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Samsung SCX-4720F Service Manual

Scx-4720f series digital laser mfp
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See also: User Manual , Manual
SERVICE
DIGITAL LASER MFP
DIGITAL LASER MFP
SCX-4720F Series
SCX-4720F
SCX-4520
Manual
CONTENTS

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Summary of Contents for Samsung SCX-4720F

  • Page 1: Table Of Contents

    DIGITAL LASER MFP SCX-4720F Series SCX-4720F SCX-4520 SERVICE Manual 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 Parts List 9.

  • Page 2: Precautions

    High voltages and lasers inside this product are dangerous. This printer should only be serviced by a suitably trained and qualified service engineer. (2) Use only Samsung replacement parts There are no user serviceable parts inside the printer. Do not make any unauthorized changes or additions to the printer, these could cause the printer to malfunction and create electric shock or fire haz-ards.

  • Page 3: Caution For Safety

    Take care not to cut or damage the power cable or plugs when moving the machine. (9) Use caution during thunder or lightening storms. Samsung recommend that this machine be disconnected from the power source when such weather conditions are expected. Do not touch the machine or the power cord if it is still connected to the wall socket in these weather conditions.

  • Page 4: Handling Precautions

    1.2.4 Assembly / Disassembly Precautions Replace parts carefully, always use Samsung parts. Take care to note the exact location of parts and also cable routing before dismantling any part of the machine. Ensure all parts and cables are replaced correctly.

  • Page 5: Disregarding This Warning May Cause Bodily Injury

    Failure to do so could cause the printer to tip or fall possibly causing personal injury or damaging the printer. (5) Do not install the printer on a sloping or unstable surface. After installation, double check that the printer is stable. Service Manual Samsung Electronics...

  • Page 6: Esd Precautions

    2. Be sure to replace the battery with the same or 4. Dispose of used batteries according to the equivalent type recommended by the manufacturer. manufacture’s instructions. Service Manual Samsung Electronics...

  • Page 7: Reference Information

    • Spring Hook Standard : For general use • Tweezers Standard : For general home use, small type. • Cotton Swab Standard : For general home use, for medical service. • Software (Driver) installation CD ROM Service Manual Samsung Electronics...

  • Page 8: Acronyms And Abbreviations

    First Copy Out Time Read Only Memory firmware Second Cassette Feeder graphics device interface SMPS Switching Mode Power Supply ground SPGP Samsung Printer Graphic Processor Host Based Printing Samsung Printer Language Hard Disk Drive Spool Simultaneous Peripheral Operation Online high voltage Switch HVPS...

  • 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 shown below. (The image is 70% of the actual A4 size). 2.3.1 A4 5% Pattern Service Manual Samsung Electronics...
  • Page 10 Reference Information 2.3.2 A4 2% Pattern Service Manual Samsung Electronics...
  • Page 11 Reference Information 2.3.3 A4 IDC 5% Patten Service Manual Samsung Electronics...

  • Page 12: A4 Iso 19752 Standard Pattern

    Reference Information 2.3.4 A4 ISO 19752 Standard Pattern This test page is reproduced at 70% of the normal A4 size Service Manual Samsung Electronics...

  • Page 13: Wireless Lan

    The most of main wireless networking companies are attending and the main companies are Lucent technologies, Cisco, Intel/Symbol, 3Com, Enterasys (Cabletron), Compaq, IBM, Nokia, Dell, Philips, Samsung elec- tronic, Sony, Intersil, and so on. This mark certifies mutual compatibility among product has Wi-Fi (IEEE 802.1) and it is certified as a standard of...
  • Page 14 Reference Information MEMO Service Manual Samsung Electronics...

  • Page 15: 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, Fax, Copier, Print, Scan, ADF, Scan-to-Email (Through Smar...
  • Page 16 (System) + 2MB(Scan) = 20MB Type SDRAM Expand Memory Slot Type SDRAM DIMM - Option DIMM : 16, 32, 64, 128MB (SDRAM) - 100Pin SDRAM DIMM (Use only Samsung Memory parts made Specifically for this printer) Compression Technology Service Manual Samsung Electronics...

  • Page 17: Print Specification

    Specifications 3.2 Print Specification Items SCX-4520 SCX-4720F PRINT 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 Font Type 45 Scalable, 1 Bitmap Number Power Save Yes(5/10/15/30/45min.)

  • Page 18: Scan Specification

    Specifications 3.3 Scan Specification Items SCX-4520 SCX-4720F SCAN Scan Method Color CCD Scan Speed Linearity Approx. 75sec (USB 1.1) *USB 1.1, 300dpi, through ADF Gray Approx. 75sec (USB 1.1) Letter Size, Color Approx. 150sec (USB 1.1) Pentimum 41.xGHz, Scan Speed Linearity Approx.75sec (USB 1.1)

  • Page 19: Copy Specification

    Specifications 3.4 Copy Specification Items SCX-4520 SCX-4720F Copy Quality COPY Text 600x300dpi Selection or Text/Photo 600x300dpi Original Image type selection Photo 600x600dpi for Platen Mode Other FCOT Stand by Approx. 10 seconds:Platen Approx. 15 seconds:ADF From Cold Status 50 seconds...
  • Page 20 Specifications Items SCX-4520 SCX-4720F TELEPHONE Handset On hook Dial Search Yes (Phone Book) 1-Touch Dial 40EA (20 x shift) *20 x 2 Dedicated keys Speed Dial 200 locations(00~199) include 1-touch dials TAD I/F Tone/Pulse Selectable in Technical Mode Pause Auto Redial...

  • Page 21: Fax Specification

    Specifications 3.5 Fax Specification Items SCX-4520 SCX-4720F Compatibility ITU-T G3 Communication System PSTN/PABX Modem Speed 33.6Kbps TX Speed 3sec Compression MH/MR/MMR/JPEG Color Fax Yes(Send Only) Resolution 203*98dpi Fine 203*196dpi S.Fine 300*300dpi Scan Speed 2.5 sec/ LTR (ADF) Fine/S.Fine 5 sec/ LTR...
  • Page 22 Specifications 3.6 Other Specification Items SCX-4520 SCX-4720F Network Option Yes (Standard) Protocol SPX/IPX, TCP/IP, Ethertalk, SNMP, HTTP 1.1, DLC/LLC Operating System MS Windows 98/2000/XP/NT/Me, MAC (English only, no status monitor, web download only) Paper Handling Capacity( 20lbs) Main Tray 250sheets...
  • Page 23 Specifications Items SCX-4520 SCX-4720F Software Compatibility Win 3.x Win 95 Win 98 Win ME Win NT 4.0 Win 2000 Win XP English only web version Linux WHQL Yes for 2000 & XP Driver Printer GDI, PCL6, PCL5e (Std.), PostScript Level3 (Std.)
  • Page 24 Specifications MEMO Service Manual 3-10 Samsung Electronics...

  • Page 25: Summary Of Product

    Summary of Product 4. Summary of Product This chapter describes the functions and operating principal of the main components. 4.1 Printer Components 4.1.1 Front View Service Manual Samsung Electronics...

  • Page 26: Rear View

    ** 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. Service Manual Samsung Electronics...
  • Page 27 Summary of Product 4.1.3 Control Panel (SCX-4720F) Service Manual Samsung Electronics...
  • Page 28 Summary of Product Service Manual Samsung Electronics...
  • Page 29 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. 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.
  • Page 30 Allows you to save on toner by using less toner to print a document. Allows you to directly print files stored on a USB flash drive when it is inserted into the USB port in front of your machine. Service Manual Samsung Electronics...

  • Page 31: System Layout

    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.
  • Page 32 • Image Processor Specification 1.Operating frequency: 66MHz 2.Image sensor interface: 200/300/600 dpi CIS or CCD 3.Line time: Copy, FAX, Binary (Lineart, Halftone) PC Scan: 1.5ms/Line Color PC Scan (Grey, 256 Color, True Color): 4.5ms/Line 4.A/D conversion: 10bit conversion Service Manual Samsung Electronics...
  • Page 33 The controller detects the /HSYNC signal to adjust the vertical line of the image on paper. In other words after the /HSYNC signal is detected the image data is sent to the LSU to adjust the left margin on the paper. Service Manual Samsung Electronics...

  • Page 34: Toner Cartridge

    - Management of waste toner: Collect the toner using a Cleaning Blade - OPC Drum protecting Shutter: Yes - Classifying device for toner cartridge: ID is classified by interruption of the frame channel -430V -950V -580V Service Manual 4-10 Samsung Electronics...

  • Page 35: Main Pba

    SRAM (K6 R1 0 1 6 VID) U2 U SB HOS T (T DO T G2 4 2 ) U 14 8 U SB HOS T (T DO T G2 4 2 ) U 14 8 Service Manual 4-11 Samsung Electronics...
  • Page 36 • 2 Channel General Purpose DMA Controller for High Speed I/O • Dual Memory Bus Architecture • Operation Frequency : AHB Bus: 60MHz, Internal System Bus: 120MHz • Operation Voltage : 3.3V • POWER ON RESET TIME : Below 5.6ms Service Manual 4-12 Samsung Electronics...

  • Page 37: Flash Memory

    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.

  • Page 38: Sensor Input Circuit

    The motor driving circuit is activated when the Driver IC is enabled. An A3977 (Motor driver IC) is used in this case. The resistance Rs value of sensing and the voltage value of the V reference can be changed by the motor driving voltage value. Service Manual 4-14 Samsung Electronics...
  • Page 39 The HVPS part uses the 24V and outputs the high voltage for THV/MHV/BIAS and the outputted high voltage is supplied to the toner, OPC cartridge and transfer roller. Service Manual 4-15 Samsung Electronics...
  • Page 40 When the ZENER diode is disconnected a blank page is printed out. (It is the same when a ZENER diode is disconnected from OPC ground.) Service Manual 4-16 Samsung Electronics...
  • Page 41 Remark Stand-By 0.07A 0.4 A AVG:55 Wh PRINTING 0.14A 2.0 A AVG 350 Wh Sleep-Mode 0.01A 0.4A AVG : 20 Wh 4) Length of Power Cord : 1830 ± 50mm 5) Power Switch : Fitted Service Manual 4-17 Samsung Electronics...

  • Page 42: Fuser Ac Power Control

    Triac is therefore off, and thus the heat lamp is turned off. 1) Triac (THY1) feature - 12A, 600V SWITCHING 2) Phototriac Coupler (PC3) - Turn On If Current : 15mA ~ 50mA(Design: 16mA) - High Repetive Peak Off State Voltage : Min 600V Service Manual 4-18 Samsung Electronics...
  • Page 43 This voltage is fed back into the set through the A/D converter. Based on this fed back value the PWM cycle is changed to maintain the required transfer voltage Service Manual 4-19 Samsung Electronics...
  • Page 44 Error Description Polygon motor error When the polygon motor’s speed doesn’t become a normal Hsync error The polygon motor’s speed is normal, but the Hsync signal is not created. Service Manual 4-20 Samsung Electronics...

  • Page 45: Usb Host

    (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. Service Manual 4-21 Samsung Electronics...

  • Page 46: Fax Section

    /DTR TXA2 Line RING /DSR** Interface /RI* RINGD /TALK FM336 Modem EYEXY Optional EYESYNC Eye Pattern /D[x:0] EY RCLK Generator Host RS[4:0] Processor /RESET Speaker TXRQ* SPKR Amplifier RXRQ** +3.3V Power Supply AGND DGND Service Manual 4-22 Samsung Electronics...

  • Page 47: Liu Pba

    The Telephone circuit is consists of ring detection circuit, speech circuit, external hook detection circuit, and recall circuit. TRANS MATCHING T1 TRANS MATCHING T2 RELAY RE1 VARISTOR VAR1/VAR2 JACK MODULAR(TEL) MJ1 JACK MODULAR(EXT) MJ2 Service Manual 4-23 Samsung Electronics...

  • Page 48: 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. • The Transformer circuit insolates the fax machine electrically from the PSTN. Service Manual 4-24 Samsung Electronics...

  • Page 49: On Hook State

    • Matching (Input AC Impedance) : 600 Ω±30% for 300Hz ~ 3.4KHz • Minimum Line Current detecting Off Hook : 20mA(Handset Hook Off) 15mA(external Handset Hook Off) • Minimum Line Current for DP Dial transmission : 20mA ~ 120mA Product Margin : 20mA and over Service Manual 4-25 Samsung Electronics...
  • Page 50 • DP (Dial Pulse) Dial - Make / Brake Ratio : 40 : 60 - Pulse Speed : 10 ± 0.8 pps, Minimum Pause : above 60 msec • DTMF Signal - Coding Format - Transmission Level Service Manual 4-26 Samsung Electronics...
  • Page 51 Summary of Product MEMO Service Manual 4-27 Samsung Electronics...

  • Page 52: Disassembly And Reassembly

    4. Use a flat and clean surface. 5. Replace only with authorized components. 6. Do not excessive force on components made of plastic, they may break. 7. Make sure all components are in their proper position. Service Manual Samsung Electronics...

  • Page 53: 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. Rear Cover Service Manual Samsung Electronics...
  • Page 54 RH side cover to the right, taking care not to damage the clips, to remove it from the Frame Assembly. Side Cover (RH) Service Manual Samsung Electronics...

  • Page 55: Front Cover

    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. Service Manual Samsung Electronics...
  • Page 56 2. Remove the 2 screws securing the Scanner Ass'y, as shown below. 5. SCX4520 only. Lift the Platen Cover upward to remove it. 3. Remove the 5 connectors and the ground wire screw from the main PBA as shown below. Service Manual Samsung Electronics...
  • Page 57 Clips 7. Lift the front part of the COVER-OPE FRONT to release the hook connecting the cover with the scan assembly. <SCX-4520> Clips COVER-OPE FRONT <SCX-4520> <SCX-4720F> COVER-OPE FRONT <SCX-4720F> Service Manual Samsung Electronics...
  • Page 58 Upper upward and remove it. 13. Squeeze the spring to release the tension in the Belt and lift from the pulleys as shown below. Scan Upper Spring Belt 11. Remove the CCD Cable, as shown below. CCD Cable Service Manual Samsung Electronics...
  • Page 59 Assembling Scanner Module When re-assembling the scanner module, 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. Service Manual Samsung Electronics...
  • Page 60 15. Remove the 3 screws and take out the Motor 17. Unlatch the Open Sensor and remove it, as shown Bracket. below. Motor Bracket Open Sensor 16. Unplug the connector from the Open Sensor Ass'y. 18. Remove the CCD lock Unlock CCD Lock Lock Service Manual Samsung Electronics...
  • Page 61 Caution. When working on the ADF Motor Ass’y take harness and ferrite are properly located and care not to contaminate any of the rubber are clear of the motor fan and white bar clip. surfaces with grease. Service Manual 5-10 Samsung Electronics...
  • Page 62 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. Service Manual 5-11 Samsung Electronics...
  • Page 63 - Scanner Ass’y (see page 5-5) 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. Contact Rubber Service Manual 5-12 Samsung Electronics...
  • Page 64 Precautions OPE Unit(SCX-4720F) 1. Before you remove the OPE Unit, you should remove: 4. Remove the Key Pad from the OPE Cover. - Rear Cover (see page 5-2) - Side Cover (LH, RH) (see page 5-3) - Scanner Ass’y (see page 5-5) 2.
  • Page 65 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. Take care to release the Shield Ass’y locating pegs and lift the Top Cover out. Middle Cover Service Manual 5-14 Samsung Electronics...
  • Page 66 Controller Shield Assembly to the Middle Cover and frame and remove the assembly. Controller Shield Ass y Bracket 3. If fitted remove the 2 screws connecting the NIC card to the Controller Shield Assembly and remove the card. NIC Card Service Manual 5-15 Samsung Electronics...
  • Page 67 2. Unplug the Exit, AC and Fan connectors. Unplug the LIU connector if fitted. Exit Connector Main Connector AC Connector Engine shild Ass y 4. Remove the 2 screws to remove the exit board. Fan Connector Exit Board Service Manual 5-16 Samsung Electronics...

  • Page 68: Smps And Liu

    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. Then lift the LIU out, as shown below. Service Manual 5-17 Samsung Electronics...
  • Page 69 Remove 2 screws to remove the guide input. 3. Remove the 2 bolts securing the Thermostat. Then lift Claw the Thermostat out taking care not to loose the 2 nuts. Fuser Cover Bolts Thermostat Nuts guide Input Service Manual 5-18 Samsung Electronics...
  • Page 70 1. Before you remove the Fan, you should remove: 2. Unplug the connector from the SMPS and remove the - Rear Cover (see page 5-2) one screw. Then take out the Fan. - Side Cover (RH) (see page 5-3) DC Fan Service Manual 5-19 Samsung Electronics...

  • Page 71: Crum Board

    - Side Cover (LH, RH) (see page 5-3) - Scanner Ass’y (see page 5-5) - Front Cover (see page 5-4) CRUM Board - Middle Cover (see page 5-14) - LSU (see page 5-20) Service Manual 5-20 Samsung Electronics...

  • Page 72: Cover Mid Front

    2 clips in the center. This cover is fragile - Rear Cover (see page 5-2) take care when removing it. - Side Cover (LH, RH) (see page 5-3) - Middle Cover (see page 5-14) clips Cover Mid Front Service Manual 5-21 Samsung Electronics...
  • Page 73 5. Unlatch the Bushing and remove it. Then lift the Transfer Roller out, as shown below. Transfer Roller Bushing 3. Unplug the PTL Holder connector, then remove the PTL Holder and PTL Lens, as shown below. PTL Lens PTL Holder Service Manual 5-22 Samsung Electronics...
  • Page 74 5. Remove the Feed Gear2. Guide Paper Front Feed Gear2 3. Remove the screws on the right and left sides of the guide paper to remove the guides and the spring as shown below. Screw Spring Guide Paper Service Manual 5-23 Samsung Electronics...
  • Page 75 Precautions 6. Remove the Feed Gear1 Ass'y. 7. Pull up the Feed Roller and Feed Roller1. Feed Roller Feed Gear1 Ass y Feed Roller1 Service Manual 5-24 Samsung Electronics...
  • Page 76 When replacing either the MP pick up roller or main cassette pick up roller only, it is possible to do this by turning the set over after removing the cassette and the processor. See page 5-26 Bush Service Manual 5-25 Samsung Electronics...
  • Page 77 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 around the drive shaft until it can be removed. Service Manual 5-26 Samsung Electronics...

  • Page 78: Alignment And Adjustments

    Much of this chapter is also included in the user's guide. 6.1 Paper path Scanner Part ADF-Roller Pickup-Roller Doc-Paper(30Sheets) ADF-Idle Roller Sensor-R Sensor-Regi Sensor-Regi Sensor-Doc Sensor-Doc Sensor-Doc Exit-Roller Feed-Roller Sensor-Scan Sensor-Scan Sensor-Scan White-Sheet White-Sheet hite-Sheet CCD-Module Engine Part L S U Fuser Toner Cartridge Service Manual Samsung Electronics...

  • Page 79: Printer Paper Path

    Engine Part L S U Fuser Toner Cartridge Paper Input (Cassette) Paper Empty Sensor (Cassette) Paper Input (Manual Feeder) Paper Feeding Sensor Paper Out (Face Down) Paper Exit Sensor Paper Empty Sensor (Manual) Service Manual Samsung Electronics...

  • Page 80: Clearing Paper Jams

    (in the fuser area or around the toner cartridge) (in the paper exit area) L S U Fuser Toner Cartridge EXIT Sensor MP Sensor Feed Sensor Empty Sensor MP Tray Jam (in the manual feed area) Service Manual Samsung Electronics...

  • Page 81: Clearing Document Jams

    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. Service Manual Samsung Electronics...

  • Page 82: Adf Exit Misfeed

    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. Service Manual Samsung Electronics...
  • Page 83 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 see the paper in this area, skip to the fuser area around the toner cartridge. Service Manual Samsung Electronics...
  • Page 84 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. Service Manual Samsung Electronics...
  • Page 85 3) If there is any resistance when you pull the paper or 6) Open and close the front cover to resume printing. the paper is not seen in the front output tray, open the rear cover. Service Manual Samsung Electronics...
  • Page 86 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. Service Manual Samsung Electronics...

  • Page 87: Paper Setting

    User Guide and are not included here. 6.Reports 1.Paper Setting 2.Copy Setup System Data Paper Tray Change Default Paper Size Timeout 9.Maintenance 8.Machine Setup Clean Drum Language Clear Memory Power Save CCD Power Save USB Mode Service Manual 6-10 Samsung Electronics...
  • Page 88 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 2.Copy Setup 3.Fax Setup Receive Mode...

  • Page 89: Tech Mode

    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. 6.4.2 Setting-up System in Tech Mode Service Manual 6-12 Samsung Electronics...

  • Page 90: Data Setup

    India Brazil France Oman Italy Poland Spain Bangladesh Kuwait Netherlands Moroco Belgium Algeria Country Portugal Pakistan Sweden Norway Bahrain Denmark Srilanka Finland Saudi Arabia Switzerland Chile Greece Peru Ireland Argentina Turkey Hungary Romania Bulgaria Czech Service Manual 6-13 Samsung Electronics...

  • Page 91: Flash Upgrade

    1. The Sending and Receiving fax machines MUST be the same model. 2. The sending fax must be set up in ECM mode and the Receiving fax memory must be 100%. If not the function will not work. Service Manual 6-14 Samsung Electronics...

  • Page 92: Machine Test

    FILE will be print out. 4. If the printed image is different to the sample image shown the CCD is defective. NOTICE : When you test the CCD, make sure that the cover is closed. Service Manual 6-15 Samsung Electronics...

  • Page 93: 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. Service Manual 6-16 Samsung Electronics...

  • Page 94: Engine Test Mode

    1 : On, 2 : Off (+1300V ± 20V) THV ADC 1300V 1 : On, 2 : Off (ADC Value : 101 ± 5) THV ADC 600V~3500V 1 : On, 2 : Off (Compare each ADC Value) Service Manual 6-17 Samsung Electronics...
  • Page 95 42.Dev Bias Test control of the HVPS is functioning correctly. Dev Bias On/Off 43.THV EN/NEG Test THV EN/NEG On/Off 44.THV ON(1300V) THV On/Off 45.THV ADC 1300V ADC value displayed. 46.THV ADC 600V~3500 ADC value displayed. Service Manual 6-18 Samsung Electronics...

  • Page 96: Identify Sale Date

    Press MENU, #, 1, 9, 3, # in sequence. The Firmware version is displayed on the LCD. Press 1( in the number keypad) : The LCD display shows "Updated date" Press 2( in the number keypad) : The LCD display shows "Product first use date" Service Manual 6-19 Samsung Electronics...

  • Page 97: Consumables And Replacement Parts

    Environmental conditions (temperature, humidity, dust etc.) and actual use can cause these figures to vary. COMPONENT REPLACEMENT CYCLE ADF Rubber 20,000 Pages Pick-up Roller 150,000 Pages Friction Pad 60,000 Pages Transfer Roller 60,000 Pages Fuser Unit 80,000 Pages Toner Cartridge 3,000 Pages (A4 ISO 5% Pattern) Service Manual 6-20 Samsung Electronics...

  • Page 98: Abnormal Image Printing And Defective Roller

    Black spot Supply Roller 44.9mm Horizontal density band Develop Roller 35.2mm Horizontal density band Transfer Roller 47.1mm Black side contamination/transfer fault Heat Roller 77.8mm Black spot and fuser ghost Pressure Roller 75.4mm Black side contamination Service Manual 6-21 Samsung Electronics...

  • Page 99: Error Messages

    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. Load paper in the manual feeder correctly. Cancel ? 1. Yes 2. No (Only SCX-4720F) Meaning: While storing the document in memory the memory has become full. Solution: To cancel the fax job, press the ‘1’...
  • Page 100 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.
  • Page 101 Take out the toner cartridge and gently shake it. By doing this, you can temporarily reestablish printing operations. Or Replace the toner cartridge with a new one for the best print quality. Priority Fax Function Full (Only SCX-4720F) Meaning: The priority fax job queue is full.

  • Page 102: Troubleshooting

    6 If the paper feeds into the printer and 6. Check the SMPS PBA, Main PBA and Jam 0 occurs, perform Tech Mode to all connections. Replace any faulty check feed sensor. parts or the Service Manual Samsung Electronics...
  • Page 103 Check all ribs, claws and springs. • It occurs when the Spring of a Guide claw is broken or damaged. • It occurs when the Heat-Roller or Pressure-Roller is seriously contaminated with toner. Service Manual Samsung Electronics...

  • Page 104: Paper Rolled In The Fuser

    Clean the surface of the rollers with IPA or water 2. Damaged or deformed ribs, claws or springs. 2. Check for damage or deformation of the print claws and the holder plate claws, and repair or replace as appropriate. Service Manual Samsung Electronics...

  • Page 105: Paper Rolled On The Opc Drum

    1. Check if the ADF rubber or HOLDER rubber are 1. Replace the contaminated or damaged part. damaged or contaminated. 2. Check if the ADF Ass'y document sensors (3 paper 2. If you cannot confirm the damaged part with the sensors) are working correctly. Service Manual Samsung Electronics...
  • Page 106 2. Check that there is an audible key click when a key is 2. If the fault remains replace the OPE Ass’y and the pressed. Main board in sequence. Service Manual Samsung Electronics...
  • Page 107 The paper empty message does not appear in the LCD when the paper cassette is empty. Check and Cause Solution 1. Deformed paper sensor actuator or faulty sensor. 1. Replace the defective actuator. 2. SMPS PBA or Main PBA is defective 2. Replace the SMPS PBA or MAIN PBA as appropriate Service Manual Samsung Electronics...

  • Page 108: Cover Open

    1. Use TECH mode(“cover sensor test”) to check cover switch operation. Check and replace switch if necessary. 2. Check the connector and cables between Switch and main PBA. 2. Replace the Main Control board or Cover Open S/W as necessary. Service Manual Samsung Electronics...

  • Page 109: Defective Motor Operation

    When printing, vertical lines are not straight. Check and Cause Solution 1. Check stability of 24V supply to LSU. 1. 24V stable - Replace LSU. 24V unstable replace SMPS, if the problem persists replace the main PBA. Service Manual Samsung Electronics...

  • Page 110: Wrong Print Position

    Remove if found. 5. Contamination of the OPC drum. 5. If the problems are not solved, replace the toner cartridge. 6. Depression or deformation of the surface 6. Replace the transfer roller. of the transfer roller Service Manual Samsung Electronics...

  • Page 111: Horizontal Black Bands

    If the roller's life is expired, transfer roller's life has expired. replace it. Note. Cleaning the inside of the set to remove excess toner particles or paper dust will reduce the occurrence of this problem.. Service Manual 7-10 Samsung Electronics...

  • Page 112: Light Image

    Note if 1 and 2 do not resolve the problem Digital Printer and the problem persists replace the HVPS. 3. VD0 signal of the Main PBA is Low state. 3. Replace the LSU Unit or Main PBA. Service Manual 7-11 Samsung Electronics...

  • Page 113: Uneven Density

    4. Is the movement(Up and Down) of 4. Clean the transfer roller bushes. the transfer roller smooth? 5. Is the HVPS normal? 5. Clean the high voltage charge terminals. If this does not resolve the problem replace the HVPS. Service Manual 7-12 Samsung Electronics...
  • Page 114 Digital Printer OHP, a higher transfer voltage is required. Remember to set back to normal paper after Digital Printer use. Digital Printer Digital Printer Service Manual 7-13 Samsung Electronics...
  • Page 115 2. If the transfer roller is contaminated, run Digital Printer stains on the face of page will occur. PC Cleaning Mode Print 2 or 3 times and Digital Printer then perform Self-Test 2 or 3 times to remove contamination. Service Manual 7-14 Samsung Electronics...
  • Page 116 3. When the printer turns on, several blank pages print. Check and Cause Solution 1. Abnormal solenoid. 1. Perform the engine self test using TECH Mode to check if the Solenoid is normal. If the problem persists replace the main Service Manual 7-15 Samsung Electronics...

  • Page 117: No Dial Tone

    4. Check that the SPEAKER is connected correctly. 4. Use Tech mode / Modem Test to check that the speaker and amplifier are working. Replace the LIU and Main B'd in sequence Notes: Product supports MF DIAL type only. Service Manual 7-16 Samsung Electronics...

  • Page 118: Defective Fax Forward

    2. Replace LIU. forwarded faxes by using a different sending fax machine (preferably from the same wall socket). 3. Check the cable between the set and the wall 3. Replace the line cord. socket for damage. Service Manual 7-17 Samsung Electronics...
  • Page 119 Solution Check that the RECEIVE Mode is set to FAX MODE. If the fault persists even when the RECEIVE Mode is changed to FAX MODE then replace the LIU and the Main B'd in sequence. Service Manual 7-18 Samsung Electronics...

  • Page 120: Defective Automatic Receiving

    1. If the RECEIVE Mode is set to the TEL MODE, reset it MODE. to the FAX MODE. 2. Even after the RECEIVE Mode is changed to the FAX Mode, the problem persists then try to replace the LIU and the Main B'd in sequence. Service Manual 7-19 Samsung Electronics...

  • Page 121: Copy Problems

    Black page is printed out when Copying. Check and Cause Solution 1. Check for CCD problem on the Main PBA. 1. Check the CCD harness is properly connected. 2. Check shading profile. 2. Redo shading profile in the tech mode. Service Manual 7-20 Samsung Electronics...

  • Page 122: Defective Image Quality

    2. Check the gap between original and scanner 2. A gap of more than 0.5 mm can cause a blurred glass. image. Ensure rollers and cover close correctly. Replace as necessary. 3. Check printing quality. 3. See "Print" troubleshooting. Service Manual 7-21 Samsung Electronics...

  • Page 123: Pc Scanning Problems

    6.15) and examine the waveform printout. CCD Ass'y. 2. Check if the resolution is set too low in PC Scan 2. Teach the user about scanner resolution – refer to options. (Refer to User's Manual.) the User Guide. Service Manual 7-22 Samsung Electronics...

  • Page 124: Service For The Life Of Toner Cartridge

    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.

  • Page 125: Toner Low

    It is therefore necessary to replace the cartridge even though there may be toner left in it. When this message occurs there are approximately 1,000 pages left. 7.7.4.4 Replace Drum - Explanation: The toner cartridge mechanical life is expired. - Solution: Replace the cartridge. Service Manual 7-24 Samsung Electronics...
  • Page 126 (a) Check that the terminals problem persists replace the (contact points) of the toner cartridge. cartridge and the set are clean. (b) Check that the terminals (contact points) of the toner cartridge and the set are not damaged. Service Manual 7-25 Samsung Electronics...
  • Page 127 (contact point) of the toner toner cartridge is recycled over cartridge and the set are not 2 times. damaged. If ‘nearly empty’ cartridges are collected for re-use this is judged as recycling the toner cartridge. Service Manual 7-26 Samsung Electronics...
  • Page 128 (a) Check if foreign substances are stuck to the terminal (point of contact) of the toner cartridge or set. (b) Check if the terminal assembly is normal. (Especially check the developer roller terminal.) Service Manual 7-27 Samsung Electronics...
  • Page 129 9and perhaps even uninstalling their dri- vers) to ensure the printer works by itself. If you are using a USB hub try connecting directly to the back of the PC instead. Service Manual 7-28 Samsung Electronics...
  • Page 130 Turn the PC and printer off, and reboot the system to print again. If not solved, double-click the printer in my computer If the regular fonts are not printed this time again. the cable must be defective so replace the cable with new one. Service Manual 7-29 Samsung Electronics...

  • Page 131: Abnormal Printing

    2. Ensure that the correct driver is loaded. Use the driver supplied on the CD or downloaded from the Samsung web site. DO NOT use the Microsoft driver supplied with the Windows operating system. If the printer is a GDI or SPL type printer ensure that...

  • Page 132: Spool Error

    If there is a problem with the printer (out of toner, offline, out of paper etc.) the job may take a long time to delete as it must wait for a time out. Service Manual 7-31 Samsung Electronics...

  • Page 133: General Problems

    1. Check that the protocol settings on your computer are correct. adding a port and the printer doesn't function. 2. Assign an IP Address to PortThru using the front panel, SyncThru or browser methods (see the user guide). Service Manual 7-32 Samsung Electronics...

  • Page 134: Windows Problems

    If not check that the printer drivers are installed correctly 2. If the printer can print via a local connection check Printer Properties / Ports and ensure that a TCP/Ip port has been allo- cated to the printer. Service Manual 7-33 Samsung Electronics...

  • Page 135: Syncthru Installation Problems

    "sammon.dll" file in the windows\system32 directory then restart the spooler service and reinstall SyncThru. 'Unable to add the Port list of Samsung ports' Verify that your PC restarts after installing SyncThru. message appears when you add a port.

  • Page 136: Exploded Views And Parts List

    This format is used throughout Samsung on all product ranges. Typically it is used for small components and electronic parts. This format is controlled by individual Samsung Divisions and is used on specific products, typically for mechanical parts. Type 2 format part numbers fall into 2 categories: Assemblies consisting of 2 or more parts.

  • Page 137: Main Assembly

    Exploded View & Parts List 8.1 Main Assembly Service Manual Samsung Electronics...
  • Page 138 Exploded View & Parts List Main Assembly Parts List SA : Service Available O : Service available X : Service not available Description SEC.Code Q’ty Remark SCX-4520 SCX-4720F ELA HOU-SCAN JC96-03181A SCX-4520 ELA HOU-SCAN JC96-03184A SCX-4720F ELA HOU-ADF JC96-03169A ELA HOU-OPE...
  • Page 139 SCREW-TAPTITE 6003-000196 22-13 SCREW-TAPTITE 6003-000264 MEA -COVER REAR JC97-02018A 23-1 COVER-M-REAR JC63-00503A 23-2 COVER-FACE UP JC63-00504A CBF HARNESS ENGINE JC39-00240C CBF HARNESS-LSU GND JC39-00375A ELA HOU-FUSER 110V JC96-03210A 110V ELA HOU-FUSER 220V JC96-03260A 220V FAN-DC JC31-00025A Service Manual Samsung Electronics...
  • Page 140 O : Service available X : Service not available Description SEC.Code Q’ty Remark ELA UNIT-RX DRIVE JC96-03078A BRACKET-GEAR MAIN JC61-00891A GEAR-RDCN 53/26 JC66-00388A GEAR-RDCN 113/33 JC66-00706A GEAR-RDCN 57/18 JC66-00389A WASHER-PLAIN 6031-000023 BRACKET-MOTOR MAIN R2 JC61-00916A GEAR-RDCN 103/41 JC66-00390A GEAR-RDCN 90/31 JC66-00392A MOTOR STEP-MAIN JC31-00037A Service Manual Samsung Electronics...

  • Page 141: Adf Assembly

    1-2-4 1-2-1 1-2-2 1-2-3 3-14 2-16 3-18 3-11 3-18 3-16 3-15 3-17 3-10 3-16 3-13 3-18 3-20 3-19 3-21 2-15 3-12 3-19 2-15 2-17 2-19 2-22 2-18 2-12 2-10 2-22 2-19 2-20 2-13 2-20 2-21 2-14 Service Manual Samsung Electronics...
  • Page 142 Exploded View & Parts List ADF Assembly Continued. 4-3-2 4-3-3 4-3-5 4-3-4 : Service Part *MEA-COVER PLATEN (JC-97-02024A) 4-3-1 Service Manual Samsung Electronics...
  • Page 143 2-22 SPRING ETC WHITE BAR JC61-00548A ELA HOU-ADF MOTOR JC96-03065A BRACKET-GEAR ADF JC61-00892A MOTOR STEP-ADF JC31-00036A GEAR-CLUTCH 29 JB66-00101A PMO-WHITE CLUTCH SUB 29 JB72-00844A GEAR-CLUTCH 39 JC66-00322A RING-C 6044-000159 GEAR-IDLE 35 ADF JC66-00458A GEAR-40/21 ADF JC66-00456A Service Manual Samsung Electronics...
  • Page 144 ICT-SHAFT PINCH JF70-40521B MEA UNIT-HINGE JC97-01707A RPR-ROLLER EXIT IDLE JC73-00091A SHAFT-IDLE FEED JC66-00558A MEA-COVER OPEN R2 JC97-02023A COVER-M-ADF OPEN JC63-00498A PMO-GUIDE PAPER JB72-00843A DAMPER-PICKUP ADF JC66-00726A MEA UNIT-PICKUP JC97-01962A STOPPER-M-PICKUP ADF JC61-00963A GEAR-ADF 38 JB66-00103A RING-C 6044-000159 Service Manual Samsung Electronics...
  • Page 145 Exploded View & Parts List 8.4 OPE Unit Assembly (SCX-4520) (SCX-4720F) Service Manual 8-10 Samsung Electronics...
  • Page 146 KEY-M-TONER SAVE JC64-00058A KEY-M_RESOLUTION_R2 JC64-00059C KEY-M-DIRECT PRINT JC64-00155A KEY-M-SCAN TO JC64-00157A RUBBER-COPY/SCROLL JC73-00189A RUBBER-COPY_3IN1 JC73-00192A PBA SUB-OPE JC92-01625A SCREW-TAPTITE 6003-000196 [SCX-4720F ] Description SEC.Code Q’ty Remark ELA HOU-OPE 4IN1 JC96-03174A COVER-M-OPE SEC JC63-00495A WINDOW-LCD_R2_SEC JC64-00171A KEY-M_COPY_R2 JC64-00054C KEY-M-STOP JC64-00055A KEY-M_SCROLL_R2...

  • Page 147: Scanner Assembly

    Exploded View & Parts List 8.5 Scanner Assembly 1-3-1 1-3-2 1-3-4 1-3-3 2-15 2-15-4 2-15-3 2-15-7 2-15-6 2-15-5 2-15-8 2-10 2-11 2-15-1 2-13 2-12 2-16 2-15-2 2-14 Service Manual 8-12 Samsung Electronics...
  • Page 148 HOLDER-CCD JC61-00894A 2-15 ELA HOU-SCAN MOTOR JC96-03069A 2-15-1 BRACKET-SCAN MOTOR R2 JC61-00895A 2-15-2 MOTOR STEP-SCAN JB31-00011A 2-15-3 GEAR-REDUCTION JC66-00530A 2-15-4 GEAR-IDLE JB66-00083A 2-15-5 GEAR-TIMING JC66-00531A 2-15-6 PMO-HOLDER BELT JB72-00764A 2-15-7 RING-E 6044-000125 2-16 CBF-HARNESS-PLATEN JC39-00362A Service Manual 8-13 Samsung Electronics...

  • Page 149: Middle Cover Assembly

    O : Service available X : Service not available Description SEC.Code Q’ty Remark ELA HOU-COVER MIDDLE JC96-03247A COVER-M-MIDDLE R2 JC63-00502A COVER-REAR UPPER JC63-00388B PMO-STACKE_RX JC72-00973A BUSH-F/DOWN R2 JC61-00902A CBF HARNESS-OPE JC39-00350A PBA SUB-USB HOST JC92-01636A Service Manual 8-14 Samsung Electronics...

  • Page 150: Frame Assembly

    Exploded View & Parts List 8.7 Frame Assembly Service Manual 8-15 Samsung Electronics...
  • Page 151 JC72-00382B SHAFT-FEED JC66-00398A MEA UNIT-PICKUP JC97-01926A 27-1 SPONGE-ROLLER PICK_UP JC72-01231A 27-2 HOUSING-PICK UP_R2 JC61-00909A 27-3 HOUSING-PICK UP2_R2 JC61-00910A IPR-P-EARTH TRANSFER JC70-00307A HOLDER-PTL R2 JC61-00907A LENS-PTL JC67-00027A PMO-BUSHING_TR(L) JC72-00102A SPRING ETC-TR L HAWK JC61-00047A ROLLER-FEED JC66-00598A Service Manual 8-16 Samsung Electronics...
  • Page 152 JC66-00396A SPRING-TS 6107-001164 SPRING-TS 6107-001165 IPR-P-TERMINAL DEVE KEY JC70-00340A GROUND-TERMINAL DEVE JC63-00458A PBA SUB-PTL JC92-01620A HOLDER-TERMINAL R2 JC61-00908A HOLDER-ACT MANUAL R2 JC61-00912A HOLDER-BEARING EXIT F/DOWN JC61-00829A GEAR-EXIT F/DOWN JC66-00038A ROLLER-EXIT F/DOWN JC66-00378A RMO-RUBBER EXIT JC73-40915A Service Manual 8-17 Samsung Electronics...
  • Page 153 GUIDE-SUB FRONT JC61-00917A PBA-SUB-CRUM JC92-01605A CBF HARNESS CRUM2 JC39-00356A PBA SUB-EXIT SENSOR JC92-01604A GROUND-SHIELD R2 JC63-00402A LABEL(R)-HOT CAUTION,KME JC68-00317A BUSH-M-PICK_UP L JC61-00586A SHAFT-P-PICK_UP JC66-00399A STOPPER-PICK UP_R2 JC61-00915A PMO-IDLE PICK_UP JC72-00982A BUSH-M-PICK_UP R JC61-00587A SHAFT-CORE JC66-00720A Service Manual 8-18 Samsung Electronics...
  • Page 154 Exploded View & Parts List 8.8 Fuser Assembly Service Manual 8-19 Samsung Electronics...
  • Page 155 GUIDE-INPUT R2 JC61-00889A SPRING-TS 6107-001165 NUT-HEXAGON 6021-000222 BUSH-HR L_R2 JC61-00888A PLATE-P-CLAW JC61-00605A GEAR-FUSER R2 JC66-00695A LAMP-HALOGEN 110V 4713-001182 110V LAMP-HALOGEN 220V 4713-001183 220V LABEL(R)-LV FUSER JC68-00408A SCREW-TAPTIEE 6003-000196 SCREW-ASS'Y MACH 6006-001193 SCREW-TAPTIEE 6003-000269 BRUSH-ANTISTAIC JC75-00095A Service Manual 8-20 Samsung Electronics...
  • Page 156 Exploded View & Parts List 8.9 MP Assembly Service Manual 8-21 Samsung Electronics...
  • Page 157 JC72-00982A PMO-M-ACT EMPTY MP JC72-01338A RPR-FRICTION PAD JC73-00140A SPRING-ETC-EXIT ROLL FD JC61-70911A RPR-PAD CASSETTE JC73-00141A SPRING-ES 6107-001237 SHEET GUIDE PAPER R2 JC63-00545A SHAFT-P-CORE JC66-00720A SHEET GUIDE MP JC63-00448A SPRING-CS 6107-001167 SPRING-ES 6107-001047 PHOTO INTERRUPTER 0604-001095 Service Manual 8-22 Samsung Electronics...
  • Page 158 Exploded View & Parts List 8.10 Cassette Assembly Service Manual 8-23 Samsung Electronics...
  • Page 159 RPR-FRICTION PAD JC73-00140A IPR-PLATE PAD JC70-00314A SPRING ETC-EXIT ROLL FD JC61-70911A COVER-M-SUB CASSETTE R2 JC63-00490A PMO-PLATE_LOCKER JC72-00972A SPRING ETC-LOCKER,PLATE JG61-70531A ADJUST-M-CASSETTE_L JC70-00300A ADJUST-M-CASSETTE_R JC70-00301A GEAR-PINION JG66-40003A RPR-PAD CASSETTE JC73-00141A CAM-KNOCK UP JC66-00719A INDICATOR-CST PAPER JC64-00143A Service Manual 8-24 Samsung Electronics...
  • Page 160 Exploded View & Parts List 8.11 SCF(Option Cassette Frame) Exploded view Service Manual 8-25 Samsung Electronics...
  • Page 161 PBASUB-SCF JC92-01614A CBF HARNESS -SCF GND JC39-00366A CBF HARNESS -SCF JC39-00357A COVER-M-SIMM R2 JC63-00492A SHEET-COVER SENSOR JC63-00369A PMO-ACTUATOR EMPTY JC72-00975A IPR-GND TOP JC70-11028A SOLENOID-HB(MANUAL) JC33-00010A PMO-LOCKER CST JC72-00983A FOOT-BACK JC61-00835A FOOT-FRONT JC61-00836A SCREW-ASS’Y TAPT 6006-001078 Service Manual 8-26 Samsung Electronics...
  • Page 162 JC66-00689A 39-6 GEAR 35 IDLE JC66-00690A 39-7 GEAR-RDCN 57/18 JC66-00389A 39-8 GEAR-IDLE 23 JC66-00396A 39-9 MOTOR STEP(SCF) JC31-00009A 39-10 SCREW-MACHINE 6001-000131 39-11 CORE-FERRITE 3301-001635 39-12 CABLE TIE 6501-000004 BUSH CABLE JC61-00804A SCREW-TAPTITE 6003-000196 MEC-CASSETTE JC97-02020A Service Manual 8-27 Samsung Electronics...
  • Page 163 Exploded View & Parts List MEMO Service Manual 8-28 Samsung Electronics...
  • Page 164 Appendix (Parts code) Update: 9/10/04 Buyer-Model Code ELA HOU-SCAN ELA HOU-OPE PBA SUB-LIU SCX-4720F/XAA JC96-03184A JC96-03174A JC92-01599A SCX-4520/XAA JC96-03181A JC96-03183A SCX-4720F/XEC JC96-03184B JC96-03174B JC92-01599B SCX-4520/XEC JC96-03181B JC96-03183B SCX-4720F/XEF JC96-03184C JC96-03174C JC92-01599B SCX-4520/XEF JC96-03181C JC96-03183C SCX-4720F/XEG JC96-03184D JC96-03174D JC92-01599B SCX-4520/XEG JC96-03181D...
  • Page 165 Appendix (Parts code) Update: 9/10/04 Buyer-Model Code ELA HOU-SCAN ELA HOU-OPE PBA SUB-LIU SCX-4720F/XAA JC96-03184A JC96-03174A JC92-01599A SCX-4520/XAA JC96-03181A JC96-03183A SCX-4720F/XEC JC96-03184B JC96-03174B JC92-01599B SCX-4520/XEC JC96-03181B JC96-03183B SCX-4720F/XEF JC96-03184C JC96-03174C JC92-01599B SCX-4520/XEF JC96-03181C JC96-03183C SCX-4720F/XEG JC96-03184D JC96-03174D JC92-01599B SCX-4520/XEG JC96-03181D...

  • Page 166: Block Diagram

    Block Diagram 9. Block Diagram Service Manual Samsung Electronics...

  • Page 167: Connection Diagram

    Connection Diagram 10. Connection Diagram Service Manual 10-1 Samsung Electronics...

  • Page 168: Schematic Diagram

    Schematic Diagram 11. Schematic Diagrams 11.1 Main Board(1/16) Service Manual 11-1 Samsung Electronics This Document can not be used without Samsung’s authorization.
  • Page 169 Main Board(2/16) Schematic Diagram Service Manual 11-2 Samsung Electronics This Document can not be used without Samsung’s authorization.
  • Page 170 Main Board(3/16) Schematic Diagram Service Manual 11-3 Samsung Electronics This Document can not be used without Samsung’s authorization.
  • Page 171 Main Board(4/16) Schematic Diagram Service Manual 11-4 Samsung Electronics This Document can not be used without Samsung’s authorization.
  • Page 172 Main Board(5/16) Schematic Diagram Service Manual 11-5 Samsung Electronics This Document can not be used without Samsung’s authorization.
  • Page 173 Main Board(6/16) Schematic Diagram Service Manual 11-6 Samsung Electronics This Document can not be used without Samsung’s authorization.
  • Page 174 Main Board(7/16) Schematic Diagram Service Manual 11-7 Samsung Electronics This Document can not be used without Samsung’s authorization.
  • Page 175 Main Board(8/16) Schematic Diagram Service Manual 11-8 Samsung Electronics This Document can not be used without Samsung’s authorization.
  • Page 176 Main Board(9/16) Schematic Diagram Service Manual 11-9 Samsung Electronics This Document can not be used without Samsung’s authorization.
  • Page 177 Main Board(10/16) Schematic Diagram Service Manual 11-10 Samsung Electronics This Document can not be used without Samsung’s authorization.
  • Page 178 Main Board(11/16) Schematic Diagram Service Manual 11-11 Samsung Electronics This Document can not be used without Samsung’s authorization.
  • Page 179 Main Board(12/16) Schematic Diagram Service Manual 11-12 Samsung Electronics This Document can not be used without Samsung’s authorization.
  • Page 180 Main Board(13/16) Schematic Diagram Service Manual 11-13 Samsung Electronics This Document can not be used without Samsung’s authorization.
  • Page 181 Main Board(14/16) Schematic Diagram Service Manual 11-14 Samsung Electronics This Document can not be used without Samsung’s authorization.
  • Page 182 Main Board(15/16) Schematic Diagram Service Manual 11-15 Samsung Electronics This Document can not be used without Samsung’s authorization.
  • Page 183 Main Board(16/16) Schematic Diagram Service Manual 11-16 Samsung Electronics This Document can not be used without Samsung’s authorization.

  • Page 184: Liu Board

    Schematic Diagram 11.2 LIU Board Service Manual 11-17 Samsung Electronics This Document can not be used without Samsung’s authorization.

  • Page 185: Ope Board

    Schematic Diagram 11.3 OPE Board Service Manual 11-18 Samsung Electronics This Document can not be used without Samsung’s authorization.
  • Page 186 Schematic Diagram 11.4 USB Host Board Service Manual 11-19 Samsung Electronics This Document can not be used without Samsung’s authorization.
  • Page 187 Schematic Diagram 11.5 SMPS_110V Service Manual 11-20 Samsung Electronics This Document can not be used without Samsung’s authorization.
  • Page 188 OP104 OP103 OP102 OPC1 CON2-23 2G-288 KPI -51 2 KPI -51 2 R120 CON2-24 7D56 1 5.6K CON2-24 EXI T D GND CON2-25 CON2-26 FUESR -ON Service Manual 11-21 Samsung Electronics This Document can not be used without Samsung’s authorization.
  • Page 189 ZD301 D1NL20U INDEX R309 2.7VB R304 R307 1/4W4.7 D304 C305 D305 150KF THV REA 1N4148 1N4148 CN2-15 THV_READ R308 ZD302 C307 IC105/A 2.7VB MY2A473J R310 200J Service Manual 11-22 Samsung Electronics This Document can not be used without Samsung’s authorization.
  • Page 190 ELECTRONICS This service manual is also provided on the web, © Samsung Electronics Co.,Ltd. July 2004 the ITSELF system Samsung Electronics Co., Ltd. Printed in Korea. http://itself.sec.samsung.co.kr VERSION NO. : 1.00 CODE : JC-0127A...

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