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Toshiba 350, 452, 453, 353 service manual SLG Board, Features

Models: 350 353 453 452

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7.3 SLG Board

7.3.1 Features

(1)The image processing section on the SLG board is controlled by the CPU on the SLG board.

(2)The image processing section on the SLG board realizes the following when functioning the equipment:

•High quality image processing

•Image memory editing

•Editing processing

•Gamma correction

•Gradation processing

•External output system interface

e-STUDIO350/352/353/450/452/4537 - © 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved

IMAGE PROCESSING	05/11

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Toshiba 350, 452, 453, 353 service manual SLG Board, Features

Contents

STUDIO350/450 e-STUDIO352/452 e-STUDIO353/453 Trademarks Transportation / Installation Service of MachinesMain Service Parts for Safety Contents Scanner 11-1 12-5 12.412-4 12-7Specifications Set 55.47 54.68 Sets 126.21 118.07 System copy speed Copy mode SecApprox seconds temperature 20C Sets 196.93 181.36Sheets 64 to 80 g/m2 17 to 22 lb Automatic duplexing unit Stackless, Switchback typeLCF-Option Stack height 137.5 mm x 2 equivalent to 80 g/m2 17 to 22 lbSpecifications Accessories Options STUDIO350/450STUDIO352/353/452/453 2nd line for fax board07/11 Supplies System List RadfSTAPLE-2000 12 2003 2008 Toshiba TEC Corporation All rights reserved Outline of the Machine Sectional View04/05 0 22 24 25 2 27 2 2003 2008 Toshiba TEC Corporation All rights reserved Electric Parts Layout Unit constructionScanner unit Motor, sensor, lamp A4 seriesLT series PC board, heater, thermostat, other part ASD/AUD/CND/SAD/TWD models Standard NAD/MJD models OptionControl panel unit Process unit Motor, sensor, switch, PC board Motor, sensor, lamp, heater, thermistor, thermostatLaser unit Paper feeder unitTransport unit Bypass unitAutomatic duplexing unit Fuser unitDrive unit CLT5 CLT6 CLT7 CLT8 HVTPC board unit STUDIO350/450STUDIO352/353/452/453 Symbols and Functions of Various Components Sensors and switches SFB-SNR CST-U-SWCST-L-SW SFB-FED-SNRElectromagnetic clutches SolenoidsPC boards Lamps and heaters Thermistors and thermostatsTransformer OthersSystem block diagram General Description2003 2008 Toshiba TEC Construction of boards Construction diagram of boards Function of each boardOutline of the Machine HVT Front left cover Installation and Replacement Covers and PC boardsExternal covers Front cover Open the front cover Remove 1 screw and front left coverRear cover STUDIO350/450 Remove 7 screws and take off the rear coverRight upper cover Left upper coverFront upper cover Upper rear coverTray back cover Receiving trayRemove 2 screws and take off the receiving tray Left coverRight front hinge cover Left rear coverIH terminal cover STUDIO350/352/353/450/452/453Right lower cover Right rear coverFront right cover PC boards Logic PC board LGC board A-1 LGC boardLGC board unit Hard disk / HDD cooling fan Remove 4 screws and take off the hard disk SYS board coverHDD cooling fan System control PC board case SYS board case STUDIO350/450Hard disk 05/1107/11 NIC board / System control PC board SYS board STUDIO350/450 Remove 10 screws, take off the SYS boardNIC board Switching power supply SYS boardPower supply cooling fan High-voltage transformerNoise filter MR-3015 Reversing Automatic Document Feeder Radf Turn OFF the power and unplug the power Cable KD-1011 Paper Feed Pedestal PFPKD-1012 Large Capacity Feeder LCF 44 2003 2008 Toshiba TEC Corporation All rights reserved MJ-1022 Hanging finisher D-1 When PFP/LCF is not installed Lift up the equipment and take off the LCFWhen PFP/LCF is installed Remove 2 screws Lift up the finisher and take it offMJ-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 Lift up the punch unit and take it off KN-3520 Bridge unitMJ-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-1101 Console finisher MJ-6101Hole punch unit60 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 Copy Process General Description of Copying ProcessDetails of Copying Process ExampleImage processing sec Tion Example CCD light Value of image Magnet Magnetic roller Toner 30-100 µm Additional Explanation Charger Separation charger during printing. As the result Paper may not be separated from the drum surfaceBecause of moisture or malfunction of the transfer Used to forcibly separate the paper which was leftRecovery blade Cleaning blade Drum rotation Comparison with DP4500/3500 Copying operation Bypass feed copying Interrupt copying Overview of OperationDescription of Operation Warming-upReady state ready for copying Drawer feed copying Upper drawer paper feedingGeneral Operation Page Bypass feed copying Interruption copyingPress the Interrupt button Detection of Abnormality Types of abnormalityDescription of abnormality General Operation Paper jam E010 → The copying operation is stopped. Timer Paper jam E010Paper jam E020 General Operation Flow Chart Immediately after the power is turned onYES Automatic paper feed copying Paper jam E00Ready 16 2003 2008 Toshiba TEC Corporation All rights reserved Control Panel Control Panel and Display PanelItems Shown on the Display Panel Display Change Drawer To Correct Paper Size Saddle StitchTray Full Ready CopyingCheck Paper Large Capacity Feeder Cannot PunchThis Size Paper Department CounterTo Correct Media Type Press Basic According to the messages displayed Radf Dot matrix LCD circuit StructureSystem control PC board Control panel Data Transmission LED display circuitMethod of LED display ex Displaying Copy Disassembly and Replacement DSP board Hinge bracketRemove 16 screws and take off the KEY board KEY boardScanner FunctionConstruction Mirror-2 Mirror-3 Scan motor Scanning drive circuit Moten MotclkMotdir MotrefInitialization at power-ON Control of Exposure Lamp General descriptionExposure lamp Control circuit for the exposure lamp SLG boardWorking conditions General Description of CCD Control Opto-electronic conversionShading correction Process of detection of original size Automatic Original Size Detection CircuitPrinciple of original size detection A4 Series LT SeriesStlt When the platen sensor is OFF APS-C APS-RLED Automatic original detection sensor APS sensor A4 series Original glassLens cover ProtrusionLT series 704LLens unit Carriage-1 Remove 2 seals and release the cableRear side Fix it with a seal After the installation, move carriage-1With the position as shown in the figure Align the bent portion of the lampMirror-1 Carriage wire / Carriage-2Rear sides Remove the carriage wires on both front INV boardMirrors-2 Platen sensor / Carriage home position sensorSLG board 24 2003 2008 Toshiba TEC Corporation All rights reserved Image Processing Followings are the boards used for image processingSignal amplifi Configuration Features SLG BoardFunctions of image processing circuit After correction Example Enlargement Example Reduction 2003 2008 Toshiba TEC Corporation All rights reserved LGC Board APC Auto Power Control Laser Driving PC Board LDR boardON/OFF control of the semiconductive laser Laser Optical Unit Drve PC board Structure Laser beam Drum Devaton Laser Optical Unit Rent reaches or becomes larger than the threshold Light emission is started when the forward curLaser Diode Current and outputs the monitor current which isLaser Optical Unit Cooling Fan Polygonal MotorDrive circuit of the polygonal motor Laser optical unit Laser unit fan LRL PC boardFunctions 20,2 Feeding system Paper Feeding System Paper Feeding System Operation Operation of bypass pickup rollerOperation of drawer pickup roller Separation of paper Feed rollerGeneral operation From power-ON to ready status Ready statusBypass feeding Paper feeding Drive Circuit of Tray-up Motor IN1 IN2Bypass unit A-1 Bypass unit Remove 2 screws and take off the right rear hinge coverScrew Hinge assembly Open the side coverSFB board Pull out the hinge assembly from the bypass trayHinge assembly Plate Bracket SpringBypass pickup solenoid SolenoidSolenoid arm Bypass paper sensor Bypass pickup rollerBypass feed roller Bypass transport rollerBypass feed clutch Bypass separation rollerDrive unit Bypass feed sensor Sensor plateDisconnect 3 connectors Disconnect the connector on the front sideLower drawer feed sensor Jam access cover Terminal Lead wireConnector CoverUpper drawer Feed sensorRegistration roller SetscrewDrive gear unit Screw Ring Bushing Registration Roller Tray drive unit/Tray-up motor Paper Feeding System Lower transport Transport clutch upper/lowerUpper transport clutch ClutchDrawer feeding unit upper/lower H-1 Drawer feeding unit Drawer detection switch upper/lowerAttach the clutches to the shafts as shown on the right Tray-up sensorPaper stock sensor Separation rollerFeed roller Pickup rollerDrawer feed clutch 0.5mm Drive System Main Motor 10.3.1Main motor drive10.3.2Control signals Signal names are for the connector CN318 LGC boardMain motor Registration clutchGear unit Developer drive clutch Drive System Drum Related Section 11 2003 2008 Toshiba TEC Corporation All rights reserved Detection standard line Drum Related Section Output Control Circuits of High-Voltage Transformer OverviewDescription of operations CN30-B7 Hvdvr Drum Temperature Detection Circuit Drum temperature detection circuitTemperature/Humidity Sensor 11.5.1General description11.5.2Construction Cleaner unit Main charger B-1 Main chargerMain charger grid Main charger wire Charger wire cleaning padDrum Cleaner Cleaning blade Cleaning bladeSeal Recovery blade Separation fingerCharger wire Exhaust fan / Sub-separation fanDischarge LED Toner bag full detection sensor-2 Developer unit cooling fan I-1 Developer unit cooling fan-2Developer unit cooling fan-1 Developer unit cooling fan unit-1Middle fan Temperature / Humidity sensor 11 20 2003 2008 Toshiba TEC Corporation All rights reserved Development System Sectional view of developer unitFunctions Drive Circuit of Toner Motor Auto-Toner Circuit STUDIO352/353/452/453 STUDIO350/450Function of auto-toner sensor Drve ndng Adjustment using the temperature / humidity sensor Adjustment using the drum thermistorDeveloper unit Developer material Discharge of developer materialGuide roller Front side Rear side Remove 1 E-ring and 4 gears Take off the guide rollerGuide roller Auto-toner sensor Drum thermistorReplace the oil seal on the shaft on the de Replacement of Oil SealDeveloper sleeve Veloper sleeve rear side, if necessaryOil seal Mixer-1Mixer-2 BushingToner cartridge drive unit I-1 Toner cartridge drive unit Rice grains on entire surface of the oil seal Evenly Toner cartridge detection switchToner motor 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 Circuit Configuration13.4 13.4.1Image of current flowng from a to B 13.4.2Heating principle of IH HeaterVDD IH control circuit interfaceIH2 on IH1 onFAX 13.4.5Temperature detection section Control of the surface temperature of the fuser beltEnergy Saver Reference CPU Checking timing Condition Temperature judged Error 13.4.6Abnormality in the IH control circuit H1ERR1 CPU PA2 H1ERR2 PA3IH error Control Circuit of Exit Motor Exit Motor DriveFuser unit cooling fan Harness clampExit sensor Exit fingerSeparation finger for fuser roller Cleaning rollerSeparation finger for pressure roller Stepped screwFuser Unit / Paper Exit Section Pressure roller IH coilFuser roller Thermistor Thermostat IH control PC board IH boardTake off the IH terminal cover Chapters 2.5.1 L IH board unit IH board cooling fanExit motor Exit rollerMetal bushing 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 Timing chart for duplex copying from upper PmentEquEqupment Drive of ADU Yes Yes Right front hinge cover Screw Right rear hinge coverTape ADU inside rear coverSnap pin ADU insideADU cover ADU opening / closing switchPaper guide Rear latchADU entrance sensor, ADU exit sensor Remove the screw and release the rear latchOpening /Closing lever Rear latchADU gear unit ADU driving PC board ADU boardADU motor MotorADU clutch Upper transport rollerADU clutch Pin Remove the clip on the front sideRemove 2 bushings and take off the upper BeltMiddle transport roller Lower transport roller 14 20 2003 2008 Toshiba TEC Corporation All rights reserved Power Supply Unit Operation of DC Output CircuitsOutput Channel Power Supply Unit PFP/LCF FuseLGC SLGConfiguration of Power Supply Unit STUDIO350/352/353/450/452/453 Power Supply UnitSequence of Power Supply PWR-DNPWR-EN AC Wire Harness 2003 2008 Toshiba TEC Corporation AllPower Supply Unit PC Boards PWA-F-SYS e-STUDIO350/450STUDIO352/353/452/453 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-ADU PWA-F-DSP e-STUDIO350/450 STUDIO352/353/452/4532003 2008 Toshiba TEC Corporation All rights reserved PWA-F-FUS ASD/AUD/CND models Standard, MJD model Option