203 681 R205 22K R204 47K C201 MY2A473 5V R202 100 R201 430 9 8 Q201 A708 Y R206 130KF R203 2KJ C1 15 104 5 6 7 1 1 4 U10...

Page 190: ...CS Samsung Electronics Co Ltd July 2004 Printed in Korea VERSION NO 1 00 CODE JC 0127A This service manual is also provided on the web the ITSELF system Samsung Electronics Co Ltd http itself sec sams...