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Содержание 400 DPI

Страница 1: ...I I SERVICE MANUAL MAR 1988...

Страница 2: ...description of the principles of operation of the electrical and mechanical systems the1r functions and timing of operations Chapter 3 The Mechan1cal System Explanation of mechanical operation disass...

Страница 3: ...tem 2 28 CHAPTER 3 THE MECHANICAL SYSTEM I II Ill IV V EXTERNALS 3 1 A Covers and Panels 3 1 B Fan 3 3 C Ozone Filter 3 3 D AC Controller Unit 3 4 DRIVE SYSTEM 3 6 A Main Motor Unit 3 6 PAPER TRANSPOR...

Страница 4: ...Pow er Tester 6 4 PARTS FUNCTION 6 31 Ill MEASUREMENT AND A Switches Photointerrupters ADJUSTMENT 6 5 and Solenoids 6 31 A Image Adjustment 6 5 B Motor and Others 6 32 B Mechanical Adjustments 6 5 C...

Страница 5: ...CHAPTER 1 GENERAL DESCRIPTION I FEATURES 1 1 IV PARTS OF THE PRINTER 1 5 II SPECIFICATIONS 1 2 V OPERATION 1 7 Ill SAFETY INFORMATION 1 4...

Страница 6: ...into a single assembly called an EP S cartridge The cartridge can be replaced by the customer when necessary High printing quality is maintained by a simple cleaning procedure The printer can be opene...

Страница 7: ...le time from when a Sig nal is received by the printer while in READY state at an ambient temperature of 20 C until an A4 or Letter sized sheet is printed and delivered 2 min or less after power on un...

Страница 8: ...on operatmg env ronment l 1ooc to 32 5 C 50 F 91 Fl 20 to 80 RH 570mmHg to 760mmHg 0m 2500m Under 50dB Al PAINTING Under 45d8 A STANDBY 1 m away from the pnnter 363mm X 423mm x 180mm About 14kg Max 54...

Страница 9: ...nding on the pnnter model 1 4 B Addit ional Information When servicmg or adjustmg the opt1cal sys tem of the pnnter be careful not to place screwdrivers or other reflective objects in the path of the...

Страница 10: ...A External View Figure 1 3 Figure 1 4 j Cassette holder Upper unit release Upper cover Delivery tray Power cord receptacle Lower cover j Interface connector EP S cartridge Voltage selector Print dens...

Страница 11: ...ning exposure lamps Primary corona unit M irror Upper cover Pick up roller j Lower cover Separation pad rr I I I ID I I I Figure 1 5 Registration rollers j Transfer corona unit Photosensitive drum Fee...

Страница 12: ...d the ROY sig nal has been made TRUE by the printer pressing the button will cause the printer to print a page of the test pattern If the button is held down the printer w ill pnnt the test pattern co...

Страница 13: ...a bar over it e g Pi l5 L is a TRUE signal A TRUE signal will usually cause an action to occur etc a FALSE signal will normally prevent the operation I BASIC OPERATION 2 1 A Functions 2 1 B Outline o...

Страница 14: ...aper pick upt feed system To external device host computer n_____ _________ I ln erfaca PCB I INTERFACE SYSTEM 1 L _j r ____ y____ __________ I I IOVERALL CONTROL OC control ler PCB SYSTEM I L __ SL _...

Страница 15: ...via the interface PCB 2 2 I I I I I I I I I I I I I I L _ l u 4icc I I I I I l I l Optical fiber Laser diode Scanner motor DC High voltage controller PCB unit Cassette so ze sensing switch Driver sens...

Страница 16: ...a a I J r 4 PEMP H when cassette has paper s I tJ Manual feed un1t paper sensor I tl 9______ 9 MPFS H when there IS no pacer on manual feed travl I Drum senSitiVtW ident1ficat1on switches EP S cartro...

Страница 17: ...1on roller cluten solenoid 2 4 2 J J 2 1 LOAV H to swttch laser ON PO Voltage 1n propOrtiOn to tntensitv of laser beaml OSAOJ r r_ __ __ _ __ _ __ __ __ __ _J_20_3_ 7 24VA I r S i SCNCONT H to drtve s...

Страница 18: ...sure 1 9 amps Lamoboard scanner untt h o ustng Precondrttonrng ___ exposure I r m3 board I I J801 2 i S I ____ J Safety PCB Figure 2 5 r 1 u controller PCB 2 2 PEXPO L to swrtcn lamps ON preconditronr...

Страница 19: ...period fixing roller temperature reaches 165 C Two minutes or less man 1 ambient temperature of 1 2o c1 I STBY IFrom the end of the WAIT Fixing roller held at 165 C T STANDBY period until to keep the...

Страница 20: ...OTATIONS 1 pnmary corona goes OFF devace the INITIAL period ROTA TIONS peraod begans I a mmedaately LSTA2 From when the primary Last pranted page delivered I If a PANT signal is anputted FINAL corona...

Страница 21: ...e drum via a mirror Each face of the scanning mirror in turn scans the beam across the drum The drum also rotates at a constant speed As it rotates the laser beam successively scans across its surface...

Страница 22: ...and return to its original position the drum surface has shifted downward by about 85 u m 300 raster lines inch or about 64 u m 400 raster lines inch The laser driver circuit includes switches SW301...

Страница 23: ...as current controller is 80 of the drive voltage to the diode reached when the monitor voltage reached its allowable limit At this bias current the laser diode emits no light Bias current determinatio...

Страница 24: ...rom the interface PCB it out puts the data of the paper information signals to the sub microprocessor S CPU by an SDATA signal 2 The paper size information is used by the main microprocessor M CPU to...

Страница 25: ...peed is set for 300 DPI The speed is changed only when PANT is H and is changed only after a complete page has been printed The frequency of the signal from a crystal controlled oscillator X201 is div...

Страница 26: ...N frequency Increases motor sp ed max I Decreases motor speed m n TooSii N r fOcliast Too slow Too fast Target speed I Linear resPonse lock range FGIN freQuency motor speed Figure 2 16 2 APC output an...

Страница 27: ...sfe r coro na Lower fol ong rOller B Printing Process Feeder elomonator Figure 2 18 The cartridge used by the printer has a seamless photosensitive drum with the struc ture shown in Figure 2 1 9 The o...

Страница 28: ...y resistivity of the drum umform and prepares it to receive a uniform charge 1n the following primary corona step thus preventmg unevenness in the printed rmage Reference The drum surfaoe potential be...

Страница 29: ...Magnet A concentrated magnetic field develops be tween the magnet and the blade and attracts parttcles to the edge of the blade They are held almost 1mmob1le ltke a cur tam Th1s curtatn sktms the ton...

Страница 30: ...inder D 1 d eveloptng cv tn er M n _Toner 0 DCbtas AC btas g level Drum DC b as v _ Drum surface 11r Time tl potenttal Table 2 8 i Descnpt1on The electrostatic attract1on I caused by the difference in...

Страница 31: ...In the fixmg stage the toner 1mage s fixed by heatmg the paper and applying pressure Thts fuses the toner part1cles onto the paper to make a permanent 1 mage Step 7 Fixing Fnung roller _ cleaner g F...

Страница 32: ...the output from this sensor falls below a certa1n level the printer sets status 15 bit 6 to 1 and m forms the external device that the pnnter IS almost out of toner and that the cartridge will soon ne...

Страница 33: ...ode POWER lSS c ON PANT About 0 5 IOC l tC AOOut 1 J JK I I J ote About DC bias L oout J 1 r 1 ltC 0 6 e I a r 1 4 stc j I I Developong boas AC bias I I Out 0 05 ee 1 AtK ur 0 4 otc r 11 Figure 2 33 N...

Страница 34: ...a train of pulses is output ted from pin 1 of Q 1 to the primary wind ings of transformer T3 LED1 goes ON when HV1 ON is L The secondary wind ings of T3 output voltage P for the primary corona dischar...

Страница 35: ...cylin der When there is toner between the cylin der and sensor the field sensed by the sen sor 1s strong when there is insufficient toner the sensed field is weak The voltage analog of s1gnal TSENS i...

Страница 36: ...er sensor g a oE 1 E oo u w Z a 0 Main motor The paper is fed by the registration rollers so that the leading edge of the paper is aligned with the leading edge of the toner image on the photosensitiv...

Страница 37: ...up roller clutch solenoid SL30 1 The main motor M 1 turns the pick up roller one turn feeding a sheet of paper to the regis tration rollers The registration rollers are not turning when the paper rea...

Страница 38: ...y 4tr J _ _j I 0152 L Troac 2 Principle of Operation Since the contacts of relay RL 101 of the AC controller are normally closed when the DC controller outputs the FIXING ROLLER HEATEA DRIVE FSRDl com...

Страница 39: ...perature of 21 0 C 10 C If the fixing roller temperature rises above this point TP1 cuts off the current to the fixing roller heater 3 Overcurrent protection This is a c1rcu1t breaker CB101 in the pow...

Страница 40: ...3 There is a sheet of paper at the delivery unit paper sensor when the power is sw1tched ON The paper is automatically fed out 1 f the fixing unit temperature is greater than the specified temperature...

Страница 41: ...I IPCONTl Owooo 1 TTlf L J LJ B Protective System Low voltage power supply Switching control circuit Figure 2 41 24VB r 24VC _ r 24VA i 24 vo 1 o 1 5V I r ORSW t r RESET Jf 5 v If a short circuit or o...

Страница 42: ...ing the pnnter 4 Do not operate the printer w1th any part removed 5 To protect the laser device from stat1c electnc1ty connect the shorting connector to laser connector J202 when J202 is disconnected...

Страница 43: ...en off simply by removing screws is omitted 1 Upper cover 1 Open the printer 2 Remove the two screws from the upper cover CD Screws Upper cover Figure 3 2 3 Push up on the upper cover with both hands...

Страница 44: ...Remove the fourteen screws and remove the base cover CD Screws Figure 3 6 3 2 4 Front bottom cover blanking plate for the test connector slot and TEST PRINT button 1 Remove the upper cover 2 Remove t...

Страница 45: ...he three screws and remove the fan mounting plate Q Ozone filter Screws Figure 3 8 51 Disconnect the connector J 153 6 Remove the two screws and remove the fan motor unit FM 1I D Screws Fan motor unit...

Страница 46: ...C controller unit 1l Open the pnnter 2 Remove the upper cover and lower unit 3 Disconnect the connector J 1 12 CD Connector J 11 2 Figure 3 12 3 4 4 Remove the ozone filter 5 Remove the fan mounting p...

Страница 47: ...3 Remove the two screws and remove the safety PCB CD Connector J 152 Screws Safety PCB Figure 3 16 4 Remove the two screws and remove the AC controller PCB from the PCB cover I I CD Screws AC controll...

Страница 48: ...the upper cover and lower cover 3 Remove the sensor power supply unit 4 Remove the p1ck up roller unit 5 Remove the feed guide unit 6 Remove the fixing unit 7 Remove the seven screws disconnect the t...

Страница 49: ...liary feed roller Pick up roller unit Figure 3 23 Note When removing the pick up unit be es pecially careful not to press or force the auxiliary feed roller for its mounts can easily be damaged and it...

Страница 50: ...can easily be replaced and returned to its origi nal position However a special gauge is required to locate the clutch at the correct position For this reason never replace the pick up roller clutch i...

Страница 51: ...stration roller shaft 2 4 D Setscrew Clutch drum Control ring Gear Figure 3 29 3 Remove the spnng D Spring Figure 3 30 4 Remove the hold down spring and E ring and then remove the two bushmgs D Spring...

Страница 52: ...hmg CD E rings Gear 3 10 Bushing Figure 3 34 8 Remove the two E rings and bushings 9 Remove the lower reg1stration roller CD E rings Bushings Lower registration roller Figure 3 35 B Feed Guide Unit 1...

Страница 53: ...scanner unrt 1 Open the printer 2 Remove the upper cover I 3 Remove the two screws and the blocks holding the lampboard scanner unit housing then remove the housing CD Blocks Screws Lampboard stanner...

Страница 54: ...unit It is not field adjustable 3 12 B Preconditioning Exposure Lampboard 1 Removing the preconditioning expos ure lampboard 1 Open the printer 2 Remove the upper cover 3 Remove the two screws and the...

Страница 55: ...ve the two screws and remove the preconditioning exposure lampboard unit D Screws Preconditioning exposure lampboard unit Figure 3 45 7 Remove the preconditioning exposure unit cover plate then remove...

Страница 56: ...oping unit Photosensitive drum Protective shield Primary corona unit CD Drum cleaning un1 t Figure 3 46 a Protective shield The photosensitive drum is protected by a protective shield that prevents ex...

Страница 57: ...sfer Corona Unit 1 Removing the transfer corona unit 1 Open the printer 2 Remove the upper cover and lower cover 3 Remove the sensor1power supply unit 4 Remove the pick up roller unit 5 Remove the two...

Страница 58: ...the transfer cor ona un1t 1l Prepare about 850mm nylon line 2 W ind one end of the nylon line around screw A of the transfer corona unit See Figure 3 51 3 W ind the nylon line tightly around the cor...

Страница 59: ...untt entry guide Lower fixing roller j Lower delivery roller Figure 3 52 2 Removing the ftxing unit 1 Open the printer 2 Remove the upper cover lower cover and delivery unit cover 3 Remove the fixing...

Страница 60: ...plate Figure 3 55 2 Remove the screw and remove the left ter mtnal cover CD Screw Left terminal cover Figure 3 56 3 18 3 Remove the three screws and remove the lead wire and left terminal holder CD S...

Страница 61: ...Screw Left heater cover Fixing roller heater Figure 3 60 l j 8 Pull the fixing roller heater carefully out of the upper roller b Thermoswitch and thermistor 1 Remove the left terminal cover 1 and righ...

Страница 62: ...J206 J201 Figure 3 64 J21 1 J21 7 Q J2 3 4 Remove the two screws holding the con nector and the four screws holding the DC controller PCB 5 Separate the DC controller PCB from the main unit I CD Screw...

Страница 63: ...e the dnver and sensor PCB from the low voltage power supply 3 CD Screws Driver and sensor PCB Low voltage power supply Figure 3 68 C High Voltage Power Supply 1 Open the pnnter 2 Remove the upper cov...

Страница 64: ...s Signal ground PCB HVT Figure 3 71 E Cassette Size Sensing Swit ch PCB 1 Open the printer 2 Remove the upper cover and lower cover 3 Remove the sensort power supply 4 Remove the four screws and the H...

Страница 65: ...the printer correctly The serviceman should have a complete knowledge of the printer choose a good locatton and check the printer out before it is used I CHOOSING A LOCATION 4 1 A Storage of Sealed II...

Страница 66: ...irect sun light If it has to be placed in a sunny place the wmdow s should be curtained to avoid direct sunlight The location should be well ventilated The pnnter should be placed on a sturdy level su...

Страница 67: ...c bag from around the printer Remove the tape securing components Cardboard box 4 2 l Check I Remarks I See Figure 4 2 I I See Figure 4 2 Check that the following are I present I Cassette I Delivery t...

Страница 68: ...e Figure 4 5 the EP S cartndge and take out are present the cartrrdge Remove the Fixing roller cleaning pad aluminum bag Cotton swab Instructtons for cartndge lnstructtons for ustng fixing roller clea...

Страница 69: ...the I paper s1ze and set the paper size I Identification slider Put paper in I I I I the cassette put the cover on the I I cassette then put the cassette 10 I I the prmter I I 15 Connect the pnnter to...

Страница 70: ...leave an EP S cartridge in a car for an extended period in warm weather because the interior tem perature may become excessively high 2 Avoid places w ith too high or too low temperature and or humidi...

Страница 71: ...ear on prints despite these If this happens stop the printer for a while This will usually solve the problem Note the following 1 Clear paper jams and change the cartridge as quickly as possible to mi...

Страница 72: ...AND SERVICING I PARTS REPLACEMENT SCHEDULE 5 1 II CONSUMABLES 5 1 Ill LISTS OF TOOLS 5 2 IV LIST OF LUBRICANTS CLEANERS 5 4 V SERVICE CHECKPOINTS 5 5 A Standard Tools 5 2 VI MAINTENANCE BY CUSTOMER 5...

Страница 73: ...I PARTS REPLACEMENT SCHEDULE None II CONSUMABLE None 5 1...

Страница 74: ...flat blade screwdriver set CK 0114 I l 1 1 Allen wrench set CK 0151 12 F1le fine CK 0161 13 j Allen hex key CK 0170 I M4 14 Diagonal cuttmg pliers I CK 0201 15 I Needle nose pliers I CK 0202 i 16 Plie...

Страница 75: ...r I measunng or adjustmg I laser power I I I 2 I Pnnter dnvefl RY9 0024 B Test pnnter funct1on and I 1 laser dnver laser power tester 1 li I I i ijl 0 r v of I i I i 3 Laser shortmg RY9 0025 B 1 Prote...

Страница 76: ...il T68 ISO VG 220 otl ESSO Febis K220 MOBIL Vactra oil no 4 SHELL Tonna oil T220 Use Cleanmg 1 plastic rubber external Iparts Cleamng I 011 and toner statns I i Apply to dnve mechanism Forbeanngs Regi...

Страница 77: ...never the cartridge is replaced Fixing unit Clean the fixing unit when the cartndge is replaced Transfer corona unit Clean the transfer corona unit when the cartridge is replaced Primary corona unit C...

Страница 78: ...es of Image Defects 6 10 B How to Jse the Troubleshooting Tables 6 11 C Troubleshooting Image Defects 6 12 V TROUBLESHOOTING MALFUNCTIONS 6 22 VI PAPER TRANSPORT TROUBLESHOOTING 6 28 A Print Paper Jam...

Страница 79: ...4 7 in chapter 4 b If that does not improve the prints replace the cartridge with a new one 5 The transfer and feed guide plates are clean If they are dirty clean them with damp cloth 6 The fixing rol...

Страница 80: ...ntrol panel e r _ c 0 l r Figure 6 2 Control panel of the printer driver laser driver tester TEST PRINT Causes the pnnter to pnnt a pattern spect fied by VIDEO SELECT VIDEO SELECT Selects a test patte...

Страница 81: ...0 2 NC J21 0 3 NC J21 0 4 DBDC L to apply DC developing bias J21 0 5 1 sv J21 0 6 DBAC L to apply AC developing bias J2 0 7 GND J21 0 8 HV10N L to apply DC high voltage to primary corona J210 9 sv J2...

Страница 82: ...B Laser Power Tester Figure 6 3 The laser power tester is used with a digital multimeter to measure laser power Use the tester as shown below I Figure 6 4 6 4...

Страница 83: ...not correct a fixing problem may occur Follow the procedure below to check the nip width 1 Either take along one or two all black A4i Letter size copies made with a copier or make such a black copy u...

Страница 84: ...followed to determme whether the fault lies w ith the lasertscanner umt or the DC controller PCB Spectal attention should be given to the fol lowtng tems during troubleshooting Plug the lead into the...

Страница 85: ...drover tester J210 J202 Connector 120 pons DC controller PCB U TP208 J202 J J210 T8 01 Connector 5 pons I C 1 J Oigotal multo meter COMV n 9 I Figure 6 9 Printer dnver laser drover tester DC controlle...

Страница 86: ...aper 1 7 Vertical black streaks 1 8 Thm black honzontal 1 9 Irregular and 1 1 0 Irregular and 1 11 Blank spots smudged vertical bands smudged horizontal bands lP streaks 1 12 Solid vertical white line...

Страница 87: ...sult 1 Measure 1 NO Plug tt tn NO I NO NO YES 1 Close tt Reset tt j Nottfy the customer that this is not a printer problem 1 1Check the door switch 1 Replace it if it is faulty _ _ _ ____J The above t...

Страница 88: ...2 1 1 3 and J2 1 1 2 GNDl drop from about 16VDC to OV Three seconds after the ma1 n motor starts does the voltage between I J2 11 5 t SAC and J211 2 IGND drop from about 16VOC to OV 6 12 Result I I Me...

Страница 89: ...and J30 1 6 GND drop from about 5VDC to OV When drum sensitivity Identification I Iswitch SW302 is pressed does the voltage between J301 2 CSENS2l Iand J30 1 6 GNDI drop from about svoc to ov Laser an...

Страница 90: ...voltage between J301 2 CSENS2l i I and J 30 1 6 GND drop from about 5VDC toOV High voltage I 2 I Clean the contact between the high YES Make sure that the ground1ng connector j voltage connector grou...

Страница 91: ...s after the matn motor I voltage connector is making good starts does the voltage between I 1contact with the developing b1as J702 4 DBAC and J702 7 IGND Icontact If so replace the high drop from abou...

Страница 92: ...e connector and the static charge elimanator then make a test print Is the print normal Result I Measure YES 1 Replace the cartridge YES 1 Check the wiring from connector 1 J702 to J 701 whether 1 con...

Страница 93: ...th 1 Is the transfer gUide d rtY7 I YES Clean 1t w1th a damp cloth then I w1pe 1t w1th a dry cloth 1 Is the transfer corona umt d1rty7 YES Clean 1t w th a damp cloth then I I wipe it w1th a dry cloth...

Страница 94: ...e cleaner and make a test prrnt Is the prrnt normal7 I 1 10 Irregular and smudged horizontal bands Possrble Cause Step Check Photosensrtive 1 Do the bands appear at regular drum intervals7 Fixing roll...

Страница 95: ...rona unit Result Measure YES Replace the paper NO Result YES YES NO wrap and Advise the customer to store print paper to pre from absorbing moistu vent 1 t re Check that the develop ng b1as s normal M...

Страница 96: ...I Driver and sensor 5 Three seconds after the main motor YES Replace the driver and sensor PCB starts does the voltage between I 1 PCB DC controller PCB J301 3 REGDl and J301 6 GND NO 1 Replace the D...

Страница 97: ...le Cause Check Result Measure Is the paper size identification slider i NO Set it correctly to the correct position 1 17 Incorrect resolution LP LP enlarged reduced Possible Cause Step Check Result Me...

Страница 98: ...age power 4 I Unplug connector J60 1 from the I YES IReplace the low voltage power supply low voltage power supply Is the I supply AC controller untt correct voltage present between I NO j Replace the...

Страница 99: ...tage 5 Are the connector pms of the h1gh YES IClean the high voltage connector connector I I voltage cable for developing bias I and the toner sensor dirty I Gfld of prrmarv Oevelopong b1 as Promarv c...

Страница 100: ...when a Cassette is out of Paper Poss1ble Cause Driver and sensor PCB DC controller PCB Step I l Check 1 Result I Measure When the cassette is empty 1 s the voltage between connector J30 1 8 1 NO I Re...

Страница 101: ...Main Motor Driver and sensor 2 1 Measure the voltage across I NO Replace the driver and sensor I PCB connector pins J30 1 9 MPFSl and PCB J301 6 GNDl when there is no I paper on the manual feed tray D...

Страница 102: ...power supply case from about 5VDC to OV at I some time during the printing cycle i 1 NO Replace the DC controller PCB Prtmary corona untt J702 3 r Develop ng btas ACl J702 4 Developtng btas DC J702 6...

Страница 103: ...e the AC controller un1t ON does the voltage between connector pins J208 2 and I I 1 J208 3 GNDI of the DC controller PCB go from about 5VDC to OV I DC controller PCB 5 Check that there is a cartndge...

Страница 104: ...asses through three major sections CD pick up section separation and feeder sect1on fixing and delivery section This section explains troubleshooting for jams n each of these sections CD Pick up secti...

Страница 105: ...ce the spring I clutch rusted or worn Dnver and sensor I 8 Three seconds after the mam motor I YES Replace the dnver and sensor PCB I starts does the voltage between PCB I DC controller PCB J301 3 REG...

Страница 106: ...Open the pnnter while the sheet of 1 paper IS passing through the feeder 1 unit Is the paper deformed creased 1 folded etc Entrance gUtde 4 iIs the entrance gutde dirty Fixtng un t 6 30 Result Measure...

Страница 107: ...M 3 3 II I Top voew Right side voew PSJJ1 Front VIIIW Figure 6 14 No Function Sensing drum sensitivity SW301 SW302 sw 1 sw 2 Cutting off 24VB and 24VC when printer IS open Sensing if printer is open P...

Страница 108: ...6 32 L Rear voew F M 1 f J TH1 M 3 1 Top view Right side voew Front view Figure 6 15 No M1 M3 FM1 Hl TH1 Function Drive motor for drum p1 ck up roller and paper feed roller Drive motor for scanning mi...

Страница 109: ...nd external device 3 High voltage power Applying high voltage to primary corona and transfer corona units supply PCB Amplification of toner sensor output 4 IDriver and sensor PCB Mount for vanous sens...

Страница 110: ...J501 9 J1 51 4 Safety PCB J502 3 J152 6 AC controller PCB J601 3 J 153 l 2 Fan motor FM 1l J602 14 J261 I 4 Cassette size sensing sw tch PCB J701 8 J301 9 Driver and sensor PCB J702 8 J40 1 I 5 Scanne...

Страница 111: ...not touch them dunng after sale service Notes 1 Some of the LED indicators receive leakage current during normal operation causing a dim glow even when they should be OFF 2 Potentiometers which may be...

Страница 112: ...m intens1ty Table 6 10 B HVT PCB 0 VR1 V R3 VR2 LED2 LED1 J701 8 Figure 6 19 VRNo Purpose LED No Function VAl 1 Adjusting developing bias DC Variable with print density LED 1 1 For indicating state of...

Страница 113: ...0 Driver and sensor PCB rn SW301 SW302 J301 Figure 6 20 SWNo I Function SW30 1 1 For identtfying drum sensitivtty I S W_3_0_2 __ See Table 2 3 fordetatls Table 6 13 6 37...

Страница 114: ...ENERAL TIMING CHART A 1 II LIST OF SIGNALS COMMANDS A 3 A DC Cont roller A 3 Ill GENERAL CIRCUIT DIAGRAM A 5 IV DC CONTROLLER A 6 V SAFETY CIRCUIT A 11 VI HIGH VOLTAGE POWER SUPPLY A 12 VII INTERFACE...

Страница 115: ...nd operate CSENS1 DRUM SENSITIVITY IDENTIFICATION signals Indicate the sensitivity of the photosensitive CSENS2 drum DBAC DEVELOPING BIAS AC DRIVEcommand Causes bias voltage to be applied to DBDC DEVE...

Страница 116: ...rate PPRDY PRINTER POWER READY signal Indicates that the printer power s ON ROY READY signal Indicates that printing is possible REGD REGISTRATION ROLLER CLUTCH SOLENOID Causes the registration roller...

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