Manuals / Toshiba / Computer Equipment / All in One Printer

Toshiba 453, 452, 350, 353 service manual Laser unit, Paper feeder unit

Models: 350 353 453 452

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[E] Laser unit

M2

LDR

Fig. 2-207

[F] Paper feeder unit

CLT1

2

SNS

Front side

		S20	CLT2
			CLT2
		S22	S16
	S21		S16
	S21
S23			S18
S23

S17

S19

Front side

Fig. 2-208

© 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved 2 -	e-STUDIO350/352/353/450/452/453
	OUTLINE OF THE MACHINE

Image 29

Toshiba 453, 452, 350, 353 service manual Laser unit, Paper feeder unit

Contents

STUDIO350/450 e-STUDIO352/452 e-STUDIO353/453 Trademarks Service of Machines Transportation / InstallationMain Service Parts for Safety Contents Scanner 11-1 12-4 12.412-5 12-7Specifications Approx seconds temperature 20C System copy speed Copy mode SecSet 55.47 54.68 Sets 126.21 118.07 Sets 196.93 181.36LCF-Option Stack height 137.5 mm x 2 equivalent to Automatic duplexing unit Stackless, Switchback typeSheets 64 to 80 g/m2 17 to 22 lb 80 g/m2 17 to 22 lbSpecifications Accessories STUDIO350/450 Options2nd line for fax board STUDIO352/353/452/45307/11 Supplies Radf System ListSTAPLE-2000 12 2003 2008 Toshiba TEC Corporation All rights reserved Sectional View Outline of the Machine04/05 0 22 24 25 2 27 2 2003 2008 Toshiba TEC Corporation All rights reserved Unit construction Electric Parts LayoutLT series Scanner unit Motor, sensor, lampA4 series Control panel unit PC board, heater, thermostat, other partASD/AUD/CND/SAD/TWD models Standard NAD/MJD models Option Motor, sensor, lamp, heater, thermistor, thermostat Process unit Motor, sensor, switch, PC boardPaper feeder unit Laser unitBypass unit Transport unitFuser unit Automatic duplexing unitCLT5 CLT6 CLT7 CLT8 HVT Drive unitSTUDIO350/450 PC board unitSTUDIO352/353/452/453 Symbols and Functions of Various Components Sensors and switches CST-L-SW CST-U-SWSFB-SNR SFB-FED-SNRSolenoids Electromagnetic clutchesPC boards Thermistors and thermostats Lamps and heatersOthers TransformerGeneral Description System block diagram2003 2008 Toshiba TEC Function of each board Construction of boards Construction diagram of boardsOutline of the Machine HVT External covers Front cover Installation and Replacement Covers and PC boardsFront left cover Open the front cover Remove 1 screw and front left coverRemove 7 screws and take off the rear cover Rear cover STUDIO350/450Front upper cover Left upper coverRight upper cover Upper rear coverRemove 2 screws and take off the receiving tray Receiving trayTray back cover Left coverIH terminal cover Left rear coverRight front hinge cover STUDIO350/352/353/450/452/453Front right cover Right lower coverRight rear cover LGC board unit PC boardsLogic PC board LGC board A-1 LGC board Hard disk / HDD cooling fan SYS board cover Remove 4 screws and take off the hard diskHard disk System control PC board case SYS board case STUDIO350/450HDD cooling fan 05/1107/11 NIC board NIC board / System control PC board SYS board STUDIO350/450Remove 10 screws, take off the SYS board SYS board Switching power supplyNoise filter Power supply cooling fanHigh-voltage transformer MR-3015 Reversing Automatic Document Feeder Radf KD-1011 Paper Feed Pedestal PFP Turn OFF the power and unplug the power CableKD-1012 Large Capacity Feeder LCF 44 2003 2008 Toshiba TEC Corporation All rights reserved Lift up the equipment and take off the LCF MJ-1022 Hanging finisher D-1 When PFP/LCF is not installedRemove 2 screws Lift up the finisher and take it off When PFP/LCF is installedMJ-1023 Console finisher 48 2003 2008 Toshiba TEC Corporation All rights reserved MJ-1024 Console finisher MJ-6004 Hole punch unit Outline of the Machine 52 2003 2008 Toshiba TEC Corporation All rights reserved KN-3520 Bridge unit Lift up the punch unit and take it offMJ-5004 Job separator Outline of the Machine MJ-5005 Offset tray MR-3018 Reversing Automatic Document Feeder Radf 58 2003 2008 Toshiba TEC Corporation All rights reserved MJ-6101Hole punch unit MJ-1101 Console finisher60 2003 2008 Toshiba TEC Corporation All rights reserved Remove 2 screws Take off the hole punch unit 62 2003 2008 Toshiba TEC Corporation All rights reserved General Description of Copying Process Copy ProcessExample Details of Copying ProcessImage processing sec Tion Example CCD light Value of image Magnet Magnetic roller Toner 30-100 µm Additional Explanation Charger Because of moisture or malfunction of the transfer Paper may not be separated from the drum surfaceSeparation charger during printing. As the result Used to forcibly separate the paper which was leftRecovery blade Cleaning blade Drum rotation Comparison with DP4500/3500 Description of Operation Overview of OperationCopying operation Bypass feed copying Interrupt copying Warming-upDrawer feed copying Upper drawer paper feeding Ready state ready for copyingGeneral Operation Page Press the Interrupt button Bypass feed copyingInterruption copying Types of abnormality Detection of AbnormalityDescription of abnormality General Operation Paper jam E010 Paper jam E010 → The copying operation is stopped. TimerPaper jam E020 General Operation Immediately after the power is turned on Flow ChartYES Paper jam E00 Automatic paper feed copyingReady 16 2003 2008 Toshiba TEC Corporation All rights reserved Control Panel and Display Panel Control PanelItems Shown on the Display Panel Display Tray Full Ready Saddle StitchChange Drawer To Correct Paper Size CopyingThis Size Paper Check PaperLarge Capacity Feeder Cannot Punch To Correct Media Type Press Basic DepartmentCounter According to the messages displayed Radf Structure Dot matrix LCD circuitSystem control PC board Control panel Method of LED display ex Displaying Copy Data TransmissionLED display circuit Disassembly and Replacement Hinge bracket DSP boardKEY board Remove 16 screws and take off the KEY boardFunction ScannerConstruction Mirror-2 Mirror-3 Scan motor Scanning drive circuit Motdir MotclkMoten MotrefInitialization at power-ON General description Control of Exposure LampExposure lamp Working conditions Control circuit for the exposure lampSLG board Shading correction General Description of CCD ControlOpto-electronic conversion Principle of original size detection Automatic Original Size Detection CircuitProcess of detection of original size A4 Series LT SeriesStlt APS-C APS-R When the platen sensor is OFFLED Lens cover Original glassAutomatic original detection sensor APS sensor A4 series Protrusion704L LT seriesLens unit Rear side Carriage-1Remove 2 seals and release the cable With the position as shown in the figure After the installation, move carriage-1Fix it with a seal Align the bent portion of the lampRear sides Remove the carriage wires on both front Carriage wire / Carriage-2Mirror-1 INV boardPlaten sensor / Carriage home position sensor Mirrors-2SLG board 24 2003 2008 Toshiba TEC Corporation All rights reserved Followings are the boards used for image processing Image ProcessingSignal amplifi Configuration SLG Board FeaturesFunctions of image processing circuit After correction Example Reduction Example Enlargement 2003 2008 Toshiba TEC Corporation All rights reserved LGC Board ON/OFF control of the semiconductive laser APC Auto Power ControlLaser Driving PC Board LDR board Laser Optical Unit Drve PC board Structure Laser beam Drum Devaton Laser Optical Unit Laser Diode Light emission is started when the forward curRent reaches or becomes larger than the threshold Current and outputs the monitor current which isDrive circuit of the polygonal motor Laser Optical Unit Cooling FanPolygonal Motor Laser optical unit LRL PC board Laser unit fan 20,2 FunctionsFeeding system Paper Feeding System Paper Feeding System Operation of drawer pickup roller OperationOperation of bypass pickup roller Feed roller Separation of paperBypass feeding General operation From power-ON to ready statusReady status Paper feeding IN1 IN2 Drive Circuit of Tray-up MotorScrew Bypass unit A-1 Bypass unitRemove 2 screws and take off the right rear hinge cover Open the side cover Hinge assemblyHinge assembly Pull out the hinge assembly from the bypass traySFB board Plate Bracket SpringSolenoid arm Bypass pickup solenoidSolenoid Bypass pickup roller Bypass paper sensorBypass transport roller Bypass feed rollerDrive unit Bypass feed clutchBypass separation roller Sensor plate Bypass feed sensorLower drawer feed sensor Disconnect 3 connectorsDisconnect the connector on the front side Jam access cover Connector Lead wireTerminal CoverFeed sensor Upper drawerSetscrew Registration rollerDrive gear unit Screw Ring Bushing Registration Roller Tray drive unit/Tray-up motor Paper Feeding System Upper transport clutch Transport clutch upper/lowerLower transport ClutchAttach the clutches to the shafts as shown on the right Drawer detection switch upper/lowerDrawer feeding unit upper/lower H-1 Drawer feeding unit Tray-up sensorSeparation roller Paper stock sensorDrawer feed clutch Feed rollerPickup roller 0.5mm Drive System 10.3.1Main motor drive Main MotorSignal names are for the connector CN318 LGC board 10.3.2Control signalsGear unit Main motorRegistration clutch Developer drive clutch Drive System Drum Related Section 11 2003 2008 Toshiba TEC Corporation All rights reserved Detection standard line Drum Related Section Description of operations Output Control Circuits of High-Voltage TransformerOverview CN30-B7 Hvdvr Drum temperature detection circuit Drum Temperature Detection Circuit11.5.2Construction Temperature/Humidity Sensor11.5.1General description Main charger grid Cleaner unitMain charger B-1 Main charger Charger wire cleaning pad Main charger wireDrum Seal Cleaner Cleaning bladeCleaning blade Separation finger Recovery bladeExhaust fan / Sub-separation fan Charger wireDischarge LED Developer unit cooling fan I-1 Developer unit cooling fan-2 Toner bag full detection sensor-2Developer unit cooling fan unit-1 Developer unit cooling fan-1Middle fan Temperature / Humidity sensor 11 20 2003 2008 Toshiba TEC Corporation All rights reserved Sectional view of developer unit Development SystemFunctions Drive Circuit of Toner Motor STUDIO352/353/452/453 STUDIO350/450 Auto-Toner CircuitFunction of auto-toner sensor Drve ndng Adjustment using the drum thermistor Adjustment using the temperature / humidity sensorDeveloper material Discharge of developer material Developer unitGuide roller Front side Guide roller Rear sideRemove 1 E-ring and 4 gears Take off the guide roller Drum thermistor Auto-toner sensorDeveloper sleeve Replacement of Oil SealReplace the oil seal on the shaft on the de Veloper sleeve rear side, if necessaryMixer-2 Mixer-1Oil seal BushingToner cartridge drive unit I-1 Toner cartridge drive unit Toner motor Toner cartridge detection switchRice grains on entire surface of the oil seal Evenly Wipe off the excessive grease12 16 2003 2008 Toshiba TEC Corporation All rights reserved Fuser Unit / Paper Exit Section 13 2003 2008 Toshiba TEC Corporation All rights reserved Fuser Unit / Paper Exit Section 13.4 ConfigurationCircuit 13.4.113.4.2Heating principle of IH Heater Image of current flowng from a to BIH2 on IH control circuit interfaceVDD IH1 onFAX Control of the surface temperature of the fuser belt 13.4.5Temperature detection sectionEnergy Saver Reference CPU Checking timing Condition Temperature judged Error H1ERR1 CPU PA2 H1ERR2 PA3 13.4.6Abnormality in the IH control circuitIH error Exit Motor Drive Control Circuit of Exit MotorHarness clamp Fuser unit cooling fanExit finger Exit sensorSeparation finger for pressure roller Cleaning rollerSeparation finger for fuser roller Stepped screwFuser Unit / Paper Exit Section IH coil Pressure rollerFuser roller Thermistor Take off the IH terminal cover Chapters 2.5.1 L ThermostatIH control PC board IH board IH board cooling fan IH board unitMetal bushing Exit motorExit roller Take off the lower exit roller Automatic Duplexing Unit ADU Description of Operations 2003 2008 Toshiba TEC Corporation All rights reserved Automatic Duplexing Unit 2 2003 2008 Toshiba TEC Corporation All rights reserved PmentEqu Timing chart for duplex copying from upperEqupment Drive of ADU Yes Yes Screw Right rear hinge cover Right front hinge coverSnap pin ADU inside rear coverTape ADU insidePaper guide ADU opening / closing switchADU cover Rear latchOpening /Closing lever Remove the screw and release the rear latchADU entrance sensor, ADU exit sensor Rear latchADU motor ADU driving PC board ADU boardADU gear unit MotorADU clutch ADU clutchUpper transport roller Remove 2 bushings and take off the upper Remove the clip on the front sidePin BeltMiddle transport roller Lower transport roller 14 20 2003 2008 Toshiba TEC Corporation All rights reserved Operation of DC Output Circuits Power Supply UnitOutput Channel Power Supply Unit LGC FusePFP/LCF SLGSTUDIO350/352/353/450/452/453 Power Supply Unit Configuration of Power Supply UnitPWR-EN Sequence of Power SupplyPWR-DN 2003 2008 Toshiba TEC Corporation All AC Wire HarnessPower Supply Unit PWA-F-SYS e-STUDIO350/450 PC BoardsSTUDIO352/353/452/453 PWA-F-LGC e-STUDIO350/450 STUDIO352/353/452/453 PWA-F-SLG e-STUDIO350/450 STUDIO352/353/452/453 PWA-F-CCD PWA-F-DSP e-STUDIO350/450 STUDIO352/353/452/453 PWA-F-ADU2003 2008 Toshiba TEC Corporation All rights reserved PWA-F-FUS ASD/AUD/CND models Standard, MJD model Option