Xerox Phaser 6120 Service Manual
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Xerox Phaser 6120 Service Manual

Color laser printer
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Summary of Contents for Xerox Phaser 6120

  • Page 3: Phaser 6120

    ® Phaser 6120 Color Laser Printer Service Manual Warning: The following servicing instructions are for use by qualified service personnel only. To avoid personal injury, do not perform any servicing other than that contained in the operating instructions, unless you are qualified to do so. First Printing: August 2005 071-0877-00 Phaser®...
  • Page 4 , the stylized X , CentreWare , infoSMART , Made For Each Other , Phaser ® ™ PhaserSMART , and Walk-Up are trademarks of Xerox Corporation in the United States and/or other countries. ® ® ® ® ® ® ® ®...

  • Page 5: Service Terms

    Service Terms Cautions, Notes, and Warnings Note: A note indicates an operating or maintenance procedure, practice or condition that is necessary to efficiently accomplish a task. A note can provide additional information related to a specific subject or add a comment on the results achieved through a previous action.

  • Page 6: Safety Precautions

    Safety Precautions Power Source For 110 VAC printers, do not apply more than 135 volts RMS between the supply conductors or between either supply conductor and ground. Use only the specified power cord and connector. For 220 VAC printers, do not apply more than 254 volts RMS between the supply conductors or between either supply conductor and ground.
  • Page 7 Avoid the potential of electrical shock by ensuring that the printer is properly grounded. Electrical products may be hazardous if misused. Do not place the printer in an area where people might step on the power cord. Do not place objects on the power cord. Do not block the ventilation openings.

  • Page 8: Electrostatic Discharge (Esd) Precautions

    Electrostatic Discharge (ESD) Precautions Some semiconductor components, and the respective sub-assemblies that contain them, are vulnerable to damage by Electrostatic Discharge (ESD). These components include Integrated Circuits (ICs), Large-Scale Integrated Circuits (LSIs), field-effect transistors and other semiconductor chip components. The following techniques will reduce the occurrence of component damage caused by static electricity.

  • Page 9: Service Safety Summary

    Service Safety Summary General Guidelines Your printer and supplies were designed and tested to meet strict safety requirements. These include safety agency examination, approval, and compliance with established environmental standards. Your attention to the following safety guidelines helps to ensure the continued, safe operation of your printer.

  • Page 10: Servicing Electrical Components

    Servicing Electrical Components Before starting any service procedure, switch off the printer power and unplug the power cord from the wall outlet. If you must service the printer with power applied, be aware of the potential for electrical shock. Warning: Turning the power off by using the On/Off switch may not completely de-energize the printer.

  • Page 11: Moving The Printer

    Moving the Printer Follow these guidelines to avoid injuring yourself or damaging the printer: Turn off the printer and unplug all power cables before moving the printer. Always lift the printer from the designated lift points. 20.5 Do not place any food or liquids on the printer. Caution: Damage to the printer resulting from improper moving or failure to repackage the printer properly for shipment, is not covered by the warranty, service agreement, or...

  • Page 12: Safety Specifications

    Safety Specifications Laser Safety Laser aperture of the print head unit Laser caution label Laseröffnung in der Druckkopfeinheit Lasersicherheit-Aufkleber English ( EN ) Deutsch ( DE ) Regulation Notices Hinweise und gesetzliche Bestimmungen • • Laser Safety Lasersicherheit This product employs a Class 3B laser diode having In diesem Produkt kommt eine Laserdiode der Klasse 3B maximum power of 10 mW and wavelength of 775 - 800 mit einer maximalen Leistung von 10 mW und einer...

  • Page 13: Symbols Marked On Product

    Symbols Marked on Product Use caution (or draws attention to a particular component). See the manual(s) for information. Use caution (or draws attention to a particular component). See the manual(s) for information. Hot surface on or in the printer. Use caution to avoid personal injury. Do not touch the imaging unit.

  • Page 14: Material Safety Data Sheet

    Product Recycling and Disposal All Countries If you are managing the disposal of your Xerox product, please note that the product contains lead, mercury, and other materials whose disposal may be regulated due to environmental considerations in certain countries or states. The presence of lead and mercury is fully consistent with global regulations applicable at the time that the product was placed on the market.

  • Page 15: Professional/Business Environment

    In accordance with European legislation, end of life electrical and electronic equipment subject to disposal must be managed within agreed procedures. Prior to disposal, please contact your local dealer or Xerox representative for end of life takeback information. North America Xerox operates an equipment takeback and reuse/recycle program.

  • Page 16: Regulatory Information (English Only)

    Consult the dealer or an experienced radio/television technician for help. Any changes or modifications not expressly approved by Xerox could void the user's authority to operate the equipment. To ensure compliance with Part 15 of the FCC rules, use shielded interface cables.

  • Page 17: Electromagnetic Compatibility Directive 89/336/Eec As Amended

    Electromagnetic Compatibility Directive 89/336/EEC as amended EN 55022:1998+A1:2000 +A2:2003 EN 55024:1998+A1:2001 +A2:2003 EN 61000-3-2:2000 EN 61000-3-3:1995+A1:2001 Phaser® 6120 Color Laser Printer Service Manual...

  • Page 18: Table Of Contents

    Contents Service Terms ............. iv Cautions, Notes, and Warnings.
  • Page 19 Contents Pick-Up Roller ............2-3 Cleaning Procedure .
  • Page 20 Contents Entering the Password ......... 3-14 PRINTABLE PAGES MENU .
  • Page 21 Contents White Lines, White Bands, Colored Lines, and Colored Bands in the Scan Direction (CD) ............4-24 Uneven Density in the Feed Direction .
  • Page 22 Contents Main Motor (M1) ........... 5-27 Power Supply Cooling Fan Motor (M4) .
  • Page 23 Contents P22 Wiring............. . 6-46 P23 Wiring.
  • Page 24 Contents Paper Exit ............7-52 Paper Exit Drive .
  • Page 25 Contents P4 Wiring............. . . 8-23 P5 Accessories.
  • Page 26 Contents 2-Sided Printing Method ..........9-23 Operations in 2-sided Printing with a Single Sheet of Paper Resident in the Sys- tem .

  • Page 27: Print Engine General Information

    Print Engine General Information Print Engine General Information This section contains the following: System Configuration on page 1-2 Space Requirements on page 1-3 Product Specifications on page 1-4 Media Specifications on page 1-5 Functional Specifications on page 1-7 Phaser® 6120 Color Laser Printer Service Manual...

  • Page 28: System Configuration

    Print Engine General Information System Configuration Front View Output tray Front cover Control panel Tray 1 (Multipurpose tray) Power switch Top cover Transfer belt Fuser Fuser separator levers Imaging unit Toner cartridge carousel (containing 4 toner cartridges: C, M, Y and K) USB port Parallel port 10Base-T/100Base-TX (IEEE 802.3) Ethernet...

  • Page 29: Rear View With Options

    Print Engine General Information Rear View with Options Duplex unit Space Requirements To ensure easy operation, consumable replacement and maintenance, adhere to the recommended space requirements detailed below. 210.2 (8.3") 560.8 mm (22.1") 442 mm (17.4") 771.0 mm (30.4") Front View Side View Note: The options appear shaded in the above illustration.

  • Page 30: Product Specifications

    Print Engine General Information Product Specifications Type Desktop full-color laser beam printer Printing System Semiconductor laser and electrostatic image transfer to plain paper Exposure System 2 laser diodes and polygon mirror PC Drum Type OPC (organic photo conductor) Photoconductor Blade cleaning system Cleaning Print Density 600 x 600 dpi...

  • Page 31: Media Specifications

    Print Engine General Information Media Specifications Paper Type Size Paper Type Size Letter 8.5" x 11" Government Letter 8.0" x 10.5" 210 x 297 mm Government Legal 8.0" x 13" Legal 8.5" x 14" SP Folio 8.5" x 12.69" Folio 210 x 330 mm 110 x 220 mm Executive...
  • Page 32 Print Engine General Information Media Input Capacity Envelope/ Source Plain Paper Transparency Paper Label Cardstock Remark Tray 1 20 Ib. paper Tray 2 20 Ib. paper Media Output Stacker Capacity Output Location 20 lb. paper Remark Face Down 200 sheets (paper) 20 lb.

  • Page 33: Functional Specifications

    Occasionally, a piece of paper may get pushed out by another paper, this occurrence rate should be less than 1 for every 50 sheet and less than 50 mm. The scattering should be tested with either Xerox 4024 75 gsm paper or Xerox 4200 75 gsm paper.
  • Page 34 Print Engine General Information Printer Recommended Average Number of Printed Sheets (Monthly): 650 pages (A4 and Letter size Duty Cycle 5% coverage) Maximum Number Of Printed Sheets (Monthly): 35K pages (A4 and Letter 5% coverage) Printer Life 200,000 pages or 5 years Printer Serial Number YGG = 120 V printer YGH = 220 V printer The first digit of the serial number string is the revision of the printer.
  • Page 35 Print Engine General Information Low/Out Behavior for Consumables Device for New CRU Life Hard Reset to Life Data Message Detection (100%) Stop Stored at Toner (pixel) Low / Out CRUM 96%/ 100% By new MCU/ 88%* toner Toner NVRAM Toner (page) Low / Out CRUM 6000...
  • Page 36 Print Engine General Information Phaser® 6120 Color Laser Printer Service Manual 1-10...

  • Page 37: Print Engine Maintenance Information

    Print Engine Maintenance Information This section contains the following: Consumables/Routine Maintenance Items on page 2-2 Maintenance Procedures on page 2-3 Firmware Upgrade on page 2-17 Phaser® 6120 Color Laser Printer Service Manual...

  • Page 38: Consumables/Routine Maintenance Items

    Consumables/Routine Maintenance Items Consumables/Routine Maintenance Items To ensure that the machine produces good print quality and to extend its service life, it is recommended that the maintenance procedures described in this section are followed. The maintenance parts should be replaced following the quoted page counts in the life expectancy column in the following table.

  • Page 39: Maintenance Procedures

    Maintenance Procedures Service Replaceable Maintenance Parts (FRU) Reference Page in this Classification Part name Number of prints Clean Replace Manual Image Transfer Transfer Roller 120,000 page 9 section Fusing Fuser 120,000 page 14 section Maintenance Parts Life Count Explanation Near Life Description Value Life Value...

  • Page 40: Removal Procedure

    Maintenance Procedures Using a soft cloth dampened with mild detergent, wipe the Pick-Up Roller [1] clean of dirt. Do not spray detergent directly on the printer. 4139fs2501c0 Removal Procedure Open the Top Cover. Remove the imaging unit. See Imaging Unit on page 2-9.

  • Page 41: Laser (Ph) Window

    Maintenance Procedures Laser (PH) Window Cleaning Procedure Open the Top Cover. Remove the Imaging Unit. See Imaging Unit on page 2-9 Using a dry lint-free cloth, wipe the Laser (PH) window [1] clean of dirt. 4139fs2508c0 Toner Cartridge (C/M/Y/K) Removal Procedure Check the color of the toner cartridge to be replaced on the control panel.
  • Page 42 Maintenance Procedures Open the Front Cover [1] and make sure that the specific Toner Cartridge to be replaced is in the front. 4139fs2502c0 Hold onto the handle [2] of the Toner Cartridge, pull it and remove the Toner Cartridge [3]. Note: If you need to manually move the toner carousel to a specific color, open the top cover, open the front cover, and use a pen or pencil to push the release lever on the right...

  • Page 43: Reinstallation Procedure

    Maintenance Procedures Reinstallation Procedure Note: Do not let the Toner Cartridge stand upright or keep it in an upright position. 4139fs2506c0 Prepare a new Toner Cartridge. Shake the Toner Cartridge [1] a few times to distribute the toner. 4139fs2534c0 Remove the Protective Cover [2]. 4139fs2504c0 Phaser®...
  • Page 44 Maintenance Procedures Aligning the shaft [3] on both sides of the Toner Cartridge with the rails in the machine, install the Toner Cartridge [4]. 4139fs2505c0 Press down on the Toner Cartridge [5] until it snaps into place. 4139fs2537c0 Close the Front Cover. Close the Top Cover.

  • Page 45: Imaging Unit

    Maintenance Procedures Imaging Unit Replacement Procedure Open the Top Cover. Hold onto the handle [2] of the Imaging Unit [1] and slowly lift the Imaging Unit out of the machine. 4139fs2507c0 To reinstall, reverse the order of removal. Note: There is a first-use fuse. Once you have installed the imaging unit, the fuse is blown.
  • Page 46 Maintenance Procedures Remove the Transfer Roller Assy [3] as follows. While squeezing the tabs [2] of the holders [1] located on both sides, pull out the transfer roller [1]. Caution: Use care not to lose the two springs of the Transfer Roller Assy. They can easily come off.

  • Page 47: Reassembly Procedures

    Maintenance Procedures When the Transfer Roller is replaced with a new one, it is necessary to reset the life counter in the Service menu. For details of how to reset the counter, see Service Menu page 3-30. Perform the Density Calibration in the Quality menu. For information about the density calibration, see DENSITY CALIBRATION on page 3-18.

  • Page 48: Transfer Belt

    Maintenance Procedures Transfer Belt Replacement Procedure Open the Top Cover. Disconnect the connector [1]. 4139fs2002c0 Caution: When reconnecting, make sure that the connector is connected in the correct direction (the guides should be facing up toward the top cover). Remove two shoulder screws [2]. 4139fs2003c1 Phaser®...
  • Page 49 Maintenance Procedures Remove the Transfer Belt [3]. 4139fs2004c0 Caution: When replacing the Transfer Belt, use care not to touch the surface of the belt. A scratchy or dirty belt could result in image problems. Do not over-tighten the coin screws because you may strip the plastic threads. To reinstall, reverse the order of removal.

  • Page 50: Fuser

    Maintenance Procedures Fuser Warning: Before replacing the Fuser, ensure that it has had time to cool down. Replacement Procedure Remove the Rear Cover. See Rear Cover on page 5-4. Remove the Left Cover. See Left Cover on page 5-5. Remove the screws securing the metal plate, and then remove the plate [1]. shield_plate Disconnect two connectors (PJ6, PJ71) [2] from the PWB-A (Engine Control Board) [1].
  • Page 51 Maintenance Procedures Remove the Transfer Belt. See Transfer Belt on page 2-12. Carefully remove two C-rings [6] of the Top Cover [5] and unhook the two fulcrum pins of the Top Cover. 4139fs2007c0 Note: When the fulcrum pins of the Top Cover are unhooked, the springs of the Top Cover can fall off easily.
  • Page 52 Maintenance Procedures Swing open the Fuser gear cover [7]. 4139fs2008c0 Remove two screws [9] from the Fuser [8]. 4139fs2009c2 Remove the screws to loosen the metal crossbars. This allows flexibility when removing the fuser. Phaser® 6120 Color Laser Printer Service Manual 2-16...

  • Page 53: Precaution For Reinstalling The Fuser

    Firmware Upgrade Remove the Fuser [10] by sliding it to the left, and then lifting it up. [10] 4139fs2010c1 To reinstall, reverse the order of removal. When the Fuser is replaced with a new one, it is necessary to reset the life counter in the Service menu, see Entering the Service Menu on page 30.

  • Page 54: Firmware Upgrade Via A Tcp/Ip Network Connection

    Firmware Upgrade Firmware Upgrade via a TCP/IP Network Connection Note: This is the preferred method for installing the firmware update for most environments. Caution: Some of the printer's settings will be changed from their present value back to the factory default values by the firmware update. Print a Configuration Page as described in "Checking the Version of Firmware above, and use this page as a reference to restore the printer's settings after the firmware update is complete.
  • Page 55 Firmware Upgrade Type “copy_/b_XXXXXX.sys_lpt1:” and then press the Enter button (XXXXXX is the firmware data file name). Caution: Do not attempt to cancel the firmware update process or turn off the printer power during the update. The printer automatically restarts after the firmware update process is complete.

  • Page 56: Firmware Upgrade Via An Appletalk Network Connection

    Select the Phaser 6120 printer in Printer Selector window of the Apple Printer Utility, and press the Open Printer" button. If the Phaser 6120 printer does not appear in the list of printers, ensure the AppleTalk zone containing the Phaser 6120 printer is selected.

  • Page 57: Print Engine Adjustments/Settings

    Print Engine Adjustments/Settings This section contains the following: Adjustments on page 3-2 Description of the Control Panel on page 3-2 Index of Control Panel Messages on page 3-6 Menu Map on page 3-11 Service Menu on page 3-30 Phaser® 6120 Color Laser Printer Service Manual...

  • Page 58: Adjustments

    Adjustments Adjustments How to Use the Adjustments Section This section contains detailed information on the control panel, menus, and adjustment items and procedures needed for this machine. Description of the Control Panel Control Panel Display The control panel, located on the top of the printer, allows you to direct the printer’s operation. In addition, it displays the current status of the printer, including any condition(s) that needs user attention.

  • Page 59: Control Panel Indicators And Keys (Continued)

    Description of the Control Panel Control Panel Indicators and Keys (Continued) Function Moves up in the menu structure. Within a menu choice that is changeable character by character, scrolls upward through the available characters. Moves right in the menu structure. Moves right through the available menu choices.

  • Page 60: Canceling A Print Job

    Description of the Control Panel Cancel Key The Cancel key can be used to cancel a print job. It also allows that specific print job to be resumed after the error has been eliminated. Canceling a Print Job The currently processing print job can be canceled. While data is being processed or printed (the green Ready indicator is blinking), hold down the Cancel key for more than 5 seconds.

  • Page 61: Caution Display

    Description of the Control Panel Caution Display A caution display appears when an event occurs that requires user intervention, but does not affect printing. IMAGING UNIT LOW IMAGING UNIT 4139F3E502DA 4139F3E502DA Error Display This display appears when an error occurs that can be taken care of by the user. REPLACE IMAGING UNIT 4139F3E503DA...

  • Page 62: Index Of Control Panel Messages

    Index of Control Panel Messages Index of Control Panel Messages Standard Status Messages Normal state messages are displayed on the upper line of the LCD. Message Description READY Ready to print WARMING UP Warming up INITIALIZING The printer is being initialized. ENERGY SAVER Energy Saver mode CANCELLING JOB...
  • Page 63 Index of Control Panel Messages Warning Messages (Continued) Message Description BLACK EMPTY This is displayed when the usage becomes 0%. And this status clears Near Empty/End status. The print job can be accepted if Quality Menu /Toner Out Action/CONTINUE is set in the Control Panel YELLOW EMPTY This is displayed when the usable remaining toner is 0% (Toner Empty).
  • Page 64 The developing rack will be positioned so that the user can install the corresponding missing cartridge in the order of c/ b/y/m. The message may also appear if the engines does not recognize the cartridge as a Xerox product. Phaser® 6120 Color Laser Printer Service Manual...
  • Page 65 The message may also appear if the engines does not recognize the cartridge as a Xerox product. BLACK TONER Black toner cartridge is not installed.
  • Page 66 Index of Control Panel Messages Fatal Error Messages (Continued) Message Description ERROR 10 - LASER UNIT P/H unit error ERROR 12 - LASER UNIT Laser unit error ERROR 14 - TRANSFER ROLLER Transfer roller error ERROR 15 - TRANSFER BELT Transfer belt error ERROR 16 - TRANSFER BELT Transfer belt error...

  • Page 67: Menu Map

    Menu Map Menu Map Printing the Menu Map The Menu Map helps you navigate the control panel menus. To print the Menu Map: On the control panel, select Printable Pages Menu, and then press the Menu/Select key. Select Menu Map, and then press the Menu/Select key. Select Yes, and then press the Menu/Select key.
  • Page 68 Menu Map MENU ENABLE DHCP/BOOTP *1 This setting is IP ADDRESS available only when DEFAULT ROUTER SUBNET MASK an optional Hard ENABLE HTTP TCP/IP Drive is installed. ENABLE AUTO IP IPX/SPX ETHERTALK *2 This menu item FRAME TYPE ETHERNET SPEED appears only on PS PROTOCOL NAME...

  • Page 69: Proof/Print Menus

    Menu Map PROOF/PRINT MENUS With this menu item, print jobs that were set to be saved on the hard drive by using Job Retention on the Basic tab of the printer driver can be printed or deleted. Note: This setting is available only when an optional hard drive is installed. MENU PROOF/PRINT MENU *1 "User name"...

  • Page 70: Printable Pages Menu

    Menu Map PRINTABLE PAGES MENU MENU MAP Function Prints the Menu Map. To check the available menu settings. Setting/procedure Select MENU MAP and press the Menu Select key. CONFIGURATION Function Prints the Configuration Page. To check configuration of the machine. The following items can be checked: Printer Information Printer Interfaces INSTALLED OPTIONS...

  • Page 71: Paper Menu

    Menu Map PAPER MENU INPUT TRAY TRAY 1 MODE Function When printing from Tray 1, selects whether the media size and media type set in the printer driver or the MEDIA SIZE and MEDIA TYPE settings set by selecting PAPER MENU → INPUT TRAY → TRAY 1 in the control panel have priority.
  • Page 72 Menu Map MEDIA TYPE Function Specifies the setting for the type of media loaded in Tray 2. To specify the type of media loaded in Tray 2. Setting/procedure The default setting is PLAIN PAPER. PLAIN PAPER, LETTERHEAD CUSTOM WIDTH Function Specifies the width of the custom-sized paper in Tray 1.
  • Page 73 DUPLEX Function Selects whether or not the duplex print function is used. To use the duplex print function. OFF: Duplex printing is not possible. LONG EDGE: The pages will be printed on both sides of the paper for long- edge binding. SHORT EDGE: The pages will be printed on both sides of the paper for short-edge binding.

  • Page 74: Quality Menu

    QUALITY MENU TONER REMOVAL BLACK/CYAN/MAGENTA/YELLOW Function Moves the specified color of Toner Cartridge into replacement position, so it can be replaced. To replace the specified color of Toner Cartridge. Setting/procedure Select QUALITY MENU→ TONER and the specific color of toner to be replaced.

  • Page 75: Connection Setup

    TRANSFER BELT Function Resets the transfer belt life count. To reset life count. Setting/procedure After the transfer belt is replaced, select QUALITY MENU→ TRANSFER BELT → RESET COUNT CONNECTION SETUP NETWORK SETUP TCP/IP Function Sets whether to enable or disable TCP/IP. To disable TCP/IP.

  • Page 76: Ipx/Spx

    To set the Printer name displayed on the Macintosh EtherTalk (AppleTalk) network. The printer name can contain a maximum of 16 characters. Setting/procedure The default setting is Phaser 6120. NAME 2 Function Specifies the second part of the name of the printer on the Macintosh EtherTalk (AppleTalk) network, so it can be “found.”...

  • Page 77: Usb Setup

    NETZONE Function Specifies the first part of the Macintosh EtherTalk zone name. To set the Zone name on Macintosh EtherTalk (AppleTalk) network where the printer is located. The zone name can contain a maximum of 16 characters. Setting/procedure The default setting is . NETZONE 2 Function Specifies the second part of the Macintosh EtherTalk zone name.

  • Page 78: System Default Menu

    PARALLEL JOB TIMEOUT Function Specifies the length of time until the print job being received is timed out when the parallel interface is being used. To set the amount of time before a print job sent to the parallel interface times out.
  • Page 79 AUTO DEFAULT Function Selects the printer description language when it cannot be identified from the data. To set the printer control language to be used when it cannot be automatically identified from the print job. Setting/procedure The default setting is AUTOMATIC. “AUTOMATIC”, PCL5, POSTSCRIPT POSTSCRIPT ERROR PAGE...
  • Page 80 <POINT SIZE> Function Sets the font size in the PCL language when not specified by the printer driver. To set the font size in the PCL language when it cannot be specified by the printer driver during printing from Windows DOS, etc. Setting/procedure The default setting is 1200.
  • Page 81 DATE & TIME Function Sets the TOD (time-of-day) clock on the hard drive. To adjust the TOD clock on the hard drive. The settings appear in the following order: year, month, day:hour, minutes, seconds. Note: This menu item appears only if an optional hard drive installed. Setting/procedure Select “DATE &...
  • Page 82 SET PASSWORD Function Sets the password for displaying the menus. To set the password for protecting the menus. The specified password is applied only if SECURITY → CONFIG → ENABLE is set to “ON.” Setting/procedure Select “SET PASSWORD.” Enter the 8-digit password. Accept the password setting using the Menu Select key.

  • Page 83: Environment Menu

    SAVE CUSTOM Function Selects whether or not all changed menu settings are saved. To save the custom settings. Setting/procedure The default setting is NO. NO/YES If YES is selected, all changes are saved. RESTORE CUSTOM Function Selects whether or not menu items are reverted to the previously saved settings.
  • Page 84 ALTITUDE SETUP (Continued) Setting/procedure The default setting is 0. Call the ENVIRONMENT MENU to the menu screen. Select ALTITUDE SETUP using the < or > key and press the Menu/Select key. In ALTITUDE SETUP, press the < or > key as necessary to select the appropriate altitude setting value.
  • Page 85 DUPLEX DENSITY The duplex density function allows the user to adjust the toner density (T/C) to compensate for an image quality (light or dark duplex print) issue that may occur in duplex outputs, when the printer operates in certain climates, such as dry or high humidity. Function Adjusts the toner cartridge (T/C) ratio control level when a faulty image density occurs due to changes in weather or environment.

  • Page 86: Service Menu

    Service Menu Service Menu Entering the Service Menu Note: Ensure appropriate security for the Service menu entry procedure. It should NEVER be given to any unauthorized person. Select SERVICE MENU and press the Menu Select key. Press the Menu Select key twice. Using the Arrow keys, enter the password. (The password is “XRX6120N.”...
  • Page 87 Service Menu TRANSFER ROLLER Function Resets the counter value of the Transfer Roller. To reset the Transfer Roller counter when the Transfer Roller is replaced. Setting Enter the Service menu. /procedure Select “TRANSFER ROLLER.” Select “YES” and press the Menu Select key. REMOVE ALL Function Moves each color Toner Cartridge to the appropriate replacement position,...
  • Page 88 Service Menu Phaser® 6120 Color Laser Printer Service Manual 3-32...

  • Page 89: Print Engine Troubleshooting

    Print Engine Troubleshooting This section contains the following: Overview on page 4-2 Misfeeds and Paper Jams on page 4-4 Misfeed/Jam Troubleshooting Procedures on page 4-7 Error Codes on page 4-11 Error Codes and Messages Index on page 4-12 Error Codes and Messages Troubleshooting Procedures on page 4-15 Power Supply Errors on page 4-22...

  • Page 90: Overview

    Overview Overview Troubleshooting procedures isolate a problem to a specific component or subassembly. Locate the Jam or Error Code troubleshooting procedure and follow the steps through completion and replace any component that fails a troubleshooting “Check Procedure”. If you go through the procedures and are still unable to solve the problem, re-read the “Theory of Operation”...

  • Page 91: Paper Path Test

    Overview Paper Path Test Run the Paper Path diagnostic test to confirm the functionality of all electro-mechanical components (rollers, clutches, motors, sensors, etc.) required by the printer to successfully pick and feed paper through the printer. Note: This test will not run if the printer is currently in an error state. Test Notes: The test will run continuously until the paper tray is empty.

  • Page 92: Misfeeds And Paper Jams

    Misfeeds and Paper Jams Misfeeds and Paper Jams Misfeed or Jam Control Panel Display When a media misfeed or jam occurs, the printer shows the corresponding media misfeed status by means of the Error indicator and status message on the Control Panel. For details on each status message, see Print Engine Adjustments/Settings on page 3-1.

  • Page 93: Misfeed/Jam Definition Table

    Misfeeds and Paper Jams Misfeed/Jam Definition Table Control Panel Misfeed Location Misfeed Clearing Action PAPER JAM Paper take-up section Top Cover, Front page 4-7 Cover TRAY 1 PAPER JAM Transfer section Top Cover page 4-8 TRANSFER PAPER JAM Fusing section Top Cover page 4-9 FUSER...

  • Page 94: Paper Path Sensor Location Diagram

    Misfeeds and Paper Jams Paper Path Sensor Location Diagram Note: Refer to Appendix A for other sensor locations. 4139fs4508c0 Name Name Exit Sensor Duplex Paper Loop Sensor PC10 DU Fusing Paper Loop Registration Sensor Sensor Duplex Transport Sensor PC12 DU Phaser®...

  • Page 95: Misfeed/Jam Troubleshooting Procedures

    Misfeed/Jam Troubleshooting Procedures Misfeed/Jam Troubleshooting Procedures Initial Check Items When a media misfeed occurs, perform the following steps first: Check Item Action Does the media meet product specifications? See Media Change the media. Specifications on page 1-5. Is the media curled, wavy, or damp? Change the media.

  • Page 96: Paper Jam Transfer Roller

    Misfeed/Jam Troubleshooting Procedures Actions WIRING DIAGRAM Location (Electrical Steps Action Control Signal Component) Initial check items. Check the PWB-A connector for proper connection and correct as necessary. PC1 sensor check. PWB-A PJ12A-3 (ON) SL1 operation check. HV PJ2HV-2 (REM) REM = Solenoid On Change PWB-A.

  • Page 97: Paper Jam Fuser

    Misfeed/Jam Troubleshooting Procedures Actions WIRING DIAGRAM Location (Electrical Step Action Control Signal Component) Initial check items. Check the PWB-A connector for proper connection and correct as necessary. PC1 sensor check. PWB-A PJ12A-3 (ON) PC8 sensor check. PWB-A PJ14A-6 (ON) SL2 operation check. PWB-A PJ11A-4 (REM) Change PWB-A.

  • Page 98: Paper Jam Exit

    Misfeed/Jam Troubleshooting Procedures Paper Jam Exit Detection Timing Type Description Detection of The Exit Sensor (PC7) is not unblocked even after the lapse of a misfeed at exit predetermined period of time after it has been blocked by the paper. section Detection of paper left in The Exit Sensor (PC7) is blocked when the Power Switch is turned ON, a...

  • Page 99: Error Codes

    Error Codes WIRING DIAGRAM Location (Electrical Control Signal Component) Step Action Check the PWB-A connector for proper connection and correct as necessary. Change PWB-P. Change PWB-A. Error Codes Error Code Messages When a malfunction occurs, the printer shows the corresponding error status by means of the Error indicator and status/error code message on the control panels LCD display.

  • Page 100: Error Codes And Messages Index

    Error Codes and Messages Index Error Codes and Messages Index For the exact control panel fatal error message, see on page 3-9. Code Description Detection Timing Mechanical Control Board Communications with the M/C expansion IO G/A (IC on the malfunction Mechanical Control Board) are not properly carried out.
  • Page 101 Error Codes and Messages Index Code Description Detection Timing Transfer Belt, Cleaning Blade The state of the Retraction Position Sensor/Cleaning Blade pressure/retraction failure is not changed from the blocked to unblocked state even after the lapse of a predetermined period of time during predrive.

  • Page 102: Resetting The Printer

    Error Codes and Messages Index Code Description Detection Timing Fuser Temp Faulty Thermistor The Heater Lamp remains ON for a predetermined Resistor consecutive period of time. Faulty NVRAM counter It is determined that the life counter value is faulty when the NVRAM data is read as the Power Switch is turned ON.

  • Page 103: Error Codes And Messages Troubleshooting Procedures

    Error Codes and Messages Troubleshooting Procedures Error Codes and Messages Troubleshooting Procedures 04: Engine Board Malfunction Relevant Electrical Parts PWB-A (Engine Control Board) WIRING DIAGRAM Location (Electrical Step Action Control Signal Component) Check the PWB-A connector for proper connection and correct as necessary. Change PWB-A.
  • Page 104 Error Codes and Messages Troubleshooting Procedures 0B: Transfer Fan Malfunction Relevant Electrical Parts Ventilation Fan Motor (M6) PWB-A (Engine Control Board) Power Unit (PU) WIRING DIAGRAM Location (Electrical Step Action Control Signal Component) Check the M6 connector for proper connection and correct as necessary. Check the fan for possible overload and correct as necessary.
  • Page 105 Error Codes and Messages Troubleshooting Procedures 10: Polygon Motor (Laser) Malfunction Relevant Electrical Parts Laser Unit (PH) Unit PWB-A (Engine Control Board) WIRING DIAGRAM Location (Electrical Step Action Control Signal Component) Check the cables and connectors for proper connection and correct as necessary. Change Laser Unit (PH) Unit.
  • Page 106 Error Codes and Messages Troubleshooting Procedures 15: Transfer Belt Cleaning Blade Pressure/Retraction Failure Relevant Electrical Parts *Retraction Position Sensor /Cleaning Blade (PC6) PWB-A (Engine Control Board) Pressure/Retraction Solenoid /Cleaning Blade (SL3) Main Motor (M1) * PC6 is part of the transfer belt. WIRING DIAGRAM Location (Electrical Step Action...

  • Page 107: Fuser Failures

    Error Codes and Messages Troubleshooting Procedures 17: Toner Carousel Failure Relevant Electrical Parts Toner Carousel Motor (M2) PWB-A (Engine Control Board) Toner Carousel Positioning Sensor (PC3) WIRING DIAGRAM Location (Electrical Step Action Control Signal Component) Check the M2 connector for proper connection and correct as necessary.
  • Page 108 Error Codes and Messages Troubleshooting Procedures 21: OHP Detect Sensor Relevant Electrical Parts OHP Sensor (PC2A) PWB-A (Engine Control Board) WIRING DIAGRAM Location (Electrical Step Action Control Signal Component) Check the PWB-A connector for proper connection and correct as necessary. PC2A sensor check.
  • Page 109 Error Codes and Messages Troubleshooting Procedures 2A: Faulty NVRAM Data Relevant Electrical Parts NVRAM PWB-A (Engine Control Board) WIRING DIAGRAM Location (Electrical Step Action Control Signal Component) Unplug the power cord and plug it in, then turn OFF and ON the Power Switch.

  • Page 110: Power Supply Errors

    Power Supply Errors Power Supply Errors Printer Does Not Power ON - LVPS (PU) Operation Check Relevant Electrical Parts Power Switch Power Unit (PU) PWB-A (Engine Control Board) Location (Electrical Step Check Item Component) Result Action Is the power source voltage being applied to Check wiring from CN1 on LVPS (PU)? power outlet PG1 to...

  • Page 111: Image-Quality Problems

    Image-Quality Problems Image-Quality Problems Image-quality defects can be attributed to printer components, consumable, media, internal software, external software applications, and environmental conditions. To successfully troubleshoot image-quality problems, as many variables as possible must be eliminated. The following guidelines should be used before troubleshooting an image-quality problem: Use an unopened ream of approved media for evaluating image-quality problems Note: See the approved media list,...
  • Page 112 Image-Quality Problems White Lines, White Bands, Colored Lines, and Colored Bands in the Feed Direction (FD) Typical Faulty Images White lines in FD White bands in FD Colored lines in FD Colored bands in FD 4036fs4022c0 4036fs4023c0 4036fs4021c0 4036fs4024c0 Troubleshooting Procedure Step Section Check Item...
  • Page 113 Image-Quality Problems White Lines, White Bands, Colored Lines, and Colored Bands in the Scan Direction (CD) Typical Faulty Images White lines in CD White bands in CD Colored lines in CD Colored bands in CD 4036fs4028c0 4036fs4026c0 4036fs4027c0 4036fs4025c0 Troubleshooting Procedure Step Section Check Item...

  • Page 114: Uneven Density In The Feed Direction

    Image-Quality Problems Uneven Density in the Feed Direction Typical Faulty Images 4036fs4043c0 4036fs4044c0 4036fs4045c0 Troubleshooting Procedure Step Section Check Item Result Action Imaging Unit Are there scratches or lines evident Replace the Imaging Unit. on the photo conductor surface? Is the outside of the imaging unit Clean.

  • Page 115: Uneven Density In Scan Direction (Cd)

    Image-Quality Problems Uneven Density in Scan Direction (CD) Typical Faulty Images 4036fs4046c0 4036fs4047c0 Troubleshooting Procedure Step Section Check Item Result Action Imaging Unit Are there scratches or lines evident Replace the Imaging Unit. on the photo conductor surface? Is the outside of the imaging unit Clean.

  • Page 116: Low Image Density

    Image-Quality Problems Low Image Density Typical Faulty Images ABCDE ABCDE ABCDE ABCDE ABCDE 4036fs4036c0 Troubleshooting Procedure Step Section Check Item Result Action Imaging Unit Is the outside of the imaging unit Clean. dirty? Laser (PH) Is the window surface dirty? Clean.

  • Page 117: Gradation Reproduction Failure

    Image-Quality Problems Gradation Reproduction Failure Typical Faulty Images 4036fs4048c0 4036fs4049c0 Troubleshooting Procedure Step Section Check Item Result Action Imaging Unit Is the outside of the imaging unit Clean. dirty? Laser (PH) Is the window surface dirty? Clean. Unit Density Is the sensor dirty? Clean.

  • Page 118: Foggy Background

    Image-Quality Problems Foggy Background Typical Faulty Images ABCD ABCD ABCD ABCD ABCD 4036fs4030c0 Troubleshooting Procedure Step Section Check Item Result Action Imaging Unit Are there scratches or lines evident Replace the Imaging Unit. on the photo conductor surface? Is the outside of the imaging unit Clean.

  • Page 119: Poor Color Reproduction

    Image-Quality Problems Poor Color Reproduction Typical Faulty Images 4138fs4503c0 Troubleshooting Procedure Step Section Check Item Result Action Paper Is the paper damp? Replace the paper with new paper that has just been unwrapped. Transfer Belt Is the terminal dirty? Clean. Unit Density Is the sensor dirty?

  • Page 120: Void Areas, White Spots

    Image-Quality Problems Void Areas, White Spots Typical Faulty Images Void areas White spots 4036fs4051c0 4036fs4050c0 Troubleshooting Procedure Step Section Check Item Result Action Imaging Unit Are there scratches or lines evident Replace the Imaging Unit. on the photo conductor surface? Is the outside of the imaging unit Clean.

  • Page 121: Colored Spots

    Image-Quality Problems Colored Spots Typical Faulty Images Colored spots 4036fs4052c0 Troubleshooting Procedure Step Section Check Item Result Action Paper Size Does the paper size loaded in the Correct the paper size mismatch. tray match the selected paper size? Imaging Unit Are the spots in a single color? Replace the Imaging Unit.

  • Page 122: Blurred Image

    Image-Quality Problems Blurred Image Typical Faulty Images Blurred image 4036fs4031c0 Troubleshooting Procedure Step Section Check Item Result Action Laser (PH) Is the window surface dirty? Clean. Unit Imaging Unit Is the outside of the imaging unit Clean. dirty? Have steps 1-2 eliminated the Replace the Toner Cartridge.

  • Page 123: Blank Or Black Prints

    Image-Quality Problems Blank or Black Prints Typical Faulty Images Blank print Black print 4036fs4038c0 4036fs4039c0 Troubleshooting Procedure Step Section Check Item Result Action Image check Does a blank print occur? Check the Laser Unit (PH) connector for proper connection. Imaging Unit Is the gear of the Imaging Unit drive Check or correct the drive mechanism installed properly? transmitting section or replace the...

  • Page 124: Incorrect Color Image Registration

    Image-Quality Problems Incorrect Color Image Registration Typical Faulty Images 4036fs4032c0 Troubleshooting Procedure Step Section Check Item Result Action Transfer Belt Is the Transfer Belt dirty with Wipe the surface clean of dirt with Unit fingerprints or foreign matter? a soft cloth. Is the Transfer Belt scratched? Replace the Transfer Belt.

  • Page 125: Poor Fusing Performance, Offset

    Image-Quality Problems Poor Fusing Performance, Offset Typical Faulty Images Poor fusing performance Offset 4036fs4059c0 4036fs4060c0 Troubleshooting Procedure Step Section Check Item Result Action Paper Does the paper being used conform Replace the paper. to specifications? Fusing Unit Are the green fuser separator levers Correct.

  • Page 126: Ghosting, Blurred Image

    Image-Quality Problems Ghosting, Blurred Image Typical Faulty Images Brush effect Blurred image 4036fs4061c0 4036fs4031c0 Troubleshooting Procedure Step Section Check Item Result Action Paper Is the paper damp? Replace the paper with new paper that has just been unwrapped. Does the paper being used conform Replace the paper.

  • Page 127: Back Marking

    Image-Quality Problems Back Marking Typical Faulty Images 4036fs4062c0 4036fs4063c0 Troubleshooting Procedure Step Section Check Item Result Action Paper path Is there a foreign object in the paper Remove the foreign object. path? Fusing Unit Is the Fusing Entrance Guide Plate Clean or replace.

  • Page 128: Uneven Pitch

    Image-Quality Problems Uneven Pitch Typical Faulty Images 4138fs4507c0 Troubleshooting Procedure Step Section Check Item Result Action Toner Is the Toner Cartridge for each color Reinstall. Cartridge of toner installed in position? Laser (PH) Is the Laser Unit (PH) Unit secured in Secure it in position.

  • Page 129: Print Engine Service Parts Disassembly

    Print Engine Service Parts Disassembly This section contains the following: Disassembly/Assembly Procedures on page 5-4 Rear Panel on page 5-4 Rear Cover on page 5-4 Left Cover on page 5-5 Right Cover on page 5-6 Tray 1 (Paper Take-Up Cover) on page 5-6 Front Cover on page 5-6...

  • Page 130: Disassembly/Adjustment Prohibited Items

    Disassembly/Adjustment Prohibited Items Disassembly/Adjustment Prohibited Items Paint-Locked Screws Screws coated with black paint (such as the safety switch) indicates that the assembly has specific adjustment requirements after reassemlby. Refer to the specific disassembly/assembly procedures for details. Screws coated with red paint indicates that the part or assembley requires sensitive factory adjustments.

  • Page 131: Disassembly/Assembly List

    Disassembly/Assembly List Disassembly/Assembly List Section Part name Ref.Page Exterior parts Front Cover page 6 Right Cover page 6 Left Cover page 5 Rear Cover page 4 Rear Panel page 4 Paper Take-up Cover page 6 Boards PWB-P (Image Processor Board) page 9 PWB-A (Engine Control Board) page 12...

  • Page 132: Disassembly/Assembly Procedures

    Disassembly/Assembly Procedures Disassembly/Assembly Procedures Rear Panel Remove the screw [1] and the Rear Panel [2]. 4139fs2012c2 Rear Cover Remove the Rear Panel. See Rear Panel on page 5-4. Remove four screws [1] and the Rear Cover [2]. 4139fs2013c1 Phaser® 6120 Color Laser Printer Service Manual...

  • Page 133: Left Cover

    Disassembly/Assembly Procedures Left Cover Open the Top Cover. Remove two screws [1]. Slightly pull the cover away from the printer and lift it to release the two tabs [2] and remove the Left Cover [3]. Caution: Use care not to break the tabs during removal and reinstallation of the Left Cover. 4139fs2014c1 Note: When installing the Left Cover, make sure that the harness [4] of the Fuser is located...

  • Page 134: Right Cover

    Disassembly/Assembly Procedures Right Cover Open the Top Cover. Remove two screws [1]. Slightly pull the cover away from the printer and lift it to release the two tabs [2] and remove the Right Cover [3]. Caution: Use care not to break the tabs during removal and reinstallation of the Right Cover. 4139fs2015c2 Tray 1 (Paper Take-Up Cover) Remove the blue tray cover.

  • Page 135: Precautions For Remounting The Front Cover

    Disassembly/Assembly Procedures Remove Tray 1 (Paper Take-up Cover). See Tray 1 (Paper Take-Up Cover) on page 5-6. Remove four screws [1] and the Front Cover [2]. 4139fs2017c1 Caution: When removing and reinstalling the Front Cover, use care not to touch the Developing Roller of the Toner Cartridge.

  • Page 136: Control Panel (Pwb-Op)

    Disassembly/Assembly Procedures Control Panel (PWB-OP) Open the Top Cover. Disconnect the connector from the Transfer Belt. Remove four screws [1] and disconnect the Control Panel Protective Cover [2] from the Top Cover. 4139fs2514c0 Remove five screws and disconnect the connector(PJ1), and then remove the Control Panel.

  • Page 137: Pwb-P (Image Processor Board)

    Disassembly/Assembly Procedures PWB-P (Image Processor Board) Remove the Rear Cover. See Rear Cover on page 5-4. Remove the Left Cover. See Left Cover on page 5-5. Remove five screws [1]. 4139F2C502AA Remove the screws securing the metal plate, and then remove the plate [1]. shield_plate Disconnect one connector (PJ21) [2].
  • Page 138 Disassembly/Assembly Procedures Remove six screws [3], and then lift the left side of the PWB-P (Image Processor Board) protective shield [4] to remove it. Note: For reinstallation, notice that the screw in the top middle [3] is different from the rest of the screws.
  • Page 139 Disassembly/Assembly Procedures Slide the board to the right to disconnect CN8 [7]from the PWB-A (Engine Control Board) to remove the PWB-P (Image Processor Board) Assy [8]. If you are replacing the board, remove the three screws [9] and move the panel to the replacement board.

  • Page 140: Pwb-A (Engine Control Board)

    Disassembly/Assembly Procedures PWB-A (Engine Control Board) Remove the Rear Cover. See Rear Cover on page 5-4. Remove the screws securing the metal plate, and then remove the plate [1]. shield_plate Disconnect all connectors and flat cables from the PWB-A (Engine Control Board) [1]. 4139fs2018c0 Remove four screws [2].
  • Page 141 Disassembly/Assembly Procedures Remove Parameter Chip (NVRAM) [5] from the PWB-A (Engine Control Board) and move it to the replacement board. 4139fs2520c0 Note: Remember to remove the Parameter Chip (NVRAM) from the old PWB-A (Engine Control Board) and mount it on the new PWB-A (Engine Control Board). 4139fs2020c2 When mounting Parameter Chip (NVRAM), align the notches (indicated by “A”...

  • Page 142: Power Unit (Pu)

    Disassembly/Assembly Procedures Power Unit (PU) Remove the PWB-P (Image Processor Board). See PWB-P (Image Processor Board) page 5-9. Remove the PWB-A (Engine Control Board). See PWB-A (Engine Control Board) page 5-12. Disconnect the rear white and black connectors [2] of the Fusing Safety Switch [1] and remove the wire from the two wiring saddles [3].
  • Page 143 Disassembly/Assembly Procedures Disconnect the two white connectors [7] of the Power Switch. 4139fs2023c2 On the right side of the printer, remove a screw [8] and remove the Power Supply Cooling Fan Motor Cover [9]. 4139fs2073c1 Remove the Harness Protective Seal [12] from the rear plate. [12] 4139fs2075c1 Remove the black plastic guide at the bottom of the printer by pushing the two locking...
  • Page 144 Disassembly/Assembly Procedures Remove six screws [13] and pull the rear plate containing the Power Unit Assy [14] away from the printer. Note: Do not pull the rear plate hard, as a number of harnesses are connected to it. [13] [14] [13] 4139fs2024c2 Disconnect four connectors [16] from the Power Unit [15].

  • Page 145: High Voltage Unit (Hv)

    Disassembly/Assembly Procedures High Voltage Unit (HV) Warning: Make sure the power switch is off and the cord is unplugged prior to starting this (or any other) disassembly procedure. Remove the Left Cover. See Left Cover on page 5-5. Remove four screws [1]. 4139fs2027c0 Disconnect two connectors [2] and remove the High Voltage Unit [3].

  • Page 146: Precautions For Reinstallation Of The High Voltage Unit

    Disassembly/Assembly Procedures Precautions for Reinstallation of the High Voltage Unit Make sure that the High Voltage Unit fits underneath the tab [4] as shown in the following illustration. During the reinstallation procedure, make sure that the rack terminal assembly [5] is not deformed or left loose.

  • Page 147: Laser (Ph) Unit

    Disassembly/Assembly Procedures Unlock three tabs [5] and remove the Waste Toner Near Full Detection Board [6]. Note: When reinstalling the shield, make sure that no part of the harness is wedged in the mechanism. 4139fs2031c1 Disconnect the connector [8] of the Waste Toner Near Full Detection Board [7]. 4139fs2032c1 Laser (PH) Unit Warning:...
  • Page 148 Disassembly/Assembly Procedures Disconnect the connector (PJ20) [2] and the flat cable (PJ19) [3] from the PWB-A (Engine Control Board) [1]. 4139fs2033c2 Disconnect the connector (PJ107) from the PWB-P (Image Processor Board) [4]. 4139fs2522c0 Open the Top Cover. Phaser® 6120 Color Laser Printer Service Manual 5-20...
  • Page 149 Disassembly/Assembly Procedures Press the Rack Release Lever [5] and then rotate the Rack [6] to position the Toner Cartridge [7] for removal. 4139fs2034c1 Caution: When rotating the Rack, use care not to touch the Developing Roller on the toner cartridge. Hold onto the toner cartridge handle, pull it and remove the Toner Cartridge [8].
  • Page 150 Disassembly/Assembly Procedures Remove the Laser (PH) Unit Covers (Right) [9], (Left) [10]. Disconnect the blue connector from the switch (S5). Push the tabs of the Laser (PH) Unit Cover [11] and remove the Laser (PH) Unit Cover. Caution: Use care not to pull the laser unit with an excessive force, so you do not damage the wiring harnesses.

  • Page 151: Precautions For Reinstallation Of The Laser (Ph) Unit

    Disassembly/Assembly Procedures Press the Rack Release Lever and turn the Rack so that the screw securing the Laser (PH) Unit to the chassis can be accessed through the hole [12] in the metal cross plate. Remove three screws [12] and the Laser (PH) Unit [13]. [13] [12] [12]...
  • Page 152 Disassembly/Assembly Procedures Remove one screw [1], unlock the tab [2], and release the wiring harness from the saddle [3]. Then, remove the shield [4]. 4139fs2030c1 Warning: When reinstalling the shield, make sure that no part of the harness is wedged in the mechanism.

  • Page 153: Notes For Reassembly

    Disassembly/Assembly Procedures Remove five screws [4]. Printer Printer Bottom Printer Printer Bottom 4139fs2063c3 Remove the PJ22 connector from the PWB-A (Engine Control Board). Remove one screw and the metal plate from the right side, rear of the printer. Remove the black plastic guide by pushing the two locking tabs on the right side, and then allow the guide to fall.

  • Page 154: Separation Pad

    Disassembly/Assembly Procedures Reinsert PJ22 through the opening of the chassis on the right side of the printer. Align the top pin on the left side of the take-up assembly with the groove on the chassis. Pull the tray forward until it rests underneath the cams on the take-up assembly. Using the lower alignment pin, as a reference, reinstall the unit into the printer.

  • Page 155: Removal Procedure Shortcut

    Disassembly/Assembly Procedures Removal Procedure Shortcut Open the Top Cover. Remove Tray 1. Remove the Imaging Unit. See Imaging Unit on page 2-9. Move the tray to the down position by turning the pick roller shaft. Unlock tabs [1] and remove the Separation Pad [2]. 4139fs2065c1 Main Motor (M1) Remove the Right Cover.

  • Page 156: Power Supply Cooling Fan Motor (M4)

    Disassembly/Assembly Procedures Power Supply Cooling Fan Motor (M4) Remove the Right Cover. See Right Cover on page 5-6. Disconnect the connector (PJ4A) [2] from the (PWB-A) Engine Control Board [1]. 4139fs2039c0 Unlock tabs and remove the Power Supply Cooling Fan Motor [3]. 4139fs2040c1 Ventilation Fan Motor (M6) Remove the Right Cover.

  • Page 157: Fusing Motor (M7)

    Disassembly/Assembly Procedures Unlock tabs and remove the Ventilation Fan Motor [4]. Note: Notice the position of the fan for reassembly. 4139fs2042c1 Fusing Motor (M7) Remove the Right Cover. See Right Cover on page 5-6. Remove two screws [1] and the connector [2]. Remove the harness [3] from the wiring saddle [4] and then remove the Fusing Motor [5].

  • Page 158: Developing Motor (M3)

    Disassembly/Assembly Procedures Developing Motor (M3) Remove the Right Cover. See Right Cover on page 5-6. Remove the screw [1] and the Safety Switch Assy [2]. 4139fs2044c1 Note: Precautions for Reinstallation of the Safety Switch Assy Check that the switch is actuated with the Front Cover and the Top Cover closed. If the screw is not in the original position, make sure that the distance between the switch lever and switch case (with the switch in the actuated position) falls within the specified range.

  • Page 159: Rack Motor (M2)

    Disassembly/Assembly Procedures Remove four screws [5] and remove the Rack Drive Assy [6] by pulling it straight out of the printer. 4139fs2046c0 Remove two screws [7], disconnect the connector [8], and remove the Developing Motor [9]. 4139fs2047c0 Rack Motor (M2) Remove the Rack Drive Assy.

  • Page 160: Tray 1 Paper Take-Up Solenoid (Sl1)

    Disassembly/Assembly Procedures Tray 1 Paper Take-up Solenoid (SL1) Remove the High Voltage Unit. See High Voltage Unit (HV) on page 5-17. Remove one screw [1], unlock the tab [2], and release the wiring harness from the saddle [3]. Then, remove the shield [4]. 4139fs2030c1 Caution: When reinstalling the shield, make sure that no part of the harness is wedged in...

  • Page 161: Registration Roller Solenoid (Sl2)

    Disassembly/Assembly Procedures Registration Roller Solenoid (SL2) Remove the Right Cover. See Right Cover on page 5-6. Remove the Power Supply Cooling Fan Motor Assy. See Power Unit (PU) on page 5-14. Disconnect the connector, remove the screw [1], and remove the Registration Roller Solenoid [2].

  • Page 162: Pressure/Retraction Solenoid/Cleaning Blade (Sl3)

    Disassembly/Assembly Procedures Pressure/Retraction Solenoid/Cleaning Blade (SL3) Remove the Right Cover. See Right Cover on page 5-6. Remove the screw [1], disconnect the connector [2], and remove the Pressure/Retraction Solenoid for the Cleaning Blade [3]. 4139fs2052c1 Pressure/Retraction Solenoid /2nd Image Transfer Roller (SL4) Remove the Right Cover.

  • Page 163: Temperature/Humidity Sensor (Hs1)

    Disassembly/Assembly Procedures Move the mylar sheet out of the way, and then remove the screw [3] and the Solenoid [4]. Caution: Be careful not the damage the mylar. 4139fs2055c1 Temperature/Humidity Sensor (HS1) Remove the Front Cover. See Front Cover on page 5-6. Rotate the printer on its back and remove the C-clip [1].

  • Page 164: Notes For Reassembly

    Disassembly/Assembly Procedures Loosen the paper tray by releasing the post on the left side, and then lift Tray 1 [2] out of the way. 4139fs2057c0 Note: Use care not to lose the two springs. Be careful not to damage the actuator of the Tray1 Paper Empty Sensor. Push in the tab that secures the housing to the frame.

  • Page 165: Density Sensor (Aidc)

    Disassembly/Assembly Procedures Density Sensor (AIDC) Remove the Transfer Belt. See Transfer Belt on page 2-12. On the transfer belt, remove two screws [1] and the Density Sensor protective cover [2]. 4139fs2061c0 Disconnect the connector [3] and remove the Density Sensor [4]. 4139fs2062c0 Torque Limiter Remove the Paper Take-up Unit.

  • Page 166: Reinstallation Procedure

    Disassembly/Assembly Procedures Reinstallation Procedure Note: There are five slots provided in the coupling gear [1] of the Paper Take-up Clutch. These slots are for adjusting the position of the Take-up Roller. When the torque limiter [2] is reinstalled, it is necessary to adjust the position of the coupling gear [1] and torque limiter [2] so that any paper take-up failure can be prevented.

  • Page 167: Hard Drive (Option)

    Disassembly/Assembly Procedures If the Take-up Roller [5] tilts in the counterclockwise direction, turn the coupling gear of the Paper Take-up Clutch in the direction of B and reassemble the Paper Take-up Clutch. 4139fs2532c0 Hard Drive (Option) Remove the Rear Panel. See Rear Panel on page 5-4.
  • Page 168 Disassembly/Assembly Procedures Phaser® 6120 Color Laser Printer Service Manual 5-40...

  • Page 169: Print Engine Parts List

    Print Engine Parts List This section covers the following: Using the Parts List on page 6-2 Serial Number Format on page 6-3 Diagrams of Main Parts on page 6-4 P1 External Parts on page 6-6 P2 Top Cover on page 6-8 P3 Top Cover on page 6-10 P4 Main Frame...

  • Page 170: Using The Parts List

    Print Engine Parts List Using the Parts List Changes to Xerox products are made to accommodate improved components as they become available. As improvements are made, part numbers may change from those appearing in this section. To get the latest part, provide the following information when ordering:...

  • Page 171: Serial Number Format

    Print Engine Parts List Serial Number Format The serial number is coded as follows: The text “S/N” followed by the serial number in the barcode. The barcode does not include a field identifier. The nine digit serial number format PPPRSSSSS where: PPP - Is the alphanumeric Product Code Product Voltage...

  • Page 172: Diagrams Of Main Parts

    Print Engine Parts List Diagrams of Main Parts REAR SIDE Description Parts List No. Page No. External Parts page 6-6 Top Cover page 6-8 page 6-10 Main Frame page 6-12 Left Frame page 6-14 Right Frame page 6-16 page 6-18 Drive Section page 6-20 page 6-22...
  • Page 173 Print Engine Parts List Description Parts List No. Page No. Transfer Section page 6-30 Transfer Roller Section page 6-32 Vertical Transport Section page 6-34 Fuser page 6-36 Electrical Components page 6-38 Paper Take-Up Section page 6-40 page 6-41 page 6-43 Wiring page 6-45 page 6-46...

  • Page 174: P1 External Parts

    Print Engine Parts List P1 External Parts P1 External Parts List Table Part No. Description Comments 604K35100 REAR COVER KIT Includes all parts shown within the dotted line. Some assembly required REGULATING PLATE 802E99590 RIGHT COVER DUCT SHOULDER SCREW WIRE HARNESS ASSY BRACKET 893E86110 INSTRUCTIONS (LABEL)
  • Page 175 Print Engine Parts List P1 External Parts List Table (Continued) Part No. Description Comments 802E99600 FRONT LOWER COVER 802E99610 FRONT UPPER COVER SHIELD BRACKET 604K35120 LEFT COVER KIT (US) 604K35110 LEFT COVER KIT (EU) RETAINING RING SHIELD 802E99620 COVER 826E27440 SHOULDER SCREW GUIDE 604K35500...

  • Page 176: P2 Top Cover

    Print Engine Parts List P2 Top Cover PWB-OP P2 Top Cover Parts List Table Part No. Description Comments FACE SHEET READY ERROR FACE SHEET TONER HOLDER BUTTON BUTTON BUTTON 960K25480 PWB-OP (Control Panel) Includes LCD SHIELD EARTH GROUND COVER EARTH GROUND Phaser®...
  • Page 177 Print Engine Parts List P2 Top Cover Parts List Table (Continued) Part No. Description Comments 604K35130 UPPER COVER KIT Includes all parts within the dotted lines. Some assembly required PLASTIC COVER Includes ground plate and strap. 604K35500 Part of Hardware Kit Phaser®...

  • Page 178: P3 Top Cover

    Print Engine Parts List P3 Top Cover P3 Top Cover Parts List Table Part No. Description Comments GUIDE REINFORCE PLATE 059E05440 ROLLER GUIDE COVER 050E23340 TRAY 050E23350 TRAY REINFORCE PLATE FRAME TENSION SPRING SHOULDER SCREW Phaser® 6120 Color Laser Printer Service Manual 6-10...
  • Page 179 Print Engine Parts List P3 Top Cover Parts List Table (Continued) Part No. Description Comments COVER HANDLE SHAFT FRAME HOLDER CONTACT 604K35500 Part of Hardware Kit Phaser® 6120 Color Laser Printer Service Manual 6-11...

  • Page 180: P4 Main Frame

    Print Engine Parts List P4 Main Frame P4 Main Frame Parts List Table Part No. Description Comments SEAL COVER EARTH GROUND FRAME SEAL DUCT COVER LEVER TENSION SPRING SEAL LABEL CONSUMABLES REODER 019E74390 HOLDER Phaser® 6120 Color Laser Printer Service Manual 6-12...
  • Page 181 Print Engine Parts List P4 Main Frame Parts List Table (Continued) Part No. Description Comments 130E11800 RACK POSITION SENSOR (PC3) 017E11460 RUBBER FOOT 1 per part number COVER COVER GUIDE DUCT ASSY SEAL SEAL 604K35500 Part of Hardware Kit Phaser® 6120 Color Laser Printer Service Manual 6-13...

  • Page 182: P5 Left Frame

    Print Engine Parts List P5 Left Frame PWB-C P5 Left Frame Parts List Table Part No. Description Comments LEVER TENSION SPRING GUIDE EARTH GROUND CONTACT CONTACT TORSION SPRING 960K25450 WASTE TONER NEAR FULL (PWB-C) Phaser® 6120 Color Laser Printer Service Manual 6-14...
  • Page 183 Print Engine Parts List P5 Left Frame Parts List Table (Continued) Part No. Description Comments PAWL TORSION SPRING LEVER CONTACT CONTACT CONTACT 604K35500 Part of Hardware Kit Phaser® 6120 Color Laser Printer Service Manual 6-15...

  • Page 184: P6 Right Frame

    Print Engine Parts List P6 Right Frame P6 Right Frame Parts List Table Part No. Description Comments DUCT 127E15240 POWER SUPPLY COOLING (M4) COVER 127E15250 VENTILATION FAN (M6) LEVER PRESSURE SPRING PAWL DUCT 110K15620 SAFETY SWITCH (S2) BRACKET Phaser® 6120 Color Laser Printer Service Manual 6-16...
  • Page 185 Print Engine Parts List P6 Right Frame Parts List Table (Continued) Part No. Description Comments 053E07470 FILTER DUCT SEAL SEAL 604K35500 Part of Hardware Kit Phaser® 6120 Color Laser Printer Service Manual 6-17...

  • Page 186: P7 Right Frame 2

    Print Engine Parts List P7 Right Frame 2 P7 Right Frame 2 Parts List Table Part No. Description Comments GEAR 22/64T LEVER TENSION SPRING PAWL TORSION SPRING TORSION SPRING LEVER TENSION SPRING LEVER GUIDE HOLDER SEAL Phaser® 6120 Color Laser Printer Service Manual 6-18...
  • Page 187 Print Engine Parts List P7 Right Frame 2 Parts List Table (Continued) Part No. Description Comments REINFORCE PLATE TORSION SPRING HOLDER FRICTION SHEET SEAL SHIELD 604K35500 Part of Hardware Kit Phaser® 6120 Color Laser Printer Service Manual 6-19...

  • Page 188: P8 Drive Section

    Print Engine Parts List P8 Drive Section P8 Drive Section Parts List Table Part No. Description Comments GEAR 16T GEAR 19T SHAFT DRUM TORSION SPRING GEAR 108T GEAR 31T GEAR 25/42T Phaser® 6120 Color Laser Printer Service Manual 6-20...
  • Page 189 Print Engine Parts List P8 Drive Section Parts List Table (Continued) Part No. Description Comments GEAR 60T GEAR 15/90T GEAR 19T TORSION SPRING LEVER BRACKET ASSY 121E20250 PRESSURE RETRACTION SOLENOID, 2ND BTR (SL4) GEAR 20T RATCHET 604K35500 Part of Hardware Kit Phaser®...

  • Page 190: P9 Drive Section

    Print Engine Parts List P9 Drive Section P9 Drive Section Parts List Table Part No. Description Comments 127E15260 FUSER MOTOR (M7) BRACKET 121E20250 PRESSURE RETRACTION SOLENOID, CLN BLADE (SL3) HOLDER SHAFT GEAR 48T TORSION SPRING RATCHET Phaser® 6120 Color Laser Printer Service Manual 6-22...
  • Page 191 Print Engine Parts List P9 Drive Section Parts List Table (Continued) Part No. Description Comments WASHER GEAR 14/48T GEAR 14/32T GEAR 27/40T 604K35500 Part of Hardware Kit Phaser® 6120 Color Laser Printer Service Manual 6-23...

  • Page 192: P10 Drive Section

    Print Engine Parts List P10 Drive Section P 10 P10 Drive Section Parts List Table Part No. Description Comments 127E15270 MAIN MOTOR (M1) BRACKET ASSY 121E20270 REGISTRATION ROLLER SOLENOID (SL2) GEAR 20/117T DRUM RATCHET TORSION SPRING GEAR 24T GEAR 24T Phaser®...
  • Page 193 Print Engine Parts List P10 Drive Section Parts List Table (Continued) Part No. Description Comments SHAFT GEAR 52T GEAR 14/33T GEAR 20/117T GEAR 91T 604K35500 Part of Hardware Kit Phaser® 6120 Color Laser Printer Service Manual 6-25...

  • Page 194: P11 Drive Section

    Print Engine Parts List P11 Drive Section P 11 P11 Drive Section Parts List Table Part No. Description Comments SHAFT TENSION SPRING 807E17730 GEAR 24T BALL BEARING LEVER GEAR 35T STAY BRACKET 127E15280 DEVELOPER MOTOR (M3) GEAR 20/73T 127E15290 RACK MOTOR (M2) Phaser®...
  • Page 195 Print Engine Parts List P11 Drive Section Parts List Table (Continued) Part No. Description Comments BRACKET ASSY GEAR 19/48T 604K35500 Part of Hardware Kit Phaser® 6120 Color Laser Printer Service Manual 6-27...

  • Page 196: P12 Laser (Ph) Section

    Print Engine Parts List P12 Laser (PH) Section P 12 P12 PH Section Parts List Table Part No. Description Comments 122K02590 LASER (PH) UNIT PRESSURE SPRING HOLDER 110E19940 TONER CRUM CONTACT SWITCH (S5) HOLDER 011E20120 LEVER BRACKET COVER LEVER TENSION SPRING LEVER Phaser®...
  • Page 197 Print Engine Parts List P12 PH Section Parts List Table (Continued) Part No. Description Comments 604K35500 Part of Hardware Kit Phaser® 6120 Color Laser Printer Service Manual 6-29...

  • Page 198: P13 Transfer Section

    Print Engine Parts List P13 Transfer Section P 13 P13 Transfer Section Parts List Table Part No. Description Comments SPACER LEVER TENSION SPRING 826E27450 SHOULDER SCREW STOPPER RING GEAR 19T GEAR 28T GEAR 20T 023E30890 TRANSFER BELT HOLDER HOLDER Phaser® 6120 Color Laser Printer Service Manual 6-30...
  • Page 199 Print Engine Parts List P13 Transfer Section Parts List Table (Continued) Part No. Description Comments LEVER 604K35500 Part of Hardware Kit Phaser® 6120 Color Laser Printer Service Manual 6-31...

  • Page 200: P14 Transfer Roller Section

    Print Engine Parts List P14 Transfer Roller Section P 14 P14 Transfer Roller Section Parts List Table Part No. Description Comments 826E27460 SHOULDER SCREW 005E23460 COLLAR 059E05450 TRANSFER ROLLER Item 3 only NETURALIZING MEMBER HOLDER 809E71890 PRESSURE SPRING 019E74400 HOLDER Phaser®...
  • Page 201 Print Engine Parts List P14 Transfer Roller Section Parts List Table (Continued) Part No. Description Comments 807E17740 GEAR 16T 809E71900 PRESSURE SPRING SPACER GUIDE ROLL 019E74410 HOLDER 101E23500 CONDUCTIVE CAP CONTACT 809E71910 PRESSURE SPRING CONTACT RESISTOR RESISTOR CONTACT 604K35500 Part of Hardware Kit Phaser®...

  • Page 202: P15 Vertical Transport Section

    Print Engine Parts List P15 Vertical Transport Section P 15 PC2A P15 Vertical Transport Section Parts List Table Part No. Description Comments HOLDER 130E11800 SENSOR PC1=REGISTRATION SENSOR PC5=RETRACTION POS SENSOR, 2ND IMAGE TRANSFER PC8=FUSING SENSOR (PAPER LOOP) CONTACT CONTACT CONTACT HOLDER Phaser®...
  • Page 203 Print Engine Parts List P15 Vertical Transport Section Parts List Table (Continued) Part No. Description Comments SLIDER EARTH GROUND TORSION SPRING ROLLER GEAR 28T GUIDE GUIDE DUCT 120E29270 ACTUATOR FUSING SENSOR 130E11820 OHP SENSOR (PC2A) 120E29280 ACTUATOR REGISTRATION SENSOR TENSION SPRING SEAL 604K35500 Part of Hardware Kit...

  • Page 204: P16 Fusing Unit

    Print Engine Parts List P16 Fusing Unit P 16 P16 Fusing Unit Parts List Table Part No. Description Comments GUIDE TORSION SPRING LEVER SEAL CAUTION HOT ROLL BRACKET LABEL THERMISTOR BRACKET BUSHING REINFORCE PLATE COVER SEAL Phaser® 6120 Color Laser Printer Service Manual 6-36...
  • Page 205 Print Engine Parts List P16 Fusing Unit Parts List Table (Continued) Part No. Description Comments BRACKET BUSHING TORSION SPRING LEVER 126K23190 FUSING UNIT 120V Includes all parts shown within the dotted line. 126K23200 FUSING UNIT 230V GUIDE EXIT SENSOR (PC7) 120E29290 ACTUATOR EXIT SENSOR...

  • Page 206: P17 Electrical Components

    Print Engine Parts List P17 Electrical Components P 17 PWB-A PWB-P P17 Electrical Components Parts List Table Part No. Description Comments 960K25460 PWB-P (Image Processor) 960K25470 PWB-A (Engine Control Board) 962K49980 WIRE HARNESS ASSY 105E18500 POWER SUPPLY (100/120V) Power Unit (PU) 105E18510 POWER SUPPLY (220/240V) Power Unit (PU)
  • Page 207 Print Engine Parts List P17 Electrical Components Parts List Table (Continued) Part No. Description Comments 105E18520 HIGH VOLTAGE POWER HV Board SUPPLY 110E19910 POWER-SWITCH (S1) BRACKET 110E19920 FUSING SAFEY SWITCH (S3) 604K35500 Part of Hardware Kit Phaser® 6120 Color Laser Printer Service Manual 6-39...

  • Page 208: P18 Paper Take-Up Section

    Print Engine Parts List P18 Paper Take-Up Section P 18 P18 Paper Take-Up Section Parts List Table Part No. Description Comments BRACKET 120E29300 ACTUATOR TRAY 1 EMPTY SENSOR BRACKET 130E11840 TEMP/HUMIDITY SENSOR Does not include holder. (HS1) HOLDER 130E11800 TRAY 1 EMPLTY SENSOR (PC9) 809E71920 PRESSURE SPRING...

  • Page 209: P19 Paper Take-Up Section 2

    Print Engine Parts List P19 Paper Take-Up Section 2 P 19 P19 Paper Take-Up Section 2 Parts List Table Part No. Description Comments 130K74270 PAPER TAKE-UP ASSY Includes all parts shown with the dotted lines. ROLLER GUIDE PRESSURE SPRING HOLDER ROLL BUSHING 019K13070...
  • Page 210 Print Engine Parts List P19 Paper Take-Up Section 2 Parts List Table (Continued) Part No. Description Comments TENSION SPRING FRICTION SHEET PLATE SPRING GEAR 27T 059E05460 ROLLER STOPPER SHAFT GEAR 27T BRACKET 121E20250 TRAY 1 PAPER PICK SOLENOID (SL1) SHIELD DRUM RATCHET TORSION SPRING...

  • Page 211: P20 Paper Take-Up Section 3

    Print Engine Parts List P20 Paper Take-Up Section 3 P 20 P20 Paper Take-Up Section 3 Parts List Table Part No. Description Comments 053K04740 TRAY 1 Includes all parts within the dotted lines. Regulating plate assembly. FRICTION SHEET LIFTING PLATE REGULATING PLATE REGULATING PLATE LEVER...
  • Page 212 Print Engine Parts List P20 Paper Take-Up Section 3 Parts List Table (Continued) Part No. Description Comments 019E74430 HOLDER 604K35500 Part of Hardware Kit Phaser® 6120 Color Laser Printer Service Manual 6-44...

  • Page 213: P21 Wiring

    Print Engine Parts List P21 Wiring P 21 PJ3PU (PU) SW2-1 (S2) PJ8A PJ34 (PWB-A) (M1) SW2-2 (S2) PJ2A PJ4PU (PU) (PWB-A) (SL4) (SL2) PJ11A PJ3A (PWB-A) PJ6PU (PU) (PWB-A) CN4 (M7) PJ39 (SL3) (PC1) PJ10A PJ12A (PWB-A) (PWB-A) PJ40 (PC2) CN2 (M6) PJ31...

  • Page 214: P22 Wiring

    Print Engine Parts List P22 Wiring P 22 PJ16A PJ44 PJ9A (PWB-A) (PC9) (PWB-A) PJ41 (PC5) PJ14A PJ42 PJ17A (PWB-A) (PC8) (PWB-A) PJ15A PJ43 PJ18A PJ1HV (PWB-A) (HS1) (PWB-A) (HV) PJ22A PJ46 PJ23A (2nd Casette) (PWB-A) (S5) (PWB-A) P22 Wiring Parts List Table Part No.

  • Page 215: P23 Wiring

    Print Engine Parts List P23 Wiring P 23 PJ5PU PJ1CNT (PU) PJ1PU SW1-2 (PU) SW1-4 (S1) P23 Wiring Parts List Table Part No. Description Comments 962K50140 WIRE HARNESS ASSY PU<=>OP PANEL WIRE HARNESS ASSY 962K50150 WIRE HARNESS ASSY PWB-P<=>OP PANEL Phaser®...

  • Page 216: P24 Wiring Accessories

    Print Engine Parts List P24 Wiring Accessories L=104 11.5 16.2 14.4 11.5 P24 Wiring Parts List Table Part No. Description Comments WIRING SADDLE WIRING SADDLE 5.2H WIRING SADDLE 18.5H WIRING SADDLE 14.4H WIRING SADDLE 8.0H CABLE TIE 104L SO CLIP *Items 1-7 included in the hardware kit.

  • Page 217: P25 Accessories

    Print Engine Parts List P25 Accessories P 25 P25 Accessories Parts List Table Part No. Description Comments 117E29050 POWER CORD (120 V) 802E99630 COVER 050E23370 TRAY 802E99640 COVER Phaser® 6120 Color Laser Printer Service Manual 6-49...

  • Page 218: Miscellaneous Parts, Consumables, Maintenance Parts, And Options

    Print Engine Parts List Miscellaneous Parts, Consumables, Maintenance Parts, and Options Part No. Description Comments 604K35500 HARDWARE KIT 117E29060 CABLE ASSEMBLY, 3, 18AWG, 115V, 98, 0L 117E29070 CABLE, PWR, EURO, 220V, 99L9 117E29080 CABLE, PWR, U.K., 24OV, 96L 117E29090 CABLE, PWR, AUST, 24OV, 96L 117E29100 CABLE, PWR, SWISS, 220/ 24OV, 50 HZ...
  • Page 219 Print Engine Parts List Part No. Description Comments 108R00691 IMAGING UNIT 059E05450 TRANSFER ROLLER 023E30890 TRANSFER BELT 126K23190 FUSER (120 V) 126K23200 FUSER (220 V) 695K23070 REPACK KIT Phaser® 6120 Color Laser Printer Service Manual 6-51...
  • Page 220 Print Engine Parts List Phaser® 6120 Color Laser Printer Service Manual 6-52...

  • Page 221: This Section Contains

    Print Engine Theory of Operation This section contains: Parts of the Printer on page 7-2 Printer Paper Path on page 7-3 Imaging Section on page 7-6 Paper Feed Section on page 7-40 Image Stabilization Control (Density) and Output Process on page 7-54 Fan Airflow on page 7-57 Temperature/ Humidity Sensor...

  • Page 222: Parts Of The Printer

    Print Engine Theory of Operation Parts of the Printer Cross Section 4139to1590c0 Paper Feed Section Imaging Unit Section Write Section Transfer Belt (1st Transfer) Section Toner Cartridge Section Transfer Roller (2nd Transfer) Section Fusing section Phaser® 6120 Color Laser Printer Service Manual...

  • Page 223: Printer Paper Path

    Print Engine Theory of Operation Printer Paper Path 4139to1502c0 Image Creation Process [8] Paper Separation [7] 2nd Image Transfer [9] Transfer Belt Cleaning [6] 1st Image Transfer [3] Photo [10] PC Drum Cleaning conductor [5] Developing [4] Photo Conductor Charging [1] Printer Image Processing [2] Laser Exposure Name...

  • Page 224: Operation Sequence

    Print Engine Theory of Operation Name Function/System Developing The toner, negatively charged in the Hopper, is attracted onto the electrostatic latent image formed on the surface of the Photo Conductor. It is thereby changed to a visible, developed image. A Imaging Unit negative bias voltage is applied to the Developing Roller, thereby preventing toner from sticking to the background image portion.

  • Page 225: Control Block Diagram

    Print Engine Theory of Operation Control Block Diagram TC/Y TC/M TC/C TC/K Control Panel (PWB-OP) Mechanical Control Paper Pick-up/ Print Control Board (PWB-P) Board (PWB-A) transport Image processing Image process Fusing Power supply/ high voltage Write Unit (PH) Duplex Unit* Lower Feeder Unit* Control System Line Image Bus Line...

  • Page 226: Imaging Section

    Print Engine Theory of Operation Imaging Section Toner Cartridge Toner Cartridge 4139to1569c1 4139to2054e0 Toner Cartridge Drive Main Motor Drum Cartridge Photo Conductor Developing Motor Toner Cartridge 4139to2055e0 Drum Cartridge (Imaging Unit) Life Control The Imaging Unit offers the following life controls: Detecting a new Imaging Unit Resetting the life counter New Imaging Unit Detection...

  • Page 227: Reaching End Of Life

    Print Engine Theory of Operation There is a fuse inside the Imaging Unit and upon first use the life counter detects the blown fuse and resets. The image stabilization sequence is carried out upon detection of a new imaging unit. Reaching End of Life The life counter is reset when a new Imaging Unit is detected.

  • Page 228: Imaging Unit (Dc)

    Print Engine Theory of Operation Imaging Unit (DC) Drum Cartridge Photo Conductor 4139to1570c1 4139to2056e0 Charge Generating Layer Charge Transport Layer Aluminum Base 4139to2057e0 Imaging Unit Drive Main Motor Photo Conductor 4139to1058e0 Phaser® 6120 Color Laser Printer Service Manual...

  • Page 229: Imaging Unit (Dc) Control

    Print Engine Theory of Operation Imaging Unit (DC) Control Photo Conductor (OPC Drum) Drive Mechanism The Photo Conductor is driven by the Main Motor (M1). When the Main Motor (M1) is energized, it turns the drive gear, which in turn rotates the Photo Conductor.

  • Page 230: Imaging Unit Charge

    Print Engine Theory of Operation Imaging Unit Charge 4139to1570c1 4139to1523c0 4139to2010c1 Name Function/System Charge Deposits a charge to the surface of the Photo Conductor. Imaging Unit comb electrode Scorotron system Electrode Imaging Unit comb electrode Scorotron system Using the comb electrode ensures that the charge is concentrated on the grid mesh, thus reducing the amount of ozone produced.

  • Page 231: Charge Corona Unit On/Off Control

    Print Engine Theory of Operation Charge Corona Unit ON/OFF Control The grid voltage (Vg) is applied to the grid mesh and is controlled by image stabilization control. Standby Position Polygon Motor Energized Belt Positioning K Toner Developing Position Sensor Activated Rack Motor (M2) Developing Motor (M3) Main Motor (M1)

  • Page 232: Laser (Ph)

    Print Engine Theory of Operation Laser (PH) 4139to1568c0 4139to2001c1 4139to2002c0 Name Function/System SOS Mirror Condenses the incident laser light onto the SOS Sensor. G2 Lens Condenses the incident laser light, with which the Photo Conductor is irradiated. Semiconductor Laser Emits a laser light. Two-beam array LD SOS Sensor Produces an SOS signal using the incident laser light.
  • Page 233 Print Engine Theory of Operation Laser Operation The surface of the Photo Conductor is irradiated with a laser light and an electrostatic latent image is thereby formed. The Polygon Mirror has four faces. The machine uses a two-beam array Laser Diode (LD) to inhibit the speed of the Polygon Mirror.
  • Page 234 Print Engine Theory of Operation Laser Timing When a Ready signal is detected, a Laser ON signal is output from the PWB-P (Image Processor Board). The Laser ON signal triggers the firing of each laser Diode which illuminates the SOS Board via the Polygon Mirror, G1 Lens, Return Mirror, G2 Lens (SOS Lens), and SOS Mirror.

  • Page 235: Developing

    Print Engine Theory of Operation Developing 4139to1569c1 4139to2013c1 [10] [11] [12] 4139to1520c0 4139to1524c1 Phaser® 6120 Color Laser Printer Service Manual 7-15...

  • Page 236: Drive

    Print Engine Theory of Operation Name Function/System Main Motor (M1) Drives the Photo Conductor. Driven by the PWB-A (Engine Control Board). Brushless DC Motor. Developing Motor Drives the Developing Roller. (M3) Stepper motor. Hopper Loaded with toner that is conveyed onto the Developing Unit by way of the Conveyance Pipe.
  • Page 237 Print Engine Theory of Operation Developing Roller Drive The Developing Roller is driven by the Developing Motor (M3) and Intermediate Gear. When the Toner Cartridge Rack is stationery at the developing position, the Developing Roller Drive Gear comes into mesh with the Intermediate Gear. The Developing Roller is then rotated through the drive provided by the Developing Motor (M3) and Intermediate Gear.
  • Page 238 Print Engine Theory of Operation Toner Flow Toner stored in the Hopper is agitated by the Agitating Blade and conveyed into the Toner Supply Portion by the Conveyance Blade fitted to the leading edge of the Agitating Blade. The toner conveyed into the Toner Supply Portion is conveyed by the Supply Roller onto the Developing Roller.
  • Page 239 Print Engine Theory of Operation Developing System The machine employs the single-component, non-contact developing system. In the non-contact, single-component developing system, the magnetic brush does not rub the surface of the Photo Conductor (or the image). This prevents a foggy image from occurring and the Photo Conductor from being worn.
  • Page 240 Print Engine Theory of Operation Toner Cartridge Rack Drive The Toner Cartridge Rack is driven by the Rack Motor (M2). Rack Motor 4139to2066e0 Rack Motor 4139to2065e0 Toner Cartridge Rack Stop Position The Toner Cartridge Rack must be brought to a stop so that the Toner Cartridge of each color of toner is located at its correct position.
  • Page 241 Print Engine Theory of Operation Standby (Reference) Position The standby position is 45° before the developing position of the K Toner Cartridge. 45˚ Standby Position 4139to2067e0 Developing Position The developing position is where the Toner Cartridge Rack is rotated 45° from the standby position.

  • Page 242: Monochrome Printing Process

    Print Engine Theory of Operation Monochrome Printing Process Step 1 Step 2 Step 3 Step 4 Standby Position Rack is Rotated Monochrome Printing Standby Position 4139to2070e0 Operation Sequence The Toner Cartridge Rack is stationary at the standby position. When a print request is received from the controller, the Toner Cartridge Rack is rotated to bring the K Toner Cartridge to its developing position.
  • Page 243 Print Engine Theory of Operation Similarly, the Toner Cartridge Rack is rotated and development of C is carried out. Similarly, the Toner Cartridge Rack is rotated and development of K is carried out. When the development of K is completed, the Toner Cartridge Rack is rotated and brought to a stop at the standby position.
  • Page 244 Print Engine Theory of Operation Toner Cartridge Rack Developing Position To bring the Toner Cartridge Rack to a stop at the corresponding developing position, the rack is rotated from the standby position 45° through pulse control of the Rack Motor. Cartridge Replacement Position When a request is made for replacing the Toner Cartridge of a specific color of toner (by means of an input from the control panel, upon a toner empty condition, or through an input...

  • Page 245: Image Transfer

    Print Engine Theory of Operation Image Transfer 1st Transfer 4139to1571c1 4139to2019c0 4139to1514c0 Name Function/System Driven Roller Rotated as driven by the Transfer Belt. Transfer Belt The image of each color of toner is transferred from the 1st Transfer Roller to this Transfer Belt in the order of Y, M, C, and K, thereby forming a full color toner image.
  • Page 246 Print Engine Theory of Operation Transfer Drive 4139to2022c0 Main Motor (M1) Transfer Belt Drive Roller Image Transfer Belt 2nd Transfer Roller 1st Transfer Roller Transfer Belt Cleaning Mechanism A cleaning blade is used to remove residual toner from the surface of the transfer belt. The Cleaning Blade is pressed up against the Transfer Belt, thereby scraping residual toner off the surface of the Transfer Belt.
  • Page 247 Print Engine Theory of Operation Cleaning Blade Pressure/Retraction Mechanism During color printing, an image is formed on the Transfer Belt for each color of toner. The Cleaning Blade is therefore provided with a pressure/retraction mechanism. that moves the cleaning blade and applies pressure at the correct time. In monochrome printing, no retraction sequence is carried out.
  • Page 248 Print Engine Theory of Operation Transfer Timing Operation SL3 Energization Signal (after Main Motor has been energized) When power is turned ON: Main Motor (M1) Pressure/Retraction Solenoid To pressed position /Cleaning Blade (SL3) Retraction Position Sensor /Cleaning Blade (PC6) K print completed Y-TOD (CD Print Start signal for yellow) During print cycle: Main Motor (M1)
  • Page 249 Print Engine Theory of Operation Pressure Sequence When the Pressure/Retraction Solenoid /Cleaning Blade (SL3) is energized in the condition, in which the Cleaning Blade is retracted from the Transfer Belt, the pressure cam rotates a half turn. This pushes the lever backward. When the lever is pushed backward, the Cleaning Blade is returned.

  • Page 250: 2Nd Transfer Section

    Print Engine Theory of Operation 2nd Transfer Section 4139to1572c1 4139to2020c0 4139to1548c0 4139to2021c1 Name Function/system 2nd Transfer Roller Driven to rotate by the Transfer Belt. Pressure/Retraction Slider Moves via a gear coupled to it when the Pressure/Retraction Solenoid/2nd Image Transfer (SL4) is energized. Pressure/Retraction Roller When the Pressure/Retraction Slider moves, it comes into contact with this roller, which presses the 2nd Transfer Roller.
  • Page 251 Print Engine Theory of Operation 2nd Transfer Roller Pressure/Retraction Mechanism During color printing, the toner image of each color of toner is transferred to the Transfer Belt (a total of four times, once for each color). Pressure/retraction control with respect to the Transfer Belt is provided for the 2nd Transfer Roller.
  • Page 252 Print Engine Theory of Operation When the 2nd Transfer Assy is pushed up, the 2nd Transfer Roller is pressed up against the Transfer Belt. Pressure/Retraction Roller 2nd Transfer Assy Pressure/Retraction Solenoid/ 2nd Image Transfer Pressure Slider Pressure/Retraction Clutch Ribs 2nd Image Transfer 4139to2080e0 Retraction Sequence When the Pressure/Retraction Solenoid /2nd Image Transfer (SL4) is energized in the...
  • Page 253 Print Engine Theory of Operation 2nd Transfer Roller Cleaning Imaging Unit positive and negative transfer bias voltages are alternately applied to the 2nd Transfer Roller. This allows toner residue on the surface of the 2nd Transfer Roller to be transferred back to the Transfer Belt, thus cleaning the 2nd Transfer Roller. The toner transferred back to the Transfer Belt is collected by the Cleaning Blade.
  • Page 254 Print Engine Theory of Operation Neutralization and Separation of Paper (De-Tack) To neutralize the paper that has undergone the 2nd transfer process, a Charge Neutralizing Cloth is provided for the guide plate after the 2nd Transfer Roller. Charge Neutralizing Cloth Charge Neutralizing Cloth 2nd Transfer Roller Transfer Belt...
  • Page 255 Print Engine Theory of Operation ATVC (Auto Transfer Voltage Control) The ATVC, or Auto Transfer Voltage Control, is for optimizing the transfer output. A constant current is made to flow through each of the Transfer Rollers. From the detected voltage, the resistance of each of the 1st Transfer Roller, 2nd Transfer Roller, and Transfer Belt is measured.

  • Page 256: Toner Collecting

    Print Engine Theory of Operation Toner Collecting 4139to1573c0 4139to1536c0 Name Function/System Toner Collecting Screw (auger) Conveys waste toner scraped off by the Cleaning Blade to the Waste Toner Conveyance Unit. Waste Toner Conveyance Unit Conveys the waste toner fed by the Toner Collecting Screw into the Imaging Unit.

  • Page 257: Waste Toner Bin Drive Mechanism

    Print Engine Theory of Operation Waste Toner Bin Drive Mechanism 4139to2028c0 Toner Collecting Screw Toner Agitating Screw Transfer belt Main Motor (M1) Driven Roller Waste Toner Conveyance Unit Toner Collecting Mechanism Waste toner scraped off the transfer belt by the cleaning blade and scraped off by the Cleaning Blade of the Photo Conductor are conveyed by each of the Toner Collecting Screws into the Imaging Unit Waste Bin.
  • Page 258 Print Engine Theory of Operation Image Transfer Belt Unit Waste toner scraped off by the Cleaning Blade is collected by the Toner Collecting Screw for Transfer Belt. The waste toner collected by the Toner Collecting Screw is conveyed to the Imaging Unit by way of the Waste Toner Conveyance Unit.
  • Page 259 Print Engine Theory of Operation To prevent false detection, the Imaging Unit is provided with the Toner Agitating Screw that ensures that the waste toner is evenly stored. Waste Toner Detection Area Light Guide Waste Toner Near Full Detection Board (PWB-C) 4139to2086e0 Light Guide LED Light...

  • Page 260: Paper Feed Section

    Print Engine Theory of Operation Paper Feed Section 4139to2031c0 4139to1574c0 4139to1537c0 Name Function/System Paper Pick-Up Unit Tray1 paper tray, in which a paper stack is loaded Max. paper capacity Plain paper: 200 sheets Thick stock, OHP film, postcards, glossy stock, labels: 50 sheets Envelopes: 10 Tray1 Paper Empty Sensor...

  • Page 261: Paper Feed Drive

    Print Engine Theory of Operation Paper Feed Drive 4139to2032c0 Main Motor (M1) Pick-up Roller Tray1 Paper Pick-up Solenoid Paper Pick-up Clutch (SL1) Paper Feed Control Print Start Signal * C-TOD * C-TOD Main Motor (M1) Belt Positioning Sensor (PC4) Tray1 Paper Pick-up Solenoid (SL1) Registration Roller Solenoid (SL2) Registration Sensor (PC1) Exit Sensor (PC7)
  • Page 262 Print Engine Theory of Operation Paper Feed Mechanism When the Tray1 Paper Pick-up Solenoid (SL1) is energized, drive from the Main Motor (M1) is transmitted to the Pick-up Roller via the Paper Pick-up Clutch. The Pick-up Roller is then rotated. At the same time, the Lift Cam is rotated, which raises the Paper Lift Plate.
  • Page 263 Print Engine Theory of Operation Paper Empty Condition Detection The Tray1 Paper Empty Sensor (PC9) is located on the underside of Tray1, detecting the paper loaded in the tray. When there is paper loaded in the tray, the actuator drops into the tray, unblocking the sensor light.

  • Page 264: Registration Roller

    Print Engine Theory of Operation Registration Roller 4139to1542c0 4139to1575c0 4139to1563c0 Name Function/system Registration roller Moves the paper from the transport (or conveyance) roller to the transfer section. OHP Sensor (PC2A) Detects whether or not there is OHP film. Conveyance roller Conveys paper from Tray1 to the Registration Roller.

  • Page 265: Registration Roller Drive

    Print Engine Theory of Operation Registration Roller Drive 4139to2035c0 Registration Sensor (PC1) Actuator Registration Roller Control The Registration Sensor (PC1) detects whether or not the paper has reached the Conveyance Section. Conveyance of paper is restarted by synchronizing the paper conveyed with the image. Since the Conveyance Roller and Registration Roller are synchronized with each other, no loop is formed in the paper at the Registration Roller.
  • Page 266 Print Engine Theory of Operation controller when a print request is made does not match the results of OHP Sensor (PC2A) detection, the machine suspends the print cycle and displays a corresponding message on the control panel. OHP Sensor Registration Roller OHP Sensor Reflection Mirror 4139to2092e0...

  • Page 267: Fusing Section

    Print Engine Theory of Operation Fusing Section 4139to1546c0 4139to1576c0 4139to1565c0 4139to1547c0 Name Function/system Thermistor (TH1) Detects the temperature of the Heating Roller. Thermostat (TS1) Detects an abnormally high temperature of the Heating Roller. Exit Sensor (PC7) Detects the paper conveyed from the Fusing Pressure Roller and Fusing Roller.

  • Page 268: Fuser Drive

    Print Engine Theory of Operation Fuser Drive Fusing Motor Heating Roller 4139to2094e0 Heating Roller Drive Control Speed Change Control Drive for the Heating Roller is provided by the Fusing Motor (M7). To prevent fusing failure, the fusing speed is changed according to the media type in use. Speed Stabilization To prevent ghosting or smearing, the difference between the fusing speed and paper transport speed during image transfer is corrected.
  • Page 269 Print Engine Theory of Operation The sequence of these operations is repeated so that the fusing speed is changed automatically according to the loop length. This effectively makes for the difference between the fusing speed and paper conveyance speed during image transfer. 4139to1592c0 4139to1593c0 Fusing Temperature Control...
  • Page 270 Print Engine Theory of Operation Heater Lamp (H1) is turned OFF forcibly and the initiation of any new print cycle is prohibited (abnormally high temperature detection control). Hard Protection (Hard Stop) Circuitry within the PWB-A Controls a relay that shuts down the power supply to the Heater Lamp (H1) when an abnormal temperature is detected.

  • Page 271: Monochrome Ordinary/Low Environment

    Print Engine Theory of Operation Monochrome Ordinary/Low Environment The low temperature environment refers to the condition, in which the Temperature/Humidity Sensor (HS1) detects a temperature of less than 20° C. Length 210 mm 211 - 216 mm 217 - 257 mm 258 - 297 mm (8.2”) (8.3”...

  • Page 272: Paper Exit

    Print Engine Theory of Operation Paper Exit 4139to1577c0 4139to1576c0 4139to1578c0 Name Function/System Paper Exit Roller Feeds paper out of the machine onto the Paper Exit Tray. Driven by the Fusing Motor (M7). Exit Sensor (PC7) Detects a sheet of paper fed from the Heating Roller and Fusing Pressure Roller.

  • Page 273: Paper Exit Drive

    Print Engine Theory of Operation Paper Exit Drive 4139to1604c0 Paper exit roller Fusing Motor (M7) Phaser® 6120 Color Laser Printer Service Manual 7-53...

  • Page 274: Image Stabilization Control (Density) And Output Process

    Print Engine Theory of Operation Image Stabilization Control (Density) and Output Process To ensure that a stabilized output image is produced at all times, the following image stabilization controls are provided Purpose Control Detection To ensure stabilized ATVC Temperature/Humidity Sensor (HS1) transfer See the Transfer section on output...
  • Page 275 Print Engine Theory of Operation AIDC Sensor LED Intensity Control The following adjustment is made to correct any changes in characteristics occurring due to change with time and contamination of the AIDC Sensor (AIDC): the intensity of the LED is adjusted for the surface of the Transfer Belt on which no toner sticks, so that the output value of the AIDC Sensor (AIDC) becomes constant.

  • Page 276: Flowchart

    Print Engine Theory of Operation Flowchart Mode 1 Mode 2 ATVC control AIDC intensity control Control of the maximum Leak detection control amount of toner sticking Reflectance AIDC intensity control measurement control Reflectance Laser intensity control measurement control Control of the maximum amount of toner sticking Laser intensity control γ...

  • Page 277: Fan Airflow

    Print Engine Theory of Operation Fan Airflow Exhaust Suction Exhaust Ozone Filter 4139to2100e0 Name Function/System Power Supply Cooling Fan Cools the Power Unit (PU) and draws in outside air. Motor (M4) Ventilation Fan Motor (M6) Uses the Ozone Filter that removes ozone from the air drawn by this motor to the outside.

  • Page 278: Fan Control

    Print Engine Theory of Operation Fan Control Power Supply Cooling Fan Motor <Full-speed conditions> For the predetermined period of time after the Power Switch has been turned ON For the specified period of time up to the end of Energy Saver mode At the start of a print cycle (full-speed rotation after the lapse of a predetermined period of time of half-speed rotation).

  • Page 279: Temperature/ Humidity Sensor

    Print Engine Theory of Operation Temperature/ Humidity Sensor 4139to1594c0 Name Function/System Temperature/ Humidity Sensor Measures the temperature and humidity inside the (HS1) machine. Used for image stabilization control, ATVC, and fusing temperature control. Phaser® 6120 Color Laser Printer Service Manual 7-59...
  • Page 280 Print Engine Theory of Operation Phaser® 6120 Color Laser Printer Service Manual 7-60...
  • Page 281 Optional Lower Tray Unit (500-Sheet Feeder) This section contains: General Information and Specifications on page 8-2 Maintenance on page 8-3 Service Parts Disassembly on page 8-4 Troubleshooting on page 8-10 Theory of Operation on page 8-13 Lower Feeder Unit Parts List on page 8-16 Phaser®...

  • Page 282: General Information And Specifications

    General Information and Specifications General Information and Specifications Option Specifications Media Specifications Paper Size A4/Letter Paper Type Plain paper: 60 to 90 g/m (16 to 24 lb) Recycled paper: 60 to 90 g/m (16 to 24 lb) Capacity 500 sheets of 20 lbs. Machine Specifications DC 24 V ±...

  • Page 283: Maintenance

    Maintenance Maintenance Maintenance Parts Pick-Up Roller Cleaning Procedure Remove the Lower Feeder Unit from the main unit. Wipe the Pick-up Roller [1] clean of dirt using a soft cloth dampened with water. 4056fs2501c0 Removal Procedure Remove the Lower Feeder Unit from the main unit. Remove two Pick-up Rollers [1].

  • Page 284: Service Parts Disassembly

    Service Parts Disassembly Service Parts Disassembly Variable Resistors on Board Do not turn the variable resistors on boards for which no adjusting instructions are given in Adjustment/Setting. Removal of PWBs When removing a circuit board or other electrical component, refer to “Handling of PWBs”...

  • Page 285: Lower Feeder Unit

    Service Parts Disassembly Lower Feeder Unit Note: Whenever removing or reinstalling the Lower Feeder Unit, be sure first to unplug the power cord of the printer from the power outlet. Lift the printer main body and then remove the Lower Feeder Unit [1] from the printer. 4056fs2504c0 Tray Remove the Lower Feeder Unit from the main unit.

  • Page 286: Lower Feeder Rear Cover

    Service Parts Disassembly Lower Feeder Rear Cover Slide out the Tray, see Tray on page 8-5. Remove four screws [1], and remove the Lower Feeder Unit Rear Cover [2]. 4056fs2505c0 Lower Feeder Paper Pick-Up Unit Remove the Lower Feeder Unit Rear Cover, see Lower Feeder Rear Cover on page 8-6.

  • Page 287: Lower Feeder Board (Pwb-A Pf)

    Service Parts Disassembly Remove one screw [4] and the metal plate [5]. 4056fs2005c0 Remove five screws [6] and the Lower Feeder Paper Pick-up Unit [7]. 4056fs2006c1 Lower Feeder Board (PWB-A PF) Remove the Lower Feeder Paper Pick-up Unit, see Lower Feeder Paper Pick-Up Unit page 8-6.

  • Page 288: Lower Feeder Paper Pick-Up Solenoid (Sl7 Pf)

    Service Parts Disassembly Remove two screws [4] and the Lower Feeder Board [5]. 4056fs2002c1 Lower Feeder Paper Pick-Up Solenoid (SL7 PF) Remove the Lower Feeder Paper Pick-up Unit, see Lower Feeder Paper Pick-Up Unit page 8-6. Disconnect one connector [1]. Remove one screw [2] and the Protective Cover [3].

  • Page 289: Tray Set Detecting Switch (S4 Pf)

    Service Parts Disassembly Tray Set Detecting Switch (S4 PF) Remove the Lower Feeder Paper Pick-up Unit, see Lower Feeder Paper Pick-Up Unit page 8-6. Unlock two tabs [1], disconnect one connector [2] and remove the Tray Set Detecting Switch [3]. 4056fs2007c0 Phaser®...

  • Page 290: Troubleshooting

    Troubleshooting Troubleshooting Jam and Misfeed Messages Jam and Misfeed Display When a paper jam or misfeed occurs a message is displayed on the Control Panel display. PAPER JAM PAPER JAM TRAY 2 TRAY 2 4537fs4503e0 Misfeed clearing Display Misfeed location location Ref.

  • Page 291: Sensor Layout Diagram

    Troubleshooting Sensor layout Diagram (shown with the optional Lower Feeder Unit and Duplex Unit) 4139fs4508c0 Exit Sensor Duplex Paper Loop Sensor PC10 DU Fusing Paper Loop Sensor Registration Sensor Duplex Transport Sensor PC12 Phaser® 6120 Color Laser Printer Service Manual 8-11...

  • Page 292: Jam And Misfeed Troubleshooting Procedures

    Troubleshooting Jam and Misfeed Troubleshooting Procedures Initial Actions When a paper misfeed occurs, first check the following. Check Item Action Does the paper meet product specifications? Change the paper. Is paper curled, wavy, or damp? Change the paper. Instruct the user in correct paper storage. Is a foreign object present along the paper path, or is Clean or change the paper path.

  • Page 293: Theory Of Operation

    Theory of Operation Theory of Operation Lower Feeder Unit Drive 4057to2510c0 4057fs2501c0 4056to2502c0 Name Function/system Lower Feeder Board (PWB-A PF) Controls the Lower Feeder Unit. Lower Feeder Paper Empty Sensor Detects the level of the paper still available for use in the (PC13 PF) Lower Feeder Unit.

  • Page 294: Conveyance Drive Mechanism

    Theory of Operation Lower Feeder Unit Drive 4056to2503c0 Conveyance Drive Mechanism The Lower Feeder Unit is not provided with any drive motor. The driving force for paper feeding and conveyance (drive from M1) is transmitted through a coupling gear from the printer.

  • Page 295: Paper Empty Detection

    Theory of Operation Paper Empty Detection The Lower Feeder Paper Empty Sensor (PC13 PF) of the Lower Feeder Board (PWB-A PF) detects a paper empty condition in the Lower Feeder Unit. When there is paper loaded in the Lower Feeder Unit, the actuator is raised, which unblocks the sensor.

  • Page 296: Lower Feeder Unit Parts List

    Lower Feeder Unit Parts List Using the Parts List Changes to Xerox products are made to accommodate improved components as they become available. As improvements are made, part numbers may change from those appearing in this section. To get the latest part, provide the following information when ordering:...

  • Page 297: P1 Housing

    P1 Housing P1 Housing P1 Housing Parts List Table Part No. Description Comments REAR COVER BRACKET ASSY 107E11450 RUBBER FOOT 1 per part number BRACKET FRAME RIGHT COVER ACTUATOR PRESSURE SPRING ROLL SHAFT Phaser® 6120 Color Laser Printer Service Manual 8-17...
  • Page 298 P1 Housing P1 Housing Parts List Table (Continued) Part No. Description Comments BASE FRAME PLATE LEFT COVER 604K35500 Part of Hardware Kit Phaser® 6120 Color Laser Printer Service Manual 8-18...

  • Page 299: P2 Paper Take-Up Section

    P2 Paper Take-Up Section P2 Paper Take-Up Section PWB-A PF S4 PF 22 6 SL7 PF P2 Paper Take-Up Section Parts List Table Part No. Description Comments ROLLER GUIDE EARTH GROUND GUIDE GUIDE BUSHING EARTH GROUND COVER 960K25600 PWB-A PF Phaser®...
  • Page 300 P2 Paper Take-Up Section P2 Paper Take-Up Section Parts List Table (Continued) Part No. Description Comments 059E05470 PICK ROLLER 1 per part number Always order a quantity of 2 for this part. SHAFT 110E19930 SWITCH (DETECT) S4 BRACKET SHAFT BUSHING 121E20310 TRAY 2 PICK-UP SOLENOID (SL7)

  • Page 301: P3 Paper Cassette Section

    P3 Paper Cassette Section P3 Paper Cassette Section P3 Paper Cassette Section Parts List Table Part No. Description Comments 050E23380 CASSETTE (A4) 050E23390 CASSETTE (A3, Letter) COVER COLLAR TORSION SPRING PRESSURE SPRING CUSHION GUIDE SEPARATOR WASHER Phaser® 6120 Color Laser Printer Service Manual 8-21...
  • Page 302 P3 Paper Cassette Section P3 Paper Cassette Section Parts List Table (Continued) Part No. Description Comments CUSHION REGULATING PLATE SPACER LABEL CASSETTE GUIDE SEPARATOR LIFTING PLATE FRICTION PLATE LOCK LEVER 604K35500 Part of Hardware Kit Phaser® 6120 Color Laser Printer Service Manual 8-22...

  • Page 303: P4 Wiring

    P4 Wiring P4 Wiring CN22S CN24B CN3A CN4S P4 Wiring Parts List Table Part No. Description Comments WIRE HARNESS ASSY WIRE HARNESS ASSY Phaser® 6120 Color Laser Printer Service Manual 8-23...

  • Page 304: P5 Accessories

    P5 Accessories P5 Accessories P5 Accessories Parts List Table Part No. Description Comments 604K35500 Part of Hardware Kit WIRING SADDLE 604K35500 Part of Hardware Kit EDGE COVER 8.5H Phaser® 6120 Color Laser Printer Service Manual 8-24...

  • Page 305: Duplex Unit

    Duplex Unit This section contains the following: General Information and Specifications on page 9-2 Maintenance on page 9-3 Service Parts Disassembly on page 9-4 Sensor Layout on page 9-14 Jam and Misfeed Troubleshooting on page 9-15 Error Code Troubleshooting on page 9-18 Theory of Operation on page 9-20 Parts List - Duplex Unit Option...

  • Page 306: General Information And Specifications

    General Information and Specifications General Information and Specifications Product Specifications Media Specifications Paper Size A4/Letter Paper Type Plain paper: 60 to 90 g/m (16 to 24 lb.) Note: Duplex Unit: Only plain paper and recycled paper weighing 75 to 90 g/m (20 to 24 lb.) can be fed through the unit.

  • Page 307: Maintenance

    Maintenance Maintenance Maintenance Parts Transport Roller Cleaning Procedure Open the Duplex Door. Using a soft cloth dampened with water, wipe the Transport Roller [1] clean of dirt. 4057fs2501c0 Phaser® 6120 Color Laser Printer Service Manual...

  • Page 308: Service Parts Disassembly

    Service Parts Disassembly Service Parts Disassembly Disassembly and Adjustment Notes Variable Resistors on Board Do not turn the variable resistors on boards for which no adjusting instructions are given in Adjustment/Setting. Removal of PWBs When removing a circuit board or other electrical component, refer to “Handling of PWBs”...

  • Page 309: Duplex Unit

    Service Parts Disassembly Duplex Unit Note: Whenever removing or reinstalling the Duplex Unit, be sure first to unplug the power cord of the printer from the power outlet. Open the Duplex Unit Door. Turn the two locking knobs [1] to unlock the Duplex Unit. 4057fs2502c0 Remove the Duplex Unit [2].
  • Page 310 Service Parts Disassembly Reinstall Procedure Open the Duplex Unit Door [1] and turn the two locking knobs [2] to unlock the Duplex Unit. 4057fs2504c0 Mount the Duplex Unit [3] onto the printer main body. 4057fs2505c0 Phaser® 6120 Color Laser Printer Service Manual...
  • Page 311 Service Parts Disassembly Turn the two locking knobs [4] to lock the Duplex Unit into position. Note: When locking the Duplex Unit into position, be sure to hold the unit with a hand and, at the same time, press it up against the printer main body. 4057fs2506c0 Note: After the Duplex Unit has been locked into position, check that the two locking...

  • Page 312: Right Cover

    Service Parts Disassembly Right Cover Remove one screw [1], unlock three tabs [2] and remove the Right Cover [3]. 4057fs2508c0 Duplex Board (PWB-A DU) Remove the Right Cover. See Right Cover on page 9-8. Remove one screw [1] and the Duplex Board Cover [2]. 4057fs2509c0 Disconnect all connectors from the Duplex Board [3].

  • Page 313: Duplex Cooling Fan Motor (M10 Du)

    Service Parts Disassembly Remove three screws [4] and the Duplex Board [5]. 4057fs2511c0 Duplex Cooling Fan Motor (M10 DU) Remove the Right Cover. See Right Cover on page 9-8. Open the Duplex Door [1] and disconnect the connector [2]. 4057fs2516c0 Phaser®...
  • Page 314 Service Parts Disassembly Remove one screw [3]. 4057fs2517c0 Unhook the two dowel pins [4] and remove the Duplex Unit Door [5]. 4057fs2518c0 Remove one screw [6], unlock one tab [7] and remove the Harness Cover [8]. 4057fs2519c0 Phaser® 6120 Color Laser Printer Service Manual 9-10...
  • Page 315 Service Parts Disassembly Remove two screws [9], unlock two tabs [10] and remove the Duplex Door Upper Cover [11]. [10] [11] 4057fs2520c0 Unlock four tabs [12] and remove the Duplex Cooling Fan Motor Assy [13]. [12] [12] [13] 4057fs2521c0 Remove the Duplex Cooling Fan Motor Cover [14]. [14] 4057fs2522c0 Phaser®...

  • Page 316: Duplex Transport Motor (M8 Du)

    Service Parts Disassembly Unlock three tabs [15] and remove the Duplex Cooling Fan Motor [16]. [15] [15] [16] 4057fs2523c0 Duplex Transport Motor (M8 DU) Remove the Right Cover. See Right Cover on page 9-8. Remove two screws [1] and disconnect the connector [2]. Remove the harness from the harness holder [3] and then remove the Duplex Transport Motor [4].

  • Page 317: Duplex Registration Solenoid (Sl6 Du)

    Service Parts Disassembly Remove two screws [1], disconnect the connector [2], and remove the Duplex Reverse Motor [3]. 4057fs2513c0 Duplex Registration Solenoid (SL6 DU) Remove the Right Cover. See Right Cover on page 9-8. Disconnect the connector [1]. Remove one screw [2] and the Protective Cover [3]. 4057fs2514c0 Remove the Duplex Registration Solenoid [4].

  • Page 318: Sensor Layout

    Sensor Layout Sensor Layout (shown with the Lower Feeder Unit and Duplex Unit) 4139fs4508c0 Exit Sensor Duplex Paper Loop Sensor PC10 Fusing Paper Loop Sensor PC8 Registration Sensor Duplex Transport Sensor PC12 Phaser® 6120 Color Laser Printer Service Manual 9-14...

  • Page 319: Jam And Misfeed Troubleshooting

    Jam and Misfeed Troubleshooting Jam and Misfeed Troubleshooting Jam and Misfeed Messages Jam and Misfeed Display When a paper misfeed occurs a message is displayed on the Control Panel. PAPER JAM DUPLEX 4538fs4503e0 Display Misfeed location Misfeed clearing location Ref. page PAPER JAM Duplex Unit reverse drive/storage section Duplex Unit Door...

  • Page 320: Jam And Misfeed Troubleshooting Procedures

    Jam and Misfeed Troubleshooting Jam and Misfeed Troubleshooting Procedures Initial Actions When a paper misfeed occurs, first check the following initial check items. Check Item Action Does the paper meet product specifications? Change the paper. Is paper curled, wavy, or damp? Change the paper.

  • Page 321: Misfeed At Duplex Unit Paper Feed Section

    Jam and Misfeed Troubleshooting Misfeed at Duplex Unit Paper Feed Section Detection Timing Type Description Detection of misfeed at The Duplex Paper Loop Sensor (PC10 DU) is not unblocked even after the Duplex Unit paper feed lapse of a predetermined period of time after a Duplex paper feed sequence section has been started.

  • Page 322: Error Code Troubleshooting

    Error Code Troubleshooting Error Code Troubleshooting Error Code Messages Verifying an Error Message When a malfunction occurs, the printer displays the corresponding error indicator and status message on the control panel. Control Panel Status Message Example The printer’s CPU performs self-diagnostics that detect a malfunction and displays the corresponding error code on the Control Panel.

  • Page 323: Actions

    Error Code Troubleshooting Actions Relevant Electrical Parts Duplex Cooling Fan Motor (M10 DU) Duplex Board (PWB-A DU) WIRING DIAGRAM Location (Electrical Step Action Control Signal Component) Check the M10 connector for proper connection and correct as necessary. Check the fan for possible overload and correct as necessary.

  • Page 324: Theory Of Operation

    Theory of Operation Theory of Operation Duplex Unit 4057to2504c0 4057to2500c0 [11] [10] 4057to2503c0 4057to2505c0 Name Function/System Duplex Unit Transport Roller 1 Conveys paper in the Duplex Unit. Driven by the Duplex Transport Motor. Duplex Registration Roller Starts feeding the paper from the Duplex Unit so that the paper is correctly synchronized with the image on the Duplex Unit Transport Roller 2 Transfer Belt.

  • Page 325: Duplex Unit Drive

    Theory of Operation Duplex Unit Drive 4057to2506c0 Duplex Reverse Motor (M9 DU) Duplex Registration Roller Duplex Transport Motor (M8 DU) Duplex Unit Transport Roller 1 Duplex Unit Transport Roller 2 Switchback Mechanism The Paper Exit Roller of the main unit is used to subject the 1-sided print to a switchback sequence so that the 1-sided print is to be transported through the Duplex Unit.

  • Page 326: Paper Exit Roller Drive Coupling

    Theory of Operation Paper Exit Roller Drive Coupling When the Duplex Unit is mounted, the gear assy of the Fusing Unit is raised by the leading edge of the Duplex Unit lever, thereby disconnecting drive from the machine (Fusing Roller). The Paper Exit Roller is driven by the Duplex Reverse Motor.

  • Page 327: Duplex Unit Transport Motor Control

    Theory of Operation Duplex Unit Transport Motor Control Rotation of the Duplex Unit Transport Motor is controlled by the signals output from the Duplex Control Board. Duplex Unit Loop Correction Control A loop correction mechanism is provided to prevent skew from occurring in the second page.
  • Page 328 Theory of Operation Operations in 2-sided Printing with a Single Sheet of Paper Resident in the System Operation 1 Paper Exit Roller The first sheet of paper is taken up and fed in from the main unit drawer and the main unit starts the first print cycle to produce the print image of the second page of the original.

  • Page 329: Two A4 Originals With A Single Sheet Of Paper Resident In The System

    Theory of Operation Two A4 Originals with a Single Sheet of Paper Resident in the System Belt Positioning Sensor (PC4) Registration Sensor (PC1) Exit Sensor (PC7) Forward Backward Forward Rotation Rotation Rotation Duplex Reverse Motor (M9 DU) Duolex Transport Motor (M8 DU) Duplex Registration Solenoid (SL6 DU)

  • Page 330: Operations In 2-Sided Printing With Two Sheets Of Paper Resident In The System

    Theory of Operation Operations in 2-Sided Printing with Two Sheets of Paper Resident in the System Operation 1 Paper Exit Roller The first sheet of paper is taken up and fed in from the main unit drawer and the main unit starts the first print cycle to produce the print image of the second page of the original.
  • Page 331 Theory of Operation Operation 5 While feeding the first 2-sided print out, main unit produces the print image of the 6th page of the original on the third sheet of paper. The second sheet of paper waits at the Duplex take-up position until the third sheet of paper is subjected to a switchback sequence.

  • Page 332: 2-Sided Printing Of Two A4 Originals With Two Sheets Of Paper Resident In The System

    Theory of Operation 2-sided Printing of Two A4 Originals with Two Sheets of Paper Resident in the System Belt Positioning Sensor (PC4) Registration Sensor (PC1) Exit Sensor (PC7) Forward Backward Forward Backward Forward Backward Forward Backward Forward Duplex Reverse Motor Rotation Rotation Rotation...

  • Page 333: Parts List - Duplex Unit Option

    9-36 Using the Parts List Changes to Xerox products are made to accommodate improved components as they become available. As improvements are made, part numbers may change from those appearing in this section. To get the latest part, provide the following information when ordering:...

  • Page 334: P1 Duplex Unit

    P1 Duplex Unit P1 Duplex Unit M8 DU PC11 DU M9 DU PC12 DU PWB-A DU PC10 DU P1 Duplex Unit Parts List Table Part No. Description Comments TOP COVER 011E20130 LEVER PRESSURE SPRING GEAR 33/50T GEAR 12/47T 127E15300 DUPLEX MOTOR M8/M9 DU GEAR 16/27T GEAR 16T...
  • Page 335 P1 Duplex Unit P1 Duplex Unit Parts List Table (Continued) Part No. Description Comments 130E11800 DUPLEX SENSOR (PC10, 11, PC10=Paper Loop Sensor PC11=Door Sensor PC12= Transport Sensor BRACKET ASSY BRACKET RIGHT COVER SHOULDER SCREW PLATE SPRING TORSION SPRING 120E29310 ACTUATOR Paper Loop Sensor SHIELD 960K25590...

  • Page 336: P2 Duplex Unit

    P2 Duplex Unit P2 Duplex Unit M10 DU P2 Duplex Unit Parts List Table Part No. Description Comments COVER HOLDER SEAL SEAL 127E15240 DUPLEX COOLING FAN M10 DU COVER COVER 604K35500 Part of the Hardware Kit Phaser® 6120 Color Laser Printer Service Manual 9-32...

  • Page 337: P3 Duplex Unit

    P3 Duplex Unit P3 Duplex Unit SL6 DU P3 Duplex Unit Parts List Table Part No. Description Comments BUSHING ROLLER ROLL PLATE SPRING GEAR 20T GEAR 28T GEAR 13/53T GEAR 33/50T GEAR 23/29T DRUM RATCHET WHEEL Phaser® 6120 Color Laser Printer Service Manual 9-33...
  • Page 338 P3 Duplex Unit P3 Duplex Unit Parts List Table (Continued) Part No. Description Comments TORSION SPRING GEAR 26T SHIELD 121E20270 DUPLEX REGISTRATION SL6 DU SOLENOID TENSION SPRING BUSHING BUSHING PLATE SPRING SPRING ROLLER ROLLER 604K35500 Part of the Hardware Kit Phaser®...

  • Page 339: P4 Wiring

    P4 Wiring P4 Wiring CN13 PJ2A PJ1A (M9 DU) CN12 (PWB-A DU) (PWB-A DU) (M8 DU) PJ5A PJ52 PJ4A PJ51 (PWB-A DU) (PC12 DU) (PWB-A DU) (PC11 DU) CN14 PJ3A (M10 DU) (PWB-A DU) CN11 (SL6 DU) PJ50 (PC50 DU) P4 Wiring Parts List Table Part No.

  • Page 340: P5 Accessories

    P5 Accessories P5 Accessories P5 Accessories and Jigs Parts List Table Part No. Description Comments WIRING SADDLE EDGE COVER 8.5H Phaser® 6120 Color Laser Printer Service Manual 9-36...

  • Page 341: Wiring

    Wiring This section contains the following: Control Block Diagram on page 10-2 Wiring Diagram Legend on page 10-2 PWB-A (Engine Control Board) on page 10-4 PWB-P (Image Processor Board) on page 10-5 Image Transfer Section on page 10-6 Fusing, Transport, and Paper Exit Section on page 10-7 Tray and Developing Toner Replenishing Section on page 10-8...

  • Page 342: Control Block Diagram

    Use the alpha-numeric grid locators contained in the Overall Wiring Diagram on page 10-3 to locate the specific section needed, and then go to the corresponding pages for larger versions of that section. Control Block Diagram Wiring Diagram Legend Phaser® 6120 Color Laser Printer Service Manual 10-2...

  • Page 343: Overall Wiring Diagram

    Overall Wiring Diagram Phaser® 6120 Color Laser Printer Service Manual 10-3...

  • Page 344: Pwb-A (Engine Control Board)

    PWB-A (Engine Control Board) Phaser® 6120 Color Laser Printer Service Manual 10-4...

  • Page 345: Pwb-P (Image Processor Board)

    PWB-P (Image Processor Board) Phaser® 6120 Color Laser Printer Service Manual 10-5...

  • Page 346: Image Transfer Section

    Image Transfer Section Phaser® 6120 Color Laser Printer Service Manual 10-6...

  • Page 347: Fusing, Transport, And Paper Exit Section

    Fusing, Transport, and Paper Exit Section Phaser® 6120 Color Laser Printer Service Manual 10-7...

  • Page 348: Tray And Developing Toner Replenishing Section

    Tray and Developing Toner Replenishing Section Phaser® 6120 Color Laser Printer Service Manual 10-8...
  • Page 349 Toner Collection, Laser, (PH), and Panel Section Phaser® 6120 Color Laser Printer Service Manual 10-9...

  • Page 350: Power Supply Section

    Power Supply Section Phaser® 6120 Color Laser Printer Service Manual 10-10...

  • Page 351: Duplex/Lower Feed Unit Printer Connections

    Duplex/Lower Feed Unit Printer Connections Phaser® 6120 Color Laser Printer Service Manual 10-11...

  • Page 352: Lower Feed Board

    Lower Feed Board Phaser® 6120 Color Laser Printer Service Manual 10-12...

  • Page 353: Duplex Unit Board

    Duplex Unit Board Phaser® 6120 Color Laser Printer Service Manual 10-13...
  • Page 354 Phaser® 6120 Color Laser Printer Service Manual 10-14...

  • Page 355: Appendix

    Appendix Parts Layout Drawing Main Unit 4139fs5507c0 LVPS (PU) Waste Toner Near Full Detection Board (PWB-C) Control Panel (PWB-OP) PWB-P (Image Processor Board) Laser (PH) Unit PWB-A (Engine Control Board) High Voltage Unit (HV) Phaser® 6120 Color Laser Printer Service Manual...
  • Page 356 Parts Layout Drawing [10] 4139fs5502c0 Fusing Motor (M7) Rack Motor (M2) Pressure/Retraction Solenoid /Cleaning Registration Roller Solenoid (SL2) Blade (SL3) Main Motor (M1) Tray1 Paper Pick-up Solenoid (SL1) Ventilation Fan Motor (M6) Power Supply Cooling Fan Motor (M4) Developing Motor (M3) [10] Pressure/Retraction Solenoid /2nd Image Transfer (SL4) Phaser®...
  • Page 357 Parts Layout Drawing [14] [13] [12] [11] [10] 4139fs5503c0 Retraction Position Sensor /Cleaning Blade Fusing Paper Loop Sensor (PC8) (PC6) Safety Switch (S2) Registration Sensor (PC1) Rack Positioning Sensor (PC3) [10] Belt Positioning Sensor (PC4) Temperature/ humidity Sensor (HS1) [11] Fusing Safety switch (S3) Tray1 Paper Empty Sensor (PC9) [12] Exit Sensor (PC7) OHP Sensor (PC2A)

  • Page 358: Lower Feeder Unit (Option

    Parts Layout Drawing Lower Feeder Unit (option) 4056fs5501c0 Lower Feeder Board (PWB-F PF) Lower Feeder Paper Pick-up Solenoid (SL7 PF) Tray Set Detecting Switch (S4 PF) Phaser® 6120 Color Laser Printer Service Manual...

  • Page 359: Duplex Unit (Option

    Parts Layout Drawing Duplex Unit (Option) 4057fs5501c0 Duplex Reverse Motor (M9 DU) Duplex Paper Loop Sensor (PC10 DU) Duplex Door Sensor (PC11 DU) Duplex Board (PWB-A DU) Duplex Transport Motor (M8 DU) Duplex Transport Sensor (PC12 DU) Duplex Registration Solenoid (SL6 DU) Duplex Cooling Fan Motor (M10 DU) Phaser®...

  • Page 360: Connector Layout Drawing

    Connector Layout Drawing Connector Layout Drawing Description Number of Pins Possible to confirm by removing external cover. Not possible to confirm by removing external cover. 4139fs5504c0 No. CN No. Location No. CN No. Location 2-E∼ F Phaser® 6120 Color Laser Printer Service Manual...

  • Page 361: Timing Chart

    Timing Chart Timing Chart Fusing Motor (M7) Main Motor (M1) Rack Motor (M2) Developing Motor (M3) Developing Bias/Y Developing Bias/M Developing Bias/C Developing Bias/K 2nd Image Transfer Bias 2nd Image Transfer Pressure/Retraction Transfer Belt Cleaner Retraction 1st Image Transfer Bias Registration Roller Sensor (PC1) Registration...

  • Page 362: Acronym And Terminology Definitions Table

    Acronym and Terminology Definitions Table Acronym and Terminology Definitions Table Term Definition (W)x(D)x(H) Width x Depth x Height 1st Transfer 1st Image Transfer 2nd Transfer 2nd Image Transfer Alternating Current AIDC Density Sensor Assy Assembly ATVC Auto Transfer Voltage Control Celsius Scan Direction CMYK...
  • Page 363 Acronym and Terminology Definitions Table Term Definition Pound Liquid Crystal Display Laser Diode LOCK Motor Off (Bad Motor Failure) LVPS Low Voltage Power Supply Motor Megabyte Machine Control Unit Megahertz Millimeters Multiple Page Job Network Interface Card NVRAM Non-Volatile Random Access Memory Organic Photo Conductor Parameter Chip NVRAM...
  • Page 364 Acronym and Terminology Definitions Table Term Definition Relative Humidity Read Only Memory S4 PF Tray Detection Switch SD or CD Scan Direction Solenoid Toner Cartridge Uniform Resource Locator Universal Serial Bus Volts Bias Voltage Watts Phaser® 6120 Color Laser Printer Service Manual A-10...

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