Lexmark C925/X925. Color Product Study Guide

Transcription

1 Lexmark C925/X925 Color Product Study Guide

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3 Edition: June 2011 Revision: 2.3 The following paragraph does not apply to any country where such provisions are inconsistent with local law: LEXMARK INTERNATIONAL, INC. PROVIDES THIS PUBLICATION AS IS WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Some states do not allow disclaimer of express or implied warranties in certain transactions; therefore, this statement may not apply to you. This publication could include technical inaccuracies or typographical errors. Changes are periodically made to the information herein; these changes will be incorporated in later editions. Improvements or changes in the products or the programs described may be made at any time. Comments may be addressed to Lexmark International, Inc., Department 352X/008-4, 740 West New Circle Road, Lexington, Kentucky 40550, U.S.A or at ServiceInfoAndTraining@Lexmark.com. Lexmark may use or distribute any of the information you supply in any way it believes appropriate without incurring any obligation to you. References in this publication to products, programs, or services do not imply that the manufacturer intends to make these available in all countries in which it operates. Any reference to a product, program, or service is not intended to state or imply that only that product, program, or service may be used. Any functionally equivalent product, program, or service that does not infringe any existing intellectual property right may be used instead. Evaluation and verification of operation in conjunction with other products, programs, or services, except those expressly designated by the manufacturer, are the user s responsibility. Lexmark and Lexmark with diamond design are trademarks of Lexmark International, Inc., registered in the United States and/or other countries. PCL is a registered trademark of the Hewlett-Packard Company. All other trademarks are the property of their respective owners Lexmark International, Inc. All rights reserved. UNITED STATES GOVERNMENT RIGHTS This software and any accompanying documentation provided under this agreement are commercial computer software and documentation developed exclusively at private expense. For Training Purposes Only

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5 Table of Contents TLI, TYPE AND SERIAL NUMBER LOCATION... 1 C925 TECHNICAL INFORMATION... 2 SPECIFICATIONS...2 DUTY CYCLE...3 PRINT SPEED...3 MEDIA OPTIONS...4 SUPPLY ITEMS...4 C925 Toner Cartridges...4 C925 Imaging Units...5 C925 Waste Toner Bottle...5 C925 Maintenance Items...5 X925 TECHNICAL INFORMATION... 6 SPECIFICATIONS...6 DUTY CYCLE...7 FAX FEATURES...7 SCANNER SPECIFICATIONS...9 MFP SCAN SPEED...9 MEDIA OPTIONS...10 SUPPLY ITEMS...10 X925 Toner Cartridges...10 X925 Imaging Units...11 X925 Waste Toner Bottle...11 X925 Maintenance Items...11 THEORY OF OPERATION ELECTROPHOTOGRAPHIC PROCESS...12 PAPER TRANSPORT SYSTEM...14 Paper Feed Mechanism...14 C925 and X925 Print Engine Paper Path...23 C925 Paper Jam Locations...24 X925 Paper Jam Locations...25 C925 AND X925 KEY COMPONENTS CROSS-SECTIONAL...26 For Training Purposes Only

6 X925 ADF SCANNER THEORY OF OPERATION...28 ADF Key Components...30 ADF Paper Path...32 OPERATOR PANEL AND MENUS C925 OPERATOR PANEL...34 C925 Home Screen...35 C925 Home Screen Buttons...36 C925 Administrative (Customer) Menu...37 C925 Service Menus...38 X925 OPERATOR PANEL...40 X925 Home Screen...41 X925 Home Screen Buttons...42 X925 Administrative (Customer) Menu...43 X925 Service Menus...44 PRINT QUALITY DIAGNOSTIC TIPS GENERAL TERMINOLOGY...46 PRINT QUALITY RULES OF THUMB...47 PAPER TRANSPORT DIAGNOSTIC TIPS PAPER RULES OF THUMB...48 FAX PRINT QUALITY DIAGNOSTIC TIPS Sending Fax Machine at Fault...50 Receiving Fax Machine at Fault...51 Phone Line at Fault...51 COMPLEX PARTS AND PROCEDURES TONER SENSORS...53 PAPER FEED UNIT...53 DUPLEX UNIT...53 SUB-DRIVE ASSEMBLY...53 RIP BOARD...53 ADF ASSEMBLY...57 FLATBED ASSEMBLY...57 For Training Purposes Only

7 CCD ASSEMBLY...57 MIRRORED PRINTHEAD SETTINGS COMPONENTS...58 Engine Board...58 Printhead Controller Board...58 MIRRORED NVRAM COMPONENTS...58 Operator panel UICC Card...58 RIP Board...58 OTHER SPECIAL INSTRUCTIONS CLEANING THE MFP DOCUMENT GLASS X925 ONLY...59 SECURITY RESET JUMPER...60 For Training Purposes Only

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9 TLI, Type and Serial Number Location To find the TLI, printer Type and Serial number, open the front cover and look inside the machine on the left hand side. For Training Purposes Only 1

10 C925 Technical Information Specifications C925 Processor Speed and Type 800 MHZ, IBM Memory Standard 256 MB (Max 1280 MB) Optional Memory 256MB, 512MB and 1024 MB DDR2 SODIMM Optional Flash Memory 256 MB Hard Drive Optional 160GB or Higher Connections Standard Gigabit Ethernet & USB Option Slots DRAM DIMM Slots 1 Wireless Option Yes ISP (INA) Slots 1 1 DLE Firmware Card, Font Card and Flash Memory Card Slots 2 2 Paper Handling Paper Input Standard Sheet Tray + 50 MPF (total 450) Optional Paper Handling: Input 550 Sheet Tray (Up to 3) Optional Paper Handling: Output None Duplex Yes Finishing None Hard Drive Optional Service Warranty One year On-site Parts and Labor Furniture Furniture Standard None Optional Furniture Caster Base 1 ISP Slot for C925 is optional and contained in an external housing. 2 Supported combination if both slots used: DLE + user flash, DLE + Font, Font + User Flash. The C925 is a single function wide format color LED printer. For Training Purposes Only 2

11 Duty Cycle Usage (Pages) Model Average Monthly 1 Duty Cycle 2 C925 2,500-10, ,000 1 Average Monthly Page Volume is an average range of pages customers plan to print on the device each month. Lexmark recommends that the number of pages per month be within the stated range for optimum device performance, based on factors including: supplies replacement intervals, paper loading intervals, speed, and typical customer usage. ² Duty Cycle is defined as the maximum monthly usage verified using multi-shift operation. The usage rate can be limited by application and run mode. Print Speed Media Size C925 Mono Color Letter (plain) 30ppm 30ppm A4 (plain) 31ppm 31ppm Note: Throughput is measured using default printer settings. For Training Purposes Only 3

12 Media Options Lexmark C925 Options 550-Sheet Drawer Cabinet/Castor Base This item serves as both the castor base and cabinet. One part number orders both pieces. Important: No previous stands or carts are approved for use with the C925/X925 family; they should not be proposed or recommended. The authoritative tables of maximum Printer Paper Options/Furniture combinations are publicly available at Please refer to this information when purchasing additional paper input options for any of the C925 Series printers. Supply Items C925 Toner Cartridges Toner Cartridges Approximate Yield Ships with printer Aftermarket Version Available Starter Cartridge C, M, Y, K 3,500 pages¹ Yes No High Yield Toner Cartridge K 8,500 pages¹ No Yes High Yield Toner Cartridges C, Y, M 7,500 pages¹ No Yes ¹ Average continuous black or continuous composite CMY declared cartridge yield up to this number of standard pages in accordance with ISO/IEC For Training Purposes Only 4

13 C925 Imaging Units Approximate Yield Ships with printer Aftermarket Version Available Imaging Units C,Y,M,K 30,000¹ pages Yes Yes ¹ Imaging Unit maximum yield estimate based on 3 average letter/a4-size pages per print job. Actual yield may vary based on other factors such as device speed, paper size and feed orientation, toner coverage, tray source, percentage of black-only printing and average print job complexity. Imaging Unit contains a photoconductor drum, developer and a small amount of toner. C925 Waste Toner Bottle Approximate Yield Ships with printer Aftermarket Version Available Waste Toner Bottle Up to 80,000 Pages Yes Yes C925 Maintenance Items Approximate Yield 1 Customer Installable Fuser Up to 120,000 Pages Yes Transfer Belt w/ 2 nd Roll Up to 100,000 Pages Yes Paper Feed Kit (Pick Roll, Feed Roll, Separator Roll, Paper Exit rolls, Registration Rolls) 300,000 Pages No MPF Feed Kit 100,000 Pages No 1 Yield depends on many factors including the environment printing habits, etc. For Training Purposes Only 5

14 X925 Technical Information Specifications X925 Processor Speed and Type 1GHZ, IBM Memory Standard 512 MB (Max 1.5 GB) Optional Memory 256MB, 512MB and 1024 MB DDR2 SODIMM Optional Flash Memory 256 MB Hard Drive 160GB or Higher Connections Standard Gigabit Ethernet & USB Option Slots DRAM DIMM Slots 1 Wireless Option Yes ISP (INA) Slots 1 DLE Firmware Card, Font Card and Flash Memory Card Slots 2 1 Paper Handling Paper Input Standard Sheet Tray + 50 MPF (total 450) Optional Paper Handling: Input 550 Sheet Tray (Up to 3) Optional Paper Handling: Output None Duplex Yes Finishing None Hard Drive Standard Service Warranty One year On-site Parts and Labor Furniture Furniture Standard None Optional Furniture Caster Base 1 Supported combination if both slots used: DLE + user flash, DLE + Font, Font + User Flash. The X925 is a multifunction wide format color LED printer and scanner with print, scan, copy and fax capability. For Training Purposes Only 6

15 Duty Cycle Usage (Pages) Model Average Monthly 1 Duty Cycle 2 X925 5,000 10, ,000 1 Average Monthly Page Volume is an average range of pages customers plan to print on the device each month. Lexmark recommends that the number of pages per month be within the stated range for optimum device performance, based on factors including: supplies replacement intervals, paper loading intervals, speed, and typical customer usage. ² Duty Cycle is defined as the maximum monthly usage verified using multi-shift operation. The usage rate can be limited by application and run mode. Fax Features Feature Fax Preservation Color Fax Fax Content Original Size Dial Mode Custom Job scanning Scan Preview Fax Cover Page Fax Number Masking Maximum Speed Delayed Send Block Junk Fax Banned Fax List Fax Shortcuts Broadcast Fax Maximum locations is 400 Fax Forwarding Notes Faxes are preserved over power cycle Enable Color Scans Auto Convert Color to Mono Fax Enable Color Fax Receive When On the sending device transmits in color and receiving device prints in grayscale When Off the sending device converts and transmits the job as a mono job Type: Text, Graphics, Text/Photo, Photo Source: Color Laser, Black/White Laser, Inkjet, Photo/Film, Magazine, Newspaper, Press, Other All sizes supported by device including: Mixed Letter/Legal Touch Tone Pulse Only appears if hard drive installed Only appears if hard drive installed Includes: To, From, Message, Footers, Logo and Total Pages Active masking Settings for both Send and Receive Supported Based on Caller ID or Remote Station ID Average shortcut includes: 25 characters for Name, 10 characters for number and 4 characters for Shortcut Id. Shortcuts can contain one phone number or multiple numbers. Each number is a location; see Performance area for maximum locations. Incoming Faxes may be forwarded to: Fax using one Fax Shortcut using one Shortcut FTP using one FTP shortcut For Training Purposes Only 7

16 Caller ID Manual Fax Fax from PC Fax Print Holding Fax Logs Distinctive Ring selection Sound Control Fax Server LDSS esf supported via custom application Any fax resolution that can be received can also be forwarded If subscribed to Caller ID from phone provider Disabled by default Supported using Postscript driver Only appears if hard drive installed Transmission Log Receive Error Log Fax Call Log Fax Job Log If subscribed/configured from phone provider Ringer Volume Speaker Volume Speaker Mode On, On Until Connected, Off Fax Server mode will send the scanned fax job to the fax server via , where it will be sent to the receiver. The device should be tested for configurability and compatibility with the desired third fax server products such as: Biscom, Equisys-ZetaFax, OMTool, Captaris RightFax, or Tobit- Faxware. For Training Purposes Only 8

17 Scanner Specifications Scanner Scanner Type Scan Technology Light Source Number of Light Sources Scanner ADF ADF Type Scanner ADF Document Input & Output Capacity Scanner Media Depth (Thickness) Scanner Media Weight Document Size Document Size Sensing Document Sensing Scanner Flatbed Max Document Size Document Size Sensing Print Engine Print Technology Duplex output Paper Feed Orientation Fax Modem Color Flatbed Scanner with ADF Charge Coupled Device (CCD) White LED Instant On 1 LED array per CCD Module Re-circulating (Dual Pass) Automatic Document Feeder (RADF) 100 Sheets, 20 lb. (75 g/m2) Bond Max..11mm Min..08mm Max. 32lb (120g/m2) Min. 16lb (60g/m2) Max x 25.0 (299.72mm x 635mm) Short Edge Feed (SEF) Min. 4.0 x 5.04 (101.6mm x mm) Short Edge Feed (SEF) Yes length and width in ADF Yes ADF paper present LED and on/off settable beep Max 11 x 17 (279.4mm x 431.8mm) Yes paper length sensing only on flatbed Color LED Standard Short Edge and Long Edge Fed Built-in Group 3 compatible, Full Function Fax 33,600bps, Max V.34 Half Duplex MFP Scan Speed Media Size Simplex Duplex Mono Color Mono Color Letter (plain) A4 (plain) Note: Scan Performance is measured as 150dpi 1-bit for mono and 150dpi 24-bit for color. For Training Purposes Only 9

18 Media Options Lexmark C925 Options 550-Sheet Drawer Cabinet/Castor Base This item serves as both the castor base and cabinet. One part number orders both pieces. Important: No previous stands or carts are approved for use with the C925/X925 family; they should not be proposed or recommended. The authoritative tables of maximum Printer Paper Options/Furniture combinations are publicly available at Please refer to this information when purchasing additional paper input options for any of the X25 Series printers. Supply Items X925 Toner Cartridges Toner Cartridges Approximate Yield Ships with printer Aftermarket Version Available High Yield Toner Cartridge K 8,500 pages¹ Yes Yes High Yield Toner Cartridges C, Y, M 7,500 pages¹ Yes Yes ¹ Average continuous black or continuous composite CMY declared cartridge yield up to this number of standard pages in accordance with ISO/IEC For Training Purposes Only 10

19 X925 Imaging Units Approximate Yield Ships with printer Aftermarket Version Available Imaging Units C,Y,M,K 30,000¹ pages Yes Yes ¹ Imaging Unit maximum yield estimate based on 3 average letter/a4-size pages per print job. Actual yield may vary based on other factors such as device speed, paper size and feed orientation, toner coverage, tray source, percentage of black-only printing and average print job complexity. Imaging Unit contains a photoconductor drum, developer and a small amount of toner. X925 Waste Toner Bottle Approximate Yield Ships with printer Aftermarket Version Available Waste Toner Bottle Up to 80,000 Pages Yes Yes X925 Maintenance Items Approximate Yield 1 Customer Installable Fuser Up to 120,000 Pages Yes Transfer Belt w/ 2 nd Roll Up to 100,000 Pages Yes Paper Feed Kit (Pick Roll, Feed Roll, Separator Roll, Paper Exit rolls, Registration Rolls) 300,000 Pages No MPF Feed Kit 100,000 Pages No ADF Pick Arm 200,000 Pages Yes ADF Separator Roll 100,000 Pages Yes Flatbed Cushion As needed Yes 1 Yield depends on many factors including the environment printing habits, etc. For Training Purposes Only 11

20 Theory of Operation Electrophotographic Process This color laser printer uses the Electrophotographic process (EP Process) to image toner onto the media via a tandem (in-line) system. This system contains four color cartridge assemblies (cyan, yellow, magenta, and black). The Electrophotographic Process steps are as follows: Charge each Photoconductor Drum surface is evenly charged with electricity from the Charge Roll (located inside the photoconductor unit assembly) by the HVPS board, Expose each Printhead (LED) exposes the photoconductor with light and creates a Latent Image on the surface by partially discharging the area exposed. In this printer, each color has its own LED printhead to expose the four color stations, Develop toner from the Developer Roll (located in the developer unit assembly) adheres to the latent image on the surface of the photoconductor. This happens because of a difference in charge potential between the two surfaces, 1 st Transfer an electrical charge is sent to each of the four 1 st Transfer Rolls inside the Transfer Belt. Due to the difference in charge potential, toner is transferred from the Photoconductor Drum to the surface of the Transfer Belt as it passes each color station, 2 nd Transfer media is picked from the tray and passes between the 2 nd Transfer Roller and Transfer Belt surface. A positive charge is sent to the 2 nd Transfer roller and toner jumps to the media due to the charge difference, Fuse the media is carried to the fuser where the toner is bonded permanently to the page by heat and pressure, Clean/Erase a cleaning blade for each Photoconductor Drum and one for the Transfer Belt clean residual toner from the surfaces of those components. Waste toner is deposited into the Waste Toner Box. This printer does not have erase lamps. If a component fails, it is important to recognize at which step the failure took place. By knowing this, you can determine the source of the problem. Understanding the EP Process is the key to troubleshooting print quality problems. The following page illustrates the EP Components in a cross-sectional of a C925/X925 printer. A more detailed cross-sectional is found later in this section. For Training Purposes Only 12

21 EP Process Components Cross-sectional LED Printhead Cleaning Blade (Transfer Belt) Fuser Charge Roll Cleaning Blade (Photoconductor) 1 st Transfer Roller Photoconductor Drum Developer Roller Waste Toner Box Transfer Belt 2 nd Transfer Roller For Training Purposes Only 13

22 Paper Transport System Paper Feed Mechanism The standard paper feed sources consist of Tray 1, Tray 2, and a Multipurpose (MPF) Tray. The paper feed system on the paper cassettes uses a separation roll/torque limiter to prevent multiple feeds. The MFP, on the other hand, uses a separation pad. Integrated Tray 1 Tray 1 uses a spring loaded plate to engage the media in the tray with the pick roll. Tray 1 holds approximately 150 sheets of 20lb paper and Tray 2 holds about 250 sheets of 20lb paper. Tray 1 Pick Roll Pick up Fixture Guide Pick roll push-up mechanism Paper Bottom Plate Push up Spring Release Bar Tray 1 does not have automatic size sensing, therefore, the correct paper size must be set on the paper size wheel located on the front right of the tray (see pictures below). For Training Purposes Only 14

23 Integrated Tray 2 Tray 2 uses a motorized lift plate to engage the media in the tray with the pick roll. Tray 2 holds approximately 250 sheets of 20lb paper. Light Shield Plate Upper Limit Sensor Pick Roll push-up mechanism Tray 2 Paper Pick Roll Bottom Plate Paper Cassette Installation Push-up plate connected to the paper tray lift motor Tray 2 does have automatic size sensing. The size is determined by the placement of the green tray guide within the paper tray. For Training Purposes Only 15

24 Optional Paper Trays (3-5) Trays 3 through Tray 5 use a motorized lift mechanism to engage the media in the tray with the pick roll and can hold up to 500 sheets of 20lb paper. Light Shield Plate Upper Limit Sensor Pick Roll push-up mechanism Optional Paper Cassette Paper Pick Roll Bottom Plate Paper Cassette Installation Push-up plate connected to the paper tray lift motor Trays 3-5 do have automatic size sensing and automatically tell the printer the paper size based on the position of the tray guides in the drawer. The sensor that detects the paper size is sensitive, so positioning the Tray Guide 1 or 2 notches out of position could result in an incorrect paper size reading. If any Paper Jams, 34 Short paper messages or other paper feed problems occur, check the paper size in the tray against the size the printer thinks is loaded (you can view the paper size in the Paper Menu). Multipurpose Feeder The MFP holds about 50 sheets of 20lb paper and does not have automatic size sensing; the size must be set within the Paper Menu. A paper present sensor (not shown below) detects paper once it is loaded in the Tray. The sensor is located next to the Paper Feed Roller. Paper Paper Feed roller (MPF feed clutch) MFP Tray Duplex Exit/MFP Sensor Actuator Duplex Exit Roller For Training Purposes Only 16

25 Tray Paper Feed The printer controller sends a signal to turn on the paper feed clutch; the pick roll grabs the top sheet of paper while the separation roll rotates backwards to prevent multiple sheets of paper from feeding. The paper moves to the feed roller and is fed into the paper path. Registration roll OUT Std Registration Transport Clutch roller IN Paper Feed Motor Paper Feed Clutch Pick Roll Feed Roll Paper Separation Roll/Torque Limiter Pick Roll Feed Roll Normal Feed Friction: A>B Separator Roll Torque Limiter Multi-Feed Friction: a>b>c For Training Purposes Only 17

26 MPF Paper Feed To start the paper feed, the printer controller sends a signal to turn on the MPF feed clutch; the paper feed motor starts turning the Paper Feed Roller to feed the top sheet of paper in the MPF tray one by one. Once the duplex exit/mpf detection lever senses the leading edge of the media at the duplex exit roll, it engages the duplex re-feed clutch to transport the sheet of paper into the paper path. Duplex transport upper roller (Duplex clutch) Paper Timing Belt Paper feed roller (MPF feed clutch) Lower Duplex transport roll Std registration roller (Delivery Roller) MPF Tray Duplex exit roller Duplex exit/mpf sensor actuator For Training Purposes Only 18

27 Registration Unit As the media trips the Registration Sensor, it briefly stops at the two Registration Rolls. Here, the leading edge is adjusted so it is parallel with the image on the Transfer Belt and synchronized with the Belt s rotation. Next, the paper feed motor triggers the Registration Clutch to rotate the Registration Roll OUT to feed the paper toward the Transfer Belt and 2 nd Transfer Roller. MPF Registration Roll IN Transfer Belt Registration roll OUT Registration Sensor Actuator Paper Transfer Belt The media passes between the Transfer Belt surface and 2 nd Transfer Roller. Here, the image transfers to the page and continues upward toward the Fuser Rollers. The transfer belt rotates during calibration to automatically adjust the density and printer alignment. The density sensor is positioned facing the left side of the belt where the belt drive roller is located. This sensor reads small patches of toner that are laid down on the belt during calibration. The printer automatically adjusts the printer alignment and skew during calibration. adjustment of the alignment is needed. No manual Take care not to get fingerprints or other stains on the belt as this can cause print quality problems. If you do, wipe them away with a soft dry cloth. For Training Purposes Only 19

28 Fuser The media passes the Fuser Entry Detection Sensor and enters the Fuser. Here, heat and pressure are applied to the page to bond the image permanently to the media. The toner is impregnated with wax, so it releases from the fuser rolls without the need of a wiper or oil coating roller. The Fuser Rollers continue to feed the paper upward to the Fuser Exit Sensor and Fuser Exit Rolls. Fuser Belt Halogen Heater Heated Roller Thermistor 1 (at non driving side) Thermistor 2 (at non driving side) Separator Halogen Heater Press Roller Thermistor 3 Thermostat Fuser entry gear Paper Exit Thermostat Fuser Roller Fuser Entry detecting lever Fuser Motor If the sheet is single-sided, the paper passes the Fuser exit Sensor and is fed into the standard bin by the Exit Rolls. Paper Exit Roll Paper Paper Exit Sensor Fuser Exit Roll Paper For Training Purposes Only 20

29 Duplexing If a page is two-sided, a signal is sent to the Printer Controller Board once the trailing edge of the paper passes the Paper Exit Sensor. The leading edge of the paper partially feeds from the Exit Rolls and then reverses direction and feeds into the Duplex Unit. This method of re-feed is called a Peek-a-boo. The Duplex Entry Rollers pass the paper down to the Duplex Transport Rollers along the right side of the printer. Once the paper reaches the bottom, the Duplex Exit/MPF detection lever senses the leading edge of the media at the Duplex Exit Roll and it engages the Duplex re-feed clutch to transport the sheet of paper into the EP paper path. Note: Once the media reaches the Duplex Exit/MPF detection lever, it shares the same paper path as the MPF. The following page illustrates the Duplex paper transport in a cross-sectional of a C925/X925 printer. For Training Purposes Only 21

30 Duplex Paper Transport Paper Paper Exit Roll Duplex entry Roller Paper Exit Sensor Timing Belt Fuser Exit Roll Duplex Clutch Timing Belt Transfer Roll MPF Registration Roller Paper Lower Duplex Transport Roll Std Registration Roller (Delivery Roller) Registration Sensor Timing Belt Paper Duplex/MPF Sensor Actuator Duplex Exit Roll For Training Purposes Only 22

31 C925 and X925 Print Engine Paper Path Simplex Paper Path Duplex Paper Path For Training Purposes Only 23

32 C925 Paper Jam Locations Area Jam Message Explanation xx Paper jam in the transfer / carry area xx Paper jam in the fuser entry area Paper jam at the paper exit area Paper jam in the duplex Paper jam in the duplex. Check the duplex sensor area at the bottom of the duplex. 5 24x Paper jam in the paper tray. <x>indicates which tray the jam is in Paper jam in the MPF tray For Training Purposes Only 24

33 X925 Paper Jam Locations Area Jam Message Explanation Scan Sensor Jams Scanner ADF Cover Open Jam Scanner Static Jam - Scan Sensor Jams Paper Missing Scanner ADF Eject Jam xx Paper jam in the transfer / carry area Paper jam in the MPF tray 201.xx Paper jam in the fuser entry area Paper jam in the duplex Paper jam in the duplex. Check the duplex sensor area at the bottom of the duplex. 5 24x Paper jam in the paper tray. <x>indicates which tray the jam is in Paper jam at the paper exit area Scanner Carriage Locked Flatbed cover open For Training Purposes Only 25

34 C925 and X925 Key Components Cross-sectional Table of components located on the next page For Training Purposes Only 26

35 Table of Components 1 Charge Roll 16 Press Roll 31 Duplex Bottom Transport Roll 2 LED Head 17 Transfer Belt 32 Duplex Exit Roll 3 Developer Roll 18 Transfer Belt Drive Roll 33 Paper Exit Roll 4 Primary Transfer Roller 19 Pickup Roll (MP Feeder) 34 Registration Sensor Actuator 5 Drum Cleaning Blade 20 Feed Roll (MP Feeder) 35 Fuser Input Sensor Actuator 6 Photoconductor 21 Separation Roll (MP Feeder) 36 Duplex Exit Sensor Actuator 7 Doctor Blade 22 Pickup Roll (Std Tray) 37 Paper Exit Sensor Actuator 8 Supply Roll 23 Feed Roll (Std Tray) 38 Transport Roll 9 Toner Cartridge 24 Separation Roll (Std Tray) 39 MPF Feed Roll 10 Secondary Transfer Roll 25 Registration Roller (IN) MP Feeder 40 Bin Full Detection Lever 11 Transfer Belt Cleaning Blade Fuser Heater Hot Roll 28 Registration Roller (OUT) MP Feeder Standard Registration Roller (IN) Std Tray Standard Registration Roller (OUT) Std Tray 14 Fuser Belt 29 Duplex Input Roll 15 Fuser Roll 30 Duplex Transport Roll For Training Purposes Only 27

36 X925 ADF Scanner Theory of Operation The X925 duplex ADF enables the user to create duplex scans automatically, eliminating the need to flip the media over in order to duplicate it. The ADF uses a step motor and a series of sensors to determine the media s position in the paper path during the scan process. The following steps are performed in creating a scan on the X925 ADF: The paper is placed on the flatbed or the ADF paper tray and a scan or copy command is initiated by the user from a computer or on the scanner itself. Once the scan command is initiated, the ICC board on the scanner polls the paper present sensor in the ADF to see if paper is present. If paper is present, the size sensors are polled to determine the length and width of the paper. There are two paper length sensors found on the ADF input tray. - These sensors detect A4 vs. folio for non-us users, and letter vs. legal for US users. - The ADF paper width sensor consists of three photo interrupt sensors that are actuated by the paper guides on the ADF tray. The position of the guides detect A4, B5, and A5 widths for non US users and statement, executive, and letter widths for US users. After the size of the paper determined by the width and length sensors, the cover open sensor is polled to ensure the ADF top cover is properly closed. - If the cover is not closed, an error posts on the machine. - If the cover is closed, the pickup sensor is polled. The pickup sensor determines if the pick roll is in the up or down position. - If the pick roll is in the up position, it is moved to the down position. - If the pick roll is already in the down position, the ADF relay card signals the start of the pick process. The top sheet of paper is pulled into the ADF towards the feed roll. To prevent double feeds, a separator roll provides resistance to hold other sheets in the paper input tray. Once the top sheet passes the feed roll, it moves into the ADF paper path and triggers the gap sensor actuator. At this point, the paper has a certain amount of time to pass over it (based on the paper length) otherwise a jam error posts. After passing the gap sensor, the paper reaches the paper in sensor. This is a reflective sensor that determines the position of the paper in the paper path and activates the actual scan image process. As the paper advances to the scan area, it actuates the ADF Scan Sensor. - The ADF motor generates pulses which are stored in an on-board counter. - This counter, along with the ADF scan sensor, ensure that the media travels at the correct speed through the scan area (determined by the image DPI specified by the user). - After a predetermined number of counts, the media reaches the scan area and the image acquisition process is initiated. While the image acquisition process is executing, the ADF scan sensor is polled to determine if the trailing edge of the media has reached the sensor. For Training Purposes Only 28

37 Once the trailing edge of the scan media reaches the ADF scan sensor, the sensor moves to the off position and the image acquisition process continues for a pre-calculated length of time. After the scan is complete, the trailing edge of the media continues to the reverse point where the duplex gate is positioned by a solenoid to direct the paper to the pass through sensor. As the paper reaches the paper pass sensor, the sensor does two things: - It determines if a jam has occurred (based on the time it takes for the paper to pass through the sensor). - It determines the position of the paper in the ADF paper path based on the size of the paper in the scan job. o o o Once the sensor determines that the paper has left the ADF paper path, a signal is sent to move the duplex gate so the paper may enter the duplex paper path. A second signal is sent to trigger the gear solenoid to move the reversing gear assembly into place. This reverses the direction of the duplex paper rolls and creates a peek-a-boo effect by pulling the exiting paper back into the duplex paper path. If the scan job is simplex, the duplex gate is positioned to direct the media to the exit roller and the media exits the ADF to the output bin. The transport roll moves the media through the duplex paper path to the paper in sensor. When the paper in sensor is actuated, the exit roll stops reversing and signals that that this is the second side of the media to be scanned. The imaging process is repeated for the other side of the paper. After the image is created, the paper proceeds to the paper pass sensor a second time. When the trailing edge of the media reaches the reverse point for the second time, the solenoid moves the duplex gate to the down position and reverses the exit roll. The paper reverses back into the ADF unit for a third time. The paper passes through the paper path, but no imaging occurs. This pass turns the paper over to the original side up. Once the trailing edge of the media reaches the reverse point the third time, the solenoid is not actuated. The paper proceeds to the exit rolls and passes out of the ADF to the exit bin. For Training Purposes Only 29

38 ADF Key Components Table of component numbers located on the next page For Training Purposes Only 30

39 Number Part name Affected CRU / FRU part catalog name 1 ADF paper length and width sensors - photo reflect / multi-point contact Tray paper size sensor 2 Paper pass sensor -photo reflect Duplex timing sensor 3 ADF paper present - photo interrupt ADF paper path sensor 4 ADF cover open ADF paper path sensor 5 Pick roll ADF pick roll (CRU) 6 Pick roll position sensor -Photo interrupt ADF paper path sensor 7 Feed roll ADF pick roll (CRU) 8 Separator roll ADF Separator roll (CRU) 9 Paper gap sensor - photo interrupt ADF paper path sensor 10 Paper in sensor -Photo reflect Scan sensor 11 Scan roll ADF main feed unit 12 Scan sensor -Photo interrupt Scan sensor 13 Takeaway roll ADF main feed unit 14 ADF paper exit sensor - Photo interrupt Duplex out sensor 15 Stack roller ADF main feed unit 16 Pass roller ADF main feed unit For Training Purposes Only 31

40 ADF Paper Path Duplex Simplex Entrance (text up) Simplex Exit (paper will re enter for duplex scanning) S C A N CCD Flatbed Duplex Entrance Duplex Exit (paper re enters path to be turned face down) S C A N CCD Flatbed Final pass entrance (Turning Paper after Duplex scan) Paper Exit (Text down) Flatbed CCD For Training Purposes Only 32

41 Simplex Simplex Entrance (text up) Simplex Exit (text down) S C A N CCD Flatbed For Training Purposes Only 33

42 Operator Panel and Menus C925 Operator Panel Number Item Description 1 Display Shows the status of the printer 2 Home Lets you navigate back to the home screen 3 Keypad Allows you to enter numbers, letters, or symbols 4 Sleep Enables Sleep Mode Note: Touching the screen or any hard button presses can cause the printer to wake from Sleep Mode. 5 PictBridge and USB port Allows the user to connect a PictBridge-enabled digital camera, a USB Bluetooth adapter, or a flash drive to the printer Note: Only the front USB port supports flash drives. 6 Indicator light 7 Stop/Cancel Off The printer is off. Blinking green The printer is warming up, processing data, or printing. Solid green The printer is on, but idle. Solid red Operator intervention is needed. Amber The printer is in Sleep mode or Hibernate mode Stops all printer activity Note: A list of options is displayed once Stopped appears on the display. For Training Purposes Only 34

43 C925 Home Screen The following page contains a detailed description of the Home Screen buttons and their functions. For Training Purposes Only 35

44 C925 Home Screen Buttons Display item Change Language Bookmarks Held Jobs USB Menus Status message bar Status/Supplies Tips Search Held Jobs Description Allows you to temporarily change the primary language and reports on the display; this will remain in effect unless changed. Allows you to create, organize, and save a set of bookmarks (URL) into a tree view of folders and file links. Displays all the held jobs Displays all Held Jobs Displays the files on a USB drive. Displays the menus. Shows the current printer status such as Ready or Busy. Note: Make sure the Ready appears before performing any task. Shows printer conditions such as Fuser Missing or Cartridge Low Shows intervention messages and gives instructions so the printer can continue processing. Displays a warning or error message whenever the printer requires intervention to continue processing. Touch this button to access the messages screen for more information on the message and how to clear it. Opens a context-sensitive Help feature on the touch screen Searches on any of the following items and returns search results: User names for held or confidential print jobs Job names for held jobs, excluding confidential print jobs Profile names Bookmark container or print job names USB container or print job names for supported file types Depending on your configuration, not all buttons may appear. For a complete listing of Home Screen buttons and their functions, please see the Lexmark C925 or X925 User s Guide. For Training Purposes Only 36

45 C925 Administrative (Customer) Menu For a complete listing of the printer menu tree, consult the User s Guide. C925 Administrative (Customer) Menu Tree Supplies Menu Paper Menu Reports Network/Ports Replace Supply Default Source Menu Settings Page Active NIC Cyan Cartridge Paper Size/Type Device Statistics Standard Network * Magenta Cartridge Configure MP Network Setup Page Standard USB Yellow Cartridge Substitute Size Network [x] Setup Page Parallel [x] Black Cartridge Paper Weight Profiles List Serial [x] Cyan Imaging Unit Paper Loading Print Fonts SMTP Setup Magenta Imaging Unit Custom Types Print Directory Yellow Imaging Unit Custom Names Print Demo Black Imaging Unit Universal Setup Asset Report Waste Toner Bottle Fuser Transfer Module Maintenance Kit Security Settings Help Miscellaneous Security Settings General Settings Print All Guides Confidential Print Flash Drive Menu Color Quality Disk Wiping Print Settings Print Quality Security Audit Log Printing Guide Set Date and Time Media Guide Print Defects Guide Menu Map Information Guide Connection Guide Moving Guide Supplies Guide * Depending on the printer setup, this menu item appears as Standard Network, Wireless Network, or Network [x]. For Training Purposes Only 37

46 C925 Service Menus Several hidden menus exist to configure advanced settings, troubleshoot problems or obtain additional printer information. The settings contained in these menus should not be changed unless it is specifically requested by the Service Manual or technical support. Changing the settings may cause improper operation of the printer. For a complete list of these menus, consult the Service Manual for the printer. To enter the Diagnostic Menu, do the following: Diagnostics Mode Configuration Menu Network SE Menu SE Menu Invalid Engine Code Recovery Mode 1. Turn off the printer. 2. Press and hold 3 and Turn on the printer. 4. Release the buttons when the splash screen appears. To enter Configuration Menu, do the following: 1. Turn off the printer. 2. Press and hold Right 2 and Turn on the printer. 4. Release the buttons when the splash screen appears. To enter the Network SE Menu, do the following: 1. Enter Network/Ports>Standard Network>Std Network Setup menu. 2. Press and hold 9, 7 and Release the buttons when the Network SE Menu appears. From a browser, add /se to the device IP address. (for example: To enter the Invalid Engine Code state, do the following: 1. Turn off the printer. 2. Press and hold Right 3, 4 and Turn on the printer. 4. Release the buttons when the splash screen appears. To enter Recovery Mode, do the following: 1. Turn off the printer. 2. Press and hold 2, 7 and Turn on the printer. 4. Release the buttons when the splash screen appears. The Diagnostics Menu contains advanced settings and operations used for repair, adjustments or other diagnostic actions. The Configuration Menu contains a set of menus, settings and operations which are infrequently required by a user. Generally, the options made available in this menu group are used to configure a printer for operation. You do not POR the machine to access this menu. Configure or reset advanced Network settings. This state allows you to POR the printer into a mode that disables the Engine Code and allows the programming of new code into the Engine card. Typically this function is used to reprogram defective Engine code but can be useful in other applications. This mode will allow the printer to boot from a secondary set of instructions to allow a code flash to the printer. No other functions are available. The screen will have a red background and say "Recovery". While in this mode, you can ONLY flash code via USB directly connected to a PC. For Training Purposes Only 38

47 1. In the Administration (Customer) Menu, select the Network/Ports Menu. 2. Select Standard Network. Network SE Menu 3. Select STD NET SETUP. The Network SE menu contains advanced network menu tools. Warning: Changing the settings within this menu may cause the printer not to function properly. 4. Once in the Standard Network Setup page, press 9, 7 and 6 at the same time. 5. Once you press the buttons, you should be in the Network SE Menu. For Training Purposes Only 39

48 X925 Operator Panel Number Item Description 1 Display Shows the status of the printer 2 Indicator light 3 Sleep Off The printer is off. Blinking green The printer is warming up, processing data, or printing. Solid green The printer is on, but idle. Solid red Operator intervention is needed. Enables Sleep Mode Note: Touching the screen or any hard button presses can cause the printer to wake from Sleep Mode. 4 Keypad Allows you to enter numbers, letters, or symbols 5 Start 6 Stop/Cancel 7 PictBridge and USB port Press to initiate the current job indicated on the display From the home screen, press to start a copy job with the default settings. If pressed while a job is scanning, the button has no effect. Stops all printer activity Note: A list of options is displayed once Stopped appears on the display. Allows the user to connect a PictBridge-enabled digital camera, a USB Bluetooth adapter, or a flash drive to the printer Note: Only the front USB port supports flash drives. 8 Home Lets you navigate back to the home screen For Training Purposes Only 40

49 X925 Home Screen The following page contains a detailed description of the Home Screen buttons and their functions. For Training Purposes Only 41

50 X925 Home Screen Buttons Display item Copy Fax Scan Menus FTP Status message bar Status/Supplies USB Bookmarks Held Jobs Release Held Fax Lock Device Unlock Device Search Held Jobs Cancel Jobs Change Language Tips Description Opens the Copy menus Opens the menus Opens the Fax menus Opens the Scan menus Opens the printer menus. The menus are available only when the printer is in the Ready state. Opens the File Transfer Protocol (FTP) menus Shows the current printer status such as Ready or Busy. Note: Make sure the Ready appears before performing any task. Shows printer conditions such as Toner Low Shows intervention messages and gives instructions so the printer can continue processing. Displays a warning or error message whenever the printer requires intervention to continue processing. Touch this button to access the messages screen for more information on the message. Displays the files on a USB drive. Allows you to create, organize, and save a set of bookmarks (URL) into a tree view of folders and file links. Displays all the held jobs Displays all current held jobs If this button is shown, then there are held faxes with a scheduled hold time previously set. To access the list of held faxes, touch this button. This button appears on the screen when the printer is unlocked and a password has been set. Touching this button opens a password entry screen. Enter the correct password to lock the printer control panel. This button appears on the screen when the printer is locked. The printer control panel buttons and shortcuts cannot be used while this appears. Touching this button opens a password entry screen. Enter the correct password to unlock the printer control panel. Searches on any of the following items and returns search results: User names for held or confidential print jobs Job names for held jobs, excluding confidential print jobs Profile names Bookmark container or job names USB container or job names for supported extensions only Opens the Cancel Jobs screen. The Cancel Jobs screen shows three headings: Print, Fax, and Network. The following items are available under the Print, Fax, and Network headings: Print job Copy job Fax profile FTP send Each heading has a list of jobs shown in a column under it which can show only three jobs per screen. If more than three jobs exist in a column, then an arrow appears enabling you to scroll through the jobs. Launches the Change Keyboard Language pop-up window that allows you to temporarily change the primary language of the keyboard screen Note: After the primary displayed language has been changed and the home screen is not used for a period of time it returns to the default primary language. Opens a context-sensitive Help feature within the display touch screens Depending on your configuration, not all buttons may appear. For a complete listing of Home Screen buttons and their functions, please see the Lexmark C925 or X925 User s Guide. For Training Purposes Only 42

51 X925 Administrative (Customer) Menu For a complete listing of the printer menu tree, consult the User s Guide. Not all menus are available for all models (ex. Wireless Menus). The menus commonly accessed are highlighted in blue. X925 Administrative (Customer) Menu Tree Supplies Menu Paper Menu Reports Network/Ports Replace Supplies Default Source Menu Settings Page Active NIC Cyan Cartridge Paper Size/Type Device Statistics Standard Network * Magenta Cartridge Substitute Size Network Setup Page Standard USB Yellow Cartridge Paper Weight Network [x] Setup Page Parallel [x] Black Cartridge Paper Loading Shortcut List Serial [x] Cyan Imaging Unit Custom Types Fax Job Log SMTP Setup Magenta Imaging Unit Custom Names Fax Call Log Yellow Imaging Unit Custom Scan Sizes Copy Shortcuts Black Imaging Unit Universal Setup Shortcuts Separator Roll and Pick Assembly Fax Shortcuts Waste Toner Bottle FTP Shortcuts Fuser Profiles List Transfer Module Print Fonts Print Directory Print Demo Asset Report Security Settings Help Manage Shortcuts Edit Security Setups General Settings Print All Guides Fax Shortcuts Miscellaneous Security Settings Copy Settings Copy Guide Shortcuts Confidential Print Fax Settings Guide FTP Shortcuts Disk Wiping Settings Fax Guide Profile Shortcuts Security Audit Log FTP Settings FTP Guide Set Date and Time Flash Drive Menu Print Defects Guide Print Settings Information Guide Supplies Guide * Depending on the printer setup, this menu item appears as Standard Network, Wireless Network, or Network <x>. For Training Purposes Only 43

52 X925 Service Menus Several hidden menus exist to configure advanced settings, troubleshoot problems or obtain additional printer information. The settings contained in these menus should not be changed unless it is specifically requested by the Service Manual or technical support. Changing the settings may cause improper operation of the printer. For a complete list of these menus, consult the Service Manual. To enter the Diagnostic Menu, do the following: Diagnostics Mode Configuration Menu Network SE Menu SE Menu Invalid Engine Code Recovery Mode 5. Turn off the printer. 6. Press and hold 3 and Turn on the printer. 8. Release the buttons when the splash screen appears. To enter Configuration Menu, do the following: 5. Turn off the printer. 6. Press and hold Right 2 and Turn on the printer. 8. Release the buttons when the splash screen appears. To enter the Network SE Menu, do the following: 4. Enter Network/Ports>Standard Network>Std Network Setup menu. 5. Press and hold 9, 7 and Release the buttons when the Network SE Menu appears. From a browser, add /se to the device IP address. (for example: To enter the Invalid Engine Code state, do the following: 5. Turn off the printer. 6. Press and hold Right 3, 4 and Turn on the printer. 8. Release the buttons when the splash screen appears. To enter Recovery Mode, do the following: 5. Turn off the printer. 6. Press and hold 2, 7 and Turn on the printer. 8. Release the buttons when the splash screen appears. The Diagnostics Menu contains advanced settings and operations used for repair, adjustments or other diagnostic actions. The Configuration Menu contains a set of menus, settings and operations which are infrequently required by a user. Generally, the options made available in this menu group are used to configure a printer for operation. You do not POR the machine to access this menu. Configure or reset advanced Network settings. This state allows you to POR the printer into a mode that disables the Engine Code and allows the programming of new code into the Engine card. Typically this function is used to reprogram defective Engine code but can be useful in other applications. This mode will allow the printer to boot from a secondary set of instructions to allow a code flash to the printer. No other functions are available. The screen will have a red background and say "Recovery". While in this mode, you can ONLY flash code via USB directly connected to a PC. For Training Purposes Only 44

53 1. In the Administration (Customer) Menu, select the Network/Ports Menu. 2. Select Standard Network. Network SE Menu 3. Select STD NET SETUP. The Network SE menu contains advanced network menu tools. Warning: Changing the settings within this menu may cause the printer not to function properly. 4. Once in the Standard Network Setup page, press 9, 7 and 6 at the same time. 5. Once you press the buttons, you should be in the Network SE Menu. For Training Purposes Only 45

54 Print Quality Diagnostic Tips General Terminology Before diagnosing print quality problems, take a moment to understand the concepts below. This will prevent confusion when diagnosing or escalating a problem. 1. Know your paper orientation when diagnosing a print quality issue. - References to direction such as horizontal and vertical must be made holding the paper in portrait orientation (long edges to the left and right) with the printed side facing you. Don t hold the paper in landscape orientation. See below. 2. Know the direction of the print when diagnosing a print quality issue. 3. References to the Process or the Scan direction mean the following (see picture below): Scan or Scanning is the direction in which the LED or laser writes to the photoconductor and is across the paper path. Process is the paper s direction through the printer that corresponds to the rotation of the photoconductors. Note: This printer uses LED Printheads which fire a simultaneous beam across the length of the photoconductors. Laser Printheads, on the other hand, fire a scanning beam across the photoconductor. For Training Purposes Only 46

55 Print Quality Rules of Thumb If you encounter print quality problems, follow the tips below. Following these simple rules may solve the problem easily and quickly. 1. Always run a new Menu Settings, Device Statistics or other printer configuration page showing the: - Page Count Is it time for a maintenance kit? - Supply Life are any of the supplies low or exhausted? - Firmware/Code Levels Are the code levels old/obsolete? - Media Settings does the printer media settings match what is in the Trays? 2. Always check the Media Type, Size, Weight and Texture that is currently being used. - Is the media Type, Size, Weight and/or Texture within the printer s manufacturing specification? - Is the printer s paper settings configured properly for the media that is used? You can configure a media s Type, Weight and Texture in the paper menu! - Are the printer and/or Driver set correctly for the paper type/size? 3. Always print the printer s Self Test pages (Print Quality Pages or other self test pages). - How does the print vary from what is expected? 4. Try reseating the supplies. - Check for damage to the components as you reseat them. 5. Try swapping the Color Unit Assembly (Toner Cartridge + Developer) to see if a problem follows the supply. 6. Try stopping during mid-print. Is the problem on the Transfer Belt or Photoconductor? 7. For tricky problems, think about the Electrophotographic Process steps. Eliminate the components/areas that couldn t cause the problem until you are finally left with what could. For Training Purposes Only 47

56 Paper Transport Diagnostic Tips Paper Rules of Thumb Paper jams and feed problems occur for numerous reasons. Sometimes, failure of the equipment is the cause or it can be the result of other external factors. Before replacing parts for a feed problem, ask these questions: Is the customer using a supported media type? This is a common problem. Check the printer specifications in the Service Manual or User s Guide if you are not sure. Is the customer using a supported media size? Check the printer specifications in the Service Manual or User s Guide if you are not sure. Is the customer using a supported media weight? This is a common problem. Check the printer specifications in the Service Manual or User s Guide if you are not sure. Have you tried printing with a fresh ream of paper? Paper that is left out of the package for periods of time can dry out or absorb moisture. Have you tried printing from a different input source? This will help narrow down the cause of some problems. Is too much paper loaded in the Tray? Make sure the stack height does not exceed the indicated maximum height. Is the paper in the Tray wrinkled, creased, damp, or curled? Paper will not feed properly if it is damaged. Try a fresh ream of paper. Are different media types and/or weights loaded in the Tray (i.e. the customer has both plain paper and cardstock loaded)? This will cause misfeeds. Is the relative humidity too high? Too low? This can affect the media and/or printer and its ability to feed properly. Check the printer specifications in the Service Manual or Technical Reference Guide to see if it is located in an ambient environment. Is the paper loaded properly in the Tray or option? This is a common problem. Reposition the paper in the Tray or option to make sure that is loaded properly. The paper guides should be flush against the media, but not too tight. Are the feed rollers worn because it is time for a maintenance kit? Check the page count of the printer to see if it is time for a maintenance kit to be installed. Are there any obstructions in the paper path? If paper, staples, paper clips or other items are in the printer, they can prevent the media from feeding properly. Save yourself time and effort and always check these external influences before spending time troubleshooting a supposed equipment failure. For Training Purposes Only 48

57 Fax Print Quality Diagnostic Tips Because a fax is composed of three main parts spanning two different machines, pinpointing a print quality issue can be challenging. An important step in troubleshooting is to isolate the source of the print quality problem by simple troubleshooting methods. Below is a chart outlining the troubleshooting steps to determine if the sending fax, receiving fax or phone line is the problem source. Please keep in mind that this chart only covers general print quality issues. For more detailed information, it is recommended that you complete Lexmark s online course called MFP Overview. Receiving Fax Quality is poor Test Receiving Fax Print the Print Quality Pages in the Receiving Fax. Yes Do the pages look normal? No Test the Sending Fax Use the Copy function in the Sending Fax. See Receiving Fax Machine at Fault on page 51 Yes Do the pages look normal? No See Phone Line at Fault on page 51 See Sending Fax Machine at Fault on page 50 For Training Purposes Only 49

58 Document Print Receiving Fax Document Scan Analog Phone Line Transmission Sending Fax Sending Fax Machine at Fault Problem Description: Problems with print quality at the receiving fax, such as corrupt images, lines in the image, top/bottom cut off. When you test the Sending Fax by using the Copy function you can reproduce the print quality problem. Most Likely Cause: Resolution: Dirty flatbed or hardware failure in the scanner. Clean the flatbed glass. If the original document is being sent from the ADF, try printing a copy with the original document placed on the flatbed glass. If this solves the problem, the problem is in the ADF. For Training Purposes Only 50

59 Receiving Fax Machine at Fault Problem Description: Problems with print quality at the receiving fax, such as corrupt images, lines in the image, top/bottom cut off. When you test the Receiving Fax by printing the Self Test pages you can reproduce the print quality problem. Most Likely Cause: Resolution: Low supplies, dirt or contamination in the printer, hardware failure. Check the supply levels by pressing the button on the operator panel or printing a Menu Settings page from the Reports menu. Check the printer for accumulation of dust or debris. Follow standard troubleshooting procedures for print quality problems. Phone Line at Fault Problem Description: Problems with print quality at the receiving fax, such as corrupt images, lines in the image, white horizontal lines, missing rows or top/bottom cut off. When you test the Sending Fax and Receiving Fax you cannot reproduce the print quality problem. The problem only occurs during faxing. Most Likely Cause: Resolution: Noise in the phone line, incoming call (call waiting), incorrect setup of dial type, line type, reception mode or electrical interference. Check/setup the dial type, line type and reception mode. If the phone line is part of a DSL connection, check to see if a Splitter (Line Filter) is installed or replace the Splitter. Disable Call Waiting if it is enabled. Check the telephone line for static or other noises. Remove any electronic equipment (i.e. televisions, microwaves, etc.), motorized devices or wireless/broadcasting equipment that may be located near the fax machine. Electrical interference from the equipment may degrade the telephone line condition. For Training Purposes Only 51

60 Complex Parts and Procedures Parts listed in this section are complex for various reasons and are tagged with one or more of the following icons to explain its complexity: High degree of technical difficulty in removing/replacing the part. Complex/lengthy instructions. Special procedures required before, during or after part installation. Increased likelihood of servicer error resulting in additional problems, malfunction of the machine or damage. The instructions for removal, installation and/or special adjustments can be found in the C925 or X925 Service Manuals. Follow the instructions carefully to avoid additional errors, malfunction or breakage. For your awareness, the most complex parts include the ones listed below. When removing, replacing or reinstalling these parts, follow the instructions carefully! Part Complexity Toner Sensors Paper Feed Unit Duplex Unit Sub-Drive Assembly RIP Board ADF Assembly Flatbed Assembly CCD Assembly Operator Panel UICC Card Printhead Controller Board Engine Board ICC Board (Scanner ICC Board) For Training Purposes Only 52

61 Toner Sensors These sensors are buried in the machine and a number of other parts (including some frame pieces) must be removed in order to access the sensors. This removal is tedious and has an increased chance to result in a malfunction or print quality problem after repair. Paper Feed Unit To remove the paper feed unit, a number of other parts must be removed first which increases the likelihood of additional failures when the machine is reassembled. The actual replacement of the unit itself is not complex. The Paper Feed Unit must be removed to replace the pick rollers when a maintenance kit is installed. Duplex Unit To remove the duplex unit, a number of other parts must be removed first which increases the likelihood of additional failures when the machine is reassembled. The actual replacement of the unit itself is not complex. Sub-Drive Assembly To remove the Sub-Drive Assembly, a number of other parts must be removed first which increases the likelihood of additional failures when the machine is reassembled. The removal on the X925 is more complex than the C925 due to interference by the Scanner Unit. RIP Board This part contains Mirrored NVRAM, so it should never be replaced at the same time as other Mirrored NVRAM components. See the Mirrored NVRAM Components section in this guide for complete details and exceptions. In addition, the Rip Board contains the default and custom esf applications and settings. These are NOT contained in the NVRAM or hard drive, therefore, a RIP Board failure could result in loss of these applications and their settings if they are not backed up. When a new RIP Board is installed, the Lexmark default esf applications and settings are loaded. The best practice is for an administrator to have their esf applications and settings backed up prior to encountering a problem. In case this hasn t been done, however, an attempt to back up the data should be performed before replacing the RIP Board. See the following page for instructions on how to back up the esf applications and settings. For Training Purposes Only 53

62 To back up the solutions, do the following: 1. Turn off the printer. 2. Press and hold 3, 4 and Turn on the printer. 4. Release the buttons when the splash screen appears. 5. Access the printer's Web Page from a web browser. 6. Click on Settings For Training Purposes Only 54

63 7. Click on Solutions (don t click Import/Export the explanation is at the end) 8. Click on Embedded Solutions For Training Purposes Only 55

64 9. Select each application individually by clicking on the name (we ll use Forms and Favorites in this example) 10. Click on Export to create a file of that application s settings 11. If the Web page cannot be accessed, or an error persists despite trying to boot in Invalid Engine code mode, then there is no way to backup the esf apps. Make the customer aware of this. For Training Purposes Only 56

65 12. Don t Use the Global Import/Export method to back up the esf applications and settings. There is a size limit of 128kb on the export file. 13. Customers with a large number of applications or settings may exceed the file size limit and have information truncated in the exported file. NO! 14. Once the new RIP board is installed, follow the same steps as above, however, you will Import (instead of export) the <filename>.ucf file for each application. ADF Assembly Flatbed Assembly CCD Assembly If the ADF, Flatbed or CCD assembly is replaced, you should perform the scanner calibration: Resetting the Calibration Values resets the scanner calibration values Calibrating the Scanner Black Levels adjusts the black levels of the scanner (this adjustment is subjective based on what looks good to the customer). Adjusting the ADF Magnification adjusts the bottom margin only Adjusting the Scanner Registration adjusts the margins on the Flatbed scan, Front ADF and Back ADF Note: Skew should not need to be adjusted on this scanner as it adjusts automatically. For Training Purposes Only 57

66 Mirrored Printhead Settings Components Engine Board Printhead Controller Board The C925 and X925 printers have a unique mirror between the Printhead Controller Board and Engine Board for the four LED Printhead settings. Unlike previous printers such as the C920, you do not need to manually adjust the Light Values for an LED if it is replaced nor do you swap EEPROMs between the boards. This mirror is similar to the printer s System and Secure NVRAM Mirror, however, these settings are strictly printhead related. If the Printhead Controller Board is replaced with a new board, the mirrored settings in the Engine Board are loaded on the new Printhead Controller Board. Conversely, if the Engine Board is replaced, the mirrored settings in the Printhead Controller Board are loaded on the new Engine Board. Warning! To avoid losing all settings, NEVER replace both the Printhead Controller Board and Engine Board at the same time. If both need to be replaced, install one, power on the printer then replace the other board after the settings are allowed to load. Mirrored NVRAM Components Operator panel UICC Card ICC Board (Scanner ICC Board) RIP Board - X925 Only Warning! Observe all ESD precautions while handling electronic parts. Warning! When replacing any one of the NVRAM components: Only replace ONE component at a time NEVER replace both at once. Perform a POR before replacing the second component. If this procedure is not followed, the printer will be rendered inoperable. These components mirror the critical NVRAM settings for the printer. If you have not already done so, complete the online course Mirrored NVRAM from Lexmark s online learning site. Warning! If you must use one of the components listed above as a method of troubleshooting, boot the printer into Diagnostic mode only. This will prevent the NVRAM from copying to the new component. If the printer is allowed to boot normally, however, the NVRAM will copy to the new component and it cannot be used in another printer. It must be returned to the manufacturer. For Training Purposes Only 58

67 Other Special Instructions The instructions listed in this section may need to be performed under certain circumstances such as repair, troubleshooting or other reasons. Cleaning the MFP Document Glass X925 Only It is important to clean the MFP on a regular basis (about once a month depending on usage) to keep it functioning properly. You should also clean the scanner glass if you encounter print quality problems such as streaks on copied or scanned images. Note: Clean both areas of the scanner glass and both white underside areas. Warning! Always turn the printer OFF and unplug it before cleaning. Slightly dampen a soft, lint-free cloth or paper towel with water. Do not use any kind of cleaning agent to clean the glass. Do not spray liquid on the glass. Wipe the white underside of the ADF cover until it is clean and dry. Wipe the white underside of the scanner cover until it is clean and dry. Wipe the scanner glass until it is clean and dry. Wipe the ADF glass until it is clean and dry For Training Purposes Only 59

68 Security Reset Jumper The C925 and X925 printers have a Security Reset Jumper on the RIP which can be used in the event the Administrator password is forgotten (see pictures below). The Security Jumper effect can be configured through the Security Menu on printer s web page or menus. The choices for the Security Reset Jumper effect are listed below: No Security (default setting) Resets the value of each Access Control to No Security. This option preserves all custom security templates and building blocks, however, they will no longer be applied to a function. This option allows the Administrator to create a new password with no loss to some customizations. Reset to Defaults Erases all Security Templates, Building Blocks, Access Controls and passwords that a user has defined and returns the printer security to its original state. This option is not recommended unless a complete reset of the Security Menu is desired. No Effect The position of the security jumper is ignored. No settings will be erased or changed in any way. This option is NOT recommended because passwords cannot be recovered easily; it would require RIP Board replacement at the cost of the customer (this is not a manufacturing or warranty problem). In general, when a jumper is installed over two or more jumper pins, this causes an electrical connection to be made. A predefined set of instructions is programmed on the circuit board which executes depending on the jumper configuration detected. Note: Administrators can discourage tampering with the Security Jumper by securing the entire RIP card cage with a Kensington lock For Training Purposes Only 60