Minolta EP6000 Spécifications

EP6000GENERAL,MECHANICAL/ELECTRICAL

MediumDimensionsCOPY MEDIUM:Paper Source 1st to 2nd Drawer 3rd DrawerMulti BypassTablePlain paper (60 to 90 g/m2)OOOTranslucent paper — —Transparencie

13-8. Sub Hopper Toner Empty Detecting Mechanism/Control<Toner Empty Detecting Mechanism>•A toner-empty condition in the Sub Hopper is detected

<Toner Empty Detecting Control>= Detection Control =•A toner-empty condition of the Sub Hopper is detected by the outputfrom Sub Hopper Toner Em

= Control After Detection of Toner-Empty Condition =Open the Upper Front Door, change the Toner Bottle, and close the UpperFront Door.Main Hopper Tone

13-9. Main Hopper Toner Replenishing Mechanism/ControlWhen a toner-empty condition is detected in the Sub Hopper, Main HopperToner Replenishing Motor

= Coupling Locking Mechanism =The coupling is locked in position to prevent it from moving when the TonerBottle is removed or installed. When the Tone

<Main Hopper Toner Replenishing Motor M14 Control>•Main Hopper Toner Replenishing Motor M14 is energized anddeenergized by the output from pin 6

13-10. Auxiliary Toner Replenishing (User Mode Function)•The copier is set into the Auxiliary Toner Replenishing mode when the UserMode Key on the con

= Timing Chart =<If Readings are Lower Than the T/C Control Level>PC Drum DriveMotor (M5)ATDC DetectionON : Developer Mixing1075T110CA2 sec.975

13-11. Developing Bias•A negative voltage (VB = developing bias voltage) is applied to the 1st and2nd Sleeve/Magnet Rollers to prevent a foggy backgro

13-12. Developing Unit Dehumidifying Heater•Variations in the environmental conditions (temperature and humidity)surrounding the copier could result i

MULTIPLE COPIES : 1 to 999 copies (count-down system)ZOOM RATIOSMetric InchFixedFull Size ×1.000 ×1.000Reduction×0.816×0.707×0.500×0.785×0.733×0.647×0

13-13. Toner Suction Fan Motor•This copier is provided with a Suction Duct under the 2nd Sleeve/MagnetRoller. Toner particles from the Developing Unit

14-1. Pre-Image Transfer Erase Lamp•This copier is equipped with Pre-Image Transfer Erase Lamp LA4 whoselight strikes the surface of the PC Drum after

1075C13MAA M-94

15 PAPER TAKE-UP/FEED SECTION1234567891012111314151617181920212223242325262928273837353433303231361. Synchronizing Roller2. Paper Leading Edge Sensor

15-2. Drawer-in-Position Detection•When the 1st/2nd Drawer is slid into the copier, the light blocking plate inthe rear of the drawer blocks 1st/2nd D

PC22/23 (blocked)Paper PresentThe paper stack raises the PaperEmpty Lever which blocks ( L )PC22/23.PC22/23 (unblocked)Paper Not PresentThe Paper Em

1075C55MCA M-98

15-4. Paper Lifting/Lowering Mechanism/Control(1) Metric Areas•When the drawer is slid into the copier, the flat spring at the rear of thedrawer raise

Paper is consumed as copies aremade.As the Paper Take-Up Roll lowers,1st/2nd Drawer Lift-Up SensorPC14/15 is unblocked ( H ).1st/2nd Drawer Lift-Up

(2) Inch Areas•When the drawer is slid into the copier and, if 1st/2nd Drawer Paper EmptySensor PC22/23 and 1st/2nd Drawer Paper Empty Board PWB-E1/E2

DIMENSIONS : Copier only Width ... 746 mm or 29-1/4" Depth ... 720 mm or 28-1/4" Height ... 969 mm or 38-1/4" WEIGHT : 195 kg or 430

Paper is consumed as copies aremade.As the Paper Take-Up Roll lowers,1st/2nd Drawer Lift-Up SensorPC14/15 is unblocked ( H ).M23/24 is energized to

15-5. Paper Stack Lowering/Drawer Locking Mechanism/Control (InchAreas)•When the Paper Descent Key (UN10/11) is pressed or the drawer runs outof paper

1075C58MCA M-104

15-6. Paper Level Detection•The amount of paper still available for use, or the paper level, of the 1stand 2nd Drawer is detected by 1st/2nd Drawer Li

1075C59MCA M-106

15-7. 3rd-Drawer-in-Position Detection•When the 3rd Drawer is slid into the copier, the light blocking plate in therear of the drawer blocks 3rd Drawe

15-8. 3rd Drawer Paper Empty Detection Main Tray •A paper-empty condition of the Main Tray is detected by 3rd Drawer MainTray Paper Empty Board PWB-E

1075C40MAA M-109

15-9. Main Tray Paper Stack Lifting/Lowering Mechanism/Control◆ Main Tray Paper Stack Lifting/Lowering Mechanism•The Main Tray is raised and lowered

◆ Main Tray Up/Down Motion Conditions•The Main Tray is Raised When:(1) The 3rd Drawer is slid into the copier with its Main Tray loaded withpaper. (Fo

4SPACE REQUIREMENTSTo ensure easy copier operation, supply replacement, and servicemaintenance, adhere to the recommended space requirements detailedb

•The Main Tray is Lowered When:(1) 3rd Drawer Paper Empty Sensor PC24 is unblocked ( H ) during apaper take-up sequence.(2) 3rd Drawer Paper Descent

1075C41MAA M-113

15-10. 3rd Drawer Paper Level Detecting Mechanism•The amount of paper still available for use, or the paper level, of the MainTray is detected using 3

15-11. Shifter Drive Mechanism/Control•The Shifter is driven by 3rd Drawer Shift Motor M28 via a belt. As M28 isenergized, the Shifter transfers the p

◆ 3rd Drawer Shift Motor M28 Control•M28, a DC motor, is energized to turn forward or backward anddeenergized by the M28 Control signals fed from Mast

◆Timing Chart1075T113CA0.5 sec.0.5 sec.0.5 sec.HLONOFFHLHLHL3rd Drawer Paper EmptySensor (PC24)3rd Drawer Tray LowerPosition Sensor (PC46)3rd Drawer E

15-12. 3rd Drawer Lock/ReleaseLock•When the 3rd Drawer is slid into the copier, the locking pawl in the rear ofthe copier is hooked onto the locking s

15-13. Paper Dehumidifying Heaters (Except Europe, U.S.A., andCanada)•When the paper in the drawer grows damp, its electrical resistancedecreases, whi

15-14. Drawer Paper Take-Up Mechanism/Control<Paper Take-Up Mechanism>•Drive for the paper take-up sequence is transmitted from Paper Take-UpMot

<Paper Separating Mechanism>•The paper separating mechanism employs a torque limiter to ensure thatonly the top sheet of paper is fed in by sepa

5PRECAUTIONS FOR INSTALLATION Installation SiteTo ensure safety and utmost performance of the copier, the copier shouldNOT be used in a place:●Where i

<Paper Pressure Release Mechanism> (Except 3rd Drawer)•If the drawer is pulled out when a sheet of paper is pinched between theFeed and Separato

<Paper Take-Up Motor M1 Control>•Paper Take-Up Motor M1 is a DC motor and controlled by the M1 Remotesignal output from pin 48 of IC5A on Master

<Paper Take-Up Retry Control>•To minimize the occurrence of paper misfeed due to a slippery PaperTake-Up Roll, the Paper Take-Up Clutch (CL1/2/3

<Double Feed Control>•Even if the Paper Take-Up Roll takes up two sheets of paper at one time,the double feed control uses the second sheet of p

15-15. Vertical Transport Drive Mechanism•Each Vertical Transport Roller is driven by Vertical Transport Motor M2.Vertical Transport RollersM2 M-126

◆ Vertical Transport Drive Control•Vertical Transport Motor M2, a stepping motor, is controlled by the M2Control signals fed from Master Board PWB-A a

15-16. Multi Bypass Table(1) Construction•The Multi Bypass Table consisting of the following parts is fitted to theRight Door of the copier. 1. Manual

(2) Manual Bypass Paper Take-Up Drive Mechanism•Drive for paper take-up from the Multi Bypass Table is transmitted fromTransport Motor M3 via Manual F

The Manual BypassTake-Up Roll is pressedagainst the paper stack.The lock levers are movedin the direction of arrow A.The Paper Stoppers are free.SL9 i

(4) Manual Bypass Paper Separating Mechanism•The paper separating mechanism employs a torque limiter to ensure thatonly the top sheet of paper is fed

6PRECAUTIONS FOR USETo ensure that the copier is used in an optimum condition, observe thefollowing precautions.●Never place a heavy object on the cop

(5) Manual Bypass Paper Empty Detection•The Multi Bypass Table is equipped with Manual Feed Paper EmptySensor PC28 which detects a sheet of paper on t

(6) Manual Bypass Paper Width Detection•In this copier, the original is aligned with the rear edge, while the paper isfed though the center of the cop

•The VR1 output voltages are input to pin 75 of IC1A on Master BoardPWB-A and the copier knows the paper width by the particular voltage.Paper Width A

(7) Manual Bypass Take-Up Control•Manual Feed Paper Pick-Up Solenoid SL9, which presses the ManualBypass Take-Up Roll against and releases it from the

16 TRANSPORT/SYNCHRONIZING ROLLERS UNIT16-1. Construction•The Transport/Synchronizing Rollers Unit can be removed as an assemblyfor easy serviceabilit

16-2. Paper Dust Remover•The Upper Transport Roller and Upper Synchronizing Roller are eachequipped with a Paper Dust Remover to prevent paper dust fr

16-4. Transport Roller Drive Control•The Transport Rollers are driven by Transport Motor M3.•M3, a stepping motor, is controlled by energizing the fou

16-5. Synchronizing Roller Drive Mechanism•The Upper Synchronizing Roller is driven by the Lower SynchronizingRoller.•The Lower Synchronizing Roller i

16-6. Synchronizing Roller Drive Control•The Synchronizing Rollers are driven by Synchronizing Motor M4.•M4, a stepping motor, is controlled by energi

1075C33MAA M-141

7HANDLING OF THE CONSUMABLESBefore using any consumables, always read the label on its containercarefully.●Use the right toner. The applicable copier

16-7. Prevention of Low Image Density on CopyDuring conditions of high humidity when the paper is damp, charges wouldtend to flow from the Image Trans

17IMAGE TRANSFER/PAPER SEPARATOR CORONAS17-1. Image Transfer/Paper Separator Coronas•The Image Transfer Corona, employing the corotron system, applies

17-2. Image Transfer/Paper Separator Coronas ControlTurning ON and OFF the Image Transfer/Paper Separator Coronas iscontrolled by the signal output fr

17-3. Image Transfer/Paper Separator Corona Wires CleaningMechanism/ControlThe Image Transfer/Paper Separator Coronas are provided with amechanism tha

<Control>•The Image Transfer/Paper Separator corona wires are automaticallycleaned under the following conditions. The cleaning function is, how

1075C15MAA M-147

17-4. Image Transfer/Paper Separator Coronas Assy RetractingMechanism•The Image Transfer/Paper Separator Coronas Assy Holder is designed toretract dow

17-5. Ozone Filter•Ozone produced by the Image Transfer/Paper Separator Coronas isabsorbed by the Ozone Filter from the air being drawn out of the cop

18 CLEANING UNIT18-1. Construction of the Cleaning Unit•The Cleaning Blade is pressed tightly against the surface of the PC Drumand scrapes off any to

18-2. Cleaning Blade Moving Mechanism•The Cleaning Blade is moved to the front and rear while the PC Drum isturning to ensure that all residual toner

8SYSTEM OPTIONS 1. Plug-In Counter 2. Data Controller D-102 3. Original Cover 4. Duplexing Document Feeder AFR-9 <Standard> 5. Large Capacity Ca

18-3. Toner Conveying/Collecting Mechanism•The toner which has been scraped off the surface of the PC Drum by theCleaning Blade is conveyed to the rea

<Pipe Shutter Mechanism> •There is a mechanism called the Pipe Shutter that prevents spent tonerfrom spilling, provided at the Chute Port.•The T

18-4. Pre-Cleaning Erase Lamp LA5 ON/OFF Control•Pre-Cleaning Erase Lamp LA5 is made up of 64 LEDs.•The ON/OFF timing of LA5 is in synchronism with th

18-5. PC Drum Paper Separator Fingers Moving Mechanism/Control<Mechanism>•The PC Drum Paper Separator Fingers function, together with the PaperS

= Finger Pressing Motion =•The PC Drum Paper Separator Fingers are pressed against the surfaceof the PC Drum by Separator Finger Solenoid SL6 as it is

= Finger Back-and-Forth Motion =•The PC Drum Paper Separator Fingers are moved in the crosswisedirection by the eccentric cam with ratchet when Separa

<Control>Separator Finger Solenoid SL6 is energized and deenergized by the signaloutput from pin 88 of IC4A on Master Board PWB-A.<SL6 Energi

18-6. Cleaning Bias (Option)•A Cleaning Bias Seal can be installed optionally.•It is installed according to the type of copy paper the user uses.•It m

19 MAIN ERASE LAMP19-1. Main Erase Lamp•Main Erase Lamp LA2 neutralizes any surface potential remaining on thesurface of the PC Drum after cleaning.•I

1075C19MAA M-161

9PARTS IDENTIFICATIONRight Door LockRelease LeverUpper Front Door1st DrawerLower Front DoorManual Bypass TableControl PanelPower Switch2nd DrawerTotal

20-1. Transport Section•Rotation of Suction Fan Motor M18 results in the paper separated from thePC Drum being drawn onto the turning Suction Belts. A

20-2. Suction Fan Motor M18 ControlSuction Fan Motor M18 turns at either half or full speed, selected by thesignal output from pin 49 of IC5A on Maste

21 FUSING UNIT•The Fusing Unit functions to fix permanently the developed image to thepaper by applying heat to the toner and paper. A given pressure

Part Name Symbol Function1 Web Take-Up RollerTakes up the Cleaning Web being suppliedfrom the Web Roller.2Oil Supply/WebFeeding RollerPresses the Clea

21-2. Fusing Rollers and Web Roller<Upper Fusing Roller>•A teflon-coated roller is used, which makes for improved fusingperformance and a reduce

21-3. Drive for the Fusing Unit•The Fusing Unit is driven by Fusing Motor M6 fitted to the Fusing Drive Unitin the rear of the copier. (M6 is fitted t

◆ Fusing Motor M6 Control•M6 is energized at the same time when the Start Key is pressed anddeenergized approx. 600 msec. after the trailing edge of

21-4. Fusing Rollers Pressure Mechanism•To ensure that there is a certain width of area of contact between theUpper and Lower Fusing Rollers, a pressu

21-6. Cleaning Web Take-Up Mechanism/Control•The Cleaning Web wound around the Web Roller is taken up by the WebTake-Up Roller which is driven by Clea

◆ Cleaning Web Drive Motor M16 Control•Cleaning Web Drive Motor M16 is energized by a LOW M16 Remote signaloutput from pin 2 of PJ4A on Master Board

1CROSS-SECTIONAL VIEW56 7811821221710 11 12 13141920923 4 16152325242627343536374038 39 43424131323328293044ABGJEFHICD4945474648NLMK1075M096AA M-1

21-7. Fusing Temperature Control•The Fusing Unit is provided with three heater lamps, each turning ON toprovide fusing temperature control at a partic

<Temperature Control>•Upper Fusing Roller Thermistor TH1 and Lower Fusing Roller ThermistorTH2 detect the surface temperatures of the correspond

1075C21MAA M-174

<Predrive Control>•Predrive is controlled in three different ways depending on the surfacetemperatures of the Upper and Lower Fusing Rollers. Th

21-8. CPM Control•The CPM (copies/minute) control is provided to keep good fusingperformance even in multi-copy cycles and with the system power sourc

◆ Multi-Copy Cycle Immediately After Warm-up in Early Morning(normal CPM: 60)1075M157CC190140(Time)1800Multi-Copy CycleCPM Control(45 copies/min.)

22-1. Construction•The Exit/Duplex Switching Unit functions to switch the paper path to feedthe copy:➀ Out onto the Exit Tray; or,➁ Down into the Dupl

22-2. Exit/Duplex Switching Mechanism/Control<Overview>•Exit/Duplex Switching Solenoid SL1 is energized or deenergized tooperate the Exit/Duplex

<Control>•SL1 is energized and deenergized by the signal output from pin 1 ofPJ6A on Master Board PWB-A.•The Exit/Duplex Switching Plate is oper

•The turnover mechanism of the Duplex Unit reverses the copy fed from theExit/Duplex Switching Unit and feeds it into the Duplex Unit, the trailingedg

GENERAL1. SAFETY INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . G-12. TECHNICAL HIGHLIGHTS . . . . . . . . . . . . . .

1. Optical Section Cooling FanMotor M17 2. 3rd Mirror 3. 2nd Mirror 4. 1st Mirror 5. Exposure Lamp LA1 6. Fusing Unit Ventilation FanMotor M8

23-2. Drive Mechanism•Duplex Unit Drive Motor M7 gives drive to each roller of the turnovermechanism.Turnover Feed Sensor PC37Gear on Duplex UnitDuple

23-3. Duplex Unit Turnover Mechanism•The paper is turned over as follows.1) The paper from the Fusing Unit isdirected down toward the turnovermechanis

4) When the trailing edge of the papermoves past the tip of the TurnoverRoll C Release Lever, the releaselever returns to its original position.The pa

<Control>•SL11 is energized 300 msec. after Turnover Feed Sensor PC37 hasgone from LOW to HIGH as the trailing edge of the paper moves past it.T

•The size of the paper that can be stored in the Duplex Unit is as follows.Metric areas ... A5 lengthwise (148 mm × 210 mm) to A3 lengthwise (297mm ×

Part Name Symbol Function1Upper Guide PlateAssyServes as a top guide for the paper being fedinto the Duplex Unit.2Duplex Unit GateSwitching SolenoidSL

24-2. Trailing Gate Unit Moving Mechanism/Control•The Trailing Gate Unit is moved as necessary to store paper of differentsizes.The unit is moved as d

24-3. Gate Switching Mechanism/Control•When paper is to be stored into the Duplex Unit, the Gate Switching Leveris operated as necessary according to

24-4. Trailing Gate Unit Moving and Gate Switching Operations◆Timing Chart (A3L, 2 sheets)1075T125CAONOFFDuplex Unit DriveMotor (M7)Duplex Unit GateMo

24-5. Front/Rear Edge Guide Plate Drive Mechanism/Control•The Front and Rear Edge Guide Plates of the Duplex Unit align the frontand rear edges of the

3. EXPOSURE 2. DRUMCHARGING4. IMAGE ERASE6. PRE-IMAGE TRANSFER ERASE5. DEVELOPING 14. FUSING10. PRE-CLEANING ERASE 7. MULTI BYPASSTABLE 7. PAPER FEEDI

◆Operation of the Front/Rear Edge Guide Plates (for A4 lengthwisepaper)<In standby, at home position>•The Front/Rear Edge Guide Plates are locat

24-6. Storing of Copies in Duplex Unit•The 1-sided copy is stored into the Copy Storage of the Duplex Unit asdetailed below during the 2-sided copy mo

1075C31MAA M-194

24-7. Leading Edge Guide Plate and Duplex Paper Take-Up DriveMechanism/Control•Copies stored in the Duplex Unit are taken up and fed back into the cop

◆Duplex Vertical Transport Rollers Drive•The paper taken up from the Duplex Unit is fed by the Duplex VerticalTransport Rollers onto the Transport Rol

24-8. Duplex Paper Take-Up Operation◆Normal mode (Making 2 2-sided copies on A4 crosswise paper from1-sided originals by using the Duplexing Document

◆Time Saver Mode•In the Time Saver mode, the copies stored in the Duplex Unit are taken upand fed back into the copier in a different order from when

<Operation in Time Saver Mode: A4 crosswise paper, 10 copies>The trailing edge of the 6th copy moves past Duplex Unit Paper EntrySensor PC38 (

1075C32MAA M-200

25POWER SUPPLYThe copier power is supplied as follows when the power cord is plugged inor Power Switch S1 is turned ON.1. When Power Cord is Plugged i

7. Paper FeedingPaper is fed from each drawer or Multi Bypass Table. (For more details, see p. M-95.)8. Image TransferThe single-wire Image Transfer C

DC Power Supply Board PWB-CPJ2C-1~4PJ4C-1~62. Power Switch S1 is Turned ON.Power Switch S1: ONDC Power Supply 1 PU2DC Power Supply Board PWB-CQ1C:ONRY

1075C29TAA M-203

26MEMORY BACKUPIC1 (RAM) of RAM Board PWB-R connected to Master Board PWB-A storesthe setting/adjustment values set in the Tech. Rep. modes as well as

MINOLTA CO., LTD.1075-7991-11 94103720Printed in JapanCopyright1994 MINOLTA CO., LTDPrinted in JapanUse of this manual shouldbe strictly supervised to

EP6000DIS/REASSEMBLY,ADJUSTMENT

1-1. PRECAUTIONS FOR DISASSEMBLY/ADJUSTMENTS . . . D-11-2. INSTRUCTIONS FOR HANDLING THE PWBs WITH MOS ICs . . . . . . . . . . . . . . . . . . . . .

(10) Removal of the Lens Drive Cable . . . . . . . . . . . . . . . . . . D-32(11) Winding of the Lens Drive Cable . . . . . . . . . . . . . . . . . .

2-7. DEVELOPING UNIT(1) Removal of the Sub Hopper. . . . . . . . . . . . . . . . . . . . . . . . D-50(2) Disassembly of the Developing Unit and Replac

3-1. ADJUSTMENT JIGS AND TOOLS USED . . . . . . . . . . . . . . . D-683-2. ADJUSTMENT REQUIREMENTS LIST . . . . . . . . . . . . . . . . . D-693-3. A

(7) Adjustment of Manual Feed Paper Pick-Up Solenoid (SL9) Position . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-83(8) Adju

3DRIVE SYSTEME6713101FCDG584A161514312B9211 M-5

(15) Adjustment of the Image Trailing Edge Erase Width (Adjust 2/2: A13 Trailing Edge Erase Adjust) . . . . . . . . . D-116(16) Adjustment of the Ima

1SERVICE INSTRUCTIONS1-1. PRECAUTIONS FOR DISASSEMBLY/ADJUSTMENTSObserve the following precautions whenever servicing the copier.•Be sure to unplug th

<Identification of Fuses and Circuit Breakers> Scanner Control Processor Board PWB-J Circuit Breaker: 3.15A Fusing Roller Thermal Fuse TF2: 220

1-2. INSTRUCTIONS FOR HANDLING THE PWBs WITH MOS ICs The following precautions must be observed when handling P.W. Boards with MOS (MetalOxide Semicon

If the surface is contaminated with fingerprints, clean it using the following procedure.2. Gently wipe the residual toner off the surface of thePC Dr

1-4. PARTS WHICH MUST NOT BE TOUCHED(1) Red Painted ScrewsRed painted screws show that the assembly or unit secured can only be adjusted or set at the

2-1. DOORS, COVERS, AND EXTERIOR PARTS: IDENTIFICATION ANDREMOVAL PROCEDURES67854321131211109142DISASSEMBLY/REASSEMBLY1516172518192021222324D-6

No. Part Name Removal Procedure1 Front Lower DoorOpen the Front Lower Door. → Remove 2 belt mountingscrews. → Remove 4 Front Lower Door mounting screw

No. Part Name Removal Procedure15 Rear Upper Cover Remove 3 Rear Upper Cover mounting screws.16 Upper Rear CoverRemove 4 AFR-9 mounting screws. → Remo

2-2. REMOVAL OF CIRCUIT BOARDS AND OTHER ELECTRICALCOMPONENTS•When removing a circuit board or other electrical component, refer to "PRECAUTIONS

A = Fusing Motor M6: Drives the Fusing Unit, Paper Exit Roller, and SuctionBelts.1. Paper Exit Roller drive pulley2. Fusing Unit drive gear3. Suction

Symbol Name Removal ProcedurePWB-A Master Board Remove the Right Upper Cover. → Remove PWB-A.PWB-B MSC BoardOpen the Front Lower Door. → Open the Fron

Symbol Name Removal ProcedurePU4Pre-Image Transfer LampPower SupplyOpen the Front Lower Door. → Slide out the PC Unit.→ Remove the Cleaning Unit. → Re

2-3. PAPER TAKE-UP/TRANSPORT SECTIONS(1) Removal of the Paper Take-Up Unit1. Remove the Right Door (Multi Bypass Unit).2. Slide out the drawer.3. Remo

1. Remove the Paper Take-Up Unit.2. Unplug one connector of the Paper Take-Up Clutch.3. Remove three screws and the Paper Take-Up Clutchmounting brack

(3) Replacement of the Paper Take-Up Roll, Paper Feed Roll, and PaperSeparator Roll Assy3. Remove the pivot pins on both ends and the Guide Plate.4. R

7. Remove the C-clip and slide the bushing to the side.8. Slide the coupling to the left and remove the PaperTake-Up Roll Assy.9. Remove the C-clip a

(4) Cleaning of the Vertical Transport Rollers1. Open the Right Door.2. Using a soft cloth dampened with alcohol, wipe cleaneach Vertical Transport Ro

1075D017AA1. Remove the Right Rear Cover and Rear Lower Cover.2. Unplug the connectors from DC Power Supply BoardPWB-C and Drawer S/P Board PWB-F and

4. Open the Right Door (Multi Bypass Unit).5. Unplug two connectors, remove the two screws shown, and pull the Synchronizing Rollers Unitout to the fr

(8) Disassembly of the Synchronizing Rollers Unit1. Remove the Synchronizing Rollers Unit.2. Unhook one spring. Remove the Misfeed RemovalGuide Plate

ONPC Drum Charge Wire Cleaning Motor / ImageTransfer/Paper Separator Charge Wire Cleaning MotorM21/M22The surface temperature of the Upper Fusing Roll

8. Remove the Lower Transport Roller by sliding it in the direction shown.9. Remove the Lower Synchronizing Roller by sliding it in the direction show

(9) Removal of the Suction Belts1. Open the Front Lower Door and release and swing up the Upper Half of the copier.2. Remove two screws and the Image

(10) Disassembly of the Multi Bypass Unit3. Loosen two screws, slide the pivot shaft to the sideand remove the Multi Bypass Table.1. Remove the Right

6. Remove the Paper Take-Up Roll Assy by removing the two C-clips, gear, and bushings shown.5. Remove three screws, unplug two connectors, and remove

8. Remove four screws and the Guide Plate.9. Remove the Paper Separator Roll pressure spring.10. Remove the C-clip and Paper Separator Assy.11. Remov

(11) Removal of the 3rd Drawer1. Press the Paper Descent Key and slide out the 3rdDrawer.∗If pressing the Paper Descent Key does not allow you toslide

5. Remove three screws and the drive base plate.6. Remove four E-rings, four pulley covers and fourpulleys.7. Remove four wire holders and the Main Tr

1. Press the Paper Descent Key and slide out the drawer.∗If pressing the Paper Descent Key does not allow you toslide out the drawer, open the Right D

(14) Removal of the Lift-Up Motor (Inch areas only)1. Slide out the drawer.2. Remove one screw and the Lift-Up Motor Cover.3. Unplug one connector.4.

2-4. OPTICAL SECTION(1) Cleaning of the Original Glass1075D040AA1. Wipe clean the Original Glass with a soft cloth.1. Remove the Original Glass.2.

After 85 sec. or40 sec. or 5 sec.*Timing depends on the surface temperature of theUpper Fusing Roller and the difference in surfacetemperature between

4. Remove two screws shown and turn the Scanner sideways to remove the Scanner from thecopier.1. Remove the Scanner.2. Remove one screw and the Expo

(6) Cleaning of the 1st, 2nd, and 3rd Mirrors and Original Size DetectingSensors1. Remove the Original Glass.2. Wipe clean the 1st Mirror with a sof

4. Wipe clean the 4th and 5th Mirrors with a soft cloth.1. Open the Front Lower Door, slide out the PC Unit andrelease and swing up the Upper Half o

6. Remove one screw and the Light Blocking Mylarmounting bracket.7. Remove one screw that secures the Lens Drive Cable.8. Open the Front Upper Door,

1075D064AA11. Remove three screws and the Lens Drive Motor Assy.1075D065AA12. Snap off the E-ring and remove the 4th/5th MirrorsPositioning Lever.13

15. Work off the cable and remove the drive gear.(11) Winding of the Lens Drive Cable2. Wind the length of the cable with a bead on its endfour and

3. Wind the other length of the cable two and 1/2 turnscounterclockwise around the Cable Drive Gear,working from the front to back side. Then, tape i

8. Turn ON the Power Switch to bring the Lens to the fullsize position.9. Install the 4th/5th Mirrors Positioning Jig and, whenthe hole in the cam i

7. Remove six screws. Remove the holding brackets atthe front and rear of the Scanner Drive Shaft and theScanner Drive Shaft Assy.8. Disassemble the S

2. Holding the pulley as shown, wind the side of thecable with two fixing beads clockwise six turns aroundthe pulley, working from the back to front

E PWB-J outputs a LOW TRON signal to PWB-A.M3/M4ONApprox. 120 msec.ONSeparator Finger Solenoid SL6Approx. 280 msec.OFFSL6F PWB-J outputs a LOW SCEND s

7. Assemble the Scanner Drive Shaft Assy and install itin the copier.8. Loop the side of the cable with one fixing bead aroundthe outer pulley for t

2-5. PC UNIT(1) Sliding Out the PC Unit1. Remove the Developing Unit.2. Unplug one connector and remove the PC DrumCharge Corona.∗For the PC Drum Ch

1075D087AA4. Remove two screws from the lower guide frame andslide out the Pre-Image Transfer Erase Lamp.1. Remove the PC Drum Charge Corona.2. Unlo

1. Remove the PC Drum.2. Remove the Cleaning Unit.3. Turn over the Cleaning Unit, remove four screws,unplug one connector, and remove the PC DrumPaper

1075D094AA6. When reinstalling the PC Drum Paper SeparatorFingers, be sure to rehook the torsion coil springcorrectly as shown. After reinstallation,

1075D095AA1. Remove the PC Drum Paper Separator Fingers Assy.2. Remove two screws shown.3. Unplug one connector and remove the Toner AntispillSeal and

AB3. Holding onto both ends of the PC Drum, turn the PCDrum 1/2 turn in the direction of arrow A, then turn itone turn in the direction of arrow B.1.

2-6. PC DRUM CHARGE CORONA AND IMAGE TRANSFER/PAPERSEPARATOR CORONAS(1) Replacement of the PC Drum Charge Corona Wires and Wire Cleaner5. Unlock the w

4. Remove one screw and the Image Transfer/PaperSeparator Coronas.1. Blow all foreign matter off the Grid Mesh with a blowerbrush.1. Open the Front Lo

4. Unlock the wire cleaner lock and remove the wirecleaner.1075D112AA1. Using a soft cloth dampened with alcohol, wipe thehousing clean of dirt.1075D1

GThe trailing edge of the paper moves past Transport Roller Sensor PC26(unblocked: H ).Approx. 144 msec. OFFM3HThe trailing edge of the paper moves p

MINOLTA CO., LTD.1075-7992-11 94103720Printed in JapanCopyright1994 MINOLTA CO., LTDPrinted in JapanUse of this manual shouldbe strictly supervised to

EP6000SWITCHES ON PWBs,TECH. REP. MODE

1-1. Precautions for Transportation and Storage . . . . . . . . . . . . . . . . S-11-2. Precautions for Replacement/Inspection . . . . . . . . . . . .

3. System Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-333-1. System Setting setting procedure. . . . . . . . . .

1 PRECAUTIONS FOR HANDLING THE PWBs1-1. Precautions for Transportation and Storagea) Before transporting or storing the PWBs, put them in protective

2CONTROL PANEL KEYS AND TOUCH PANEL*For more details, see the "Operator’s Manual" shipped together with thecopier.2-1. Control Panel Keys123

1234567890C1134P476DAAuxiliaryReady to Copy1Auto Exp.ExposureAuto PaperPaperx1.000ZoomFinishingOrig. CopyBasicUser ModeJob RecallMode Check

2-2. Explanation of the Touch Panel•The screen shown on the Touch Panel is classified into the four types: theBasic, Warning, User Mode, and Tech. Rep

Auxiliary FinishingOrig. CopyExposure PaperZoomReady to copy.Auto Expo. x1.000 Auto Paper1134P429CA1BasicsStaple£ 1 2 3 4 5 7 6 8 5 Pape

(2) Warning Screen•The warning screen may be a malfunction display, error display, warningdisplay, or a caution display.•Here are examples to show wha

5WATCHDOG (CPU OVERRUN MONITOR) FUNCTION5-1. OverviewThe watchdog function monitors whether any of the CPUs mounted in thecopier overrun. If this func

3FUNCTIONS OF SWITCHES AND VARIABLE RESISTORS ON PWBs3-1. PWB LocationsPWB-CPWB-IS-7

3-2. Power Supply Board (PWB-C)•When the DT-103 is fitted to the copier, this switch is used to keep the power (DC5V) supplied tothe DT-103 if the Pow

3-3. Tech. Rep. Settings Switches Board (PWB-I)Symbol Name DescriptionS1Trouble Reset Switch Used to reset trouble related to ExposureLamp malfunction

<Point Clearing Procedure>•Initialize Points (PJ2)1. Turn the Power Switch OFF.2. With the PJ2I points (1, 2) shorted, turn the Power Switch ON.

4 USER’S CHOICE MODE•This mode is used by the user to make various settings according to user requirements.4-1. User’s Choice Mode Menu Screen•Select

4-3. Settings in the User’s Choice Mode4-3-1. Menu screen 1/61134P368EAUser's Choice 1/61/6 2/6 3/6 4/6 5/6 6/6Copy Mode Priority:Auto SizePaper

3. Paper PriorityUsed to select the paper in the priority paper source in the AMS or Manual Mode.Paper Source Initial Setting1st Drawer∗2nd Drawer3rd

2. Exposure Level Priority•Used to select the auto exposure level in the Auto Exposure mode.•Used to select the manual exposure level when the Auto Ex

4. Priority SortUsed to select the priority exit mode when the copier is fitted with an exit option.Screen Display Initial SettingNon Sort∗SortSort &a

2. Energy Saver ModeUsed to turn "ON" or "OFF" the Energy Saver Mode. Set the time for this Mode when "ON" isselected.De

10. OPTICAL SECTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . M-3410-1. Construction . . . . . . . . . . . . . . . . .

5-3. Watchdog Function Post-ProcessingThe following processing is performed if a faulty condition is detected in theCPU. The Watchdog Counter availabl

4-3-4. Menu screen 4/61134S030CAUser's ChoiceOriginal Thickness:Confirmation Beep:Intelligent Sort:Smaller Originals:Exit1/6 2/6 3/6 4/6 5/6 6/6S

4. Smaller OriginalsUsed to turn "ON" or "OFF" the copying of originals of the minimum detectable size (less than A5lengthwise).Sc

2. Custom 2-in-1 SeparationUsed to specify the priority modes (Paper, Zoom, Margin, Erase) when 2-in-1 Separation is selected.Mode Description Initial

4. Special PaperUsed to specify the type of paper loaded in each paper source.Screen DisplayS0: NormalS1: RecycledS2: Insert PaperS3: Not for 2-Sided&

4-3-6. Menu screen 6/61134S032CAUser's ChoiceMax. Copy Sets:Exit1/6 2/6 3/6 4/6 5/6 6/6Select a key to change setting, orpress Pg.# Key for addit

2. User HelpWhen the user sends a User Help code according to the status of the copier fitted with the DT-103,this function transmits that status to t

1134S034CATech. Rep. Mode MenuFunctionExitROM VersionTech. Rep. Choice RD ModeSystem Input ADF CheckCounter Level HistoryI/O Check Machine statusLast

5-3. Settings in the Tech. Rep. Mode1. Function•Used to adjust/confirm various Tech. Rep. functions.1075S003CBFunctionF1 PaperPassageMenuF7 Orig. Sens

● F4 (HV Separator)Used to confirm the output of the High Voltage Unit (HV) for the Paper Separator Corona. (Forfactory setting)<Operation time>

1-3. Components energized in the Function modeF1 F2 F3 F4 F5 F6 F7 F8 FD FEPC Drum Drive Motor O O O O O O — O — OFusing Motor O————O————Fan Motors OO

Faulty CPU Processing (in Standby)Processing (during Copy Cycle)Other thanabove1 : When the CPU malfunctions, thecommunication to MSC BoardPWB-B of th

1134S036CATech. Rep. ChoiceEnterTech. Rep. Choice 1NextPlug-In CounterSize CounterTotal CounterMaintenance CallCopy Kit CounterToner Empty Stop# of Sh

● Size CounterUsed to select the paper size counted by the Paper Size Counter.ScreenDisplayInitialSettingNoA3∗ScreenDisplayInitialSettingA3/B4A3/B4Scr

<Setting of the Tech. Rep. Choice Mode When the D-102 Is Installed on the Copier>•When the D-102 is fitted to the copier, set the Tech. Rep. Cho

● Copy Kit CounterUsed to select "Yes" or "No" for "Copy Kit" counting by the Consumables Counter or to "Enable&quo

● Sorter TroubleUsed to select "Enable Copy" or "Disable Copy" when a malfunction of the paper exit option isdetected.Screen Displ

● Loop Adjust (Man/LCT)Used to adjust the loop length (before the Synchronizing Roller) of the paper fed manually orfrom the paper feed option.Code Lo

3. System Setting•This mode is used to set the fixed zoom ratio, paper size input, marketing area and Plug-InCounter, or to advance the Drum Charge Co

● Marketing AreaUsed to change the paper size/fixed zoom ratio according to the marketing area.Screen Display Factory SettingMJMH Europe AreaScreen Di

4. Counter•This mode is used by the Tech. Rep. to set the counts of the Maintenance Counter andConsumables Counter or to show the counts of various co

● JamCounts the number of jams that occurs in the copier or entire system (MCBJ) and per section.<Jam Counter 1/3>Screen Display DescriptionMCBJ

6-1. Overview of the Malfunction Bypass Function•When a malfunction occurs in the copier, the malfunction bypass functionpermits the copier to continu

● RetryCounts the number of feed retries which are made when no paper reaches the Paper Take-UpSensor in a given period of time in order to reduce mis

<Trouble 2/7>Screen DisplayDescriptionCode LocationC0070/1 Main Hopper MotorMain Hopper Toner Replenishing Motor rotationmalfunctionC0072/3 Sub

<Trouble 4/7>Screen DisplayDescriptionCode LocationC0660 Scanner System Scanner load malfunctionC06FX Scanner Interface Scanner Interface malfun

<Trouble 6/7>Screen DisplayDescriptionCode LocationC0F66 Paper Size Sensor Paper Size Sensor malfunctionC0F79 Paper Empty Sensor 3rd Drawer Pape

▲● MaintenanceSet the next maintenance time based on copy cycle count. The count is increased by 1 per copycycle. When the count reaches the setting,

● Port/OptionCounts the frequency of use per port/option as reference data to be used by the Tech. Rep. inmaintenance.<Port/Option 1/3>Screen Di

● ConsumablesSet the life of the consumables. When the count which increases one per copy cycle reaches theset count, the Maintenance Call message and

- Maintenance Code Display Resetting Procedures -•Code: M1Displayed to indicate that the count of any Maintenance Counter has reached the set count.&l

5. I/O Check•This mode is used to check the Sensors and Boards at the occurrence of a jam or malfunction todetermine the location of the fault.1134S04

<IC Port Data 1/8>IC No. PortData7654 / 3210PWB-A(IC1A)P47-0P57-0P67-0P87-01H11111∗101L111∗00H1∗1H∗∗0LH∗11∗PWB-A(IC4A)APA7-0APB7-0APC7-0BPA7-0H1

6-2. Candidates for Isolated Malfunctions●Copier-RelatedItem Malfunction Code1 1st Drawer C0920/C0924 *1. C0921~23/C09262 2nd Drawer C0910/C0914 *2. C

<IC Port Data 3/8>IC No. PortData7654 / 3210PWB-A(IC5A)BPC7-0φ3-0H∗H∗H∗H∗H1L1H1H1PWB-F (4)(IC1F)PB3-0/PA3-0PD3-0/PC3-0PF3-0/PE3-0PH3-0/PG3-0PB3-

<IC Port Data 6/8>IC No. PortData3210 / 3210PWB-F (3MC)(IC1F)PF3-0/PE3-0PH3-0/PG3-00∗0∗01000L0H0100PWB-F (3MC)(IC2F)PB3-0/PA3-0PD3-0/PC3-0PF3-0/

● Paper Path Sensors CheckThe passage of paper causes the states of the Paper Path Sensors to be switched from "1 to 0"or "0 to 1"

● Memory CheckUsed to check whether the ROM/RAM on the PWB-B Board (MSC Board) is accessed properly ornot.Check Result Screen Display ActionNormal&quo

6. Last Trouble•Displays the copy mode in which the most recent malfunction occurred.Item DescriptionCopy paper APS, paper sizeZoom ratio AMS, zoom ra

7. ROM Version•Displays the current ROM version loaded in the system.1134S045CAROM VersionMenuROM VersionMSC/PanelMasterSCPADFSorterData ControllerMes

8. RD Mode•Select this mode when the copier is fitted with the DT-103.1134S052CARD ModeMenuID CodeDT SettingInitialTransmissionData Save Call Completi

4. Press the "Next" key.5. Select "Dial Mode" and set the Dial Mode with the "Change" key according to the type of thete

● Counter ClearUsed to clear the Spare Counter to be cleared.1134S055CARD ModeMenuSpareCounter Clear1 2 3 4 56 7 8 9 1011 12 13 14 1516 17 18 19 20<

9. ADF Check/Setting•This mode is used to check the operation of the Automatic/Duplexing Document Feeder and toadjust the document stop position in ea

7-1. Overview of the Image Stabilization System◆ The following image stabilization controls are provided to ensurestabilized copy image.Item Quality P

9-2. Settings in the ADF Check/Setting mode● Paper Passage & Input CheckThe results of the Paper Passage Check and Sensor Check of the document pa

● Doc. Stop Position SetUsed to adjust the document stop position in each mode.- 1-Sided -Used to adjust the stop position of 1-sided documents when t

- 2in1-Used to adjust the stop position of 2-in-1 documents when the Automatic/Duplexing DocumentFeeder is used on the copier.Setting Description Init

10. Level History•This mode is used to display and set various level operating values to the operating status of themachine.<Level History 1/2>S

11. Machine Status•This mode is used to display up to five codes of isolated malfunctions that have occurred. Thefollowing malfunctions are detected a

12. Administrator Mode•This mode is used to set the administrator number in addition to the functions on "Menu Screen6/6" in the User’s Choi

6ADJUST MODE•This mode is used to adjust the optical components before shipment from the factory and must notbe executed except when the PWB-R (RAM Bo

Setting Description Initial Setting43 ±0 steps44 +2 steps45 +4 steps46 +6 steps47 +8 steps48 +10 steps49 +12 steps50 +14 steps∗Setting Description Ini

● Feeding Direction Magnification Ratio Adjustment (A-3)Adjusts the magnification ratio in the feeding direction by finely adjusting the scan speed.Se

● Lens Position Full Size Registration (A-4)Adjusts the leading edge for a full size copy by changing the engagement timing of theSynchronizing Roller

Item Quality Purpose ControlOne-ShotCorrection(When thePowerSwitch isturned ON)Imagedensity,gradationTo compensate forany drop in surfacepotential of

● Lens Position Reduction Registration (A-5)Adjust the leading edge for a reduction copy by changing the engagement timing of theSynchronizing Roller.

● Book B Scan Registration (A-6)Adjust Book Scan B by changing the engagement timing of the Synchronizing Roller.Setting Description Initial Setting45

● Leading Edge Erase Adjustment (A-12)Corrects the width of erase on the leading edge of an image by changing the ON timing of theImage Erase Lamp.Set

7LIST OF SETTINGS TO BE MADE DUE TO PARTS REPLACEMENTParts ChangedRAMBoardPC Drum StarterAIDCSensorATDCSensorOriginalSizeDetectingSensorExposureLampOr

MINOLTA CO., LTD.1075-7997-11 94103720Printed in JapanCopyright1994 MINOLTA CO., LTDPrinted in JapanUse of this manual shouldbe strictly supervised to

EP6000TROUBLESHOOTING

11-1. General Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-11-2. How to Use This Book . . . . . . . . . . . . . . . .

2-4. C0040: Suction Fan Motor M18’s Failure to Turn . . . . . . . . . T-72C0042: Toner Suction Fan Motor M20’s Failure to TurnC0043: Toner Suction Fa

2-13. C0511: Lower Fusing Roller Abnormally Low C0511: Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T-89C0521: Lower Fusi

2-20. C0998: Shifter Transfer Failure. . . . . . . . . . . . . . . . . . . . . . . T-106C0999: Shifter Return FailureC099A: Shifter Return FailureC099

7-2. AIDC Sensor To provide image stabilization control, this copier has AIDC Sensor UN9fitted to the Cleaning Unit of the PC Unit. The sensor is used

1 INTRODUCTION1-1. General Precautions1. When servicing the copier with its covers removed, use utmost care to prevent your hands, clothing, and tools

1-4. Method for Checking the Control Parts with Loads To check the Control parts easier and safer, this copier allows the TechnicalRepresentative to d

<Checking a Control Part with a load by changing the Input Port Data>To ➀ on next page.The 1st Drawer Paper Take-Up Sensor PC6 is probably fault

➀ 4) Make sure that the on-the-screen data of PA2 input port on PWB-F (IC2F) is " " (sensor notblocked). H 5) Move the Actuator of PC6 an

1075T095CCNextChangePort7PWB-A(IC4A)PWB-A(IC5A)BPB7-0BPC7-0 3-0APA7-0APB7-0APC7-0BPA7-0BPB7-0ICIC Port DataBackUpMenu2/86543210HHLHHLHLLL/10101LL1111

➀ 4) Make sure that the on-the-screen data of APA2 output port on PWB-A (IC5A) is "1" (CL5:deenergized).5) Press the "Change" key

— Port Check Screens —*The following screens arethose in the standby state.1075T096CBNextChangePort7PWB-A(IC1A)PWB-A(IC4A)ICIC Port DataBackUpMenu1/86

Blinking Misfeed locationLit Paper location2PAPER TRANSPORT FAILURE1211133 2 114156784510 91075T110CA1. Paper MisfeedWhen a paper misfeed occurs in th

<Misfeed Detection Sensor Layout>Duplex Unit TurnoverPath Sensor PC39Duplex Unit PaperEntry Sensor PC38Duplex Unit PaperEmpty Sensor PC41Turnove

2. Types of Misfeed Detection and Detection Timings<Paper Take-Up Misfeed>Type Detection TimingPaper take-upfailure detectionThe Vertical Transp

7-3. AIDC Sensor Control◆There are five processes performed as the AIDC Sensor control:➀AIDC Sensor variation adjustment➃Optimum Exposure Lampvoltage

H H H <Multi Bypass Misfeed>Type Detection TimingBypass papertake-up failuredetectionThe Transport Roller SensorPC26 is not blocked ( ) ap

<Duplex Unit Paper Take-Up Misfeed>Type Detection TimingLeading edgedetection byTurnover FeedSensor PC37PC37 is not blocked ( ) approx.1.92 s

1075C03TCA3. Misfeed Clearing Procedures3-1. Copier Take-Up MisfeedPWB-APC10PC6PC11PC7PC8PC12CL3PWB-FM2CL1CL21075T050AASymbol NameCL1CL2CL3M2PC6PC7PC8

<Copier Take-Up Misfeed Clearing Procedure>Symptom Step Check Item Result Action•Paper is nottaken up at all. 1Does the paper being used meetpro

Symptom Step Check Item Result Action•Paper is at astop beforethe VerticalTransportSensor.1 When the 2nd Drawer is used Check the operation of Paper

Symptom Step Check Item Result Action•Paper is at astop in theVerticalTransportSection.1Are the Vertical Transport Rollersdeformed, worn, or dirty wit

Symptom Step Check Item Result Action•Paper is at astop in theVerticalTransportSection.1 When the 2nd Drawer is used Check the 2nd Drawer PaperTake-

Symptom Step Check Item Result Action•Paper is at astop in theVerticalTransportSection.2Check the Vertical TransportSensor 3 PC12. 1)2)Remo

3-2. Transport/Separator Misfeed1075C04TAAPWB-FM3PWB-APC26PC27SL6M18Symbol NameM3M18PC26PC27SL6PWB-APWB-FTransport MotorSuction Fan MotorTransport Rol

<Transport/Separator Misfeed Clearing Procedure>Symptom Step Check Item Result Action•Paper is at astop in theTransportRoller Section.1Are the T

1075C50MAA M-20

Symptom Step Check Item Result Action•Paper is at astop near thePC Drum.1Is the Pre-Image Transfer GuidePlate deformed or dirty?YESClean, correct or c

Symptom Step Check Item Result Action•Paper is at astop on theSuction Belts.1When the Main Drive Motor is run,do the Suction Belts turn?NOCheck the dr

1075C05TAA3-3. Multi Bypass MisfeedSL5PWB-APC28CL9Symbol NameCL5PC28SL9PWB-AManual Feed Paper Take-UpClutchManual Feed Paper EmptySensorManual Feed Pa

<Multi Bypass Misfeed Clearing Procedure>Symptom Step Check Item Result Action•Paper is nottaken up at all. 1Is the paper fed out of the copierp

Symptom Step Check Item Result Action•Paper is nottaken up at all.6Check the operation of ManualFeed Paper Pick-Up Solenoid SL9. 1)2)Remove

1075C06TAA3-4. Fusing/Exit MisfeedPC36PWB-AM1 8Symbol NameM18PC36PWB-ASuction Fan MotorPaper Exit SensorMaster BoardT-26

<Fusing/Exit Misfeed Clearing Procedure>Symptom Step Check Item Result Action•Paper is at astop beforethe FusingRoller.1Is the Fusing Guide Plat

1075C07TAA3-5. Duplex Unit Transport/Entry MisfeedPWB-APWB-GPC41PWB-FPC37SL11SL1PC39SL2PC38Symbol NamePC37PC38PC39PC41SL1SL2SL11PWB-APWB-FPWB-GTurnove

<Duplex Unit Vertical Transport Misfeed Clearing Procedure>Symptom Step Check Item Result Action•Paper is at astop in theExit Section.1Check the

Symptom Step Check Item Result Action•Paper is at astop in theTurnoverSection of theDuplex Unit.1Refer to Step 1 above, run DuplexUnit Drive Motor M7,

➂ T/C Control Level Setting (Correction)The copier produces a solid-black pattern on the PC Drum and the AIDCSensor reads the image density (ID) of t

<Duplex Unit Entry Misfeed Clearing Procedure>Symptom Step Check Item Result Action•The leadingedge of thepaper is at astop insidethe DuplexUnit

3-6. Duplex Unit Take-Up Misfeed1075C08TAAPWB-APWB-GPC40SL4PWB-FCL6M2Symbol NameCL6M2PC40SL4PWB-APWB-FPWB-GDuplex Unit Paper Take-UpClutchVertical Tra

Symptom Step Check Item Result Action•Paper isnot takenup at all.1Are the Take-Up Roll, Feed Rolland Separator Roll deformed,worn, or dirty with paper

3MALFUNCTIONThe copier CPU has a function to self-diagnose the copier conditions. On detection of a malfunction,the corresponding malfunction name, lo

5 secM5PC Drum MotorLock SignalHL1075T116CAONOFF1.2 secM6Fusing MotorLock SignalONOFFHL1075T113CB5 secM6Fusing MotorLock SignalHL1075T114CAONOFF1 secM

2 secM18Suction Fan MotorLock SignalONOFFHL1075T119CA1 secM1Paper Take-Up MotorLock SignalONOFFHL1075T117CC1.5 secM1Paper Take-Up MotorLock SignalHL10

2 secM17Optical Section CoolingFan Motor Lock SignalONOFFHL1075T122CA10 secM5Optical Section CoolingFan Motor Lock SignalHL1075T123CBONOFF2 secM8Fusin

10 secM29Power Supply UnitCooling Fan MotorLock SignalHL1075T127CCONOFF5 secM14HL1075T128CAONOFFPC3020 secM8Fusing Ventilation Fan MotorLock SignalHL1

7 secM21HL1075T131CAForward rotationOFFPC5420 secOFFHL1075T132CAM21Backward rotationPC542 secM14PC30HL1075T130CAONOFF10 secM14HL1075T129CAONOFFPC30C00

C02∗∗ (PC Drum Charge, Image Transfer/Paper Separator Coronas malfunctions)* Code Description Detection TimingC0200 PC Drum ChargeCorona failureThe Sh

15. PAPER TAKE-UP/FEED SECTION . . . . . . . . . . . . . . . . . . . . . . . . M-9515-1. Construction . . . . . . . . . . . . . . . . . . . . . . . .

(2) A correction is made when the second or subsequent F5 testoperation is run after the Exposure Lamp has been cleaned or "Exp.Lamp Manual Adj.&

•The copier performs a self-diagnostic sequence to determine if themicroprocessor outputs a signal to each of the IC ports on the Master BoardPWB-A pr

∗ CodeDescription (Input oroutput signal fault)Port onMasterBoardDetection TimingC0321Exit/Duplex SwitchingSolenoid (SL1) REMIC4A BPB1•When the "

•When the "Board Check" of "I/O Check"in the Tech. Rep. Mode is executed.•When a malfunction is detected.•When the "Board Che

C04∗∗ (Exposure Lamp malfunctions)∗Code Description Detection TimingC0400 Exposure Lamp LA1’sfailure to turn ONThe output from the AE Sensor Board PWB

C05∗∗ (Fusing Unit malfunctions)∗Code Description Detection TimingC0520 Abnormally high fusingtemperature (UpperFusing Heater Lampturning ON at abnorm

C06∗∗ (Optical Section malfunctions)∗Code Description Detection TimingC0601 SCP Board PWB-JmalfunctionWith no encoder pulses input to PWB-J for 100 to

<During prescan>•When the Scanner is at other than the home position,the SHOME signal does not go LOW 5 seconds afterthe Power Switch has been t

C09∗∗ (Paper Take-Up Section malfunctions)* Code Description Detection Timing* C0900 3rd Drawer Lift-Up failure* C0904 3rd Drawer Lift-Up MotorM25’s f

5 secHL1075T145CAM24Forward rotationPC15Backward rotationHLPC57150 count20 countHL1075T146CAM24StopPC57Backward rotationHLPC15C09∗∗ (Paper Take-Up

L C09∗∗ (Paper Take-Up Section malfunctions)* Code Description Detection Timing* C0912(InchAreas)2nd DrawerLower-Down failure2nd Drawer Lock failure*

➄ AE Sensor Gain AdjustmentThe output from the AE Sensor which detects the original image densityin the Auto Exposure mode varies depending on the in

C09∗∗ (Paper Take-Up Section malfunctions)* Code Description Detection Timing* C0914 2nd Drawer Lift-UpMotor M24’s failure toturn* C0916(InchAreas)2nd

C09∗∗ (Paper Take-Up Section malfunctions)* Code Description Detection Timing* C0922(InchAreas)1st Drawer Lower-Downfailure1st Drawer Lock failure* C0

500msecHL1075T156CAONPC56OFFM23200msecC09∗∗ (Paper Take-Up Section malfunctions)* Code Description Detection Timing* C0924 1st Drawer Lift-Up MotorM23

C09∗∗ (Paper Take-Up Section malfunctions)* Code Description Detection Timing* C0990 Main Tray upwardmotion failureThe 3rd Drawer Lift-Up Sensor PC16

C09∗∗ (Paper Take-Up Section malfunctions)* Code Description Detection Timing* C0992 Main Tray downwardmotion failure3rd Drawer Tray Lower Position Se

C09∗∗ (Paper Take-Up Section malfunctions)* Code Description Detection Timing* C0998 Shifter transfer failure The 3rd Drawer Shifter Return Position S

C09∗∗ (Paper Take-Up Section malfunctions)* Code Description Detection Timing* C099b Shifter transfer failure PC47 cannot detect a leading ( → )

C0d∗∗ (Duplex Unit malfunctions)∗Code Description Detection Timing∗C0d00 Duplex Unit Front/RearEdge Guide Plateshome position detectionfailureThis pos

C0d∗∗ (Duplex Unit malfunctions)∗Code Description Detection Timing∗C0d51 Duplex Unit Drive MotorM7 turning at abnormaltimingThe Motor Lock signal (

C0F∗∗ (Sensor malfunctions)∗Code Description Detection Timing∗C0F02 Original Size DetectingBoard UN2 malfunction<In F7 mode>1) The Busy signal d

◆ Control Processing Timing➀AIDC Sensor variation adjustment➃Optimum Exposure Lampvoltage setting (correction)➁AIDC Sensor contamination correction➂T/

C0F∗∗ (Sensor malfunctions)∗Code Description Detection TimingC0F10 AE Sensor BoardPWB-H malfunction∗C0F20 AIDC Sensor UN9variation correctionfailure∗C

C0F∗∗ (Sensor malfunctions)∗Code Description Detection Timing∗C0F23 AIDC Sensor UN9exposure correctionfailureThe AIDC Sensor output voltage does not b

Code Description Detection Timing and Sensor LayoutC0FE1 Original Size DetectingSensor ➊ failureC0FE2 Original Size DetectingSensor ➋ failureC0FE3 Ori

Metric Areas•➊: UN5, ➋: UN4, ➌: UN3 (option), ➍: UN6, ➎: UN7 (option)∗ UN3 and UN7 are standard for Hong Kong area.•A to E: Sensor locations∗ Code Des

L C09C∗ (C-302 malfunctions)∗ Code Description Detection Timing∗ C09C0 Elevator ascent failure∗ C09C1 Elevator descent failure H •The Paper Raised Po

2. Troubleshooting Procedures2-1. C0000: Fusing Motor M6’s Failure to TurnC0001: Fusing Motor M6 Turning at Abnormal TimingSymbol NameM6PWB-AFusing Mo

Step Check Item Result Action1 Is the malfunction code C0000? NO•To Step 5.2Check the M6 REM signal as describedbelow: 1) Reset the malfu

2-2. C0010: PC Drum Drive Motor M5’s Failure to TurnC0011: PC Drum Drive Motor M5 Turning at Abnormal TimingM5PWB-ASymbol NameM5PWB-APC Drum Drive Mot

Step Check Item Result Action1 Is the malfunction code C0010? NO•To Step 5.2Check the M5 REM signal as describedbelow: 1) Reset the malfu

2-3. C0020: Paper Take-Up Motor M1’s Failure to TurnC0021: Paper Take-Up Motor M1 Turning at Abnormal TimingM1PWB-ASymbol NameM1PWB-APaper Take-Up Mot

8PC DRUM8-1. PC Drum•The photoconductor used in this copier is the organic photoconductor(OPC) type.•The drum is made up of two distinct, semiconducti

Step Check Item Result Action1 Is the malfunction code C0020? NO•To Step 5.2Check the M1 REM signal as describedbelow: 1) Reset the malfu

2-4. C0040: Suction Fan Motor M18’s Failure to TurnC0042: Toner Suction Fan Motor M20’s Failure to TurnC0043: Toner Suction Fan Motor M20 Turning at A

∗Failure to Turn (C0040/C0042/C004A/C004E)Step Check Item Result Action1Check the Motor REM signal as describedbelow: 1) Reset the malfun

2-5. C004c: Ventilation Fan Motor M8/M19’s Failure to TurnC004d: Ventilation Fan Motor M8/M19 Turning at Abnormal TimingM19M8PWB-ASymbol NameM8M19PWB-

Step Check Item Result Action1 Is the malfunction code C004c? NO•To Step 5.2Check the M8/M19 REM signal as describedbelow: 1) Reset the m

2-6. C0070: Main Hopper Toner Replenishing Motor M14’s Failure toTurnC0071: Main Hopper Toner Replenishing Motor M14 Turning atAbnormal TimingC0072: S

∗C0070, C0071Step Check Item Result Action1Do as described below to check whetherM14 rotates: 1) Open the Upper Front Door and turn theTo

2-7. C0080: Synchronizing Motor M4 Turning at Abnormal TimingPWB-ACN29CN30M4PWB-TPWB-CPU3Symbol NamePU3PWB-APWB-CM4PWB-TDC Stabilizing Power Supply 2M

Step Check Item Result Action1Is the voltage across CN30 (2P) Pin 2 andGND DC36V?NO•Check PU3 and PWB-C.2Are PJ3A and CN29 securely plugged intoPWB-A?

2-8. C0100: PC Drum Charge Wire Cleaning Motor M21’s Failure to TurnC0110: Image Transfer/Paper Separator Charge Wire CleaningMotor M22’s Failure to T

<PC Drum Drive Control>M5 is energized and deenergized by the output from pin 52 of IC5A onMaster Board PWB-A.= M5 Energization Timing =M5 is en

∗The procedures for C0100 and C0110 are the same. The parts for C0110 are indicated in theparentheses.Step Check Item Result Action1Is the Cleaner Hol

2-9. C0200: PC Drum Charge Corona FailureC0210: Image Transfer/Paper Separator Coronas FailurePWB-AHV1HV2Symbol NameHV1HV2PWB-APC Drum Charge HVImage

∗C0200Step Check Item Result Action1Is the PC Drum Charge Corona installedproperly?NO•Install the PC Drum ChargeCorona properly.2Are the PC Drum Charg

2-10. C03** (Master Board, Harness malfunction)∗C0300 to C0334DStep Action1 Change PWB-A.∗C0351, C0352, C0371, C0372Step Action1 Check that PJ11A is s

2-11. C0400: Exposure Lamp LA1’s Failure to Turn ONC0410: Exposure Lamp LA1 Turning ON at Abnormal TimingPWB-APU5PWB-LPWB-HTF1LA1Symbol NameLA1TF1PU5P

Step Check Item Result Action1Do as described below to check whether theExposure Lamp LA1 turns ON: 1) Reset the malfunction.2) Select &q

2-12. C0500: Warming-Up FailureC0510: Upper Fusing Roller Abnormally Low TemperatureC0520: Upper Fusing Roller Abnormally High TemperatureC0522: Upper

∗C0500, C0510Step Check Item Result Action1When the Fusing Unit Front Door isremoved and the Power Switch is turnedON, do the Upper Fusing Roller Main

2-13. C0511: Lower Fusing Roller Abnormally Low TemperatureC0521: Lower Fusing Roller Abnormally High TemperatureC0523: Lower Fusing Roller Thermistor

∗C0511, C0523Step Check Item Result Action1When the Fusing Unit Front Door isremoved and the copier has completedwarming-up, does the Lower Fusing Rol

8-3. Grounding of the PC DrumThe PC Drum ground point is inside the rear end. When the PC Unit is slidinto the copier, the Drum Holding Shaft contacts

2-14. C0600: Scanner Motor M11 MalfunctionC0601: SCP Board PWB-J MalfunctionC0650: Scanner Reference Position Sensor PC1 MalfunctionC0660: Scanner Loa

∗C0600, C0601Step Check Item Result Action1 Is PJ6J securely plugged into PWB-J? NO•Plug it in securely.2When the Power Switch is turned ON, is thevol

2-15. C0610: Lens X-Direction Motion FailureC0611: Lens Y-Direction Motion FailurePWB-APWB-JPC3M13M12PC2PWB-KSymbol NameM12M13PC2PC3PWB-JPWB-KLens X-D

∗C0610Step Check Item Result Action1When PC2 is blocked, does the voltageacross PJ3J-2 on PWB-J and GND changefrom DC5V to DC0V?NO•Change PC2.2By open

2-16. C0910: 2nd Drawer Lift-Up FailureC0914: 2nd Drawer Lift-Up Motor M24’s Failure to TurnC0920: 1st Drawer Lift-Up FailureC0924: 1st Drawer Lift-Up

<Inch Areas>1075C31TDAT-96

∗C0910Step Check Item Result Action1Slide out the 2nd Drawer and check the 2ndDrawer Lift-Up Sensor PC15 as describedbelow: 1) Select &qu

∗C0914Step Check Item Result Action1Slide out the 2nd Drawer and slide it backin. Does the 2nd Drawer Lift-Up Motor M24rotate?YES•To Step 3.2When the

2-17. C0911: 2nd Drawer Lower-Down Failure (Inch Areas)C0912: 2nd Drawer Lower-Down Failure, 2nd Drawer Lock FailureC0913: 2nd Drawer Lock FailureC091

∗C0911 (Inch Areas)Step Check Item Result Action1Slide out the 2nd Drawer and check the 2ndDrawer Lift-Up Sensor PC15 as describedbelow: 

9DRUM CHARGING9-1. PC Drum Charge Corona•The PC Drum Charge Corona of this copier is provided with two coronawires and Scorotron grids, depositing a D

2-18. C0921: 1st Drawer Lower-Down Failure (Inch Areas)C0922: 1st Drawer Lower-Down Failure, 1st Drawer Lock FailureC0923: 1st Drawer Lock FailureC092

∗C0921 (Inch Areas)Step Check Item Result Action1Slide out the 1st Drawer and check the 1stDrawer Lift-Up Sensor PC14 as describedbelow: 

2-19. C0990: Main Tray Upward Motion FailureC0991: Main Tray Downward Motion FailureC0992: Main Tray Downward Motion FailureC0993: Main Tray Upward Mo

∗C0990, C0991Step Check Item Result Action1Slide out the 3rd Drawer and check the 3rdDrawer Lift-Up Sensor PC16 as describedbelow: 1) Sel

∗C0992, C0993Step Check Item Result Action1Slide out the 3rd Drawer and check the 3rdDrawer Tray Lower Position Sensor PC46as described below: 

2-20. C0998: Shifter Transfer FailureC0999: Shifter Return FailureC099A: Shifter Return FailureC099b: Shifter Transfer FailureC099C: 3rd Drawer Shift

∗C0998, C0999Step Check Item Result Action1Slide out the 3rd Drawer and check the 3rdDrawer Shifter Return Position Sensor PC48as described below: 

∗C099A, C099bStep Check Item Result Action1Slide out the 3rd Drawer and check the 3rdDrawer Shifter Home Position Sensor PC47as described below: 

2-21. C0996: 3rd Drawer Lock Release FailureC0F79: Paper Empty Sensor FailurePWB-APWB-FSL8PC60PWB-EPC24PWB-HPC61Symbol NamePC24PC60PC61SL8PWB-APWB-EPW

∗C0996Step Check Item Result Action1Check the operation of the 3rd Drawer LockSolenoid SL8 as described below: 1) Reset the malfunction.2

<Theory of Scorotron System with Two Wires>Constant-VoltageCircuit PC DrumHV1HV1 turns ON and DC negative coronaemissions begin from the two cor

∗C0F79Step Check Item Result Action1Does this failure occur when the Main Trayhas completed upward motion?YES•To Step 3.2Does this failure occur when

∗C0F79Step Check Item Result Action5With no paper on the Shift Tray, check the3rd Drawer Shift Tray Paper Empty SensorPC60 as described below: 

2-22. C0d00: Duplex Unit Front/Rear Edge Guide Plates Home PositionDetection FailureC0d20: Duplex Unit Trailing Gate Unit Home Position DetectionFailu

∗C0d00Step Check Item Result Action1Slide out the Duplex Unit, move theFront/Rear Edge Guide Plates to other thantheir home positions, and slide the D

2-23. C0E00: Main Erase Lamp LA2’s Failure to Turn ONC0E01: Main Erase Lamp LA2 Turning ON at Abnormal TimingPWB-ALA2Symbol NameLA2PWB-AMain Erase Lam

∗C0E00Step Check Item Result Action1When the Start Key is turned ON, does theMain Erase Lamp LA2 light up?YES•To Step 3.2When the Start Key is turned

2-24. C0E20: Image Erase Lamp LA3 Connection FailureStep Check Item Result Action1Check the Loading signal as describedbelow: 1) Select &

2-25. C0F10: AE Board PWB-H MalfunctionStep Check Item Result Action1When the Scanner is at its home position,the Exposure Lamp is OFF, and the AFR-9i

2-26. C0F20: AIDC Sensor UN9 Variation Correction FailureC0F21: AIDC Sensor UN9 Contamination Correction FailureC0F23: AIDC Sensor UN9 Exposure Correc

2-27. C0F30: ATDC Sensor UN8 FailureC0F31: ATDC Sensor UN8 FailureStep Check Item Result Action1Is the value for "Set" of "ATDC Level&q

9-2. Control of the PC Drum Charge CoronaThe PC Drum Charge Corona is turned ON and OFF by the output signalfrom pin 76 of IC5A on Master Board PWB-A.

2-28. C0F66: Manually Fed Paper Width Reference Position FailurePWB-AVR1Symbol NameVR1PWB-AManual Feed Size DetectingResistorMaster Board1075C27TAAT-1

Step Check Item Result Action1Is this malfunction code displayed when thefunction mode Fd-0 (Inch Area) or Fd-2(Metric Area) is executed?NO•To Step 4.

2-29. C0F02: Original Size Detecting Board UN2 MalfunctionC0FE1 to C0FFF: Original Size Detecting Sensor FailurePWB-AUN2UN6UN7UN5UN4UN3Symbol NameUN2U

∗C0F02Step Check Item Result Action1Is the jumper connector fitted properlyacross J1 and J2 on UN2?NO•Change the position of thejumper connector.2Is P

3. Power is not Turned ONSymbol NameS1S2S5RY1UN1PU2PWB-APWB-BPWB-CPWB-DPower SwitchLower Front Door InterlockSwitchRight Door Interlock SwitchMain Rel

1075C29TBAT-126

MINOLTA CO., LTD.1075-7998-11 94105550Printed in JapanCopyright1994 MINOLTA CO., LTDPrinted in JapanUse of this manual shouldbe strictly supervised to

9-3. PC Drum Charge Corona Wires Cleaning Mechanism/ControlThe PC Drum Charge Corona is provided with a mechanism thatautomatically cleans its two cor

18-3. Toner Conveying/Collecting Mechanism . . . . . . . . . . . . . . . M-15218-4. Pre-Cleaning Erase Lamp LA5 ON/OFF Control. . . . . . . . . M-1541

<Control>•The PC Drum Charge corona wires are automatically cleaned under thefollowing conditions. The cleaning function is, however, disabled i

9-4. Ozone Filter•Ozone produced by the PC Drum Charge Corona is absorbed by theOzone Filter as the air is drawn out of the copier by Ventilation Fan

10OPTICAL SECTION•As the Scanner is moved by Scanner Motor M11, the light from ExposureLamp LA1 is reflected off the original and guided through the s

Part Name Symbol Function1 Scanner ReferencePosition SensorPC1 Provides the reference position for Scannermovement.2 Scanner Drive Cable(Rear)Driven b

10-2. Function of Exposure Components2Book3Original Glass1st Mirror65411. Auxiliary Reflector : Reflects light onto the areas that Exposure Lamp LA1ca

10-3. Exposure Lamp LA1 Control•The voltage applied to Exposure Lamp LA1 is controlled by changing theduty ratio of the pulse width of the Exposure La

(2) Auto Exposure Control<Overview>•The copier is provided with the Auto Exposure mode in which thevoltage applied to LA1 is automatically incre

With the copier set into the Auto Exposure mode (the Touch Panel showing"Auto Expo."), press the Start Key. Then, LA1 is turned ON at the ce

Touch the Exposure Control Key as necessary.(3) Manual Exposure Control•When either one of the Exposure Control Keys (Lighter or Darker) on theTouch P

1075C26MAA M-41

24-7. Leading Edge Guide Plate and Duplex Paper Take-Up Drive Mechanism/Control . . . . . . . . . . . . . . . . . . . . . . . . . . . M-19524-8. Duple

10-4. Intensity Correction(1) Because of the nature of the Lens, the intensity of the LA1 light afterpassing through the Lens tends to be higher at th

Scanner Drive Cable (Rear)10-5. Scanner and Mirrors Carriages Moving Mechanism<Scanner>•The Scanner projects an even amount of light from Exposu

<4th/5th Mirrors Carriage>•The 4th and 5th Mirrors are mounted to their holder at right angles toeach other. They function to let the light refl

10-6. Scanner Motor M11 Control<Overview>•A DC servomotor is used for Scanner Motor M11. The pulse widthmodulation, or PWM, control is employed

<Scanner Speed Control>•The speed of M11 is controlled by varying the width of the Scanner drivepulse output from Scanner Control Processor Boar

10-7. Lens Drive Mechanism/Control(1) Lens Drive Mechanism•In this copier, registration for the original is to one side, while the copypaper is fed th

◆Lens X Direction Reference Position ReturnFrom the enlargement side ( H ➡ L )➀ M12 is energized to move the Lens toward the reduction side anddeener

(3) Y (Crosswise) Direction Lens Motion Mechanism/ControlThe Lens must be moved in the Y-direction, since the original is alwaysaligned with the rear

➁◆ Lens Y Direction Reference Position ReturnThe movement of the Lens in the Y (crosswise) direction should be referredto as that in the plus (+) or m

1075C60MAA M-51

(ALL Areas)CAUTIONDanger of explosion if battery is incorrectly replaced.Replace only with the same or equivalent typerecommended by the manufacturer.

(4) Lens Movements in the X/Y-Direction◆ When Power Switch is turned ON(1) The Scanner is returned to the home position, if it is not there. It is at

10-8. Optical Section Cooling Fan Motor•Optical Section Cooling Fan Motor M17 draws air from the outside into theinside of the copier to cool the area

11ORIGINAL SIZE DETECTING SYSTEM•The conventional original size detecting system, which uses the intensity ofthe light reflected off the original as t

Name Symbol Function1 Size Reset Switch S7 Clears the preceding original size data.2Original Size DetectingSensor CD2 (option)UN7Detects the size of t

11-3. Original Detection Method•When the photo receiver receives the reflected light of the two LEDs at anintensity that exceeds a predetermined level

Each sensor has a built-in signal processing circuit that outputs 8-bit serialdata to Original Size Detecting Board UN2.PSDRegLED1LED2LEDDriveCircuitO

11-4. Sensor Locations•The number and location of the Original Size Detecting Sensors variesdepending on the marketing area, as given below.O: Standar

11-5. Original Size Detection•Original Size Detecting Board UN2 reads the output data provided by theoriginal size detecting sensors. By comparing the

11-6. Original Size Detection ProcessingThe copier performs different processing for the detection of the original sizeunder different copier conditio

11-7. Original Size Detection Circuit1075C22MAA M-61

2TECHNICAL HIGHLIGHTSThis copier has the following mechanical features.◆The original is aligned at the rear corner, while the copy paper is fedthrough

12-1. Image Erase Lamp LA3•Any areas of charge which are not to be developed along the leading,trailing, front, and rear edges are neutralized by ligh

12-2. Image Erase Lamp LA3 ON/OFF ControlLA3 is controlled by the following signals output from Master Board PWB-A.Signal NameSignalOutput PinFunction

12-3. Control for Each Erase Function<LA3 ON Start Timing>All LA3 LEDs are turned ON approx. 250 msec. after PC Drum Drive MotorM5 has been ener

= Edge Erase =•The 64 LEDs are turned ON and OFF as necessary to erase unnecessarycharges along both the front and rear edges of the image as well as

•In this copier, the original is aligned with a corner for registration, while thecopy paper is fed through the center of the copier. Because of that,

LED ON Pattern BO: ON; X: OFF (L1 to L32 are OFF)Zoom Ratio LEDsInch Area Metric Area L33 to L40 L41 to L48 L49 to L56 L57 to L64To 0.507 To 0.511 OO

= Trailing Edge Erase =•The image along the trailing edge of the electrostatic latent image on thesurface of the PC Drum is erased by turning ON all L

13DEVELOPING UNIT13-1. Construction•This copier employs the New Micro-Toning developing system equippedwith three Sleeve/Magnet Rollers.•The toner fed

13-2. Developing Unit Drive Mechanism•Drive for the Developing Unit comes from PC Drum Drive Motor M5.•Coupling Gear 2 is spring-loaded. If the protru

13-3. Developer FlowWhen drive from PC Drum Drive Motor M5 is transmitted, the DeveloperConveying/Agitating Screw, Bucket Roller, and Toner Replenishi

3SPECIFICATIONSTYPE :ConsolePLATEN : StationaryPHOTOCONDUCTOR : Organic PhotoconductorCOPYING SYSTEM : Electrostatic dry powdered image transfer to pl

From the Sub Hopper, an even amount of toner is supplied over the fulllength of the Bucket Roller by the Sub Hopper Toner ReplenishingRoller. (For det

Doctor BladeDeveloperDeveloperRegulatorSolid Line : Magnetic flux densityDotted Line : Magnetic attractionS1N1N3N1N1N2 S1N2S3S1S2S2N213-4. Magnetic Po

<Toner Replenishing Sleeve/Magnet Roller>N3, S2 : The developer fed by the Bucket Roller is attracted onto thesurface of the Sleeve Roller.N2 :

13-5. ATDC Sensor<ATDC Sensor>•ATDC Sensor UN8 is installed at the center of the DeveloperConveying/Agitating Screw on the underside of the Deve

Once the ATDC Sensor automatic adjustment is completed, varying T/C’smay be compared with the UN8 output voltages as follows.T/C UN8 OutputVoltageT/C

<Toner Replenishing Control by ATDC Sensor>•UN8 samples T/C at the following timings for each copy.Approx. 20 msec. after a HIGH BASE signal, wh

13-6. Control for Abnormally Low T/CAny of the following faulty conditions occurring during a copy cycle couldcause a steep drop in T/C, resulting in

= Toner Replenishing Sequence Performed When an Abnormally Low T/C is Detected =The ATDC Sensor output voltage applied to pin 80 of IC1A indicates ana

13-7. Sub Hopper Toner Replenishing Mechanism/Control<Toner Replenishing Mechanism>•Toner is replenished from the Sub Hopper when Sub Hopper Ton

<Toner Replenishing Control>•When the copier determines that toner replenishing is to be carried outbased on the ATDC output voltages, M15 is co