DIGITAL LASER MFP SCX-4720F Series SCX-4720F SCX-4520 SERVICE DIGITAL LASER MFP Manual 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 Parts List 9. Block Diagram 10. Connection Diagram 11.
Precautions 1 1. Precautions In order to prevent accidents and to prevent damage to the equipment please read the precautions listed below carefully before servicing the printer and follow them closely. 1.1 Safety Warning (1) Only to be serviced by appropriately qualified service engineers. High voltages and lasers inside this product are dangerous. This printer should only be serviced by a suitably trained and qualified service engineer.
Precautions 1.2 Caution for safety 1.2.1 Toxic material This product contains toxic materials that could cause illness if ingested. (1) If the LCD control panel is damaged it is possible for the liquid inside to leak. This liquid is toxic. Contact with the skin should be avoided, wash any splashes from eyes or skin immediately and contact your doctor. If the liquid gets into the mouth or is swallowed see a doctor immediately. (2) Please keep toner cartridges away from children.
Precautions 1.2.3 Handling Precautions The following instructions are for your own personal safety, to avoid injury and so as not to damage the printer (1) Ensure the printer is installed on a level surface, capable of supporting its weight. Failure to do so could cause the printer to tip or fall. (2) The printer contains many rollers, gears and fans. Take great care to ensure that you do not catch your fingers, hair or clothing in any of these rotating devices.
Precautions 1.2.5 Disregarding this warning may cause bodily injury (1) Be careful with the high temperature part. The fuser unit works at a high temperature. Use caution when working on the printer. Wait for the fuser to cool down before disassembly. (2) Do not put finger or hair into the rotating parts. When operating a printer, do not put hand or hair into the rotating parts (Paper feeding entrance, motor, fan, etc.). If do, you can get harm. (3) When you move the printer. This printer weighs 15.
Precautions 1.3 ESD Precautions Certain semiconductor devices can be easily damaged by static electricity. Such components are commonly called “Electrostatically Sensitive (ES) Devices”, or ESDs. Examples of typical ESDs are: integrated circuits, some field effect transistors, and semiconductor “chip” components. The techniques outlined below should be followed to help reduce the incidence of component damage caused by static electricity.
Reference Information 2 2. Reference Information This chapter contains the tools list, list of abbreviations used in this manual, and a guide to the location space required when installing the printer. A definition of test pages and Wireless Network information definition is also included. 2.1 Tool for Troubleshooting 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.
Reference Information 2.2 Acronyms and Abbreviations The table in the below explains abbreviations used in this service manual. The contents of this service manual are declared with abbreviations in many parts. Please refer to the table. AC Alternating Current IC integrated circuit ADF Automatic Document Feeder IDE ASIC Application Specific Integrated Circuit Intelligent Drive electronics or Imbedded Drive Electronics ASSY assembly IEEE Institute of Electrical and Electronics Engineers.
Reference Information 2.3 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 shown below. (The image is 70% of the actual A4 size). 2.3.
Reference Information 2.3.
Reference Information 2.3.
Reference Information 2.3.
Reference Information 2.4 Wireless LAN • This product uses a printing function with a wireless LAN, which is an option. - The wireless LAN function uses a frequency instead of connecting LAN cable to connect data to an access point for print. - For a wireless LAN connection, an AP is needed, It is possible to use wireless LAN onnection with wired LAN. Also, if AP is installed in an office or at home, the wireless LAN function can be simply used.
Reference Information MEMO 2-8 Service Manual Samsung Electronics
Specifications 3 3. Specifications Specfications are correct at the time of printing. Product specifications are subject to change without notice. See below for product specifications. 3.1 General Specifications Items SCX-4520 SCX-4720F Major Features Copier, Print, Scan, ADF, Scan-to-Email (Through Smar Thru S/W) Direc Print, Scan-to-USB Memory Fax, Copier, Print, Scan, ADF, Scan-to-Email (Through Smar Thru S/W) Direc Print, Scan-to-USB Memory Size (W*D*H) w/o Hand Set 450mmx423mmx456mm (17.7x16.
Specifications Items Periodic Replacing Parts Environmental SCX-4520 Pickup Roller 150,000 Pages Pad Unit(Tray) 150,000 Pages Pad Unit (ADF) 20,000 Pages Transfer Roller 60,000 Pages Fuser Unit 80,000 Pages Temperature Humidity Operating 10~32°C Non Operating -20~40°C Operating 20~80% Non Operating 10~90% Altitude EMI Approval Device Memory SCX-4720F Max 8,200ft Class B Standard / Max. 32MB/160MB(Std.
Specifications 3.2 Print Specification Items PRINT SCX-4520 SCX-4720F Print Speed Up to 22ppm/Ltr, 20ppm/A4 (600 dpi) Print Emulation GDI, PCL6, PCL5e PostScript Level3(opt.) *Korea (KS / KSSM / KSC5895) Auto Emulation Sensing YES Font Type 45 Scalable, 1 Bitmap Number N/A Power Save Resolution Yes(5/10/15/30/45min.) Normal 600x600dpi RET Yes (1200x1200dpi) Toner Save Yes (No dedicated button on CP) Memory 16MB FPOT From Stand by Approx.
Specifications 3.3 Scan Specification Items SCAN SCX-4520 Scan Method Color CCD Scan Speed Linearity Approx. 75sec (USB 1.1) through ADF Gray Approx. 75sec (USB 1.1) Color Approx. 150sec (USB 1.1) Linearity Approx.75sec (USB 1.1) Scan Speed through Platen Gray Resolution Approx. 150sec (USB 1.1) Optical 600*1200dpi Enhanced 4800dpi*4800dpi 256level Max. Document Width Max.216mm(8.5") Effective Scan Width Max 208mm(8.2inch) Scan-to Scan Depth 3-4 *USB 1.
Specifications 3.4 Copy Specification Items COPY SCX-4520 Copy Quality Text Selection or Original Image Text/Photo type selection Photo Mode Other FCOT Stand by SCX-4720F 600x300dpi 600x300dpi 600x600dpi for Platen N/A Approx. 10 seconds:Platen Approx.
Specifications Items TELEPHONE SCX-4520 Handset No No On hook Dial No Yes Search No Yes (Phone Book) 1-Touch Dial No 40EA (20 x shift) *20 x 2 Dedicated keys Speed Dial No 200 locations(00~199) include 1-touch dials TAD I/F No Yes Tone/Pulse 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 Print out Confirmation No
Specifications 3.5 Fax Specification Items Fax SCX-4520 SCX-4720F Compatibility No ITU-T G3 Communication System No PSTN/PABX Modem Speed No 33.6Kbps TX Speed No 3sec Compression No MH/MR/MMR/JPEG Color Fax No Yes(Send Only) ECM No Yes Std No 203*98dpi Fine No 203*196dpi S.Fine No 300*300dpi Scan Speed Std No 2.5 sec/ LTR (ADF) Fine/S.
Specifications 3.6 Other Specification Items Network Paper Handling SCX-4520 Option Yes (Standard) Protocol SPX/IPX, TCP/IP, Ethertalk, SNMP, HTTP 1.
Specifications Items Software Consumables SCX-4520 Compatibility SCX-4720F DOS No Win 3.x No Win 95 No Win 98 Yes Win ME Yes Win NT 4.0 Yes Win 2000 Yes Win XP Yes Mac English only web version Linux No WHQL MFP Yes for 2000 & XP Driver Printer GDI, PCL6, PCL5e (Std.), PostScript Level3 (Std.
Specifications MEMO 3-10 Service Manual Samsung Electronics
Summary of Product 4 4. Summary of Product This chapter describes the functions and operating principal of the main components. 4.1 Printer Components 4.1.
Summary of Product 4.1.2 Rear View * This wireless network antenna is not supplied 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 Card and install it separately. *** If your country has a different telephone connection system, this socket may be blocked.
Summary of Product 4.1.
Summary of Product 4-4 Service Manual Samsung Electronics
Summary of Product Control Panel (SCX-4520) 1 2 S C A N 3 Adjusts the brightness of the documents for the current copy job. Selects the document type for the current copy job. Allows you to access a list of your PC software programs that an image can be scanned to. You must create the scan list using the Samsung software (Printer Setting Utility) provided with this machine.
Summary of Product 4 Stops an operation at any time. In Standby mode, clears/cancels the copy options, such as the darkness, the document type setting, the copy size, and the number of copies. Starts a job. Selects the number of copies. 5 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 smaller or larger than the original.
Summary of Product 4.2 System Layout The SCX-4720F/4520 is roughly made up Main Control part, Operation Panel part, Scanner part, Line Interface part and Power part. Each Part is separated Module which focus on common and standard design of different kind products. main control part adopting Fax & LBP Printer exclusive Controller is composed of 2 CPU and 1 Board. Scanner part is composed of ADF and Platen and is connected with Main by Harness. 4.2.
Summary of Product 4.2.4.4 Pressure roller The Pressure Roller mounted under the heat roller, it is made of a silicon resin, and the surface of the roller is coated with Teflon. This ensures that toner does not adhere to the roller surface. 4.2.4.5 Safety Features • To prevent overheating - 1st protection device: Hardware cuts off when overheated - 2nd protection device: Software cuts off when overheated - 3rd protection device: Thermostat cuts off mains power to the lamp.
Summary of Product 4.2.6 LSU (Laser Scanner Unit) This is the core of the laser printer. It converts the video data received from the computer into an electrostatic latent image on the surface of the OPC drum. This is achieved by controlling the laser beam and exposing the surface of the OPC drum to the 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.
Summary of Product 4.2.7 Toner Cartridge The toner cartridge is an integral unit containing the OPC unit and toner unit.
Summary of Product 4.3 Main PBA The Engine Board and Controller Board have been integrated into a single PBA. This consists of the CPU, printer scanner and line control functions. The CPU functions as the bus controller, I/O handler, motor driver and PC inter-face. The main board sends the Current Image Video data to the LSU and manages the Electrophotographic printing process.
Summary of Product 4.3.1 ASIC Use 32Bit RISC Processor, ARM946ES,which is exclusive controller to execute Printer & FAX Function and to execute operation block by flash memory within system program, and to control whole system. • Main function block • Completely Integrated System for Embedded Applications, • 32 Bit Risc Architecture, Efficient and Powerful ARM9 Core.
Summary of Product 4.3.2 Memory The SCX-4720F/4520 has Flash ROM and DRAM memory units. There are 2 SODIMM sockets to enable extra DRAM or FlashROM (Postscript Option) to be fitted. On Domestic 9Korean) models additional Mask ROM is also fitted: to store domestic Fonts such as PCL Font and KS5895, KSSM etc. - Capacity : 32MByte - Access Time : 100nsec 4.3.3 Flash Memory Record System Program, and download System Program by PC INTERFACE. FAX for Journal List, and Memory for One Touch Dial, Speed Dial List.
Summary of Product 4.3.6 Sensor input circuit 1) Paper Empty Sensor The Paper Empty sensor (Photo Interrupter) on the SMPS/HVPS PBA (CON2-2) is monitored by the CPU on signal (nP_EMPTY). When the cassette is empty the printer displays a message on the LCD panel. 2) MP Sensing Presence of paper in the MP tray is detected by operation of the MP Sensor (Photo Interrupter) on the SMPS/HVPS PBA (CON2-14).
Summary of Product 4.4 SMPS & HVPS The SMPS and HVPS are on one integrated board. The SMPS supplies the DC power to the system. It takes either 110V or 220V and outputs the +5V, +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 to provide the ideal voltages to create the image.
Summary of Product 4.4.1 HVPS(High Voltage Power Supply) 1) Transfer High Voltage (THV+) - Function : It is this voltage that transfers toner from the OPC Drum to the paper. - Output voltage : +1300V DC±20V - Error : IF THV (+) is not present, low density printing occurs due to toner on the OPC Drum not being transferred to the paper. It is possible that waste toner over-flow can occur if this condition persists. Ghost images may appear which repeat at 76mm intervals.
Summary of Product 4.4.2 SMPS (Switching Mode Power Supply) This is the power source for the whole system. It is an independent module so that it is possible to use it for common use. It is mounted at the bottom of the set. It consists of the SMPS section, which supplies the DC power to drive the system, and the AC heater control part, which supplies the power to the fuser. The SMPS has four output channels (+5V, +24V and 24VS).
Summary of Product 6) Feature - Summary of Product Insulation resistance : over 50M Ω (at DC500V) Insulating retest pressure : Must be no problem within 1min. (at 1500Vzc, 10mA) Leakage current : under 3.
Summary of Product 4.5 Engine F/W 4.5.1 Feeding If feeding from the cassette the drive of the pickup roller is controlled by controlling the pick-up solenoid. The on/off of the solenoid is controlled by controlling the general output port or the external output port. If feeding from the manual feeder the set decides to feed the paper according to the operation of the manual sensor, and by driving the main motor, insert the paper in front of the feed sensor.
Summary of Product 4.5.4 Fusing 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 determine the temperature of the heat roller. The AC power is controlled by comparing the target temperature to the value from the thermistor. If the value from the thermistor is out of the controlling range while controlling the fusing process, the error stated in the table occurs.
Summary of Product 4.6 OPE PBA The OPE board consists of various function keys and an LCD to display set status and operator messages. A MICOM (HOLTEC HT48R50) drives the LEDs and LCD. Communication between the OPE and the CPU on the main board is serial (related signals are /Reset, TXD, and RXD). 4.7 USB Host The USB Host PBA provides power to the USB connector to enable a USB Memory drive to be used in conjunction with the USB Direct printing and Scan to USB functions.
Summary of Product 4.8 Fax Section 4.8.1 Modem • Group3 Facsimile Modem (Entire FM336/314 Family) • External Handset Support (not implemented on SCX4720F) • Requires Discrete Line Interface Unit (LIU ) • V.34 Half-Duplex Mode • V.90 PCM/V.
Summary of Product 4.8.2 LIU PBA The LIU board is the Line interface unit. It consists of a Tel_line Interface circuit and Telephone circuit. The Tel_Line circuit consists of a matching transfer to conform 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.
Summary of Product 4.8.3 Tel-Line Connection Circuit • The Tel-Line Connection Circuit connects the fax machine to the PSTN using Tip and Ring terminals. • Use Modular 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 circuit which matches the internal impedance of the fax machine to the external -48Volt DC impedance of the PSTN system.
Summary of Product 4.8.5 On Hook State • DC10V ~ DC100V, DC Resistance : 5MΩ and over • DC150V ~ DC200V, DC Resistance : 30KΩ and over • Ring Sensitivity - Ring detection voltage : 40Vrms ~ 150Vrms - Ring detection frequency : 15.3Hz ~ 68Hz - Ring detection current : 20mA ~ 100mA • Pseudo Ring Sound - Ring frequency : 750Hz + 1020Hz - Ring Interrupt period : Mark/Space controlled by CPU/Modem 4.8.
Summary of Product 4.8.7 Signal • Input Signal Level Range : - 0dBm ~ - 48dBm • DP (Dial Pulse) Dial - Make / Brake Ratio : 40 : 60 - Pulse Speed : 10 ± 0.
Summary of Product MEMO Service Manual Samsung Electronics 4-27
Precautions 5 5. Disassembly and Reassembly 5.1 General Precautions on Disassembly When you disassemble and reassemble components, you must use extreme caution. The close proximity of cables to moving parts makes proper routing a must. If components are removed, any cables disturbed by the procedure must be restored as close as possible to their original positions. Before removing any component from the machine, note the cable routing that will be affected.
Precautions 5.2 Rear Cover 1. Remove the four screws securing the Rear Cover. 3. Unclip the Face Up Cover from the Rear cover, as shown below. Then lift the Face Up Cover out. Face Up Cover 2. Remove the Rear Cover from the Frame Ass'y and Scanner Ass'y.
Precautions 5.3 Side Cover (LH, RH) 1. Before you remove the Side Cover (LH, RH), you should remove: - Rear Cover (see page 5-2) 2. Take out the Cassette. Side Cover (LH) Cassette 3. Open the front cover and remove 2 screws on the front and 1 screw on the back. Release 3 clips underneath, ease the rear screw bracket over its locating pin and pull the RH side cover to the right, taking care not to damage the clips, to remove it from the Frame Assembly.
Precautions 5.4 Front Cover 1. Open the Front Cover. 3. Unclip the Front Cover from the Frame Ass'y. Then remove the Front Cover, as shown below. Front Cover 2. Remove the Toner Cartridge.
Precautions 5.5 Scanner Ass'y 1. Before you remove the Scanner Ass'y, you should remove: - Rear Cover (see page 5-2) - Side Cover (LH, RH) (see page 5-3) 4. Pull up the Scanner Ass'y, as shown below. Scanner Ass'y 2. Remove the 2 screws securing the Scanner Ass'y, as shown below. 5. SCX4520 only. Lift the Platen Cover upward to remove it. 1 3. Remove the 5 connectors and the ground wire screw from the main PBA as shown below.
Precautions 6. SCX4720F. Free the Scanner Cable Harness from the clips underneath the scanner and release it from the frame. 8. Release the 3 clips on the front of the OPE unit and remove the OPE unit as shown below, taking care to thread the cable harness through the frame Clips 7. Lift the front part of the COVER-OPE FRONT to release the hook connecting the cover with the scan assembly.
Precautions 9. Remove the 4 screws securing the Scan Upper. 12. Pull up the CCD Shaft and take out the Scanner Module. Scanner Module CCD Shaft 10. Unclip the Scan Upper from the Scan Ass'y by releasing 2 clips on each side then pull the Scan Upper upward and remove it. Scan Upper 13. Squeeze the spring to release the tension in the Belt and lift from the pulleys as shown below. Spring Belt 11. Remove the CCD Cable, as shown below.
Precautions 14. Remove the Reduction Gear and Idle Gear, as shown below. Gear-Reduction Gear-Timing Caution. Reassembling Scanner Module 1. When re-fitting the scanner belt and belt spring take care to relocate the tension spring as close to the right hand side of the scanner module as is possible, as shown on the right. 2. When refitting the Scan Upper cover take care to ensure that the cover open switch is not trapped.
Precautions 15. Remove the 3 screws and take out the Motor Bracket. 17. Unlatch the Open Sensor and remove it, as shown below. Motor Bracket Open Sensor 16. Unplug the connector from the Open Sensor Ass'y. 18.
Precautions 5.6 ADF Motor Ass'y 1. Before you remove the ADF Motor Ass'y, you should remove: - Rear Cover (see page 5-2) - Side Cover (LH, RH) (see page 5-3) - Scanner Ass’y (see page 5-5) 4. Release the Bush and rotate it until it reaches the slot, as shown below. Then lift the Pick-Up Ass'y out. Pick up Ass y 2. Unclip the harness from the platen cover. Remove the 2 screws securing the ADF Ass'y and remove it, taking care to thread the harness through the frame. Bushing ADF Ass y 5.
Precautions 6. Unplug the one connector and remove 5 screws securing the ADF Motor Ass'y. Then take out the ADF Motor Ass'y. ADF Motor Ass y ADF Lower 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 pair of tweezers or a small flat-bladed screwdriver, release the clips on each side of the ADF Separator Pad Ass’y.
Precautions 5.7 OPE Unit(SCX-4520) 1. Before you remove the OPE 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) 4. Remove the Key Pad from the OPE Cover. 2. Remove the 7 screws securing the OPE PBA from to the OPE Cover. OPE Cover Key Pad OPE PBA 3. Remove the Contact Rubber from the OPE Cover.
Precautions OPE Unit(SCX-4720F) 1. Before you remove the OPE 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) 4. Remove the Key Pad from the OPE Cover. 2. Remove the 10 screws securing the OPE PBA from to the OPE Cover. OPE Cover Key Pad OPE PBA 3. Remove the Contact Rubber from the OPE Cover.
Precautions 5.8 Middle Cover & Exit Roller 1. Before you remove the Middle Cover and Exit Roller, you should remove: - Rear Cover (see page 5-2) - Side Cover (LH, RH) (see page 5-3) - Scanner Ass'y (see page 5-5) 4. Remove the Exit Gear and Bearing, as shown below. 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 Middle Cover from the Frame Ass'y, as shown below.
Precautions 5.9 Controller Shield Ass’y 1. Before you remove the Main PBA, you should remove: - Rear Cover (see page 5-2) - Side Cover(LH, RH) (see page 5-3) 2. Remove all of the connectors and the 5 screws connecting the Controller Shield Assembly to the Middle Cover and frame and remove the assembly. 4. Remove 3 screws to remove the bracket from the main board. Main Board Controller Shield Ass y Bracket 3.
Precautions 5.10 Engine Shield Ass’y & Exit Board 1. Before you remove the Engine Shield Ass'y, you should remove: - Rear Cover (see page 5-2) - Side Cover(LH, RH) (see page 5-3) - Scanner (see page 5-5) 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 removing the ass’y. 2. Unplug the Exit, AC and Fan connectors. Unplug the LIU connector if fitted.
Precautions 5.11 SMPS and LIU 1. Before you remove the SMPS, you should remove: - Rear Cover (see page 5-2) - Side Cover(LH, RH) (see page 5-3) - Scanner Ass’y (see page 5-5) - Engine Shield Ass’y(see page 5-16) 4. Remove the 3 screws securing the SMPS. Then lift the SMPS out, as shown below. SMPS 2. Remove the 2 screws securing the Inlet Bracket and remove it Inlet Bracket 3. Remove the one screw securing the Engine Shield ground wire 5. Remove the 3 screws securing the LIU.
Precautions 5.12 Fuser Ass'y 1. Before you remove the Fuser Ass'y, you should remove: - Rear Cover (see page 5-2) 4. Remove the 2 screws securing the Halogen Lamp. Then take out the Halogen Lamp from the Heat Roller 2. Unplug the two connectors from the Main PBA and SMPS, as shown below. Then remove the 4 screws securing the Fuser Ass'y and remove it. Heat Roller Fuser Ass y Halogen Lamp 5. Remove 4 screws to remove the fuser cover as below. Remove 2 screws to remove the guide input. 3.
Precautions 6. Unwrap the Thermistor Harness, as shown below. 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 page 5-3) 2. Unplug the connector from the SMPS and remove the one screw. Then take out the Fan.
Precautions 5.14 LSU 1. Before you remove the LSU, you should remove: - Rear Cover (see page 5-2) - Side Cover (LH, RH) (see page 5-3) - Scanner Ass’y (see page 5-5) - Front Cover (see page 5-4) - Middle Cover (see page 5-14) 3. Unplug the two connectors. 2. Remove the 4 screws securing the LSU and remove it. 5.15 CRUM Board 1.
Precautions 5.16 Drive Ass'y 1. Before you remove the Drive Ass'y, you should remove: - Rear Cover (see page 5-2) - Side Cover (LH) (see page 5-3) - Shield Controller Ass’y (see page 5-9) 3. Take out the Drive Ass'y, then unplug the connector from the Motor PBA, as shown below. Drive Ass y 2. Remove the 5 screws securing the Drive Ass'y. Drive Ass y Caution. The six screws have numbers stamped. into the Drive Ass’y base plate.
Precautions 5.18 Transfer Ass'y 1. Before you remove the Transfer Ass'y, you should remove: - Rear Cover (see page 5-2) - Side Cover (LH, RH) (see page 5-3) - Scanner Ass’y (see page 5-5) - Front Cover (see page 5-4) - Middle Cover (see page 5-14) - LSU (see page 5-20) - Cover Mid Front (see page 5-22) 4. Remove the transfer roller by pressing the hook securing the roller to the right using a tool. 2. Remove the 3 screws securing the Transfer Earth and remove it. Hook Transfer Earth 5.
Precautions 5.19 Feed Ass'y 1. Before you remove the Feed Ass'y, you should remove: - Rear Cover (see page 5-2) - Side Cover (LH, RH) (see page 5-3) - Front Cover (see page 5-4) - Scanner Ass’y (see page 5-5) - Middle Cover (see page 5-14) - Controller Shield Ass’y (see page 5-15) - Drive Ass’y (see page 5-20) 4. Remove the 3 screws securing the Feed Bracket and remove it. Feed Bracket 2. Remove the 4 screws securing the Guide Paper Front and remove it. 5. Remove the Feed Gear2. Guide Paper Front 3.
Precautions 6. Remove the Feed Gear1 Ass'y. 7. Pull up the Feed Roller and Feed Roller1.
Precautions 5.20 Pick-Up Ass'y & Solenoid 1. Before you remove the Pick-Up Ass'y, you should remove: - Rear Cover (see page 5-2) - Side Cover (LH, RH) (see page 5-3) - Front Cover (see page 5-4) - Scanner Ass’y (see page 5-5) - Middle Cover (see page 5-14) - Controller Shield Ass,y (see page 5-15) - Engine Shield Ass,y (see page 5-16) - Drive Ass'y (see page 5-20) - Feed Ass’y (see page 5-23) 4. Remove the 2 screws securing the Manual Solenoid and Pick-Up Solenoid.
Precautions 6. It is a simple matter to replace the MP Pickup Roller and the main cassette Pickup Roller without dismantling the set. In both cases first remove the main paper cassette, toner cartridge and front cover. a) In order to replace the main cassette Pickup Roller 1) Turn the set upside down 2) Release the white catch and slide the locking piece as far to the side as possible. 3) Slide the white collar as far to the side as possible.
Alignment & Adjustments 6 6. Alignment and Adjustments This chapter describes some of the main service procedures including: Using the EDC mode; Clearing paper jam and test patterns. Much of this chapter is also included in the user's guide. 6.
Alignment & Adjustments 6.1.1 Copy & Scan Document Path Scanner Part 3 2 1 2 3 4 5 6 7 8 1 4 5 6 7 8 White-Sheet CCD-Module Doc. Paper (50 Sheets) Pickup Roller ADF Roller Sensor - Doc. Sensor - Regi Sensor - Scan Feed Roller Exit Roller 6.1.2 Printer Paper Path 1) After receiving a print command, the printer feeds paper from the main cassette or manual feeder as required. 2) The paper being fed passes the paper feed sensor.
Alignment & Adjustments 6.2 Clearing Paper Jams Occasionally, paper can be jammed during a print job. Some of the causes include: • The tray is loaded improperly or overfilled. • The tray has been pulled out during a print job. • The front cover has been opened during a print job. • Paper was used that does not meet paper specifications. • Paper that is outside of the supported size range was used. If a paper jam occurs an error message appears in the LCD display. Find and remove the jammed paper.
Alignment & Adjustments 6.2.1 Clearing Document Jams If a document jams while it is feeding through the ADF (Automatic Document Feeder),“DOCUMENT JAM ” appears on the display. 6.2.1.1 ADF Input Misfeed 1) Open the ADF top cover. 3) Close the ADF top cover. Then load the documents back into the ADF. NOTE : To prevent document jams, use the document glass for the thick, thin or mixed documents. 2) Pull the document gently to the right and out of the ADF.
Alignment & Adjustments 6.2.1.2 ADF Exit Misfeed 1) Open the document cover and turn the release knob to remove the misfed documents from the exit area. 2) Close the document cover.Then load the documents back into the ADF. 6.2.1.3 ADF Roller Misfeed 1) Open the document cover. 2) Turn the release knob so that you can easily remove the misfed document, and remove the document from the ADF or the feed area by carefully pulling it towards the right by using both hands. 3) Close the document cover.
Alignment & Adjustments 6.2.2 JAM0 (In the Paper Feed Area) 1) Open and close the front cover.The jammed paper automatically exits the machine. If the paper does not exit,continue to Step 2. 4) Insert the paper tray into the machine until it snaps into place. 2 Pull the paper tray open. 5) Open and close the front cover to resume printing. 3) Remove the jammed paper by gently pulling it straight out.
Alignment & Adjustments 6.2.3 JAM1 (In the Fuser Area or Around 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. 3) Replace the toner cartridge and close the front cover. Printing automatically resumes. 2) Remove the jammed paper by gently pulling it straight out.
Alignment & Adjustments 6.2.4 JAM 2 (In the Paper Exit Area) 1) Open and close the front cover. The jammed paper automatically exits the machine. If the paper does not exit, continue to Step 2. 4) Remove the jammed paper by gently pulling it straight out.. 2) Gently pull the paper out of the front output tray. 5) Close the rear cover. 3) If there is any resistance when you pull the paper or the paper is not seen in the front output tray, open the rear cover.
Alignment & Adjustments 6.2.5 MP-Tray Jam (In the Bypass Tray) “MP Tray Jam” 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 is not properly fed into the machine through the manual feeder. In that case, pull the paper out of the machine.
Alignment & Adjustments 6.3 User Mode(SCX-4520) The table below shows the map of User settings available in User Mode. These are fully described in the User Guide and are not included here. 1.Paper Setting Paper Tray Paper Size 2.Copy Setup Change Default Timeout System Data 9.Maintenance 8.Machine Setup Clean Drum Clear Memory 6-10 6.
Alignment & Adjustments 6.3 User Mode(SCX-4720F) The table below shows the map of User settings available in User Mode. These are fully described in the User Guide and are not included here. 1.Paper Setting Paper Tray Paper Size 4.Fax Feature Delay Fax Priority Fax Add / Cancel 7.Sound/Volume Speaker Ringer Key Sound Alarm sound 2.Copy Setup Change Default Timeout 5.Advanced Fax 3.Fax Setup Receive Mode Ring to Answer Contrast Redial Term Redials MSG Confirm.
Alignment & Adjustments 6.4 Tech Mode 6.4.1 How to Enter Tech Mode In service (tech) mode the technician can check the machine and 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 the Tech mode To enter the Tech mode press in sequence and the LCD briefly displays ‘TECH’, the machine has entered service (tech) mode. 6.4.
Alignment & Adjustments 6.4.3 Data Setup SEND LEVEL You can set the level of the transmission signal. Typically, the Tx level should be under -12 dBm. Caution : The Send Fax Level is set to the best condition during manufacture. Never change settings arbitrarily. DIAL MODE This function can choose the dialing method. *Default : Dial (Dial/Pulse) MODEM SPEED You can set the maximum modem speed.
Alignment & Adjustments FLASH UPGRADE There are 2 methods to update the Flash Rom, Local and Remote. (1) Local Machine • RCP (Remote Control Panel) mode This method is for Parallel Port or USB Port. Connect the PC and activate the RCP (Remote Control Panel) to upgrade the Firmware. < Method > How to Update Firmware using RCP 1. Connect PC and Printer with a Parallel Cable or a USB Cable. 2. Run the RCP utility and select Firmware Update. 3.
Alignment & Adjustments 6.4.4 Machine Test SWITCH TEST Use this feature to test all keys on the operation control panel. The result is displayed on the LCD window each time you press a key. MODEM TEST Use this feature to hear various transmission signals to the telephone line from the modem and to check the modem, amplifier and speaker. If no transmission signal sound is heard, it means the modem part of the main board, amplifier, speaker or speaker harness is faulty.
Alignment & Adjustments 6.4.5 Report PROTOCOL 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 list provides a list of the user system data settings and tech mode settings.
Alignment & Adjustments 6.5 Engine Test Mode The Engine Test Mode supplies useful functions to check the condition of the print engine. It tests the condition of each device and displays the result of the test on the LCD. It is divided into 5 functions (0~4), and these are shown below. 6.5.1 To enter the Engine Test Mode To enter the Engine Test mode Press in sequence, and the LCD briefly displays ‘Engine Test’, the machine has entered Engine Test Mode.
Alignment & Adjustments 6.5.3 Detail Description (Engine Test Mode) Function Name 01.Motor Test 02.Pick Up Test 03.Fan Test 04.Manual Clutch Test 05.PTL Test 11.LSU Motor 12.LSU Hsync Test 13.LD Test 21.Feed Sen Test 22.Exit Sen Test 23.Cover Sen Test 24.Empty Sen Test 25.Manual Sen Test 31.Them ADC 180 32.Them ADC 140 33.Them ADC 120 34.Them ADC 100 41.MHV Test 42.Dev Bias Test 43.THV EN/NEG Test 44.THV ON(1300V) 45.THV ADC 1300V 46.
Alignment & Adjustments 6.6 Identify Sale Date This function confirms the date that the consumer bought the product and used the product for the first time. When the consumer first operates the machine, it will start the scan and page counters. 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 on the LCD.
Alignment & Adjustments 6.7 Consumables and Replacement Parts The life cycle outlined below is a general guideline for maintenance purposes and is for reference only. Environmental conditions (temperature, humidity, dust etc.) and actual use can cause these figures to vary.
Alignment & Adjustments 6.8 Abnormal Image Printing and Defective Roller If a mark or other printing defect occurs at regular intervals down the page it may be caused by a damaged or contaminated roller. Measure the repetition interval and refer to the table below to identify the roller concerned.
Alignment & Adjustments 6.9 Error Messages The front panel displays the printer's status or error messages. Refer to the list below for an explanation of these messages and how to clear problems. The messages and their meanings are listed in alphabetical order, with numbered messages following. MP Tray Jam [Door Open] Meaning: A paper jam has occurred in the manual feeder or the multi-function printer detects improper feeding from the manual feeder. Solution: Clear the paper jam.
Alignment & Adjustments [LSU Error] Meaning: A problem has occurred in the Laser Scanning Unit (LSU). Solution: Use TECH mode to test LSU. Replace the LSU Invalid Cartridge or No Cartridge Meaning: You have used an unauthorized cartridge. Solution: You must use a Samsung approved cartridge. [Line Error] (Only SCX-4720F) Meaning: Your machine cannot connect with the remote machine or has lost contact because of a problem with the phone line. Solution: Try again.
Alignment & Adjustments Registered Meaning: The group dial location is already registered with another speed dial number. Solution: Select another group dial location. [Retry Redial?] (Only SCX-4720F) Meaning: The multi-function printer is waiting for a specified time interval to redial a previously busy station. Solution: You can press
Troubleshooting 7 7. Troubleshooting 7.1 Paper Feed problems – Causes and Solutions 7.1.1 Wrong Print Position • Description Printing begins when the paper is in the wrong position. Check and Cause Solution A defective feed sensor actuator can cause incorrect timing. Replace the defective actuator 7.1.2 JAM 0 1. Paper does not exit from the cassette. 2. Jam-0 occurs when the paper feeds into the printer. • Description Check and Cause L S U Fuser Toner Cartridge CR DR EXIT Sensor OPC PR 1.
Troubleshooting 7.1.3 JAM 1 1. Recording paper is jammed in front of or inside the fuser. 2. Recording paper is stuck in the discharge roller and in the fuser just after passing through the Actuator-Feed. • Description Check and Cause Solution L S U Fuser Toner Cartridge CR DR EXIT Sensor OPC PR SR PTL 1. Replace the SMPS. 2. If the recording paper is stuck in the discharge roller and the fuser just after passing through the ActuatorFeed, Feed Actuator may be defec tive. 2.
Troubleshooting 7.1.5 Multi-Feeding • Description Multiple sheets of paper are fed at once. Check and Cause Solution 1. Check that the paper size guides are set correctly (cassette and MPF tray). 1. Adjust paper guides. 2. Solenoid malfunction (the solenoid does not work properly). 2. Replace the solenoids or PBA as appropriate. 3. Friction Pad is contaminated. 3. Clean the friction pad rubber with a soft cloth dampened with IPA (Isopropyl Alcohol) or water. 4. Paper has a rough surface texture.
Troubleshooting 7.1.7 Paper rolled on the OPC Drum • Description Paper is rolled up in the OPC. Check and Cause Solution 1. Paper is too thin. 1. Use paper that conforms to the printer specification. 2. The face of paper is curled. 2. Ensure paper is stored properly to prevent curl. Note. To remove paper rolled in the OPC. • Remove the toner cartridge from the 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.
Troubleshooting 7.2 Set Malfunction – Causes and Solutions 7.2.1 LCD Display Defect ( • Description in LCD Display) Strange characters are displayed in the LCD Window and OPE Panel buttons do not work. Check and Cause Solution 1. Clear the memory. (see page 6-18) 1. Try again after clearing the memory. 2. Check that the OPE HARNESS is connected to the Connection Board correctly. 2. If re-connecting the harness does not correct the fault replace the OPE Ass’y and the main Board in sequence. 7.2.
Troubleshooting 7.2.3 Fuser gear melts due to overheating causing Paper Jam. • Description Constant Jam where paper is entering Fuser unit. Fuser rollers do not turn Check and Cause 1. Check the Heat Lamp, thermostat and thermistor Solution 1. Use EDC Mode to test the fuser. Replace Fuser unit Replace SMPS or Main PBA as appropriate. 7.2.4 Paper Empty • Description Paper Empty is displayed in the LCD panel even when paper is loaded in the cassette. Check and Cause Solution 1.
Troubleshooting 7.2.6 Cover Open • Description The Cover Open message appears on the LCD even when the print cover is closed. Check and Cause Solution 1. The ‘Open Cover’ microswitch may be stuck or faulty 1. Use TECH mode(“cover sensor test”) to check cover switch operation. Check and replace switch if necessary. 2. The tab on the front cover may be damaged or broken 2. Replace the front cover. 3. Check the connector and cables between Switch and main PBA. 3.
Troubleshooting 7.2.8 Defective motor operation • Description Main motor is faulty and paper does not feed into the printer, resulting in Jam 0' Check and Cause 1. The main motor harness or Motor PCB may be faulty. Solution 1. Check the motor harnesses and connectors, replace if defective.. If the problem persists replace the main PBA. Note Check motor operation using EDC Mode. 7.2.9 No Power • Description When system power is turned on the LCD panel does not come on. Check and Cause Solution 1.
Troubleshooting 7.3 Paper Feed Problems – Causes and Solutions 7.3.1 Wrong Print Position • Description Printing begins when the paper is in the wrong position. Check and Cause Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer A defective feed sensor actuator can cause incorrect timing. Solution Replace the defective actuator 7.3.2 Vertical White Line • Description White vertical voids in the image.
Troubleshooting 7.3.3 Horizontal Black Bands • Description 1. Dark or blurry horizontal stripes occur in the printing periodically. (These may occur at regular intervals down the page.) Check and Cause Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer Solution 1. Bad contacts on the toner cartridge high voltage terminals. 1. Clean all HV terminals on the cartridge and on the set frame. Ensure all toner or paper dust particles are removed. 2.
Troubleshooting 7.3.5 Light Image • Description The printed image is light, with no ghost. Check and Cause Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer Solution 1. Toner Save mode enabled 1. Ensure the Toner Save mode is off. Check set and driver settings. 2. Develop roller is contaminated or the toner cartridge is almost empty. 2. Replace the toner cartridge and try to print out again. 3. Ambient temperature is below than 10°C. 3.
Troubleshooting 7.3.7 Uneven Density • Description Print density is uneven between left and right. Check and Cause Solution 1. 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 holders are damaged. 1. Replace both the left and right bush and spring assemblies. 2. The life of the Toner cartridge has expired. 2. Replace the toner cartridge and try to print out 3.
Troubleshooting 7.3.9 Ghost (1) • Description Check and Cause 75.5 mm Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer Ghost occurs at 75.5 mm intervals of the OPC drum in the whole printing. 1. Bad contacts caused by contamination from toner particles between high voltage terminal in the main body and the electrode of the Toner cartridge. Solution 1 and 2. Clean all HV contacts, If problem persists replace the HVPS.
Troubleshooting 7.3.11 Ghost (3) • Description Check and Cause Fuser contamination. 32 mm Digital Digital Printer Printer Digital Digital Printer Printer Ghost occurs at 66.3 or 75.5 mm intervals. Digital Digital Printer Printer Solution 1. Disassemble the fuser and remove any contamination on the rollers. Clean any contamination from between the Thermistor and the Heat roller. (Caution: Take care not to deform the rollers.) 7.3.
Troubleshooting 7.3.14 Stains on Back of Page • Description The back of the page is stained at 47.1 or 75.4 mm intervals. Digital Digital Pri Digital Printer Digital Printer Digital Printer Check and Cause Solution 1. 47.1mm : Transfer roller is contaminated. 1. Perform the OPC Cleaning Mode Print 2 or 3 times. Run Self-Test to remove the contamination from the transfer roller. Note. Replace the transfer roller if contaminated severely. 2. 75.4mm : Pressure roller is contaminated. 2.
Troubleshooting 7.4 Fax & Phone Problems 7.4.1 No Dial Tone • Description There is no dial tone when the On-Hook dial button is pressed. Check and Cause Solution 1. Check that the telephone line cord supplied with the set is connected to TEL LINE correctly. 1. If the telephone cord is OK but there is no dial tone, try plugging a normal telephone into the wall socket. I this is OK then replace the LIU B'd. 2. Listen for a CLICK sound when the OHD key is pressed. 2.
Troubleshooting 7.4.3 Defective FAX FORWARD/RECEIVE • Description FAX FORWARD/RECEIVE is not functioning. Check and Cause Solution 1. Check that you can hear a dial tone by pressing OHD. 1. If MODEM testing is normal and there is no dial tone, then try replacing the LIU B'd. 2. Check that you can hear a RECEIVE tone when MODEM testing in TECH Mode. 2. If testing the MODEM shows a fault replace the Main B'd. 7.4.
Troubleshooting 7.4.5 Defective FAX RECEIVE (1) • Description FORWARD is functioning, but RECEIVE is not functioning or the received data is corrupt. Check and Cause Solution 1. Check if there is a NOISE line by pressing on-hook dial and listening 1. If you can hear a noisy line when using on-hook dial, replace or repair the telephone line. 2. Use a different fax machine to receive from the same sender (if possible on the same wall socket). 2. Replace the LIU. 7.4.
Troubleshooting 7.4.8 Defective FAX RECEIVE (4) • Description Received data is reduced by more than 50% in the printing. Check and Cause Check the FAX status of the forwarding side. Solution This is a problem with the sending fax machine. Correct the setting on the remote machine.. 7.4.9 Defective Automatic Receiving • Description The automatic receiving function is not working. Check and Cause 1. Check that the RECEIVE Mode is set to FAX MODE. Solution 1.
Troubleshooting 7.5 Copy Problems 7.5.1 White Copy • Description Blank page is printed out when copying. Check and Cause Solution 1. Check the Scanner Cover is properly closed. 1. Room light can pass through a thin original. 2. Check shading profile. 2. Redo shading profile in the tech mode. 3. Check white/black reference voltage on Main PBA. 3. Replace the Main PBA. 7.5.2 Black Copy • Description Black page is printed out when Copying. Check and Cause 7-20 Solution 1.
Troubleshooting 7.5.3 Abnormal noise • Description There is noise from the ADF when copying. Check and Cause Solution 1. Check the Scanner Motor, gearbox and rollers. 1. Check for correct assembly of gears and motor. Ensure no parts are fouling and there are no foreign objects in the mechanism or scanner path. Replace any worn parts 2. Check the Motor Driver on Driver PBA. 2. Replace the main PBA. 7.5.
Troubleshooting 7.6 Scanning Problems – Causes and Solutions 7.6.1 PC Scanning problems • Description Unable to scan using a PC. Check and Cause Solution 1. Check the Cable (USB or Parallel) is properly connected and that the printer can print correctly. 1. Reconnect the PC and printer, replace any faulty cables. If using a parallel cable, check that the parallel port is properly configured in the BIOS. 2. Check that the driver is installed properly. 2.
Troubleshooting 7.7 Toner Cartridge Service Only toner cartridges supplied by Samsung should be used. Printing defects or set damage caused by the use of non-approved toner cartridges or un-licensed toner refills are not covered by the guarantee. 7.7.1 Precautions on Safe-keeping of Toner Cartridge Excessive exposure to direct light for more than a few minutes may cause damage to the cartridge. 7.7.
Troubleshooting 7.7.3 Standard of guarantee for consumable parts. Please refer to User's Manual or Instructions on Fax/Printer Consumables SVC manual for the criteria for judging the quality of consumable parts the standard of guarantee on those parts. • Spotting a refilled cartridge by eye. One way security screws are used in the manufacture of the cartridge – check if these are damaged. 7.7.4 Error messages in the LCD window related to toner.
Troubleshooting 7.7.5 Signs and Measures of Poor toner cartridge Fault Light image and partially blank image (Cartridge life is ended.) Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer Signs • The printed image is light or dirty and untidy. • Parts of the image are not printed. • Periodically a "tick tick" noise occurs. Cause & Check 1. If the image is light or dirty and untidy - Shake the toner cartridge and then recheck. OK: Lack of toner, so the life is nearly expired.
Troubleshooting Fault White Black spot Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer Signs • Light or dark black dots on the image occur periodically. • White spots occur in the image periodically. Cause & Check Solution 1. If light or dark black dots occur at regular intervals this is because the toner cartridge rollers are contaminated with foreign substance or paper particles. (1)38mm interval : Charge roller (2)95mm interval : OPC cycle 1.
Troubleshooting Fault Ghost & Image Contamination Signs Cause & Check Solution • The printed image 1. The printed image is too light is too light or dark, or dark, or partially or partially contaminated black. contaminated black. (a) Check if foreign substance or toner are stuck to the • Totally terminals (point of contact) contaminated black. of the toner cartridge or set. (Black image (b) Check if the terminal printed out) assembly is normal. 1.
Troubleshooting 7.8 Software Problems – Causes and Solutions 7.8.1 The printer is not working (1) • Description While Power turned on, the printer is not working in the printing mode. Check and Cause Solution 1. Run Self-Test Mode: using the menu buttons print the test page. (Menu, Enter, Enter). 1. If the test print works that means there are no problems in the printer itself.
Troubleshooting 7.8.2 The printer is not working (2) • Description After receiving the print command there is no response at all or print speed is low due to wrong setup of the environment rather than malfunction of the printer itself. Check and Cause Solution 1. Ensure you have sufficient free hard disk space for the temporary work files created during printing. 1. Not working with the message 'insufficient printer memory' means there is a hard disk space problem rather than a printer RAM problem.
Troubleshooting 7.8.3 Abnormal Printing • Description Printing does not work – even after replacing the cable Printer does not work at all or strange fonts are printed, Check and Cause Solution 1. Set up the parallel port using CMOS SETUP. 1. Ensure that ECP (best) or SPP is selected in the CMOS (BIOS) setup. 2. Printer Driver Error. 2. Ensure that the correct driver is loaded. Use the driver supplied on the CD or downloaded from the Samsung web site.
Troubleshooting 7.8.4 SPOOL Error • Description SPOOL (simultaneous peripheral operations online) is the process Windows uses to manage print jobs. Jobs are processed and then stored on the hard disk until the printer is ready to accept them Check and Cause Solution 1. Insufficient space on the hard disk in the directory assigned for the basic spool. 1. Delete any unnecessary files to provide more space for spool storage. 2. If previous printing errors were not solved. 2.
Troubleshooting 7.9 Network Problem Troubleshooting 7.9.1 General Problems 7-32 Problem Solution Incorrect setup can cause network errors. Possibly the parameters in PortThru (the network card) are corrupted. Restart the system and reset the printer network settings to factory defaults using the printer front panel or by using SyncThru on your computer. SNMP Manager cannot access the printer. Using the SNMP manager computer try pinging the printer.
Troubleshooting 7.9.2 Windows Problems Problem Solution After installing PortThru the print server name is not displayed under New Print Server in SyncThru. 1. Verify that the printer power switch is turned on and the 'READY' message is displayed on the printer front panel. 2. Verify that the LAN cable is plugged into the PortThru card. 3. There are 2LEDs on the PortThru card. One should flash irregularly and the other should be on.
Troubleshooting 7.9.3 SyncThru Installation Problems 7-34 Problem Solution "File Transfer Error" message appears during the Installation process. 1. Make sure that any previously installed version of SyncThru is uninstalled. Restart your PC after uninstalling previous versions. 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.
Exploded View & Parts List 8 Up-date On August. 2. 2004 8. Exploded Views and Parts List 8.1 Main Assembly Exploded view ............................................................................... page(8-2) 8.2 Rx Drive Ass’y Exploded view ................................................................................ page(8-5) 8.3 ADF Assembly Exploded view ................................................................................ page(8-6) 8.4 OPE Assembly Exploded view .....................
8-2 1-3 SCX-4520 SCX-4720F SCX-4520 1-1 SCX-4720F 1-4 1-2 1-2 1 Toner Cartridge 22-8 22-13 21-2 22-5 0 22-9 22-10 22-6 22-4 22-7 22-1 22-3 22-2 21-4 21-3 21-1 20 21 22-12 22-11 7 19-1 15 22 3 19-3 19-4 24 4 25 19 18 10 19-2 9 6 12 16 8 17 17-1 5 23 13 2 17-2 27 11 26 23-2 23-1 14 SCF Exploded View & Parts List 8.
Exploded View & Parts List Main Assembly Parts List SA : Service Available O : Service available X : Service not available No. SEC.
Exploded View & Parts List Main Assembly Parts List SA : Service Available O : Service available X : Service not available No. SEC.
Exploded View & Parts List 8.2 RX Drive Assembly 0 8 6 7 1 9 4 2 5 3 4 5 RX Drive Assembly Parts List SA : Service Available O : Service available X : Service not available No. Description SEC.
Exploded View & Parts List 8.
Exploded View & Parts List ADF Assembly Continued.
Exploded View & Parts List ADF Assembly Parts List SA : Service Available O : Service available X : Service not available No. SEC.
Exploded View & Parts List ADF Assembly Parts List(cont.) SA : Service Available O : Service available X : Service not available No. Description SEC.
Exploded View & Parts List 8.
Exploded View & Parts List OPE Unit Assembly Parts List SA : Service Available O : Service available X : Service not available [SCX-4520 ] SEC.Code Q’ty SA 0 No.
Exploded View & Parts List 8.
Exploded View & Parts List Scanner Assembly Parts List SA : Service Available O : Service available X : Service not available No. Description SEC.
Exploded View & Parts List 8.6 Middle Cover Assembly 0 2 5 6 4 1 3 Middle Cover Assembly Parts List SA : Service Available O : Service available X : Service not available No. 8-14 Description SEC.
Samsung Electronics 46-2 46-1 47-2 73 50 47-1 46 74 47-3 26 47-4 47 78 75 47-5 29 56 76 45-1 45-3 27-2 27-3 45-2 43 17 39 27-1 67 77 45 44 32 34 27 25 1 42 33 41 40 28 30 21 71 Transfer Roller 24 58 37 38 49 25 20 51 23 31 36 62 5 5 22 61 7 18 5 19 19-1 72 49 19-2 15 65 63-1 55 63-2 1 14 13 69 68 65-4 65-2 63 65-1 6 11 54 65-3 58 61 10 71 16 3 8 70 9 12 4 0 2 ELA HOU-FRAME Unit Fuser Exploded View & Parts List
Exploded View & Parts List Frame Assembly Parts List SA : Service Available O : Service available X : Service not available No. SEC.
Exploded View & Parts List Frame Assembly Parts List(Cont.) SA : Service Available O : Service available X : Service not available No. Description SEC.
Exploded View & Parts List Frame Assembly Parts List(Cont.) SA : Service Available O : Service available X : Service not available No. 65 8-18 Description SEC.
Exploded View & Parts List 8.
Exploded View & Parts List Fuser Assembly Parts List SA : Service Available O : Service available X : Service not available No. SEC.
Exploded View & Parts List 8.
Exploded View & Parts List MP Assembly Parts List SA : Service Available O : Service available X : Service not available No.
Exploded View & Parts List 8.
Exploded View & Parts List Cassette Assembly Parts List SA : Service Available O : Service available X : Service not available No. 8-24 Description SEC.
42 1 39-3 38 39-8 0 Samsung Electronics 40 39-6 39-10 39-7 39-4 39-2 28 39-1 39-5 1-3 20 21 39-9 1-4 34 23 39 22 24 19 18 37 17 11 15 13 33 32 9 10 16 14 6 7 31 12 8 25 30 36 34 2 35 41 27 5 28 3 26 4 29 Exploded View & Parts List 8.
Exploded View & Parts List SCF(Option Cassette Frame) Assembly Parts List SA : Service Available O : Service available X : Service not available No. 8-26 Description SEC.
Exploded View & Parts List SCF(Option Cassette Frame) Assembly Parts List SA : Service Available O : Service available X : Service not available No. Description SEC.
Exploded View & Parts List MEMO 8-28 Service Manual Samsung Electronics
Appendix (Parts code) Update: 9/10/04 NO.
Appendix (Parts code) Update: 9/10/04 NO.
Samsung Electronics 3P PVC Control DRIVER SENSOR FLATEN MOTOR 600 DPI, COLOR CCD FLAT COVER ¡ Key Scan ¡ LCD/LED Drive ¡ MICOM OPE 14P LCD, 16*2 LINES TEA3718X 2EA ADF MOTOR TEA3718X 2EA FLATEN MOTOR DRIVER CCD DRIVING PART CIP4 AFE JPEG Codec RTC DMA Control MotorControl I/O PORT AFE I/F ImageProcesser CIP4 IEEE1284/USB2.
Connection Diagram 10 CN24 CN20 CN21 CN15 CN17 CN25 CN18 CN9 CN8 CN7 CN9 CN1 CN4 CN11 CN3 CN1 CN2 CN5 CN23 CN2 10.
Schematic Diagram 11. Schematic Diagrams 11.1 Main Board(1/16) Service Manual Samsung Electronics This Document can not be used without Samsung’s authorization.
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Schematic Diagram 11.6 SMPS_220V AR1 C3 DSS-601M F1 250V8A LF1 SW0610V C101 1KV2 22 C2 472MAA* 2 F2 250V3.15A LF2 CH925130 B101 TH1 8D-15 CON2-16 1/2W3.3K * 10 INL ET 24V(0.
Schematic Diagram 11.7 HVPS 5V 24V 5V R209 100K C115 104 IT201 R202 100 THV PWM CN2-#17 9 THV 4 R210 5.6KJ R201 430 THV-sen >> 5 + R203 2KJ 47K C201 MY2A473 1 7 D205 6KV C211 6KV221 D206 6KV C209 >> THV 6KV221 Q203 C2383 D203 D1NL20U R207 C205 330KJ MY- 2A471 C203 681 6 6KV THV 100K C202 102 5 R208 10K 4 R205 22K C210 6KV221 2 D204 7 6 - R204 C206 MY-2A104 U102/B KA324 Q202 945C-Y 11 Q201 A708-Y D201 1N4148 8 C212 2KV221 D202 D1NL20U ZD201 2.
ELECTRONICS This service manual is also provided on the web, the ITSELF system Samsung Electronics Co., Ltd. http://itself.sec.samsung.co.kr © Samsung Electronics Co.,Ltd. July 2004 Printed in Korea. VERSION NO. : 1.
