Samsung SCX-4321 Service Manual Download Page 156

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Schematic Diagram

Service Manual

10-15

This Document can not be used without Samsung’s authorization.

Samsung Electronics

Q401
KST2907A

18V

R412
1/2W2K

R404

30KF

C402

103

R407
240KF

R408
47K

R409

Q402
D526-Y

IT401
KAB-006

R410
1W3

24VS2

C405
2KV680

D401

6KV

MHV
50K

D403
1N4148

R405

220KF

D404

1N4148

D402
6KV

R403

100KF

R402
62KF

C408
104

R406
2.2KF

C403

333

C406

3KV471

R413
BR1/2W15MJ

R426

1/2W100K

R414
BR1/2W30MF

ZD401
1W100V

IT501
T1167

Q501
KST2907A

U104
7407

R503
100

C502

222

R506
56KF

R505
100KF

R509
12KF

R508

86.6KF

Q502
D526-Y

C503

104

R510
47K

R512
430

C504
333

R513
1W3

C505
2KV680

D502

6KV

C506
3KV471

R516

1/2W51K

R514
MGR1W15MF

ZD501
1W200V

DEV
50K

18V

24VS2

R124
1W1.2K

Q103
B1151-Y

24VS

R121
3.9K

24VS2

C113

25V47uF

U103
KA7818

R401

100

U104
7407

C404

3KV471

Q104

KST2222A

R411
1/2W2.2K

C401

222

R502

1/2w2.2K

R504

1/2w2K

C501

104

U102
KA324

R123
100

R122
1K

R518
MGR1W15MF

D501

1N4148

R519
1/2W51K

R511
47K

R507
18KF

MHV

24VS2

18V

BIAS-PWM

OPC

MHV-PWM

SUPPLY

DEV

SKYLARK-HVPS

CN1-#13

CN1-#11

(2012)

(SMD)

(2012)

SOP-14

(2012)

HVPS (1/3)

Summary of Contents for SCX-4321

Page 1: ...Device Memory 16MB Resolution 600 600dpi Option N A Printing Speed 22ppm LTR 20ppm A4 Print Memory 10MB Print Language SPL Path Type C Path Cassette Capa 150sheets Outlet Stacking Capa 50sheets Toner Cartridge initial 1K sales 3K ADF Capacity 30sheets Scan Method 600 dpi Color CIS Copy Speed SDMC 22Cpm Ltr MDMC 7Cpm Ltr Interface USB1 1 IEEE1284 SCX 4521F Series ...

Page 2: ...0139H This service manual is a property of Samsung Electronics Co Ltd Any unauthorized use of Manual can be punished under applicable international and or domestic law This service manual is also provided on the web the ITSELF system Samsung Electronics Co Ltd http itself sec samsung co kr ...

Page 3: ...ble 2 5 3 System Overview 3 1 System Outline 3 1 3 2 H W Structure and Descriptions 3 7 3 3 S W Structure and Descriptions 3 19 3 4 Initial Product Installation 3 24 4 Alignment and Adjustments 4 1 Sample Pattern 4 1 4 2 Control Panel 4 2 4 3 Consumables and Replacement Parts 4 4 4 4 LED Status Error Messages 4 4 4 5 Periodic Defective Image 4 5 4 6 How to use DCU 4 6 4 7 Paper Path 4 11 ...

Page 4: ...function 6 8 6 4 Bad software environment 6 13 6 5 Bad Image 6 17 7 Exploded Views Parts List 7 1 Exploded Views and Parts List 7 1 8 Block diagram 8 1 System Block Diagram 8 1 8 2 System Timing Chart 8 2 9 Connection Diagram 9 1 Connection Diagram 9 1 10 Schematic Diagram 10 1 Main Board 10 1 10 2 Connector Circuit Diagram 10 5 10 3 SMPS Circuit Diagram 10 6 10 4 HVPS Circuit Diagram 10 7 ...

Page 5: ...1 Reference Information 11 1 Troubleshooting Tools 11 1 11 2 Acronyms and Abbreviations 11 2 11 3 Selecting printer locations 11 4 11 4 Sample Tests Patterns 11 5 12 Circuit Description 12 1 Engine Controller 12 1 ...

Page 6: ...ny human access to laser radiation above a Class I level during normal operation user maintenance or prescribed service condition Warning Never operate or service the printer with the protective cover removed from Laser Scanner assembly The reflected beam although invisible can damage your eyes When using this product these basic safety pre cautions should always be followed to reduce risk of fire...

Page 7: ...g or removing the power connector The power connector must be inserted com pletely otherwise a poor contact could cause overheating possibly leading to a fire When removing the power connector grip it firmly and pull 7 Take care of the power cable Do not allow it to become twisted bent sharply round corners or otherwise damaged Do not place objects on top of the power cable If the power cable is d...

Page 8: ...lease carry out the following procedures before dismantling the printer or replacing any parts 1 Check the contents of the machine memory and make a note of any user settings These will be erased if the mainboard is replaced 2 Ensure that power is disconnected before servicing or replacing any electrical parts 3 Disconnect printer interface cables and power cables 4 Only use approved spare parts E...

Page 9: ...g entrance motor fan etc If do you can get harm 3 When you move the printer This printer weighs 10 4kg including toner cartridge and cassette Use safe lifting and handling techniques Back injury could be caused if you do not lift carefully 4 Ensure the printer is installed safely The printer weighs 10 4Kg ensure the printer is installed on a level surface capable of supporting its weight Failure t...

Page 10: ...ctrical charges sufficient to damage ESDs 5 Do not use Freon propelled chemicals When sprayed these can generate electrical charges sufficient to dam age ESDs 6 Do not remove a replacement ESD from its protective packaging until immediately before installing it Most replacement ESDs are packaged with all leads shorted together by conductive foam aluminum foil or a compa rable conductive material 7...

Page 11: ...ize Sales Points 22ppm A4 22ppm Letter fastest speed in its price class Favorite Copy ID Card Copy Toner Save Key Specification up to 22ppm A4 Up to 22ppm Letter 150 sheets Multi Purpose type paper input 50 sheets Paper Output 3 000pages toner capacity 600dpi Print Copy Resoulusion Samsung Print Language 16MB System memory 30 ADF 33 6 Kbps Fax Modem 100 Speed Dial 72 Hour Battery Back up 2 Product...

Page 12: ...cluding Red Hat 8 0 9 0 Fedora core 1 3 Mandrake 9 0 10 2 and SuSe 8 2 9 2 Mac 10 3 Power Requirement 110 127 VAC 50 60 Hz 4 5A 220 240 VAC 50 60 Hz 2 5A Power Consumption Sleep Mode Under 10 W Standby Mode 65W Average 350 W Print Mode Energy Star Compliant Yes Power Switch Yes Noise Warm up 49 dBA Stand by 35 dBA Coping 55 dBA Printing 53dBA Warm up time from Power On Status Less than 35 seconds ...

Page 13: ...ual 2 3 2 2 2 Print Specifications Items SCX 4321 SCX 4521F Compatibility Twainstandard WIAStandard Window2000 XP Twainstandard WIAStandard Window2000 XP Scan Method 600dpi Color CIS Contact Image Sensor 600dpi Color CIS Contact Image Sensor Module Module PC Scan Speed Lineart Halftone 10sec Platen 13sec ADF 10sec Platen 13sec ADF through Platen Gray 23sec Platen 26sec ADF 23sec Platen 26sec ADF C...

Page 14: ... Normal Dark Auto return to default mode Yes after 1 minute Time out option 15 30 60 180 sec Off Changeable Default mode Darkness Original Type Reduce Enlarge No of Copies ID Card Copy 2 up Yes ADF Only 4 up Yes ADF Only Collation Yes ADF Only Autofit Yes Platen Only LD Card Copy Yes Platen Only Clone Yes Platen Only Poster Yes Platen Only Items SCX 4321 SCX 4521F Handset No On hook Dial Yes Searc...

Page 15: ...approx 7sec ADF approx 8sec Platen S Fine approx 7sec ADF approx 8sec Platen Rx fax duplex print out No Multiple page scan speed 7 cpm Ltr Standard Resoution Res Memory Tx Receive Mode Fax TEL Ans Fax DRPD Memory Capacity 2MB When Power off Memory Back up Optional Memory No Max locations to store 99 locations to 1 Group Dial Fax Forward Yes On Off Broadcasting 109 locations Max locations Cover pag...

Page 16: ...abel Envelope Tick Thin Bond Color Paper Card Stock Preprinted Paper Weight 16 24lb 60 to 90g for 150 sheets Cassette Tray 16 43lb 60 to 165g for 1 sheet Manual Tray ADF Capacity Up to 30 sheets of 20lb 75g paper Up to 30 sheets of 20lb 75g paper ADF Document Size Up to Legal Up to Legal 2 2 7 Paper Handling Specifications 2 2 8 Software Items SCX 4321 SCX 4521F Compatibility DOS No No Win 3 x No ...

Page 17: ...er Manual SmarThru Print Driver Twain Driver RCP Toner Cartridge 1 EA Power Cable 1 EA Telephone Jack No 1 EA Printer Cable No No Tray Coner Yes Yes 2 2 10 Consumables Items SCX 4321 SCX 4521F Type Single Cartridge Single Cartridge How to install Front door open and front loading Front door open and front loading Toner Yield 3 000 pages at ISO 19752 Std Coverage Ships with 1 000 pages Starter Tone...

Page 18: ...is separated Module which focus on common and standard design of different kind products main control part adopting Fax LBP Printer exclusive Controller is chorus2 CPU ASIC and 1 Board Scanner part is composed of ADF and Platen and is connected with Main by Harness ADF ROLLER Scanner part Engine Part ADF UPPER PICK UP ROLLER EXIT ROLER WHITE BAR ADF GLASS FEED ROLLER SCAN UPPER SCAN UPPER SCAN UPP...

Page 19: ...eets at 16 30 C 3 1 3 Driver Ass y Gear driven power unit The motor supplies power to the paper feed unit the fuser unit and the toner cartridge 3 1 4 Fixing Part Fuser The fuser consists of the Heat Lamp Heat Roller Pressure Roller Thermistor and Thermostat It fixes toner to the paper using pressure and heat to complete the printing job 3 1 4 1 Temperature Intercepting Device Thermostat The therm...

Page 20: ...t 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 Safety device Fuser power is cut off when the front cover is opened LSU power is cut off when the front cover is opened The temperature of the fuser cover s surface is maintained at less than 80 C to protect ...

Page 21: ...ER M SIDE R EXTEND SMALL EXTEND LARGE TRAY CASSETTE COVER M_DEVE FIXING BKT SPEKER COVER M SIDE L COVER M_REAR COVER M_JAM COVER M_MIDDLE SCAN UPPER MOTOR ASS Y SCAN LOWER TIMING BELT CIS SLIDER CIS ADF GLASS SCAN GLASS KEY OPE COVER Case part figure Scan part figure ...

Page 22: ...t Main control part of SCX 4521F is made of ASIC CPU Image processor PC I F part include Scan interface part FAX Modem part and Printing process I F part CPU handles the BUS control I O interface scan interface PC interface and other miscellaneous driver circuit 1 Main Board Main Board has a function of sending Current Image Video Data to LSU of the machine controlling motor Driving Circuit and mo...

Page 23: ...s a level of about 1 2V and is goes to ADC of Chorus2 After ADC CIS analog signal will be converted to 8 bit Digital signal 2 Image Processing On the surface of the original paper the light from the CIS LED reflected and goes to the CIS Sensor Then the light is converted to the appropriate voltage suitable for ADC input Analog signal from CIS sensor is used for ADC input then is converted to 8 bit...

Page 24: ...U T V 21 T 30 Image Transmission Time 3sec ITU T NO 1 CHART Memory Tx ECM Data Compress MH MR MMR JPEG Modem Speed 33600 28800 14400 12000 9600 7200 4800 2400 bps Receive Level 0 48dBm Output Level Adjustable 6 15dBm 1dBm Step Initial Setting 12dBm Receive dynamic range 0 dBmto 43 dBmfor V 17 V 29 V 27 ter and V 21 9 dBm to 43 dBm for V 34 halfduplex 2 The Gain of the Line signal can be adjusted b...

Page 25: ...ine Paper Feeding 1 Feeding Type MP Cassette Type 2 Feeding Standard Center Loading 3 Feeding Qty Cassette 150 sheets 75g 20lb paper standard 4 1 sheet Paper OHP Envelope etc 5 Separating Type Cassette Friction Pad Type 6 Manual Tray 1 sheet 7 Driver Type Driving by Gearing from Main Motor 8 Pick_up Roller Driver Solenoid 9 Pick up Roller Rubber Material EPDM IR 1 3 or more 10 Pick up Velocity 94 ...

Page 26: ...3 1 Fuser Specification 1 Heat Lamp Heat Lamp Terminal Shape Terminal Single Type Voltage 120 V 115 5 220 V 230 5 Capacity 600 Watt 30 W Light Qty Distribution 140 Life 3000 Hr 2 Thermostat Thermostat Type Non Contact type THERMOSTAT Control Temperature 150 C 5 C 3 Thermistor Thermistor Type HF R0060 SEMITEC 364FL Type Temperature Resistance 7 k 180 C SYSTEM Temperature SETTING Stand by 165 5 C Pr...

Page 27: ...itch 1 0mm 2 Scan Resolution a Transmission Normal Vertial 3 85 Line mm Horizontal 8 Pels mm 203 x 98dpi Fine Vertial 7 7 Line mm Horizontal 8 Pels mm 203 x 196dpi Super Fine Vertial 11 8 Line mm Horizontal 11 8 Pels mm 300 x 300dpi b When Copy Vertial 11 8 Line mm Horizontal 23 6 Pels mm 600x300dpi ADF Vertial 23 6 Line mm Horizontal 23 6 Pels mm 600x600dpi Platen 3 Half Tone Gray Scale 256 Level...

Page 28: ...mA max voltage 3 3V d Output Logic H No Paper Logic L Paper e Lever Sensor DOC ADF Lower Torsion Spring 9 Regi Detect sensor a Type Photo interrupt b Position ADF PBA c LED max current 50mA max voltage 3 3V d Output Logic H No Paper Logic L Paper e Lever Sensor DOC ADF Lower Torsion Spring 10 Document Scan sensor a Type Photo interrupt b Position ADF PBA c LED Max current 50mA Max Voltage 3 3V d O...

Page 29: ...Execute Next menu or Next option item Previous menu or Previous option item 2 Save Toner Save TONER SAVE MODE select 3 Copy Reduce Enlarge Select ZOOM ratio when copy No of Copies Select the number of copies Original Type Change Copy Modes Text Text Photo Photo Darkness Change the Darkness of the Copied image Light Normal Dark Favorite Copy Select one of the predefined Copy templates 4 Fax Resolut...

Page 30: ...ted Frequency 50 60 Hz Frequency fluctuating range 47 63 Hz Input Current Under 4 0Arms 2 5Arms But the status when lamp is off or rated voltage is inputted outputted 2 Rated Output Power 3 Consumption Power NO Items CH1 CH2 Remarks 1 CHANNEL 5V 24 0V 2 CONNECTOR PIN CON 2 CON 2 Jam cover switch 5V PIN 5pin 24V PIN 2 3 4 included GND PIN 6pin GND PIN 7pin 3 Rated Output 5V 5 4 75 5 25V 24V 10 15 2...

Page 31: ...ng best quality printing image The HVPS part takes the 24V and outputs the high voltage such as THV MHV Supply Dev and the outputted high voltage is supplied to the toner OPC cartridge and transfer roller a Transfer High Voltage THV Input Voltage 24 V DC 15 10 21 6V 27 6V Out Voltage 1300KV 1 5 200 Load Out Voltage Trigger 6 5 Input Voltage Variation 5 Load Variation 5 Out Voltage Rising Time 100 ...

Page 32: ...e Fuser HEAT LAMP gets heat from AC power The AC power controls the switch with the Triac a semiconductor switch The ON OFF control is operated when the gate of the Triac is turned on off by Phototriac insulting part In other words the AC control part is passive circuit so it turns the heater on off with taking signal from engine control part When the HEATERON signal is turned on at engine the LED...

Page 33: ...A4 Legal Executive Folio By Country A5 B5 A6 Letter Machine ID Fax Only SCX 4521F ID Date Time 00 00 0000 only SCX 4521F 00 00 AM Clock Mode 12 24 hours 12hours only SCX 4521F Language English FRANCAIS Espanol English Portugues Deutsch Italiano Pycckn Norsk Polski Suomi Magyar Dansk cestina Svenska Turkse 15 language Power Save On 5 10 15 30 45 min 5 Off Ignore Toner On Off USB Mode Fast Slow Fast...

Page 34: ... A4 141 25 50 150 200 400 Custom 25 400 No of Copies 1 99 1 Timeout 15 30 60 180Sec Off 60sec Favorite copy Clone Copy Collate Autofit 2 side in 1 Pg 2 UP 4 UP Poster Off Clone Copy Collate Autofit ID Card Copy 2 UP This will set to 2UP 4 UP This will set to 4UP Poster 3 Copy Setup Default Change 4 Copy Feature Off 1 2 3 1 2 3 4 5 6 7 8 1st level 2nd level 3rd level Default Value RETURN RETURN lef...

Page 35: ...l Copy Off Off Junk Fax Setup On Fax Off Off Secure Receive On Off Print Off Prefix Dial FAX xxxxx 5 digits Stamp RCV Name On Off Off ECM Mode On Off On Phone Book only SCX 4521F Sent Report only SCX 4521F RCV Report only SCX 4521F System Data Scheduled Jobs only SCX 4521F MSG Confirm only SCX 4521F Junk Fax List only SCX 4521F 10 ea Speaker On Off Comm Comm Ringer Off Low Med High Med Key Sound O...

Page 36: ...ry Clear All Mem Paper setting Machine Setup Copy Setup Fax Setup Fax Feature Advanced Fax Sound Volume Sent Report RCV Report Phone Book Remote Test On Off only SCX 4521F Off 10 Maintenance Clean Drum 1 2 3 4 1st level 2nd level 3rd level Default Value RETURN RETURN left right Enter 14 character left right Enter continue ...

Page 37: ...ests to help with failure diagnosis When in Tech mode the machine still performs all normal operations To enter the Tech mode SCX 4521F To enter the Tech mode press in sequence and the LCD briefly displays TECH the machine has entered service tech mode To enter the Tech mode SCX 4321 To enter the Tech mode press in sequence and the LCD briefly displays TECH the machine has entered service tech mod...

Page 38: ...o Serial No Clear All Mem Clear Count Total Page Count Enter Password CRU Print CNT FLT Scan Count ADF Scan Count Used Toner CNT Edit Toner Dot Flash Upgrade Local Remote Silence Time Off 12 Sec Unlimited Off only SCX 4521F Machine Test Switch Test Modem Test only SCX 4521F Dram Test Rom Test Pattern Test Shading Test Report Protocol only SCX 4521F System Data Key History Error Info New Cartridge ...

Page 39: ...nu until Machine Setup appears on the top line of the display The first available menu item Machine ID displays on the bottom line 2 Press Enter The display asks you to enter the fax number If there is a number already set the number appears 3 Enter your fax number using the number keypad 4 Press Enter when the number on the display is correct The display asks you to enter an ID 5 Enter your name ...

Page 40: ...ss Enter and then the scroll button or When the cursor is not under the AM or PM indicator pressing the or button immediately moves the cursor to the indicator For the SCX 4321 press the scroll button or to move the cursor to the indicator You can change the clock mode to 24 hour format e g 01 00 PM as 13 00 5 Press Enter when the time and date on the display is correct When you enter a wrong numb...

Page 41: ...telephone line through the speaker such as the dial tone or a fax tone With this option set to Comm the speaker is on until the remote machine answers Ringer You can adjust the ringer volume Key Sound With this option set to On a key tone sounds each time a key is pressed Alarm Sound You can turn the alarm sound on or off With this option set to On an alarm tone sounds when an error occurs or fax ...

Page 42: ...light is off the mode is deactivated and the machine prints with the normal quantity of toner 4 2 3 10 Power Save Mode Power Save mode allows your machine to reduce power consumption when it is not in actual use You can turn this mode on and select a length of time for which the machine waits after a job is printed before it switches to a reduced power state 1 Press Menu until Machine Setup appear...

Page 43: ...for upgrade Ensure you save ALL of these files in the same folder 2 At the DOS prompt enter the correct command as shown below and push the enter key Then the upgrade will automatically take place 3 There are two commands use the correct one depending on the condition of the set When the product is in the idle condition down rom file When the product is in Ready condition TECH MODE DATA SETUP FLAS...

Page 44: ...e version appear in the LCD display FLASH VER 1 00 V ENGINE VER 1 00V PATTERN TEST Using this pattern printout you can check that the printer mechanism is functioning properly This function is for factory manufacturing use only SHADING TEST The function is used to set the optimum scan quality determined by the specific characteristics of the CIS Contact Image Sensor If copy image quality is poor p...

Page 45: ...TT 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 KEY HISTORY This list shows th input key history ERROR INFO This list display the detail machine error list ...

Page 46: ...Alignment and Adjustments Samsung Electronics Service Manual 4 14 4 3 Control Panel 4 3 1 Control Panel Functions SCX 4521F SCX 4521F ...

Page 47: ...Samsung Electronics Service Manual Alignment and Adjustments 4 15 ...

Page 48: ...Alignment and Adjustments Samsung Electronics Service Manual 4 16 4 3 2 Control Panel Functions SCX 4321 SCX 4321 ...

Page 49: ...ne has problem in communication It displayed on the LCD Machine displays this in case of Transmission Machine displays this in case of fax handshaking step of Reception Line Error Line Error When the machine has problem in case of Fax Data reception step NO ANSWER No Answer When the machine could not connect to remote fax after Completion of redial up to redial counter in system data INCOMPATIBLE ...

Page 50: ... When the machine has encountered the memory full during storing 1 Yes 2 No the document into memory the machine display the CANCEL to operator whether he she make a decision the canceling the job or accept the scanned page so far to transmit the remained documents Job has not been created Operation Not When operator is doing in ADD CANCEL operation and Assigned There is no job to handle if operat...

Page 51: ...xt test selected 3 Fan Test 1 On 2 Off next test selected 4 Manual Clt Test 1 On 2 Off next test selected 5 PTL Test 1 On 2 Off next test selected 1 1 LSU Motor Test 1 On 2 Off next test selected 2 LSU Hsync Test 1 On 2 Off next test selected 3 LD Test 1 On 2 Off next test selected 2 1 Feed Sensor Test 1 Check read the sensor 2 Next Next Sensor test 2 Exit Sensor Test 1 Check read the sensor 2 Nex...

Page 52: ...tarts and Laser Ready is displayed if Laser Leady On Off the motor spins at the correct speed otherwise Laser Error is displayed 13 LD Test Diode On is displayed when the laser diode is on Diode On Off Otherwise Diode Off is displayed 21 Feed Sen Test These functions allow the current state of the sensor to be Sensor Off or Sensor On 22 Exit Sen Test displayed 23 Cover Sen Test This function allow...

Page 53: ...Samsung Electronics Service Manual Alignment and Adjustments 4 21 4 6 Paper Path and Clearing Paper Jams 4 6 1 Copy Scan Document Path ...

Page 54: ...Jam 0 occurs if the sensor is not operated within a certain time 3 Having passed the paper feed sensor the paper moves to the paper exit sensor via printing process Jam 1 occurs if the sensor is not operated within a certain time 4 The paper then passes through the paper exit sensor and out of the set Jam 2 occurs if the trailing edge of the paper does not pass the exit sensor within a certain tim...

Page 55: ...en a paper jam occurs Paper Jam appears on the display Refer to the table below to locate and clear the paper jam To avoid tearing the paper pull out the jammed paper gently and slowly Follow the instructions in the following sections to clear the jam Message Location of Jam Paper Jam 0 In the tray Open Close Door Paper Jam 1 In the fuser area or around the toner Open Close Door cartridge Paper Ja...

Page 56: ...rtridge out lightly pushing it down 2 Remove the jammed paper by gently pulling it straight out 3 Replace the toner cartridge and close the front door Printing automatically resumes 4 6 3 2 In the Fuser Area or Around the Toner Cartridge NOTE The fuser area is hot Take care when removing paper from the machine ...

Page 57: ...the output tray 3 If there is any resistance and the paper does not move when you pull or if you cannot see the paper in the output tray open the rear door by pulling the tab on it 4 Remove the jammed paper by gently pulling it straight out 5 Close the rear door 6 Open and close the front door to resume printing 4 6 3 3 In the Paper Exit Area NOTE Inside of the machine is hot Take care when removi...

Page 58: ...equently when you print on A5 sized paper 4 6 3 5 Tips for Avoiding Paper Jams By selecting the correct paper types most paper jams can be avoided When a paper jam occurs Follow the procedures in Loading Paper Ensure that the adjustable guides are positioned correctly Do not overload the tray Do not remove paper from the tray while your machine is printing Flex fan and straighten the paper before ...

Page 59: ...achine note the cable routing that will be affected Whenever servicing the machine you must perform as follows 1 Check to verify that documents are not stored in memory 2 Be sure to remove the toner cartridge before you disassemble parts 3 Unplug the power cord 4 Use a flat and clean surface 5 Replace only with authorized components 6 Do not force plastic material components 7 Make sure all compon...

Page 60: ...lectronics Service Manual Disassembly and Reassembly 5 2 5 2 MP Tray 1 Open the Front Cover 2 Release the Toner Cartridge 3 Hold the MP Tray and pull it to the arrow direction Front Cover Toner Cartridge MP Tray ...

Page 61: ...to the 5 2 2 To exchange Pick Up Sponge pull part Pick Up Housing U while pressing the hook on the both side the Pick Up Housing B Housing B 2 1 Housing U Sponge 5 4 Front Cover 1 Open the Front Cover 2 To remove the Front Cover first pull the part below the right side of the Front Cover with a light pressure to the direction of arrow left Front Cover 2 1 ...

Page 62: ...ual Disassembly and Reassembly 5 4 5 5 Cassette Tray 1 Open the Cassette Tray 2 As shown below to remove the Cassette Tray lift the nob to the direction of the arrow with a light pressure while holding the Set left Cassette Tray 2 1 ...

Page 63: ...r screws securing the Rear Cover and remove it 2 Open the Jam Cover 3 To remove the Rear cover make sure the right Power Switch doesn t get jammed to the Rear Cover as shown below 4 If necessary remove the Jam Cover in the direction of arrow as shown below Jam Cover Rear Cover Jam Cover Rear Cover ...

Page 64: ...re you remove the Right Cover you should remove Front Cover Refer to the 5 4 Rear Cover Refer to the 5 6 2 Remove the one screws securing the Right Cover 3 Apply light pressure to the back of the Right Cover and pull it to the right side in the direction of arrow as shown below Right Cover ...

Page 65: ... Cover Refer to the 5 6 2 Remove the one screws securing the Left Cover 3 Apply light pressure to the back of the Left Cover and pull it to the leftt side in the direction of arrow as shown below 4 Unplug the Speaker Connector from the Main PBA 5 If necessary remove the two screws securing the Speaker and remove it Left Cover Speaker Left Cover Speaker Fixing Bracket ...

Page 66: ...ight Cover Refer to the 5 7 Left Cover Refer to the 5 8 2 Remove the two screws from the Middle Cover and remove the screw securing the Ground Cable 3 Unplug the three Connectors ADF Scan Motor OPE and Flat Cable CIS as shown below 4 Release the Scan Ass y in the direction of arrow as shown below Middle Cover Middle Cover OPE ADF Scan Motor Flat Cable Scan Ass y ...

Page 67: ... and ADF Housing 3 Remove the ADF Housing from the Platen Housing At that time carefully release the ADF Motor Harness from the Platen Housing as shown below 4 Remove the two screws securing the ADF Ass y and remove it At that time carefully release the ADF Motor Harness from the Platen Cover as shown below 5 If necessary remove the two screws securing the TX Stacker Ass y and remove it as shown b...

Page 68: ...s shown below Then lift the Pick Up Unit 8 Remove the two screws securing the ADF Upper and insurt a flat blade screwdriver in to slot as shown below and remove the ADF Upper 9 Unplug the Connector from the ADF PBA and remove the four screws securing the ADF Motor Housing and remove it in the direction of arrow as shown below Open Cover 2 1 2 Bush 1 2 Pick Up Unit Bearing ADF Upper ADF Lower ADF M...

Page 69: ...ack as shown below and remove the OPE Unit from the Platen Housing 2 Unplug the three Connectors Battery OPE Full Sensor as shown below 3 Remove the five screws securing the OPE PBA and remove it 4 Release the Contact Rubbers as shown below 5 Release the Keys as shown below OPE ADF Housing 2 1 OPE Battery Full Sensor OPE PBA OPE PBA Rubber Scroll Rubber Tel Tel Scroll Start Stop Resolution Copy FA...

Page 70: ...er to the 5 10 OPE Unit Refer to the 5 11 2 Remove the five screws from the Scan Upper and remove it from the Scan Lower as shown below 3 Take out the Battery 4 Push the Holder in the direction of arrow and remove the Belt as shown below The CIS will come out at the same time 5 Release the Belt and Flat Cable from the CIS Scan Upper Scan Lower Battery CIS 1 2 3 Belt Belt Flat Cable CIS ...

Page 71: ...Remove the two screws securing the Scan Motor Ass y and remove it 7 If necessary remove the two screws securing the Scan Motor and remove it 8 Using a flat blade screwdriver remove the Full Sensor as shown below Scan Motor Ass y Scan Motor Scan Motor Bracket Full Sensor ...

Page 72: ... 1 Before you remove the Middle Cover you should remove Scan Ass y Refer to the 5 9 2 Remove the five screws securing the Middle Cover as shown below 3 Carefully release the Middle Cover from the Main PBA as shown below 4 If necessary take out the Stacker Main PBA Middle Cover Stacker ...

Page 73: ... the HVPS you should remove Scan Ass y Refer to the 5 9 Middle Cover Refer to the 5 13 2 Remove the three screws securing the Sheet and remove it 3 Remove the three screws securing the HVPS and remove it with the HVPS Ground as shown below 4 Unplug the Connector from the HVPS HVPS HVPS HVPS Ground ...

Page 74: ...fore you remove the Main PBA you should remove Scan Ass y Refer to the 5 9 Middle Cover Refer to the 5 13 2 Unplug the all Connectors from the Main PBA as shown below 3 Remove the six screws securing the Main PBA and remove it SMPS HVPS Main Motor LSU Clutch LIU DEVE Thermister Main PBA ...

Page 75: ...wo screws securing the Engine Shield and remove the six screws securing the Frame then remove the RX Drive in the direction of arrow as shown below 4 Remove the Connector as shown below 5 Release the four Gears RDCN OPC Fuser Feed from the Frame as shown below 6 Remove the four screws securing the Motor Bracket and remove it Then remove the two screws securing the Motor and remove it Port Bracket ...

Page 76: ...e 5 9 Middle Cover Refer to the 5 13 2 Unplug the two Connectors from the SMPS and Main PBA as shown below 3 Remove the four screws securing the Fuser and remove it as shown below 4 Remove the Lever M Act Exit in the direction of arrow as shown below 5 Remove the Cover M Safty as shown below Thermister Fuser Fuser Lever M Act Exit 1 2 Cover M Safty ...

Page 77: ...he same time NOTICE If you don t follow the direction above the Spring will come out forcing the Roller_Main Roller_FR F Down Holder inside the Frame Ass y 8 Remove the two screws securing the Thermo Cap and remove it 9 Take out the Thermostat then release the CBF Harness as shown below 10 Remove the screw securing the Harness and remove it Then take out the Thermistor as shown below Cover M Guide...

Page 78: ...ws securing the Halogen Lamp as shown below 12 Remove the two screws securing the Cover M and remove it 13 Take out the Halogen Lamp in the direction of arrow as shown below Samsung Electronics Service Manual Disassembly and Reassembly 5 20 Cover M Halogen Lamp Heat Roller ...

Page 79: ...ne Shield from the Actuator Feed Sensor Lever 4 When if only remove the SMPS first remove the Rear Cover refer to the 5 6 and unplug the Fuser Connector and remove the six screws securing the SMPS Then unplug the Connector from the Main PBA and carefully release the SMPS as shown below 5 When if only remove the LIU PBA first remove the Rear Cover refer to the 5 6 and remove the two screws securing...

Page 80: ...mbly and Reassembly 5 22 5 19 LSU 1 Before you remove the LSU you should remove Scan Ass y Refer to the 5 9 Middle Cover Refer to the 5 13 2 Remove the three screws securing the LSU and remove it Then unplug the two Connectors from the LSU LSU ...

Page 81: ... Cover Refer to the 5 13 Fuser Refer to the 5 17 Engine Shield Refer to the 5 18 2 Remove the four screws securing the Paper Path Frame and remove it in the direction of arrow as shown below 3 Remove the Transfer Roller from the Frame as shown below 4 Remove the screw securing the Solenoid MP and remove it as shown below Solenoid MP Paper Path Frame Transfer Roller 2 1 Bush L Bush ...

Page 82: ...repair the printer first obtain a detailed description of the problem from the customer Power On Indicate Error Massage Ready or Power save Test Print printing Quality is Nomal Refer to Solution of Image Problem Refer to Error Massage Chapter 4 4 END No Power Power Module error Main PBA error LCD Panel error OP Panel ON ...

Page 83: ...cable harness Is the message on the LCD Panel a standard error message Refer to section 4 3 3 Check the Paper Path Is there a Paper Jam Remove any paper fragments caught in the paper path Paper Jam occurs repeatedly at a specific point in the Paper Path Open the fuser cover Jam clear Dismantle the machine and carefully inspect the region where the jam occurs Especially check if paper fragments are...

Page 84: ...thin specification If necessary move the printer 3 Ensure that the printer is position away from any air conditioning or other heating or cooling equipment Also ensure that is not positioned in a direct draft from any air conditioning fan or open window If necessary move the printer 4 Ensure the printer is not positioned in direct sunlight If it is unavoidable use a curtain to shade the printer 5 ...

Page 85: ... due to bad sealing of the side pad 3 Check the surface of the roller pickup for foreign mat ter 4 If the paper feeds into the printer rand Jam 0 occurs perform Engine Test Mode Feed Sensor Test 1 Replace the solenoid 2 Replace the side pad Assembly L or R if necessary 3 Clean with soft cloth dampened with IPA Isopropyl Alcohol or water 4 Replace the SMPS HVPS or Sensor 6 2 2 JAM 0 Description 1 P...

Page 86: ... This occurs when a Guide claw is broken away or transformed It occurs when the Spring of a Guide claw is broken away or transformed It occurs when the Heat Roller or Pressure Roller is seriously contaminated with the toner 3 Paper is accordion in the fuser 1 Check if the exit sensor actuator is defective Check if the actuator exit is unformed Check if the lever part is unformed in shape Check whe...

Page 87: ...e the smooth paper 6 2 6 Paper rolled in the Fuser Description If contaminated at intervals of 57mm on the back of a paper Check and Cause Solution 1 Contamination of the pressure roller or heat roller Background Hot off set 2 Check the claw of the fuser whether it is unfit ted 1 After disassembling the fuser clean contami nation between the heat roller and the ther mostor and remove the contamina...

Page 88: ...Cartridge OPC Drum Description Paper is rolled up in the OPC Check and Cause Solution 1 Paper is too much thin 2 The face of paper is curled 1 Recommend to use normal paper 2 How to remove the rolled in the OPC Drum Remove the paper while turning the OPC Drum against the ongoing direction ...

Page 89: ...gain after clearing the memory 2 If re connecting the harness does not correct the fault replace the OPE Ass y and the main Board in sequence 6 3 2 Defective OPE Keypad Description Pressing keys does not cause the set to respond correctly Check and Cause Solution 1 Clear the memory 2 Check that there is an audible key click when a key is pressed 1 Check that the keypad is assembled correctly and t...

Page 90: ...is displayed in the LCD panel even when paper is loaded in the cassette Check and Cause Solution 1 Deformed paper sensor actuator or faulty sensor 2 SMPS PBA or Main PBA is defective 3 Faulty cables or connectors 1 Replace the defective actuator or sensor 2 Replace the SMPS PBA or MAIN PBA as appropriate 6 3 5 Paper Empty without indication Description The paper empty message does not appear in th...

Page 91: ...ch operation Check and replace switch if necessary 2 Replace the Main Control board or HVPS S W as necessary 6 3 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 2 The tab on the front cover may be damaged or broken 3 Check the connector and cables between HVPS and mai...

Page 92: ...on 1 The main motor harness or Motor PCB may be faulty 1 Check the motor harnesses and connectors replace if defective If the problem persists replace the main PBA Note Check motor operation using Engine Test Mode 6 3 9 No Power Description When system power is turned on the LCD panel does not come on Check and Cause Solution 1 Check if the power input and SMPS output are normal 2 LCD panel does n...

Page 93: ... of software 2 Replace the printer cable If the problems not solved even after the cable replaced check the amount of the remaining toner 3 Check if the connection between PC and printer port is proper If you use windows check if the printer dri ver in the controller is set up If the printer driver is properly set up check in which program the printing is not working The best way to find out is to...

Page 94: ...m rather than the RAM problem In this case provide more space for the hard disk Secure more space using the disk utilities program 2 The connection of the cable and printer port is not proper Check if the connection is properly done and if the parallel port in CMOS is rightly set up 3 As a printer port Select ECP or SPP among SPP Normal ECP and EPP modes increase print ing speed SPP normal mode su...

Page 95: ...allel port in the CMOS SETUP 2 Printer Driver Error 3 Error message from insufficient memory The printing job sometimes stops or due to insufficient virtual memory but it actually comes from the insuffi cient space of the hard disk 1 Select SPP Normal or ECP LPT Port the among ECP EPP or SPP in the CMOS Setup 2 Check the printer in My Computer to see if the printer driver is compatible to the pres...

Page 96: ...ete the unnecessary files to provide more space to start printing job 2 If there are some files with the extension name of jnl Delete them and Reboot the Windows to restart printing job 3 Shut down all other programs except the current one if possible 4 Delete the printer driver completely and reinstall it 5 After rebooting the computer check for viruses restore the damaged files and reinstall the...

Page 97: ...igital Printer Digital Printer Digital Printer Check and Cause Solution 1 Foreign matter stuck onto the window of internal lenses of LSU mirror 2 Foreign matter or toner particles between the developer roller and blade In case the life of the developer has been expired white lines or light image occur in front of the image 3 It may occur when Burr and foreign sub stances are on the window of the d...

Page 98: ...y in the printing Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer Check and Cause Solution 1 If dark or blurry black spots occur periodi cally the rollers in the Developer may be contaminated with foreign matte or paper particles Charge roller 37 7 mm interval OPC drum 75 5 mm interval 2 If faded areas or voids occur in a black image at intervals of 75 5 mm or black...

Page 99: ...oper cartridge and try to print out 3 Wait 30 minutes after printer is powered on before you start printing 4 Clean up the contaminated area by the toner 5 Replace the HVPS if the problems are not solved by the above four directions 6 5 6 Dark Image or a Black Description The printed image is dark Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer Check and Cause Solut...

Page 100: ... and try to print out 6 5 8 Background Description Light dark background appears in whole area of the printing Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer Check and Cause Solution 1 Does character exist less than 2 per a page and hasn t it been used long time 2 Does recycle paper be used 3 Has the life span of the developer ended 4 Is the movement Up and Down of...

Page 101: ... the terminals when contaminated by toner particles 2 Occur in the developer cartridge replace the developer and try to print out 3 Replace the Main board and HVPS Board if not solved by the above directions 1 2 4 If not solved by the direction 3 check the transfer roller lifetime and replace it 5 Wait about 1 hour after power on before using printer 6 5 10 Ghost 2 Description Ghost occurs at 75 5...

Page 102: ...inter Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer 47 5 or 63 9mm Check and Cause Solution The temperature of the fuser is maintained high 1 Disassemble the fuser and remove the contaminated toner particles on the roller and clean the foreign matter between Thermistor and Heat roller Caution can be deformed 6 5 13 Stains on the Face of Page Description The backgr...

Page 103: ...o be deformed 6 5 15 Blank Page Print out 1 Description Blank page is printed Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer Check and Cause Solution Bad ground contacts in OPC and or devel oper Remove contamination of the terminals of the developer and the unit 6 5 16 Blank Page Print out 2 Description 1 Blank page is printed 2 One or several blank pages are print...

Page 104: ... LIU and the Main PBA replace as necessary 4 Use Tech mode Modem Test to check that the speaker and amplifier are working Replace the Main B d 6 6 2 Defective MF DIAL Description The MF DIAL is not functioning Check and Cause Solution 1 Check that the telephone line cord supplied with the set is connected to TEL LINE correctly 2 Listen for a CLICK sound when the KEY is pressed 3 Check the connecti...

Page 105: ...ODEM shows a fault replace the Main B d 6 6 4 Defective FAX FORWARD Description RECEIVE is functioning but FORWARD is not functioning or received data is corrupt Check and Cause Solution 1 Check if there is a NOISE line by pressing on hook dial and listening 2 Check that the destination fax machine can receive forwarded faxes by using a different sending fax machine preferably from the same wall s...

Page 106: ...se Solution 1 Check if there is a NOISE line by pressing on hook dial and listening 2 Ask sender to send to another fax machine if possible connected to the same wall socket 1 If you can hear a noisy line when using on hook dial replace or repair the telephone line 2 Replace LIU or main PBA in sequence Check and Cause Solution Check that the RECEIVE Mode is set to FAX MODE If the fault persists ev...

Page 107: ...working Check and Cause Solution Check the FAX status of the forwarding side This is a problem with the sending fax machine Correct the setting on the remote machine Check and Cause Solution 1 Check that the RECEIVE Mode is set to FAX MODE 1 If the RECEIVE Mode is set to the TEL MODE reset it to the FAX MODE 2 Even after the RECEIVE Mode is changed to the FAX Mode the problem persists then try to ...

Page 108: ... Cause Solution 1 Check for CIS problem on the Main PBA 2 Check shading profile 1 Check the CIS FFC Cable is properly connected 2 Redo shading profile in the tech mode Check and Cause Solution 1 Check the Scanner Cover is properly closed 2 Check shading profile 3 Check white black reference voltage on Main PBA 1 Room light can pass through a thin original 2 Redo shading profile in the tech mode 3 ...

Page 109: ...dark Check and Cause Solution 1 Check shading profile 2 Check the gap between original and scanner glass 3 Check printing quality 1 Redo shading profile in the tech mode 2 A gap of more than 0 5 mm can cause a blurred image Ensure rollers and cover close correctly Replace as necessary 3 See Print troubleshooting 1 Check for correct assembly of gears and motor Ensure no parts are fouling and there ...

Page 110: ...that the par allel port is properly configured in the BIOS 2 If printing is OK check that the Scan driver is also installed Refer to User s Manual 3 If the copy function works replace the Main PBA If the copy function doesn t work replace the CIS Ass y and try again 6 8 2 Poor Quality of PC Scanned images Description The image PC scanned is not clear or bad Check and Cause Solution 1 Use TECH mode...

Page 111: ...int quality by redistributing the toner Shake the toner cartridge however you should replace the toner cartridge to solve the problem permanently 6 9 2 1 Redistributing Toner When the toner cartridge is near the end of its life white streaks or light print occurs The LCD displays the warning mes sage Toner Low You can temporarily reestablish the print quality by redistributing the remaining toner ...

Page 112: ...when the OPC drum is nearing the end of its life 14 000pages This means that the life of the mechanical parts in the cartridge has expired this is not an indication of toner remaining Solution After printing about 15 000 pages in a worst case scenario the waste toner collector might overflow and it may cause the system to fail Also after 15 000 pages the OPC drum surface will be becoming worn and ...

Page 113: ...en PC and printer port are correcct If you use windows check that the printer driver in the controller is set up correctly set up the correct port is selected and Use On line is selected in the driver If the printer driver is properly set up try printing a test page from the driver proper ties Check in which program printing is not working Try opening Note Pad and printing If the printer is not wo...

Page 114: ...ans there is a hard disk space problem rather than a printer RAM problem In this case pro vide more space on the hard disk Secure more space using the disk utilities program 2 The connection of the cable and printer port is not correct Check that the cable is properly connected and if you are using the parallel port check that the port settings in CMOS is correct 3 For the printer port Select ECP ...

Page 115: ...virtual memory this is caused by insufficient space on the hard disk 1 Ensure that ECP best or SPP is selected in the CMOS BIOS setup 2 Ensure that the correct driver is loaded Use the driver supplied 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 ALL OTHER GDI or S...

Page 116: ... previous failed print jobs on the hard disk with the name in the form jnl Delete these files and Reboot Windows to restart the printer 3 Shut down all other programs except the current one if possible 4 Delete the printer driver completely and reinstall it 5 After rebooting the computer check for viruses restore the damaged files and reinstall the application program which is not working properly...

Page 117: ...ware ensure that computer and printer can communicate using a Ping command SycThru is unable to automatically detect the printer 1 Check that the LAN cable is connected to the printers If an IP address is assigned to the computer and printer ensure that the Ping command can see the printer If an IP address is not allocated to the printer or it is in a different LAN segment then ensure that either ...

Page 118: ...rsions 2 If the problem continues In Windows 95 98 boot into MS DOS mode and delete the sammon dll file in the windows system directory the restart Windows and reinstall SyncThru In Windows NT stop the spooler service using Services in Control Panel delete the sammon dll file in the windows system32 directory then restart the spooler service and reinstall SyncThru Unable to add the Port list of Sa...

Page 119: ...mber format Part numbers and descriptions are defined according to a company standard The information below will help you to understand the part number format and assist when ordering spare parts 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 specifi...

Page 120: ...arts List 7 2 7 1 Main Exploded Views 0 3 4 7 10 12 15 16 11 18 19 17 20 21 22 23 25 26 24 4 24 2 24 3 24 1 23 2 23 3 21 1 21 2 23 1 25 1 25 3 25 2 26 1 26 2 26 2 1 26 2 2 SCX 4521F SCX 4321 27 24 27 1 27 1 1 28 13 13 1 13 2 2 5 6 8 9 11 14 29 31 32 30 ...

Page 121: ...Assembly Exploded Views 0 2 3 MEA COVER PLATEN see to next page 2 1 2 2 2 2 1 2 2 2 2 2 3 2 2 4 3 1 3 2 3 5 3 4 3 3 1 1 1 1 2 1 2 5 1 2 6 1 2 8 1 2 7 1 2 9 1 2 1 1 2 3 1 2 4 1 3 1 4 1 5 1 6 1 7 1 7 1 8 1 9 1 10 1 11 1 12 1 13 1 14 1 11 1 15 1 11 1 17 1 18 1 7 1 7 1 14 1 2 2 ...

Page 122: ...Samsung Electronics Service Manual Exploded Views Parts List 7 4 7 3 Platen Cover Assembly Exploded Views 1 8 2 8 8 8 12 12 11 11 8 8 10 9 10 13 0 ...

Page 123: ...msung Electronics Service Manual 7 5 7 4 ADF Platen Assembly Exploded Views 0 1 2 ELA HOU OPE see to next page 1 1 1 2 1 2 1 1 2 2 1 2 3 1 2 4 1 2 5 1 2 6 1 2 7 1 3 1 4 1 5 1 14 1 6 1 7 1 8 1 9 1 10 1 11 1 12 1 13 2 1 2 2 2 3 2 4 ...

Page 124: ...amsung Electronics Service Manual Exploded Views Parts List 7 6 7 5 OPE Unit Exploded Views SCX 4521F 4in1 SCX 4321 3in1 0 1 15 13 11 6 10 7 12 9 8 3 2 4 17 16 3 12 5 13 7 6 11 10 8 9 3 4 0 2 14 14 17 16 ...

Page 125: ...Exploded Views Parts List Samsung Electronics Service Manual 7 7 7 6 Pick Up Unit Exploded Views 3 1 3 2 4 3 3 1 2 4 0 3 ...

Page 126: ...Samsung Electronics Service Manual Exploded Views Parts List 7 8 7 7 Main Frame Assembly Exploded Views 1 2 20 3 4 DC FAN 5 8 7 9 10 10 11 12 13 14 17 15 16 2 1 2 2 2 3 2 3 2 4 0 19 6 5 1 5 3 5 2 5 4 ...

Page 127: ...Exploded Views Parts List Samsung Electronics Service Manual 7 9 7 8 MP Tray Assembly Exploded Views 0 1 2 3 4 5 ...

Page 128: ...ronics Service Manual Exploded Views Parts List 7 10 7 9 Fuser Unit Exploded Views 0 1 3 5 4 3 6 7 8 9 10 11 12 13 14 28 6 7 29 30 31 32 33 36 34 2 15 16 17 18 23 19 27 27 27 27 27 3 27 2 27 1 20 21 22 24 25 26 5 5 ...

Page 129: ...oded Views Parts List Samsung Electronics Service Manual 7 11 7 10 Paper Path Assembly Exploded Views 0 1 2 3 4 5 25 6 7 8 9 9 1 9 2 9 3 10 10 11 11 1 11 2 11 3 12 13 14 16 16 15 17 18 19 20 21 24 23 24 22 ...

Page 130: ...ER M FRONT SCX 4521F HIPS 2 5 399 7 1 SA 7 1 24 2 JC63 00617A TRAY M CASSETTE ML 1610 HIPS 2 277 108 H SNA 7 1 24 3 JC63 00628A TRAY M EXTENSION LARGE ML 1610 HIPS 2 7 SNA 7 1 24 4 JC63 00629A TRAY M EXTENSION SMALL ML 1610 HIPS 2 SNA 7 1 25 JC96 03387A ELA HOU COVER MIDDLE SCX 4521F SEC WHITN SA 7 1 25 1 JC63 00653A COVER M MIDDLE SCX 4521F HIPS 2 5 437 2 SA 7 1 25 2 JC72 01351A PMO M STACKER SCX...

Page 131: ... ABS 2 5T SA 7 2 2 4 JC66 00594A SHAFT STACKER SCX 4114F SUM24L 31 2 4 SA 7 2 3 JC97 02204A MEA COVER OPEN SCX 4521F SEC COVER OPE SA 7 2 3 1 JC63 00658A COVER M ADF OPEN SCX 4521F HIPS 2 5 121 SA 7 2 3 2 JB75 00299A MEC ADF ROLLER ASSY SCX 1110F XRX XEROX SA 7 2 3 4 JB72 00843A PMO GUIDE PAPER SCX 1110F HIPS IV21 SA 7 2 3 5 JB75 00300A MEC PICK UP ROLLER ASSY SCX 1110F XRX XE SA 7 2 4 JC97 02205A...

Page 132: ...KUP SCX 4521F SEC PICKUP SA 7 6 1 JC66 00839A SHAFT M ADF SCX 4521F PC 184 52 6 9 BLAC SNA 7 6 2 JC72 00744A PMO SHAFT PICK UP SCX 5150 ABS BLK HB SA 7 6 3 1 JC61 01173A HOUSING M PICK_UP B ML 1610 ABS HB 3 P2068 SA 7 6 3 2 JC61 01151A HOUSING M PICK_U ML 1610 POM 35 NATU P2067 SA 7 6 3 3 JC73 00211A RUBBER PICK_UP ML 1610 EPDM IR MM P2148 SA 7 6 4 JC66 00811A CAM M PICK_UP ML 1610 POM 4 W21 PHI12...

Page 133: ...MOSTAT 150 ML 1610 125 250V 15 10A K4279 SA 7 9 21 JC67 00085A CAP M THERMO ML 1610 PET GF30 1 2 11 92 H4087 SNA 7 9 22 JC39 00403B CBF HARNESS FUSER 220V ML 1610 WIRE HAR SA 7 9 23 JC39 00045A CBF HARNESS THERMISTOR SF 5100 26 UL106 SA 7 9 24 JC66 00801A GEAR EXIT_DR38 25 ML 1610 POM 0 8 38 25 E4039 SNA 7 9 25 6031 001051 WASHER PLAIN M4 ID4 1 OD7 0 T0 13 POLY S2004 SNA 7 9 25 6031 000023 WASHER ...

Page 134: ...OLDER WIRE HSE 01 D3 SN 0 5CU 0 03NI SNA N A 0202 001492 SOLDER WIRE FLUX HSE 02 LFM48 SR 34 S SNA N A 0203 000007 TAPE FILAMENT 3M T0 15 W18 L55M TRP SNA N A 0203 001100 TAPE OPP MASKING OPP W75 CLR T0 05 W75 L SNA N A 0203 001189 TAPE ACETATE 810 T0 05 W12 L65000 TRP SNA N A 0204 000469 THINNER 4662 0 795 SNA N A 0204 002978 FLUX KSP 70L 84 FLUX SPRAY SNA N A 0205 000005 GREASE BEARING EP56 DIAM...

Page 135: ...UAL DEVE_SHEET SCX 4521F SEE EFGISPRS SNA N A JC68 01583F LABEL R POP_RU SCX 4321 RUSSIA PASCAL SNA N A JC68 01584A LABEL P BLANK 90 25 CLP 510 SEE ART 100 SA N A JC68 10914D LABEL P SERIAL NO ML 85 ART 70X15 G100 SNA N A JC68 10932B LABEL P BLANK YELLOW ML 1710 ART 100 SNA N A JC68 30928D LABEL P CAUTION HOT_FUSER ML 1210 PET SNA N A JC69 00809A CUSHION MAIN SCX 4521F EPS 195 466 502 SA N A JC72 ...

Page 136: ... 10W TP 1608 SA N A 2007 000116 R CHIP 120ohm 5 1 10W TP 1608 SA N A 2007 000120 R CHIP 680ohm 5 1 10W TP 1608 SA N A 2007 000123 R CHIP 1 5Kohm 5 1 10W TP 1608 SA N A 2007 000134 R CHIP 33Kohm 5 1 10W TP 1608 SA N A 2007 000402 R CHIP 150ohm 5 1 10W TP 1608 SA N A 2007 000539 R CHIP 200ohm 5 1 10W TP 1608 SA N A 2007 000729 R CHIP 300ohm 5 1 10W TP 1608 SA N A 2007 000730 R CHIP 300ohm 5 1 4W TP ...

Page 137: ...1610 SUS303 L24 D3 NTR SNA N A JC66 00828A ROLLER CHARGE ML 1610 NBR ECO D12 L230 N SNA N A JC66 00851A ROLLER DEVE ML 1610 CONDUCTIVE NBR D14 0 SNA N A JC67 00080A CAP M SPACER_R ML 1610 ABS 12 22 5 BLK SNA N A JC70 00153A IPR ELECTRODE CHARGE ML 4500 SUS301 8 SNA N A JC72 00083A PMO HOLDER CR SF 5100 POM BLK SNA N A JC72 00672A PCT LCD WINDOW SF 535E PC SHEET T0 38 SNA N A JC72 01349A PPR SPACER...

Page 138: ...002469 IC CMOS LOGIC 74HC14 SCHMITT INVERTER TS SA N A 1003 001102 IC MOTOR DRIVER TEA3718DP DIP 16P 300MIL SA N A 2001 001031 R CARBON 91KOHM 5 1 8W AA TP 1 8X3 2MM SA N A 2007 000033 R CHIP 0ohm 5 1 4W TP 3216 SA N A 2007 000075 R CHIP 220ohm 5 1 10W TP 1608 SA N A 2011 000660 R NET 1Kohm 5 1 16W L CHIP 8P TP 3 2x1 SA N A 2203 000998 C CER CHIP 0 047nF 5 50V C0G 1608 SA N A 2402 001049 C AL SMD ...

Page 139: ... 000490 R CARBON 200OHM 5 1 8W AA TP 1 8X3 2MM SA N A 2001 000626 R CARBON 300OHM 5 1 4W AA TP 2 4X6 4MM SA N A 2001 000864 R CARBON 56KOHM 5 1 8W AA TP 1 8X3 2MM SA N A 2005 000419 R WIRE WOUND NON 0 33ohm 1 1W AA TP 4 3 SNA N A 2201 000119 C CERAMIC DISC 100NF 80 20 50V Y5V TP SA N A 2201 000391 C CERAMIC DISC 0 022NF 5 50V SL TP 5X3M SA N A 2201 001057 C CERAMIC DISC 0 82NF 10 50V Y5P TP 5X3 SN...

Page 140: ...Block diagram Service Manual 8 2 Samsung Electronics 8 8 8 Block Diagram 8 1 System Block Diagram ...

Page 141: ...2 1 2 1 2 1 2 1 2 1 2 3 1 2 3 1 2 3 4 1 2 3 4 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 1 2 3 4 5 6 7 8 9 10 11 1 2 3 4 5 6 7 8 9 10 11 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 1 2 3 4 1 2 3 4 5 1 2 3 1 2 3 4 5 6 7 8 9 10 11 1 2 3 4 5 6 7 8 9 10 11 ...

Page 142: ...10 10 Schematic Diagram Service Manual 10 1 This Document can not be used without Samsung s authorization Samsung Electronics 10 Schematic Diagrams 10 1 Main Board 1 12 ...

Page 143: ...Schematic Diagram Service Manual 10 2 This Document can not be used without Samsung s authorization Samsung Electronics Main Board 2 12 ...

Page 144: ...Schematic Diagram Service Manual 10 3 This Document can not be used without Samsung s authorization Samsung Electronics Main Board 3 12 ...

Page 145: ...Schematic Diagram Service Manual 10 4 This Document can not be used without Samsung s authorization Samsung Electronics Main Board 4 12 ...

Page 146: ...Schematic Diagram Service Manual 10 5 This Document can not be used without Samsung s authorization Samsung Electronics Main Board 5 12 ...

Page 147: ...Schematic Diagram Service Manual 10 6 This Document can not be used without Samsung s authorization Samsung Electronics Main Board 6 12 ...

Page 148: ...Schematic Diagram Service Manual 10 7 This Document can not be used without Samsung s authorization Samsung Electronics Main Board 7 12 ...

Page 149: ...Schematic Diagram Service Manual 10 8 This Document can not be used without Samsung s authorization Samsung Electronics Main Board 8 12 ...

Page 150: ...Schematic Diagram Service Manual 10 9 This Document can not be used without Samsung s authorization Samsung Electronics Main Board 9 12 ...

Page 151: ...orization Samsung Electronics PN K KEY_ EY_4P 4P_7MM MM PN K KEY_ EY_4P 4P_7MM MM MICOM U1 MICOM U1 LC LCD BASI BASIC CHIN CHINA KO REA REA JB JB13 00004A 13 00004A JB JB13 00035A 13 00035A JC07 00003A JC07 00003A JC07 00008A JC07 00008A PN K KEY_ EY_4P 4P_9 5MM MM Not Us ed Main Board 10 12 ...

Page 152: ...Schematic Diagram Service Manual 10 11 This Document can not be used without Samsung s authorization Samsung Electronics Main Board 11 12 ...

Page 153: ...Schematic Diagram Service Manual 10 12 This Document can not be used without Samsung s authorization Samsung Electronics Main Board 12 12 ...

Page 154: ...550 C14 1KV101 L1 1018 C10 35V22uF D2 200V1A C9 1KV101 C102 35V680uF R109 1K PC101 B 817M B C8 333 GND A L101 4 7uH F G R115 4 7K R113 1W1 5K R114 1K Q101 KSC1008 R117 47K OP101 KPI 512 C108 50V103 0 0 0 0 PC102 TLP3061F AR1 SSG 102 A1 C3 684 LF2 0504V F2 250V3 15A C13 50V104 R14 1 4W100 R9 1 4W20 BD1 D3SBA60 C7 1KV221 C6 630V103 R104 5W1K R103 5W1K J1 BFS3550 C1 102 C2 102 R116 1 4W150 B101 5 5 2...

Page 155: ... 450V82uF F102 250V4A C106 50V105 MONO B1 BFS3550 L1 0835 C10 35V22uF D2 200V1A C102 35V680uF R109 1K PC101 B 817M B C8 333 GND A L101 4 7uH F G R115 4 7K R113 1W1 5K R114 1K Q101 KSC1008 R117 47K OP101 KPI 512 C108 50V103 C13 50V104 0 0 0 0 PC102 TLP3061F AR1 SSG 102 A1 C3 684 R14 1 4W22 C9 1KV221 R9 1 4W10 BD1 D3SBA60 C6 630V103 C7 1KV221 R104 5W1K R103 5W1K R116 1 4W150 D101 200V10A B2 BFS2550 ...

Page 156: ...526 Y C503 104 R510 47K R512 430 C504 333 R513 1W3 C505 2KV680 D502 6KV C506 3KV471 R516 1 2W51K R514 MGR1W15MF ZD501 1W200V 1 3 2 DEV 50K 18V 24VS2 R124 1W1 2K Q103 B1151 Y 24VS 5V R121 3 9K 24VS2 C113 25V47uF U103 KA7818 R401 100 U104 7407 5V C404 3KV471 Q104 KST2222A R411 1 2W2 2K C401 222 R502 1 2w2 2K R504 1 2w2K C501 104 U102 KA324 U102 KA324 R123 100 R122 1K R518 MGR1W15MF D501 1N4148 R519 ...

Page 157: ...2A473 C203 681 R206 130KF R207 330KF R210 5 6K D204 6KV C209 6KV221 TNR201 7N561K TNR202 7N471K C212 2KV221 ZD201 2 7B C211 6KV221 R213 BR1 2W100MF R305 BR1 2W50M D303 1N4148 R212 1 2W100K C304 3KV151 C301 104J R303 470 D301 D1NL20U R310 150J R308 1KF ZD302 2 7B 18V 18V 24VS2 IT301 IT 01 IT201 IT 01 C307 2A473J R203 1 2w2K C206 104J C306 2A473J R307 150KF U102 B KA324 Q301 KST2222A THV THV_READ TH...

Page 158: ... 6K CN3 Q1 KST2222A D1 1N4003 OP1 R8 100 LED1 24VS2____ 24VS2____ 24VS_____ 24VS_____ 3 3V_____ D_GND_____ 5V_______ P_EXIT____ THV_PWM___ THV_EN____ MHV_PWM___ THV_READ___ BIAS_PWM___ FAN_______ P_EMPTY____ CRU_DET___ KEY_IN____ TONER_SAVE ERROR_____ READY______ 24VS1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 CN1 2012 2012 CRU_DET GND 2012 2012 2012 2012 3 1 RED 2012 SKYLARK HVPS 2012 20...

Page 159: ...Schematic Diagram Service Manual 10 18 This Document can not be used without Samsung s authorization Samsung Electronics Whitney LD B d LD B d 1 1 ...

Page 160: ... recommended safe and easy troubleshooting as described in this service manual DVM Digital Volt Meter Standard Indicates more than 3 digits Driver Standard type type M3 long M3 short M2 long M2 short Tweezers Standard For general home use small type Cotton Swab Standard For general home use for medical service Cleaning Equipments Standard An IPA Isopropyl Alcohol dry wipe tissue or a gentle neutra...

Page 161: ...ctor CPU Central Processing Unit dB decibel dbA decibel A dBM decibel milliwatt DC direct current DCU Diagnostic Control Unit DPI Dot Per Inch DRAM Dynamic Random Access Memory DVM Digital Voltmeter ECP Enhanced Capability Port EDC Embedded Diagnostic control EEPROM Electronically Erasable Programmable Read Only Memory EMI Electro Magnetic Interference EP electrophotographic EPP Enhanced Parallel ...

Page 162: ...shy place NVRAM nonvolatile random access memory OPC Organic Photo Conductor OPE Operate Panel Equipment PBA Printed Board Assembly PCL Printer Command Language Printer Control Language PDL Page Discription Language PPM Page Per Minute PPS Pulse Per Second PS Post Script PTL Pre Transfer Lamp PWM Pulse Width Modulation Q PID Quick Printer Initiating Device Q ty quantity RAM Random Access Memory RO...

Page 163: ...gh room to open the printer trays covers and allow for proper ventilation see diagram below Provide the proper environment A firm level surface Away from the direct airflow of air conditioners heaters or ventilators Free of extreme fluctuations of temperature sunlight or humidity Clean dry and free of dust ...

Page 164: ...terns shown below are the standard test patterns used in the factory The life of the toner cartridge developer cartridge and printing speed are measured with the pattern shown below The A4 ISO 19752 standard pattern samples are reproduced reduced to 70 of the actual A4 size A4 ISO 19752 Standard Patterns ...

Page 165: ... Control part Operation Panel part PC Interface part Scan part Line Interface part Power part Each part is independent with each other and the design concept is common use standard design rule Chorus2 ASIC which is made for only printer is used in the Main Control part and another Micom which can communicate with Chorus2 through UART for Key Scan LCD display LED control etc is used for OPE Panel p...

Page 166: ...whole system according to the program code which stored in the Flash ROM memory Summary of the Key Function Block 1 8V for internal Core 3 3V for I O Pad with 4KByte Cache Image Processor included On Chip clock generator with PLL Memory and External Bank Control DMA Control 5 Channel Interrupt Control 2 port USB Host 1 port USB device ver 1 1 interface control Parallel interface control UART 2 Cha...

Page 167: ...then is converted to 8 bit digital data Image processor of the Chorus2 will do the Shading correction function at first then Gamma correction function next After then the data goes to different module according to the copy or FAX resolution mode When Text mode the image data goes to LAT module when Photo mode the image data goes to Error Diffusion module when PC Scan mode the image data goes direc...

Page 168: ...he Gain of the Line signal can be adjusted by setting the register value of the FAX modem chip Tx and Rx path is almost directly connected to the impedance matching transformer of the LIU Adjust Tx Level within Setting Level 0 2dB range Adjust Rx Level that has the same level as the TIMS out level if possible and must not exceed the TIMS out level 3 Speaker Driving Part Analog Switch MC14053BD mak...

Page 169: ... 6 Manual Tray 1 sheet 7 Driver Type Driving by Gearing from Main Motor 8 Pick_up Roller Driver Solenoid 9 Pick up Roller Rubber Material EPDM IR μ 1 3 or more 10 Pick up Velocity 94 8731mm Sec Process 93 0667mm sec 11 Paper detecting Sensor Photo Sensor 12 Paper Size Sensor None 13 Paper Separating Pad Material NBB 52 μ 0 8 1 2 14 Separating Pad Pressure TBD 150 gf 15 Pick_up Roller RPM 47 683 RP...

Page 170: ...ype Regulating toner layer by pressure Charge Roller Type Conductive Roller Contact Charge 9 Sanner Part 600dpi Color CIS Module for Flat bed SCX 4517F uses the CIS scanning method 1 CIS SPEC Scanning size 216 mm width for letter size Light source LED Scanning sensor CIS 600 300 dpi Scanning mode Color SCAN Mono SCAN MTF 30 300 dpi Chart CIS interface Analog output Power supply 3 3V Clock Frequenc...

Page 171: ...h 208 mm 6 ADF Motor a Motor Spec 정격전압 24V DC 정격전류 0 6A Peak 7 Motor Driver speed method a FAX Transmission Normal Mode 2000 pps 2 2 Fine Mode 1000 pps 2 2 Super Fine Mode 667 pps 2 2 b Copy Job 667 pps 2 2 max 30sheets 50gf min 1sheets 20gf 8 Document Detect sensor a Type Photo interrupt c LED max current 30mA max voltage 3 3V d Output Logic H Not Paper Logic L Paper e Lever Sensor DOC ADF Lower ...

Page 172: ... Job Return to default Menu Option select Upper Level Return to upper level menu Enter Option select Execute Next menu or Next option item Previous menu or Previous option item 2 Save Toner Save TONER SAVE MODE select 3 Copy Reduce Enlarge Select ZOOM ratio when copy No of Copies Select the number of copies Original Type Change Copy Modes Text Text Photo Photo Darkness Change the Darkness of the C...

Page 173: ...3 LCD Part Number of Characters 16 Characters x 2 line Clock Date display System Status display Alarm Error Message display Function Dialog Message display ...

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