Kyocera PF-750 Service Manual
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Kyocera PF-750 Service Manual

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PF-750
SERVICE
MANUAL
Published in April 2007
845H0115
5H0SM065
Rev. 5

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Summary of Contents for Kyocera PF-750

  • Page 1: Service Manual

    PF-750 SERVICE MANUAL Published in April 2007 845H0115 5H0SM065 Rev. 5...
  • Page 2 CAUTION RISK OF EXPLOSION IF BATTERY IS REPLACED BY AN INCORRECT TYPE. DISPOSE OF USED BATTERIES ACCORDING TO THE INSTRUCTIONS. It may be illegal to dispose of this battery into the municipal waste stream. Check with your local solid waste officials for details in your area for proper disposal. ATTENTION IL Y A UN RISQUE D’EXPLOSION SI LA BATTERIE EST REMPLACEE PAR UN MODELE DE TYPE INCORRECT.

  • Page 3: Revision History

    Revision history Revision Date Replaced pages Remarks July 6, 2006 Contents, 1-3-1, 1-3-3, 1-3-4 August 11, 2006 Contents, 1-2-3, 1-4-1, 1-4-2, 1-4-3, 1-4-3-1, 1-4-3-2, 1-4-3-3, 1-4-6, 2-4-1 October 20, 2006 2-3-1, 2-3-3, 2-4-3 January 23, 2007 Contents, 1-2-1, 1-2-3, 1-2-4, 1-3-2 to 1-3-8, 1-4-4 to 1-4-10, 1-5-1, 2-1-2, 2-2-1, 2-2-3, 2-3-2, 2-3-4, 2-4-3 April 3, 2007...
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  • Page 5: Safety Precautions

    Safety precautions This booklet provides safety warnings and precautions for our service personnel to ensure the safety of their customers, their machines as well as themselves during maintenance activities. Service personnel are advised to read this booklet carefully to familiarize themselves with the warnings and precautions described here before engaging in maintenance activities.
  • Page 6 Safety warnings and precautions Various symbols are used to protect our service personnel and customers from physical danger and to prevent damage to their property. These symbols are described below: DANGER: High risk of serious bodily injury or death may result from insufficient attention to or incorrect compliance with warning messages using this symbol.

  • Page 7: Installation Precautions

    1.Installation Precautions WARNING • Do not use a power supply with a voltage other than that specified. Avoid multiple connections to one outlet: they may cause fire or electric shock. When using an extension cable, always check that it is adequate for the rated current....................•...
  • Page 8 2.Precautions for Maintenance WARNING • Always remove the power plug from the wall outlet before starting machine disassembly....• Always follow the procedures for maintenance described in the service manual and other related brochures............................• Under no circumstances attempt to bypass or disable safety features including safety mechanisms and protective circuits.
  • Page 9 • Do not remove the ozone filter, if any, from the copier except for routine replacement..... • Do not pull on the AC power cord or connector wires on high-voltage components when removing them; always hold the plug itself...................... •...
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  • Page 11: Table Of Contents

    5H0-4 CONTENTS 1-1 Specifications 1-1-1 Specifications............................1-1-1 1-1-2 Parts names............................1-1-2 1-1-3 Machine cross section ..........................1-1-3 1-2 Installation 1-2-1 Installation environment ..........................1-2-1 1-2-2 Unpacking ...............................1-2-2 1-2-3 Installing the cassette heaters (option) ....................1-2-3 1-3 Maintenance Mode 1-3-1 Maintenance mode (fullcolor machine) ....................1-3-1 (1) Executing a maintenance item ......................1-3-1 (2) Contents of maintenance mode items....................1-3-2 1-3-2 Maintenance mode (monochrome machine) ..................1-3-5 (1) Executing a maintenance item ......................1-3-5...
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  • Page 13: Specifications

    1-1 Specifications 1-1-1 Specifications Paper supply method...... Friction retard method (No. sheets: 3000, 80 g/m Paper size........11" x 8 ", A4 Supported paper ......Weight: 60 - 105 g/m Types: standard, recycled, color Power source........Electrically connected to the machine Dimensions ........

  • Page 14: Parts Names

    1-1-2 Parts names Figure 1-1-1 Lifts Left cover 3 Cassette 3 Cassette front cover Front and rear lateral size adjusters 1-1-2...

  • Page 15: Machine Cross Section

    1-1-3 Machine cross section Paper path Figure 1-1-2 Machine cross section 1-1-3...
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  • Page 17: Installation Environment

    5H0-4 1-2 Installation 1-2-1 Installation environment Installation location (Be based on the machine establishment place.) Avoid direct sunlight or bright lighting. Ensure that the photo-conductor will not be exposed to direct sunlight or other strong light when removing paper jams. Avoid extremes of temperature and humidity, abrupt ambient temperature changes, and hot or cold air directed onto the machine.

  • Page 18: Unpacking

    1-2-2 Unpacking Figure 1-2-1 Unpacking 3000-sheet paper feeder Pins Outer case 10. CVM4 x 06 cross-head Lower front pad binding screws Lower rear pad 11. M4 x 16 TP screws Support 12. Machine cover Upper pad 13. Plastic bag Stay 14.

  • Page 19: Installing The Cassette Heaters (Option)

    5H0-4 1-2-3 Installing the cassette heaters (option) Installing the cassette heater requires the following component: Two (2) cassette heaters (P/N 302FB25051): for 220 - 240 V specifications only Two (2) cassette heaters (P/N 302FB25060): for 120 V specifications only Two (2) cassette heater retainers (P/N 5A707690) Six (6) M4 x 6 IT tap-tight (S-tight) screws (P/N 37611570) Relay wire (P/N 5A707890) Ten (10) wire saddles (P/N M2109000)
  • Page 20 5H0-4 8. Insert the cassette heater connectors into the relay wire connectors. 9. Insert the main harness connector into the relay wire connector. 10. Tidy up the cassette heater cable and relay wire using eight wire saddles and route the cable and wire while clipping the wire sad- dles into the holes in the rear frame.

  • Page 21: Maintenance Mode

    5H0-1 1-3 Maintenance Mode 1-3-1 Maintenance mode (fullcolor machine) The machine is equipped with a maintenance function which can be used to maintain and service the machine. (1) Executing a maintenance item Start Enter 10871087 using Maintenance mode is entered. the numeric keys.

  • Page 22: Contents Of Maintenance Mode Items

    5H0-5 (2) Contents of maintenance mode items Maintenance Description item No. Adjusting the print start timing U034 Description Adjusts the leading edge registration or center line. Purpose Make the adjustment if there is a regular error between the leading edges of the copy image and original. Make the adjustment if there is a regular error between the center lines of the copy image and original.
  • Page 23 5H0-5 Maintenance Description item No. U034 5. Change the setting value using the cursor up/down keys. For output example 1, increase the value. For output example 2, decrease the value. Leading edge registration Correct image Output Output example 1 example 2 Figure 1-3-1 6.
  • Page 24 5H0-5 Maintenance Description item No. Caution U034 Check the copy image after the adjustment. If the image is still incorrect, perform the following adjustments in maintenance mode. U067 U072 (See the service manual (See the service manual U034 for the machine.) for the machine.) Completion Press the stop/clear key.

  • Page 25: Maintenance Mode (Monochrome Machine)

    5H0-4 1-3-2 Maintenance mode (monochrome machine) The machine is equipped with a maintenance function which can be used to maintain and service the machine. (1) Executing a maintenance item Start Press the status key. Enter “10871087” using Maintenance mode is entered. the numeric keys.

  • Page 26: Contents Of Maintenance Mode Items

    5H0-4 (2) Contents of maintenance mode items Maintenance Description item No. Adjusting the print start timing U034 Description Adjusts the leading edge registration or center line. Purpose Make the adjustment if there is a regular error between the leading edges of the copy image and original. Make the adjustment if there is a regular error between the center lines of the copy image and original.
  • Page 27 5H0-4 Maintenance Description item No. Adjustment: center line adjustment U034 1. Select the item to be adjusted. Display Description Setting Initial Change in range setting value per step LEFT Adjustment of reference value 0 to 1000 1.0 mm MP TRAY Paper feed from MP tray* -500 to 500 1.0 mm...
  • Page 28 5H0-4 Maintenance Description item No. Setting the paper size for the paper feeder U208 Description Sets the size of paper used in optional 3000-sheet paper feeder. Purpose To change the setting when the size of paper used in the paper feeder is changed. Setting 1.

  • Page 29: Paper Misfeed Detection

    5H0-5 1-4 Troubleshooting 1-4-1 Paper misfeed detection (1) Paper misfeed indication When a paper misfeed occurs, the machine immediately stops copying and displays the jam location on the operation panel. Paper misfeed detection can be reset by opening and closing the left cover 3 to turn left cover 3 switch off and on. (2) Paper misfeed detection conditions FSW3 PFPFCL1...
  • Page 30 5H0-2 Monochrome machine Section Jam code Conditions Specified time Paper Feed switch 3 (FSW3) does not turn on within the specified 2044 ms feed No paper feed from cas- time of paper feeder paper feed clutch 1 (PFPFCL1) turning (30 ppm)/ section sette 3 on;...

  • Page 31: Paper Misfeeds (Fullcolor Machine)

    5H0-2 (3) Paper misfeeds (fullcolor machine) Problem Causes/check procedures Corrective measures Paper is extremely curled. Change the paper. A paper jam in the Broken feed switch 3 actua- Check visually and replace switch. paper feed section is tor. indicated during copying (no paper Defective feed switch 3.
  • Page 32 5H0-4 Problem Causes/check procedures Corrective measures Check if the paper side Check visually and replace. A paper jam in the guides are deformed. paper feed section is Defective paper path sen- With 5 V DC present at CN6-6 on the paper feeder main PWB, indicated during sor 1.

  • Page 33: Paper Misfeeds (Monochrome Machine)

    5H0-4 (4) Paper misfeeds (monochrome machine) Problem Causes/check procedures Corrective measures Paper is extremely curled. Change the paper. A paper jam in the Broken feed switch 3 actua- Check visually and replace switch. paper feed section is tor. indicated during copying (no paper Defective feed switch 3.
  • Page 34 5H0-4 Problem Causes/check procedures Corrective measures Paper is extremely curled. Change the paper. A paper jam in the Check if the paper side Check visually and replace. paper feed section is guides are deformed. indicated during copying (jam in 3000- Defective paper path sen- With 5 V DC present at CN6-6 on the paper feeder main PWB, sheet paper feeder...

  • Page 35: Self-Diagnosis

    5H0-4 1-4-2 Self-diagnosis (1) Self-diagnostic function This unit is equipped with a self-diagnostic function. When a problem is detected, copying is disabled and the problem dis- played as a code consisting of C followed by a number, indicating the nature of the problem. A message is also displayed requesting the user to call for service.
  • Page 36 5H0-4 Remarks Code Contents Causes Check procedures/corrective measures C1130 Paper feeder right lift position prob- Poor contact in the Check the connection of connector on the connector termi- engine PWB and the connector on the paper Paper feeder switch 1 does not turn on nals.

  • Page 37: Electric Problems

    5H0-4 1-4-3 Electric problems Troubleshooting to each failure must be in the order of the numbered symptoms. Problem Causes Check procedures/corrective measures 1. Poor contact in the con- Reinsert the connector. Also check for continuity within the con- The paper feeder nector terminals.

  • Page 38: Mechanical Problems

    5H0-4 1-4-4 Mechanical problems Problem Causes/check procedures Corrective measures Check if the paper feeder separation roller 1 Clean with isopropyl alcohol. No primary paper feed. or 2 is soiled with paper powder. Check if paper feeder paper feed roller 1 or 2 Clean with isopropyl alcohol.

  • Page 39: Assembly And Disassembly

    5H0-4 1-5 Assembly and Disassembly 1-5-1 Precautions for assembly and disassembly (1) Precautions Before starting disassembly, press the Power key on the operation panel to off. Make sure that the Power lamp is off before turning off the main power switch. And then unplug the power cable from the wall outlet. Turning off the main power switch before pressing the Power key to off may cause damage to the equipped hard disk.

  • Page 40: Paper Feed Section

    1-5-2 Paper feed section (1) Detaching and refitting paper feeder separation roller 1 and 2 Clean or replace paper feeder separation roller 1, 2 as follows. Procedure 1. Open left cover 3. 2. Remove stop ring 1. 3. Remove the shaft. 4.

  • Page 41: Detaching And Refitting The Paper Feeder Paper Conveying Unit Assembly

    (2) Detaching and refitting the paper feeder paper conveying unit assembly Replace the desk upper or lower paper width switches as follows. Procedure 1. Open the cassette. 2. Remove left cover 3. 3. Remove two screws holding the paper feeder paper conveying unit assembly and then the assembly.

  • Page 42: Adjusting The Position Of The Center Adjuster (Center Line Alignment)

    (4) Adjusting the position of the center adjuster (center line alignment) Perform the following adjustment if the center lines of the copy image and the copy paper are misaligned. Procedure 1. Connect the power plug to the wall outlet and turn the main power switch on. 2.

  • Page 43: Mechanical Construction

    2-1 Mechanical construction 2-1-1 Mechanical construction The paper feeder consists mainly of the left and right cassettes and separation section. The left cassette paper feed section sends paper from the lift to paper feeder separation rollers 1 and 2. When the left cas- sette becomes empty, the right cassette paper feed section conveys paper onto the lift of the left cassette.
  • Page 44 5H0-4 Left cassette paper feed As the paper feeder paper conveying clutch (PFCCL) and paper feeder separation clutch (PFSCL) turns on, the drive is transmitted to paper feeder separation rollers 1 and 2, starting paper feed from the left cassette. The paper feeder separation rollers 1 and 2 ensure that the paper is fed one sheet at a time and that it is fed into the machine correctly.
  • Page 45 Right cassette paper feed As the last sheet in the left cassette is fed, paper feeder paper feed clutch 2 (PFPFCL2) and paper feeder paper feed clutch 1 (PFPFCL1) turn on for paper feed from the right cassette. Paper feeder paper feed rollers 1 and 2 start to rotate to convey paper from the right cassette onto the left cassette lift.
  • Page 46 Raising and lowering the lifts The following is a description of the right cassette lift operating mechanism. The left cassette lift operates in the same manner. Lift motor 2 (LM2) drives the right lift belt assembly that winches the belt up and hence raises the lift until it is stopped by level switch 2 (LSW2).
  • Page 47 Detecting the paper level The lift rises as paper in the cassette is used. When the remaining number of sheets in either right or left cassette reduces to around 100 to 250 sheets, the projection on the lift belt assembly pushes against the sensor lever which turns the relevant paper level detection sensor 1 or 2 (PLDSENS1/2) on.
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  • Page 49: Electrical Parts Layout

    5H0-4 2-2 Electrical Parts Layout 2-2-1 Electrical parts layout (1) PWBs Machine front Machine inside Machine rear Figure 2-2-1 PWBs Paper feeder main PWB (PFMPWB) ... Controls electrical components and communications with the machine. Sensor relay PWB (SENRYPWB)....Distributes the power source to the level switch1 and paper feeder open/ closed safety switch.

  • Page 50: Switches And Sensors

    (2) Switches and sensors Machine front Machine inside Machine rear Figure 2-2-2 Switches and sensors Paper path sensor 1 (PPSENS1)....Detect paper jams and the absence of paper on the lifts. Paper path sensor 2 (PPSENS2)....Detect paper jams and the absence of paper on the lifts. Paper path sensor 3 (PPSENS3)....

  • Page 51: Other Electrical Components

    5H0-4 (3) Other electrical components Machine front Machine inside Machine rear Figure 2-2-3 Other electrical components Paper feeder paper conveying clutch (PFCCL)............Regulates drive transmission to paper feeder separation rollers 1 and 2. Paper feeder paper feed clutch 1 (PFPFCL1)........... Regulates drive transmission to paper feeder paper feed roller 1. Paper feeder paper feed clutch 2 (PFPFCL2)...........
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  • Page 53: Paper Feeder Main Pwb

    5H0-3 2-3 Operation of the PWBs 2-3-1 Paper feeder main PWB Serial communication Communication signal circuit Latch From the machine PFSCL Paper feeder paper PFCM conveying motor drive PFCCL circuit (IC8) Clutch drive circuit PFPFCL2 drive circuit PFPFCL1 drive circuit drive circuit PPSENS1 PPSENS2...
  • Page 54 5H0-4 Figure 2-3-2 Paper feeder main PWB silk-screen diagram 2-3-2...
  • Page 55 5H0-3 Connector Pin No. Signal Voltage Description FEED SW SIG 0/5 V DC FSW3 On/Off signal from the machine Connected READY 0/5 V DC Ready signal to the machine to the SDO(IN) 0/5 V DC Serial communication signal from the machine machine (pulse) SDI(OUT)
  • Page 56 5H0-4 Connector Pin No. Signal Voltage Description SIDE_COVER 5/0 V DC LC3SW: On/Off Connected SGND Signal ground to the paper DC5V 5 V DC 5 V DC supply for LC3SW path sensor PPS0_CLK 5/4 V DC PPSENS1 clock signal 1/2/3 and (pulse) paper empty sensor...

  • Page 57: List Of Maintenance Parts

    5H0-2 2-4 Appendixes List of maintenance parts Maintenance part name Alternative Fig. Ref. Part No. part No. Name used in service manual Name used in parts list Paper feed roller 1/2 H-PICK ROLLER 5A707600 Paper feeder separation roller 1 PULLEY,PAPER FEED 5FH06010 Paper feeder separation roller 2 PULLEY,SEPARATION...
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  • Page 59: Wiring Diagram

    5H0-4 Wiring diagram Machine Wire color Mark PFCH1 PFCH2 Brown PFPFCL2 Yellow Blue White 9 10 11 12 Orange Light blue PFPFCL1 Gray Black Purple 10 9 PFCCL 10 9 P2_CL DC24V P1_CL PFSCL DC24V B_CL DC24V PFCM B_CL PFOSSW DC24V MOT_ON DC24V...

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