Ricoh Pro C651EX Replacement Manual
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Ricoh Pro C651EX Replacement Manual

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Replacement Guide: TCRU
Model Name:
Pro C651EX/Pro C751EX/Pro C751
Read this manual carefully before using this machine and keep it handy for future reference.
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Summary of Contents for Ricoh Pro C651EX

  • Page 1 Replacement Guide: TCRU Model Name: Pro C651EX/Pro C751EX/Pro C751 Read this manual carefully before using this machine and keep it handy for future reference.

  • Page 2: How To Read This Manual

    How to Read This Manual Introduction This manual contains detailed instructions and notes on the operation and use of this machine. For your safety and benefit, read this manual carefully before using the machine. Keep this manual in a handy place for quick reference. Symbols This manual uses the following symbols: WARNING...
  • Page 3 Important • In no event will the company be liable for direct, indirect, special, incidental, or consequential damages as a result of handling or operating the machine. • The manufacturer shall not be responsible for any damage or expense that might result from use of other than genuine parts from the manufacturer with your office products.
  • Page 4 Power Switch Symbols Where symbols are used on or near switches on machines for Europe and other areas, the meaning of each symbol conforms with IEC60417. STANDBY Power Plug and Power Cord 1. Always make sure that the power plug is fully completely into the wall outlet. A partially inserted plug could lead to heat generation (due to a power surge caused by high resistance) that can result in fire and other problems.

  • Page 5: Safety Information

    Safety Information When using this machine, the following safety precautions should always be followed. Safety Precautions to be Followed These are safety precautions that should always be followed when using this machine. Environments where the machine can be used These are safety precautions about environments where the machine can be used. WARNING •...
  • Page 6 Handling the machine's interior These are safety precautions about handling the machine's interior. WARNING • Do not allow paper clips, staples, or other small metallic objects to fall inside the machine. • The inside of this machine gets very hot. Do not touch the parts with a label indicating a “hot surface”.
  • Page 7 SAFETY AND ECOLOGICAL NOTES FOR DISPOSAL 1. Do not incinerate toner bottles or used toner. Toner dust may ignite suddenly when exposed to an open flame. 2. Dispose of used toner and organic photoconductors in accordance with local regulations. (These are non-toxic supplies.) 3.

  • Page 8: Table Of Contents

    Table of Contents How to Read This Manual ................... 2 Safety Information ....................5 1. Before You Begin................10 What You Need ..................10 Parts and Screw Color Codes ..............11 Names of Components ................12 Control Panel .................... 13 Power Off Sequence................. 14 Specifying System Auto-Reset Timer ............
  • Page 9 8. Periodic Cleaning .................89 Fusing Belt Stripper and Pressure Roller Stripper Plates ......90 Entrance Guide Plate................93 Dust Catcher..................... 94 9. Roller and Sensor Inspection and Cleaning.......98 Overview....................99 Inspection and Cleaning ................99...

  • Page 10: Before You Begin

    1. Before You Begin This manual is only for operators who have received proper training. General users are not to perform the procedures shown in this manual. • Never perform any procedure in this manual if you have not received proper training.

  • Page 11: Parts And Screw Color Codes

    1.2 Parts and Screw Color Codes • Purple handles and levers are for use when pulling or lifting parts in order to move or remove them. Purple labels on parts indicate exactly where to hold such parts when pulling or lifting them. •...

  • Page 12: Names Of Components

    1.3 Names of Components CEZ223 1. Main power switch 2. Photoconductor and Development Units (PCDUs) 3. Control panel 4. Front left cover 5. Left drawer (Fusing unit) 6. Inner cover (Cleaning unit for intermediate transfer belt) 7. Right drawer (Transfer unit) 8.

  • Page 13: Control Panel

    1.4 Control Panel Pro C651EX/Pro C751EX CEZ702 Pro C751 CEZ703 1. Number keys 2. Operation switch 3. User Tools key 4. Counter key 5. Start key 6. Data in indicator...

  • Page 14: Power Off Sequence

    1.5 Power Off Sequence WARNING • To avoid electrical shock and possible injury, always turn off the system and unplug the power cord from its power source before doing any procedure that is described in this manual. 1. Check that the data in indicator on the main machine's control panel is not flashing.

  • Page 15: Preparation

    1.7 Preparation • Spread some paper or a drop cloth in front of the machine before removing any parts. • The cloth or paper will catch small amounts of toner or shreds of dry lubricant that may fall out of the PCUs when they are removed. CEZ129...

  • Page 16: Displaying The [Adjustment Settings For Skilled Operators] Button

    1.8 Displaying the [Adjustment Settings for Skilled Operators] Button To use the Adjustment Settings for Skilled Operators menu, you must first configure your machine's Administrator Authentication Management setting. 1. Press the [User Tools] key on the control panel. CEZ700 2. Press [System Settings] on the display. 3.
  • Page 17 5. Press [Administrator Authentication Management]. 6. Press [Machine Management]. 7. Select [On] for "Admin. Authentication". 8. Press [OK]. 9. Press [Exit]. The [Adjustment Settings for Skilled Operators] button appears.

  • Page 18: Accessing The Adjustment Settings For Skilled Operators

    1.9 Accessing the Adjustment Settings for Skilled Operators 1. Press [Adjustment Settings for Skilled Operators]. If the [Adjustment Settings for Skilled Operators] button does not appear, follow the procedure under "Displaying the [Adjustment Settings for Skilled Operators] Button" on p.16. 2.
  • Page 19 4. Enter your login password, and then press [OK]. The screen appears for Adjustment Settings for Skilled Operators.

  • Page 20: Resetting The Replaceable Parts Counter

    1.10 Resetting the Replaceable Parts Counter Reset the counter for replaceable parts. After you have replaced a unit, reset the counter for the unit. 1. Access the Adjustment Settings for Skilled Operators menu. 2. Press [ Next]. 3. Press [0305: Reset Replaceable Parts Counter]. 4.

  • Page 21: Replacing The Paper Feed Rollers

    2. Replacing the Paper Feed Rollers 2.1 Before You Begin Read this section before replacing any paper feed rollers. 2.1.1 Tray Names The main machine's paper feed trays and wide Large Capacity Trays (wide LCTs) are occasionally referred to by number. CEZ101 •...
  • Page 22 2.1.2 Position of the paper feed rollers • Main machine (Trays 1 and 2) CEZ178 • Wide LCT and multi bypass tray (Trays 3-6) CEZ179...
  • Page 23 2.1.3 Roller Names Main Machine (Tray 1, 2) Multi Bypass Tray (Tray 6) cez182 cez186 Wide LCT (Tray 3-5) cez185 There are three rollers: (A) Pick-up roller Pulls the paper out of the tray and feeds it to the feed roller. (B) Feed roller Feeds the paper from the tray into the paper path.
  • Page 24 WARNING • To prevent electrical shock, turn off the color controller on the machine control panel, turn off the operation power switch and then the main power switch, and then disconnect the machine from the power supply before replacing any parts or cleaning the machine's interior. •...

  • Page 25: Replacing The Rollers In The Main Machine

    2.2 Replacing the Rollers in the Main Machine 2.2.1 Removing the Rollers: Tray 1, Tray 2 Follow this procedure to replace the paper feed rollers in Tray 1 and Tray 2 (top and bottom trays of the main machine). CEZ102 1.
  • Page 26 5. Remove the paper feed roller in the following order: (1) Pick-up roller snap ring and roller (2) Feed roller snap ring and roller (3) Separation snap ring and roller CEZ211...
  • Page 27 2.2.2 Installing the Rollers: Tray 1, Tray 2 1. Attach the new paper feed roller in the following order: (1) Separation snap ring and roller (2) Feed roller snap ring and roller (3) Pick-up roller snap ring and roller CEZ212 2.

  • Page 28: Replacing The Rollers In The Wide Lct Top Tray (Tray 3)

    2.3 Replacing the Rollers in the Wide LCT Top Tray (Tray 2.3.1 Removing the Rollers: Top Tray (Tray 3) CEZ104 1. Open the wide LCT front cover. 2. Pull open the top tray (Tray 3) until it stops. If there is any paper in the tray, remove it.
  • Page 29 4. Remove the two black screws on the paper feed unit U2, and then pull out the paper feed unit U2 until it stops. CEZ204 5. Push the tray partially into the wide LCT. 6. Remove the black screw on the bracket. cez180 7.
  • Page 30 2.3.2 Installing the Rollers: Top Tray (Tray 3) 1. Attach the new paper feed roller in the following order: (1) Separation snap ring and roller (2) Feed roller snap ring and roller (3) Pick-up roller snap ring and roller CEZ184 2.
  • Page 31 5. Align the markers at (1) and (2). CEZ210 6. Use two black screws to reattach the side plate. 7. Push the top tray (Tray 3) back inside the machine. 8. Close the wide LCT front cover. 9. Turn on the main machine and wait for the machine to warm up. 10.

  • Page 32: Replacing The Rollers In The Wide Lct Middle Tray (Tray 4)

    2.4 Replacing the Rollers in the Wide LCT Middle Tray (Tray 4) 2.4.1 Removing the Rollers: Middle Tray (Tray 4) CEZ105 1. Open the wide LCT front cover. 2. Pull open the middle tray (Tray 4) until it stops. If there is any paper in the tray, remove it.
  • Page 33 4. Remove the two black screws on the paper feed unit U4, and then pull out the paper feed unit U4 until it stops. CEZ205 5. Push the tray partially into the wide LCT. 6. Remove the black screw on the bracket. cez180 7.
  • Page 34 2.4.2 Installing the Rollers: Middle Tray (Tray 4) 1. Attach the new paper feed roller in the following order: (1) Separation snap ring and roller (2) Feed roller snap ring and roller (3) Pick-up roller snap ring and roller CEZ184 2.
  • Page 35 5. Align the markers at (1) and (2). CEZ210 6. Use two black screws to reattach the side plate. 7. Push the middle tray (Tray 4) back inside the machine. 8. Close the wide LCT front cover. 9. Turn on the main machine and wait for the machine to warm up. 10.

  • Page 36: Replacing The Rollers In The Wide Lct Bottom Tray (Tray 5)

    2.5 Replacing the Rollers in the Wide LCT Bottom Tray (Tray 5) 2.5.1 Removing the Rollers: Bottom Tray (Tray 5) CEZ106 1. Open the wide LCT front cover. 2. Pull open the bottom tray (Tray 5) until it stops. If there is any paper in the tray, remove it.
  • Page 37 4. Remove the two black screws on the side plate then remove the plate. CEZ203 5. Remove the two black screws on the paper feed unit U6, and then pull out the paper feed unit U6. CEZ206 6. Push the tray partially into the wide LCT. 7.
  • Page 38 9. Remove the paper feed roller in the following order: (1) Pick-up roller snap ring and roller (2) Feed roller snap ring and roller (3) Separation snap ring and roller CEZ213...
  • Page 39 2.5.2 Installing the Rollers: Bottom Tray (Tray 5) 1. Attach the new paper feed roller in the following order: (1) Separation snap ring and roller (2) Feed roller snap ring and roller (3) Pick-up roller snap ring and roller CEZ184 2.
  • Page 40 5. Align the markers at (1) and (2). CEZ210 6. Use two black screws to reattach the side plate. 7. Push the bottom tray (Tray 5) back inside the machine. 8. Reattach the tab fence, and then close the wide LCT front cover. 9.

  • Page 41: Replacing The Rollers In The Multi Bypass Tray (Tray 6)

    2.6 Replacing the Rollers in the Multi Bypass Tray (Tray CEZ224 The bypass feed rollers can be accessed from the top of the wide LCT. 2.6.1 Removing the Rollers: Multi Bypass Tray (Tray 6) Note: The rollers are behind the snap-off cover. CEZ167...
  • Page 42 1. Pull off the snap-off cover. CEZ168 2. Remove the black screw. CEZ169 3. Remove the plate. CEZ170...
  • Page 43 4. Remove the black screw on the sensor positioning plate. CEZ171 5. Push the sensor positioning plate to the left. Note: If this plate is not pushed to the left, you will not be able to remove the paper feed roller. 6.
  • Page 44 2.6.2 Installing the Rollers: Multi bypass Tray (Tray 6) 1. Attach the new paper feed roller in the following order: (1) Separation snap ring and roller (2) Feed roller snap ring and roller (3) Pick-up roller snap ring and roller CEZ174 Note: Avoid touching the surfaces of the new rollers with bare fingers.
  • Page 45 3. Reattach the plate. Check the sides of the plate and make sure that the tabs fit correctly at (A) and (B). CEZ175 4. Fasten the plate with the black screw. CEZ176 5. Reattach the snap-off cover. CEZ177 6. Turn on the main machine and wait for the machine to warm up. 7.

  • Page 46: Charge Roller Unit And Cleaning Unit For Pcu

    3. Charge Roller Unit and Cleaning Unit for PCU What You Need • Accessory hex screwdriver provided with the machine. • A drop cloth, newspaper, or other paper to spread in front of the machine and to cover a nearby flat surface on which you can place the removed components. WARNING •...

  • Page 47: Removing The Charge Roller Unit And Cleaning Unit For Pcu

    3.1 Removing the Charge Roller Unit and Cleaning Unit for PCU Note: The charge roller unit and cleaning unit for PCU are in the Photoconductor and Development Unit (PCDU). 1. Make sure that the system is turned off and the machine power cord is disconnected from the power source.
  • Page 48 5. If you are replacing the units for yellow or magenta, proceed to Step 7. If you are replacing the units for cyan or black, remove the two black screws on the ITB release lever cover, and then remove the cover. CEZ151 6.
  • Page 49 8. Push the lever to the rear (1) to release it, and then pull up the lever (2). CEZ111 9. Holding the ends of the charge roller unit where the purple labels are, lift the end of the unit facing the front of the machine and remove the unit. CEZ112 10.
  • Page 50 11. Turn the lock lever down to unlock the cleaning unit. CEZ113 12. Holding the ends of the cleaning unit for PCU where the purple labels are, rotate the unit slightly to the right and lift it out. CEZ131...

  • Page 51: Installing The Charge Roller Unit And Cleaning Unit For Pcu

    3.2 Installing the Charge Roller Unit and Cleaning Unit for PCU 1. Holding the ends of the cleaning unit for PCU where the purple labels are, attach the unit so that the triangular marks on it match up with those at the bottom of the PCDU.
  • Page 52 4. Hold the drum handle at both ends and pull it down. CEZ218 5. Holding the ends of the charge roller unit where the purple labels are, connect the end of the unit that will face the rear of the machine with the lug, and then lower the unit so that the notch in the other end connects with the lug.
  • Page 53 7. Push the PCDU in until the lock lever clicks and pops up. CEZ152A (1) Locked (2) Unlocked Important: • Do not forcefully push in the PCDU. Doing so may cause damage or toner spillage • If the PCDU’s lock lever does not work, then the joint on the inner side of the photoconductor may not be properly engaged.
  • Page 54 10. Pull up the ITB release lever. CEZ115 11. Reconnect the power cord to the power source. 12. Turn the machine's main power switch to ON, close the left and right front covers, and then wait for the machine to warm up. 13.

  • Page 55: Drum Unit

    4. Drum Unit What You Need • Accessory hex screwdriver provided with the machine. • A drop cloth, newspaper, or other paper to spread in front of the machine and to cover a nearby flat surface on which you can place the removed components. WARNING •...

  • Page 56: Removing The Drum Unit

    4.1 Removing the Drum Unit Note: The drum unit is in the Photoconductor and Development Unit (PCDU). 1. Make sure that the system is turned off and the machine power cord is disconnected from the power source. 2. Spread a drop cloth or some paper in front of the machine. 3.
  • Page 57 5. If you are replacing the units for yellow or magenta, proceed to Step 7. If you are replacing the units for cyan or black, remove the two black screws on the ITB release lever cover, and then remove the cover. CEZ151 6.
  • Page 58 8. Push the lever to the rear (1) to release it, and then pull up the lever (2). CEZ111 9. Holding the ends of the charge roller unit where the purple labels are, lift the end of the unit facing the front of the machine and remove the unit. CEZ112 10.
  • Page 59 11. Pull up the drum handle. CEZ130 12. Turn the lock lever counterclockwise to unlock the cleaning unit. CEZ113 13. Holding the ends of the cleaning unit for PCU where the purple labels are, rotate the unit slightly to the right and lift it out. CEZ131...
  • Page 60 14. Place the cleaning unit for PCU down with its open end up to prevent toner spillage. CEZ154 15. Make sure that the lock lever is up. CEZ155 16. Grasp both ends of the handle and lift the drum out. CEZ136...

  • Page 61: Installing The Drum Unit

    4.2 Installing the Drum Unit Important: • The drum unit is sensitive to light. • Install the drum immediately after removing it from its package. 1. Remove the new drum from its package. 2. Make sure that the lock lever (A) is up. CEZ165 3.
  • Page 62 4. Using the setting powder pad applicator, apply setting powder to the part of the drum surface facing upward (the part that is visible) until it becomes speckled with powder. CEZ518 Important: • The setting powder is an inert substance that is not harmful to the human body.
  • Page 63 8. Hold the drum handle at both ends and pull it down. CEZ309 9. Holding the ends of the cleaning unit for PCU where the purple labels are, attach the unit so that the triangular marks on it match up with those at the bottom of the PCDU.
  • Page 64 11. Pull up the lock lever to lock the cleaning unit for PCU. CEZ114 12. Holding the ends of the charge roller unit where the purple labels are, connect the end of the unit that will face the rear of the machine with the lug, and then lower the unit so that the notch in the other end connects with the lug.
  • Page 65 14. Push the PCDU in until the lock lever clicks and pops up. CEZ152A (1) Locked (2) Unlocked Important: • Do not forcefully push in the PCDU. Doing so may cause damage or toner spillage • If the PCDU’s lock lever does not work, then the joint on the inner side of the photoconductor may not be properly engaged.
  • Page 66 17. Pull up the ITB release lever. CEZ115 18. Reconnect the power cord to the power source. 19. Turn the machine's main power switch to ON, close the left and right front covers, and then wait for the machine to warm up. 20.

  • Page 67: Cleaning Unit For Intermediate Transfer Belt

    5. Cleaning Unit for Intermediate Transfer Belt What You Need • Accessory hex screwdriver provided with the machine. • A drop cloth, newspaper, or other paper to spread in front of the machine and to cover a nearby flat surface on which you can place the removed components. WARNING •...

  • Page 68: Removing The Cleaning Unit For Intermediate Transfer Belt

    5.1 Removing the Cleaning Unit for Intermediate Transfer Belt 1. Make sure that the system is turned off and the machine power cord is disconnected from the power source. 2. Spread a drop cloth or some paper in front of the machine. 3.
  • Page 69 5. Pull up both levers. SEZ156 6. Remove the black screw. SEZ157 7. Using the handle, carefully pull the cleaning unit for intermediate transfer belt toward you until it can go no further. CEZ159...
  • Page 70 8. While pressing the lock tab, carefully pull out the cleaning unit for intermediate transfer belt. SEZ160 9. Pull down the lever C1, and then pull the left drawer out completely until it stops. CEZ124...
  • Page 71 10. Use a dry cloth to clean the transport belt unit. Be careful to avoid the paper transport belt sensor when you do this. To clean the sensor, use a blower brush. CEZ225 11. Push the left drawer slowly into the machine until it stops, and then pull up the lever C1.

  • Page 72: Installing The Cleaning Unit For Intermediate Transfer Belt

    5.2 Installing the Cleaning Unit for Intermediate Transfer Belt 1. Mount the cleaning unit for intermediate transfer belt (A) on its rails (B), and then carefully push it in until it can go no further. CEZ118 2. Reattach the black screw. CEZ166 Note: Do not touch the levers and do not reattach the cover yet.
  • Page 73 9. Open the right front door and, on the Adjustment Settings for Skilled Operators menu, press [0303: ITB Manual Lubrication]. 10. Press [OK] and close the right door. Wait for the operation to finish. This operation takes about five minutes during which time a message appears on the control panel.
  • Page 74 15. Lower the lever B5 and pull out the right drawer until it stops. CEZ121 16. Reattach the transfer unit. (See p.78 "Installing the Transfer Unit".)

  • Page 75: Transfer Unit

    6. Transfer Unit What You Need • Accessory hex screwdriver provided with the machine. • A drop cloth, newspaper, or other paper to spread in front of the machine and to cover a nearby flat surface on which you can place the removed components. WARNING •...

  • Page 76: Removing The Transfer Unit

    6.1 Removing the Transfer Unit 1. Make sure that the system is turned off and the machine power cord is disconnected from the power source. 2. Spread a drop cloth or some paper in front of the machine. 3. Open the left and right front covers. The transfer unit is located on the right drawer.
  • Page 77 5. Remove the two black screws. CEZ139 6. Push both arm supports toward the center until they stop. CEZ140 7. Grip both ends of the unit by the metal handles, and then rotate the unit toward you to disconnect it from the shaft below and remove it. CEZ187 Important: •...

  • Page 78: Installing The Transfer Unit

    6.2 Installing the Transfer Unit 1. Hold the unit with the keyhole supports on both ends of the unit over the shaft, and then rotate it slightly forward. CEZ141 2. Push both support arms outwards until they stop. CEZ142...
  • Page 79 3. Reattach both black screws. CEZ143 4. Turn the gears to check that they rotate freely. CEZ217 5. Push the right drawer into the main unit until it stops, and then pull up the lever CEZ122 6. Reconnect the power cord to the power source. 7.
  • Page 80 8. Access the Adjustment Settings for Skilled Operators menu. (See p.18 "Accessing the Adjustment Settings for Skilled Operators".) 9. Reset the replaceable parts counter for the replaced transfer unit. (See p.20 "Resetting the Replaceable Parts Counter".)

  • Page 81: Fusing Unit And Cleaning Unit For Fusing Unit

    7. Fusing Unit and Cleaning Unit for Fusing Unit What You Need • Accessory hex screwdriver provided with the machine. • A drop cloth, newspaper, or other paper to spread in front of the machine and to cover a nearby flat surface on which you can place the removed components. WARNING •...

  • Page 82: Removing The Fusing Unit And The Cleaning Unit For Fusing Unit

    7.1 Removing the Fusing Unit and the Cleaning Unit for Fusing Unit 1. Make sure that the system is turned off and the machine power cord is disconnected from the power source. 2. Spread a drop cloth or some paper in front of the machine. 3.
  • Page 83 6. Remove the black screw (A), and then push the lock lever to the right (B). CEZ125 7. Pull up the cover D3. CEZ126 8. Pull up the handle (A) and grip the front of the fusing unit (B). CEZ144 Note: The fusing unit weighs about 17 kg (37 lb.).
  • Page 84 9. Lift the fusing unit out of the left drawer and place it on a flat clean surface. CEZ221 Note: Placing the fusing unit on a table makes it easier to replace the cleaning unit for fusing unit. 10. Place the fusing unit so the cleaning unit for fusing unit (A) faces you. CEZ145...
  • Page 85 11. Remove the black screw. CEZ146 12. Move the plastic-capped lever to the left. The cleaning unit for fusing unit will pop out slightly. CEZ147 13. Push the unit slightly to the left to disconnect the shafts on the right, then pull it out of the fusing unit.

  • Page 86: Installing The Fusing Unit And Cleaning Unit For Fusing Unit

    7.2 Installing the Fusing Unit and Cleaning Unit for Fusing Unit 1. Insert the two shafts into the holes on the right (A). CEZ161 2. Lower the left end over the lever and onto the positioning pin. 3. Make sure that the left-end plate is flat around the positioning pin (B). 4.
  • Page 87 5. Place the fusing unit on the left drawer with the triangular markings aligned as shown. CEZ149 6. On the front of the left drawer, push the lock lever (A) to the left, and then reattach the black screw (B). CEZ150...
  • Page 88 7. Lower the cover D3. CEZ127 8. Push the left drawer slowly into the machine until it stops, and then pull up the lever C1. CEZ128 Important: • Never force the left drawer into the machine if you feel any resistance. If you feel resistance, stop pushing and pull the left drawer out again.

  • Page 89: Periodic Cleaning

    8. Periodic Cleaning What You Need • Accessory hex screwdriver provided with the machine. • A drop cloth, newspaper, or other paper to spread in front of the machine and to cover a nearby flat surface on which you can place the removed components. •...

  • Page 90: Fusing Belt Stripper And Pressure Roller Stripper Plates

    8.1 Fusing Belt Stripper and Pressure Roller Stripper Plates 1. Make sure that the system is turned off and the machine power cord is disconnected from the power source. 2. Open the left and right front covers. The fusing belt stripper and pressure roller stripper plates are located on the left drawer unit.
  • Page 91 4. Open the cover D2 on top of the fusing unit. CEZ188 5. Use a dry cloth to clean the stripper plate on the fusing belt. CEZ189 6. Use a dry cloth to clean the stripper plate on the pressure roller. CEZ193 7.
  • Page 92 8. Push the left drawer slowly into the machine until it stops, and then pull up the lever C1. CEZ128 9. Reconnect the power cord to the power source. 10. Turn the machine's main power switch to ON, close the left and right front covers, and then wait for the machine to warm up.

  • Page 93: Entrance Guide Plate

    8.2 Entrance Guide Plate 1. Remove the fusing unit from the machine. For details about removing the fusing unit, see p.82 "Removing the Fusing Unit and the Cleaning Unit for Fusing Unit". 2. Use a dry cloth to clean the entrance guide plate. CEZ194 3.

  • Page 94: Dust Catcher

    8.3 Dust Catcher 8.3.1 Removing and Cleaning the Dust Catcher 1. Make sure that the system is turned off and the machine power cord is disconnected from the power source. 2. Open the left and right front covers. The dust catcher is located on the right drawer. CEZ120 3.
  • Page 95 4. Remove the three black screws on the cover plate, and then remove the cover plate. CEZ195 5. Remove the two black screws on the dust catcher, and then remove the dust catcher. CEZ197 6. Empty the dust catcher into a dust bin. 7.
  • Page 96 8.3.2 Reinstalling the Dust Catcher 1. Reattach the dust catcher with the two black screws. CEZ198 2. Reattach the cover plate with the three black screws. CEZ196...
  • Page 97 3. Push the right drawer into the main unit until it stops, and then pull up the lever CEZ122 4. Reconnect the power cord to the power source. 5. Turn the machine's main power switch to ON, close the left and right front covers, and then wait for the machine to warm up.

  • Page 98: Roller And Sensor Inspection And Cleaning

    9. Roller and Sensor Inspection and Cleaning What You Need • Accessory hex screwdriver provided with the machine. • A drop cloth, newspaper, or other paper to spread in front of the machine and to cover a nearby flat surface on which you can place the removed components. •...

  • Page 99: Overview

    9.1 Overview This section describes how to clean the rollers and sensors in the paper path. Four units comprise the paper path. CEZ226 Paper bank Paper supply, Tray 1, Tray 2 Vertical transport unit Relays paper to right drawer Right drawer Paper registration, transfer unit, 2nd half of the duplex path Left drawer...
  • Page 100 9.2.2 Tray 1, Tray 2 CAUTION • Make sure that the main machine is switched off and that its power cord is disconnected before doing the following procedures. CEZ227 Tray 1 Tray 2 1st pickup roller 2nd pickup roller 1st paper feed roller 2nd paper feed roller 1st separation roller 2nd separation roller...
  • Page 101 1. Follow the procedure in "Main Machine Roller Replacement" to remove the inner tray of Tray 1. This will allow you to see the rollers of Tray 2 and Tray 1. 2. Clean the rollers with a dry cloth. 3. Use the blower blush on the 2nd paper end sensor (1) and 2nd paper feed sensor (2).
  • Page 102 9.2.3 Vertical Transport Unit CEZ228 Horizontal transport rollers Vertical transport sensor 1st transport sensor Bank exit sensor 2nd transport sensor Bank exit rollers Lower transport rollers Main relay sensor 1 Upper transport rollers 1. Make sure that the system is turned off and the machine power cord is disconnected from the power source.
  • Page 103 4. Use the blower brush on the (1) 2nd transport sensor (2) Vertical transport sensor CEZ234 5. Turn the knob as you hold the cloth against the rollers. 6. Use a dry cloth on the (1) Lower transport drive rollers (2) Upper transport drive rollers CEZ235...
  • Page 104 7. Use a dry cloth on the (1) Lower transport idle rollers (2) Upper transport idle rollers (3) 2nd vertical plate (4) 1st vertical plate CEZ236 8. Use the blower brush on the (1) Bank exit sensor (2) Main relay sensor 1 CEZ237...
  • Page 105 9. Use a dry cloth on the (1) Bank exit drive rollers (2) Bank exit idle rollers CEZ238 10. Pull up the lever A1 to close the lower and upper transport plates. CEZ239 11. Pull down the lever B5 and pull out the right drawer until it stops. CEZ121...
  • Page 106 12. Use a dry cloth on the horizontal transport rollers (1). 13. Use the blower brush on the 1st transport sensor (2). CEZ240 14. Push the right drawer into the main unit until it stops, and then pull up the lever CEZ122 15.
  • Page 107 9.2.4 Right Drawer 15 16 CEZ230 Main relay rollers 10 Registration timing rollers Main relay sensor 2 11 Registration timing sensor Registration entrance rollers 12 Transfer timing rollers Main relay sensor 3 13 Transfer timing sensor LCT relay sensor 1 14 PTR (paper transfer roller) LCT relay rollers 15 Duplex transport sensor 4...
  • Page 108 1. Make sure that the system is turned off and the machine power cord is disconnected from the power source. 2. Open the left and right front covers. 3. Pull down the lever B5 and pull out the right drawer until it stops. CEZ121 4.
  • Page 109 7. Hold a dry cloth against the main relay idle rollers. 8. Rotate the end of the roller. CEZ266 9. Use the blower blush on the main relay sensor 2. CEZ267 10. While turning the knob B3, use a dry cloth on the registration entrance idle rollers.
  • Page 110 11. On the inside of the right drawer, hold a dry cloth against the registration entrance drive rollers while turning the knob B3. CEZ272 12. Use the blower bush on the main relay sensor 3 on the right side of the drawer above the registration entrance idle rollers cleaned in Step 11.
  • Page 111 16. Hold a dry cloth between the plates and the rollers to clean the drive rollers as they rotate. CEZ276 17. Use the blower brush on the LCT relay sensor 1. CEZ277 18. Use the blower blush on the LCT relay sensor 2. CEZ280...
  • Page 112 19. Remove the black screw on the double-feed sensor bracket and turn it over so you can see the top sensor. CEZ284 20. Use the blower brush on the double-feed sensor (receptor) (1). 21. Use the blower brush on the double-feed sensor (emitter) (2). 22.
  • Page 113 24. Turn the knob B4 on the inside of the right drawer while using a dry cloth on the registration timing drive rollers. CEZ287 25. Pull up the lever to close the plates. CEZ264 26. Use the blower brush on the registration timing sensor. CEZ288...
  • Page 114 27. Use a dry cloth on the (1) Shift idle rollers (rear) (2) Shift idle rollers (front) CEZ291 28. Remove the dust catcher and clean it. For details, see p.94 "Removing and Cleaning the Dust Catcher". 29. Reattach the dust catcher with the two black screws. CEZ198 30.
  • Page 115 32. Turn the knob B6 while using a dry cloth on the transfer timing idle roller. CEZ299 33. Turn the knob B6 while using a dry cloth on the transfer timing drive roller. CEZ300 34. Use the blower brush on the transfer timing sensor. CEZ301 35.
  • Page 116 36. Reattach the cover plate with the three black screws. CEZ196 37. Lower the duplex transport path plate (Z4) on the front of the right drawer. CEZ302 38. Rotate the knob Z2. CEZ303...
  • Page 117 39. Clean the rollers (as you rotate the knob) and sensors under the right drawer. CEZ304 Duplex transport sensor 4 Blower brush Duplex transport drive rollers 5 Dry cloth Duplex transport idle rollers 5 Dry cloth Duplex transport sensor 5 Blower brush Duplex transport drive rollers 6 Dry cloth...
  • Page 118 41. Push the right drawer into the main unit until it stops, and then pull up the lever CEZ122 42. Close the left and right front covers.
  • Page 119 9.2.5 Left Drawer 12 11 19 20 21 22 CEZ229 Paper transport belt sensor 13 Invert exit rollers 2 Fusing exit sensor 14 Exit relay sensor Exit unit entrance rollers 15 Invert exit rollers 1 Cooling unit entrance sensor 16 Purge relay sensor Cooling unit entrance rollers 17 Duplex transport rollers 1 Cooling pipe roller...
  • Page 120 1. Make sure that the system is turned off and the machine power cord is disconnected from the power source. 2. Open the left and right front covers. 3. Lower the lever C1, and then pull the left drawer out completely until it stops. CEZ124 4.
  • Page 121 6. Open the cover D2 on top of the fusing unit. CEZ188 7. Use a dry cloth on the rollers, strippers, and plates (1). 8. Use the blower brush on the fusing exit sensor (2). CEZ246 9. Close the cover D2. 10.
  • Page 122 12. Use a dry cloth on the exit unit entrance rollers. CEZ247 13. Use a dry cloth on the cooling unit entrance rollers (1). 14. Use the blower brush on the cooling unit entrance sensor (2). CEZ248 15. Close the cover D3. 16.
  • Page 123 17. Turn the knob D1 while using a dry cloth on the: (1) Cooling belt (2) Cooling pipe roller CEZ250 18. While turning the knob D1, use a dry cloth on the exit relay drive rollers (1). 19. Use a dry cloth on the exit relay idle rollers (2). CEZ251...
  • Page 124 20. Turn the knob D1 while using a dry cloth on the: (1) Exit idle roller (2) Exit drive roller (3) Cooling belt idle rollers CEZ252 21. Use the blower brush on the: (1) Exit sensor (2) Exit JG sensor CEZ253 22.
  • Page 125 23. Pull down and open the cover D5. CEZ255 24. Turn the knob D1 while using a dry cloth on the invert exit rollers 2. CEZ257 25. Turn the gear in the back while using a dry cloth on the: (1) Invert exit drive rollers 1 (as you rotate the gear) (2) Invert exit idle rollers 1 CEZ258...
  • Page 126 26. Use the blower brush on the: (1) Exit relay sensor (2) Purge relay sensor CEZ260 27. Pull up and close the cover D5. 28. Use a hand vacuum cleaner to clean the anti-static brush near the exit rollers. CEZ256 29.
  • Page 127 30. Turn the knob Z1. CEZ243 31. Under the left drawer, clean the rollers (as you rotate the knob) and sensors. CEZ261 Duplex transport drive roller 1 Dry cloth Duplex transport idle roller 1 Dry cloth Duplex transport sensor 1 Blower brush Duplex transport drive roller 2 Dry cloth...
  • Page 128 32. Close the duplex transport path plate (Z3). CEZ244 33. Push the left drawer slowly into the machine until it stops, and then pull up the lever C1. CEZ128 34. Close the left and right front covers.
  • Page 129 9.2.6 Purged Paper Sensor 1. Open the left front cover. 2. If there is any paper in the purge tray, remove it. 3. Use the blower brush on the purged paper sensor CEZ262 4. Close the left front cover. Copyright © 2011...
  • Page 130 D074-9502B...

This manual is also suitable for:

Pro c751exPro c751

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