Fax quality is poor | HP CLJ M375NW PRO 300 CE903A#BGJ, M475 CE863A

Fax quality is poor

Fax is blurry or light.

●Increase fax resolution when sending faxes. Resolution does not affect received faxes.

a.Open the Setup menu.

b.Open the Fax Setup menu.

c.Open the Advanced Setup menu.

d.Open the Fax Resolution menu.

e.Select the correct setting.

NOTE: Increasing resolution slows transmission speed.

●Turn on the Error Correction setting from the control panel.

a.Open the Setup menu.

b.Open the Service menu.

c.Open the Fax Service menu.

d.Open the Error Correction menu.

e.Select the On setting.

●Check the print cartridges and replace if necessary.

●Ask the sender to darken the contrast setting on the sending fax machine, and then resend the fax.

Fax cuts off or prints on two pages

●Set the Default Paper Size setting. Faxes print on a single size of paper based on the Default Paper Size settings.

a.Open the Setup menu.

b.Open the System Setup menu.

c.Open the Paper Setup menu.

d.Open the Default Paper Size menu.

e.Select the correct setting.

●Set the paper type and size for the tray used for faxes.

●Turn on the Fit to Page setting to print longer length faxes on letter or A4 size paper.

a.Open the Setup menu.

b.Open the Fax Setup menu.

ENWW	Solve fax problems 241

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HP CLJ M375NW PRO 300 CE903A#BGJ, M475 CE863A manual Fax quality is poor, Fax cuts off or prints on two pages

Contents

M375 M475 Page Page Trademark Credits Copyright and License Conventions used in this guide Conventions used in this guide Table of contents Enww Solve problems 111 Enww Load Tray 1 Type SIZE, Press OK to use available media Enww Enww Enww Parts and diagrams 245 Appendix a Service and support 279 289291 Enww Index 313 List of tables Xviii List of figures 35 Remove the rear door simplex product 1 74 Reinstall the left cover 1 115 Remove the fuser-motor assembly 4 Rollers 124 Xxiv Removal and replacement Removal and replacement strategy Removal and replacement strategyIntroduction Required tools Electrostatic discharge Types of screws Common fastenersDescription Size Part Number Service approach Before performing serviceAfter performing service Test 3 fax-quality test fax models only Post-service testsTest 1 print-quality test Test 2 copy-quality test 2Parts removal order 1 Parts removal order 3Parts removal order 2 Removal and replacement Removal and replacement procedures Rollers and padsTransfer roller Pickup roller Tray 2 and Tray 4Remove the pickup roller 1 5Remove the pickup roller 2 Removal and replacement 6Remove the pickup roller 1 Separation roller Trays 2 or Enww 9Reinstall the separation roller Reinstall the separation roller Document feeder pickup roller assembly Pickup roller and separation pad Tray 13Remove the Tray 1 pickup roller 2 Removal and replacement 15Remove the Tray 1 separation pad Print-cartridge drawer Main assemblies Enww Dimm cover Right cover 22Remove the right cover 3 Removal and replacement 24Remove the document feeder input tray 2 Document feeder input tray 25Remove the scanner assembly 1 Remove four screws callout Scanner assembly Enww Right-front cover and power button Enww Rear-upper cover duplex product 30Remove the rear-upper cover 2 Removal and replacement 32Remove the feed assembly 2 Paper-feed guide assembly Rear-door stopper and link caps simplex product 36Remove the rear door simplex product 2 Rear door simplex product Enww 40Remove the rear door duplex product 2 Rear door duplex product Enww Rear cover and feed guide simplex product Before proceeding, remove the following componentsRemove the rear cover and feed guide simplex product Remove three screws callout Enww Enww Rear-lower cover and rear-door links duplex product Enww Enww Enww Remove the rear-door rib assembly duplex product Rear-door rib assembly duplex product Enww 58Replace the link guide simplex products Link guide Control panel and right-arm mount 63Reinstall the control panel and right-arm mount 1 Reinstall the control panel and right-arm mount Enww Remove the upper-cover assembly Upper-cover assembly Enww 69Reinstall the upper-cover assembly 2 Reinstall the upper-cover assembly Enww Remove the left cover Left cover 73Remove the left cover 3 Removal and replacement 75Reinstall the left cover 2 Reinstall the left cover Remove the front-door assembly Front-door assembly 78Remove the front-door assembly 3 Enww Enww Push the black-plastic arm into the product Reinstall the front-door assembly 85Remove the front-door assembly 10 Enww 89Remove the ITB 2 Intermediate transfer belt ITB 91Remove the ITB 4 Removal and replacement 93Remove the ITB 6 Reinstall the ITB Diagnostics 95Remove motor M1 and motor M2 1 Drum motor M1 and developer motor M2 96Remove motor M1 and motor M2 2 Removal and replacement 97Remove motor M1 and motor M2 3 Release one tab callout 100Remove motor M1 and motor M2 6 Reinstall the drum motor M1 and developer motor M2 Intermediate PCA Formatter PCA and fax PCA Replacing the formatter PCA before the DC controller PCARemove the formatter PCA and fax PCA 104Remove the formatter 1 of 4 base model 106Remove the formatter 3 of 4 base model 108Remove the wirelss PCA 1 Remove the wireless PCA callout Wireless PCA DC controller PCA Replacing the DC controller PCA before the formatter PCABefore you proceed, remove the following components 110Remove the DC controller PCA 1 Remove the DC controller PCA Enww Remove the fuser-motor assembly Fuser-motor assembly Enww Enww Reinstall the fuser-motor assembly 117Remove the fuser-motor assembly 6 Remove the high-voltage power-supply PCA High-voltage power-supply PCA Enww Enww Remove the color-misregistration sensor assembly Color-misregistration sensor assembly 126Remove the color-misregistration sensor assembly PCA 3 Reinstall the color-misregistration sensor assembly 127Remove the color-misregistration sensor assembly PCA 4 Enww Fan FM1 131Remove the fan FM1 2 Remove the USB PCA USB PCA fax/memory-card models Remove the duplex-reverse drive assembly Duplex-reverse drive assembly Release the wire harnesses from the retainer callout 136Remove the duplex-reverse drive assembly 4 Fuser 137Remove the fuser 1 Remove the fuser Enww 141Remove the fuser 5 142Remove the fuser 6 144Remove the fuser 8 145Reinstall the fuser Removal and replacement Reinstall the fuser Remove the paper-delivery assembly Paper-delivery assembly Enww 149Remove the paper-delivery assembly 4 Tray cassettes and optional Tray 3 assembly Solve problems Solve problems checklist Print a menu map Menu map Troubleshooting process Pretroubleshooting checklistGeneral topic Questions Power-on checks Troubleshooting tools Component diagnosticsLED diagnostics Test the control-panel buttons Component testsControl-panel tests Test the control-panel display Plug/jack locations Diagrams Location of connectors Connector BoardDC controller PCA Enww Location of major components Major components1Major components Enww 2Solenoid, sensors, and motors Motors and fans Item Description Rollers PCAs PCAs 5Optional 250-sheet cassette Optional 250-sheet cassette General timing diagram General circuit diagram 129 Asic diagram HVT / Toneremp Driver PCA1-1 Environment Sensor FSR diagram Diagram Internal print quality test pages Print quality troubleshootingPrint the Configuration Service Print the cleaning Print-quality troubleshooting toolsClean the paper path Print the Service Calibrate the product from the control panel Setup MenuControl panel menus Calibrate the product Menu item Description HP Web Services menu Reports menu Menu item Sub-menu item Description Quick Forms menu Menu item Sub-menu item Description Fax Setup menu Menu item Sub-menu item Private Receive Off System Setup menu Bottom on Adjust Tray X1 ShiftUse the Y Shift setting to center the image from top to Side on the first side of a two-sided USB Flash Drive Disable FaxOff Supply Settings Black Cartridge Very Low Setting Prompt Product Security Yellow Color Cartridges Very Low Setting StopPrint Black Low Threshold Cyan Enter percentage Magenta Dark Color Copy Store Usage Data On SupplyNot on Supply Courier Font Regular Service menu Restore Defaults HP SmartInstall Off Network Setup menu ID Copy Function specific menusCopy menu Sets the product so that it communicates only with Web Specifies the paper size and type Fax menu Allows you to cancel pending fax Displays pending fax jobs,Jobs Scan menu Opens the Fax Setup menu Control panel messages 10.100X Supply Memory ErrorInterpret control panel messages Control panel message types Error, Turn off then on Fuser ErrorScanner Error Fan Error, Turn off then on Error Turn off then onBlack Cartridge Low Black Very Low Canceled scan. Clear documentCanceled send. Clear document Black in wrong position Cyan Very Low Communication errorCyan Cartridge Low Cyan in wrong position Document feeder jam. Clear and reload Device error, press OKDevice is busy. Try again later Document feeder door is open Door open Engine Communication ErrorEngine error. Press OK to continue Document feeder mispick. Reload Fax is busy. Canceled send Fax receive errorFax is busy. Redial pending Fax storage is full. Canceling the fax receive Fax Send error Fit to Page on flatbed only Fax storage is full. Canceling the fax sendGenuine HP supply installed Install color cartridge Jam in Tray 1, Clear jam and then press OK Invalid driver Press OKInvalid entry Jam in area, Open door and clear jam Magenta in wrong position Load Tray 1, Plain Size / Cleaning mode, OK to startLoad tray X Press OK for available media Magenta Cartridge Low Memory is low. Try again later Manual Duplex Load Tray 1, Press OKManual feed Size TYPE, Press OK to use available media Memory is low. Press OK No dial tone No fax answer. Canceled sendMemory low Only 1 copy made. Press OK to continue Misprint, Press OK No fax detected No fax answer. Redial pending Remove shipping locks from cartridges Print failure, press OK. If error repeats, turn off then onScanner error #, Turn off then on Remove shipping lock from color cartridge Unexpected size in tray # Load size Press OK Scanning error Cannot connectSettings cleared Scanner reserved for PC scan Used supplies in use Used color installed, to accept press OKUnsupported color Press OK to continue Used color in use Event-log messages Yellow in wrong positionYellow Very Low Print the event log Event log messagesEvent-log messages Event code Description 7Event-log messages Event-log-only messages Description Solution 8Event-log-only messages Event code Description Solution Clear jams Common causes of jamsJam locations Clear jams from the document feeder Enww Clear jams in Tray Enww Enww Clear jams in Tray Clear jams in the fuser area Clear jams in the output bin Clear jams in the duplexer duplexing models only Enww Solve paper-handling problems Product picks up multiple sheets of paperProduct does not pick up paper Solve image-quality problems Problem CausePrint quality examples AaBbCc Problem Cause Solution Severity of the defect Continue Black Color image defects AaBbCc Clean the paper path from the product control panel Clean the productClean the pickup and separation rollers Clean the paper path Clean the scanner glass strip and platen Clean the document feeder pickup rollers and separation pad Clean the touch screen Factors affecting print performance Solve performance problems Print speeds Product does not print Product does not print or it prints slowly Product prints slowly Computer is using the incorrect IP address for the product Solve product connectivity problemsSolve direct-connect problems Solve network problems Solve wireless network problems Computer or workstation might be set up incorrectlyComputer is unable to communicate with the product Wireless connectivity checklist Cannot connect more computers to the wireless product Wireless network is not functioning Network does not appear in the wireless networks list Service menu settings Service mode functionsService menu Secondary service menu Scan Calibration Calibrate Open the secondary service menuSecondary service menu structure 9Secondary service menu Product resets Restore the factory-set defaultsNvram initialization Enww Fax troubleshooting checklist Solve fax problems Enww Fax is busy. Canceled send Fax error messagesCommunication error Document feeder door is open. Canceled fax Fax is busy. Redial pending Fax receive error Fax storage is full. Canceling the fax receive Fax Send error Fax storage is full. Canceling the fax send No fax answer. Canceled sendNo dial tone No fax detected No fax answer. Redial pending Enww View and interpret fax error codes Troubleshoot fax codes and trace reportsCode number Fax trace report Fax logs and reports Print individual fax reports Print all fax reports Change error correction and fax speed Set the fax error reportSet the fax-error-correction mode Change the fax speed Solve problems sending faxesAn error message displays on the control panel Communication error. message displays Open the Error Correction menu No fax answer. message displays Fax is busy. message displays Fax storage is full. message displays Document feeder paper jam Unable to use fax functions from the control panel Faxes can be received, but not sent Unable to use group dials Unable to use speed dials Enww An answering machine is connected to the product Solve problems receiving faxesFax does not respond Fax has a dedicated phone line Answer Mode setting is set to the Manual setting Telephone handset is connected to the productVoice mail is available on the fax line Product uses a fax over IP or VoIP phone service Product is connected to a DSL phone service No fax detected. message displays Open the Advanced Setup menu Open the Fax Resolution menu Sender receives a busy signal Fax is received but does not printCannot send or receive a fax on a PBX line Faxes are sending slowly Solve general fax problems Fax cuts off or prints on two pages Fax quality is poor Enww Product updates Enww Parts and diagrams Order parts by authorized service providers Whole unit replacementOrderable parts 5Related documentation and software Related documentation and software Supplies and accessories Service partsPart number Cartridge number Description How to use the parts lists and diagrams Scanner and document feeder main assemblies Description Part number Qty Scanner and document feeder main assemblies Covers 2External panels and covers Parts and diagrams Covers1,2 Internal assemblies 1 Internal assemblies 8Internal assemblies 1 4Internal assemblies 2 Internal assemblies 2 9Internal assemblies 2 5Internal assemblies 3 Internal components 3 10Internal assemblies 3 A03 Internal assemblies 4 11Internal assemblies 4 7Internal assemblies 5 Internal assemblies 5 12Internal assemblies 5 8Internal assemblies simplex models Internal assemblies simplex models 13Internal assemblies simplex models 9Internal assemblies duplex models Internal assemblies duplex models Description Part number 14Internal assemblies duplex models 10 PCAs PCAs PCAs Sheet paper feeder optional Tray Input devices 16250-sheet paper feeder optional Tray 17Alphabetical parts list Alphabetical parts list Internal assemblies 5 Internal assemblies 4 Paper pickup assembly RM1-8045-000 18Numerical parts list Numerical parts list Covers1,2 on RM1-8051-000 Paper-pickup guide assembly duplex Enww Service and support HP Product Duration of Limited Warranty Hewlett-Packard limited warranty statement Hewlett-Packard limited warranty statement Enww Data stored on the print cartridge End User License Agreement Transfer Enww OpenSSL LJColorMFPM475 Customer support Product specifications Product Height Depth Width Weight Physical specificationsTable B-1Physical specifications Table B-2Environmental specifications1 Regulatory information Protecting the environment Power consumptionFCC regulations Environmental product stewardship program HP LaserJet print supplies Toner consumptionPaper use Plastics Shipping Residents of Alaska and Hawaii Non-U.S. returnsMultiple returns more than one cartridge Single returns Material restrictions Paper Chemical substances Material Safety Data Sheet Msds For more information Declaration of conformity Manufacturers Name Manufacturers AddressSupplementary Information Boise, Idaho USA OctoberFor regulatory topics only Enww Declaration of conformity wireless models Non-volatile memory Certificate of volatilityTypes of memory Volatile memory Power cord statement Japan Safety statementsLaser safety Vcci statement Japan Power cord instructions Luokan 1 laserlaite EMC statement Korea Laser statement for Finland Restriction on Hazardous Substances statement Ukraine GS statement Germany Additional FCC statement for telecom products US Additional statements for telecom fax productsEU Statement for Telecom Operation New Zealand Telecom Statements Industry Canada CS-03 requirements Telephone Consumer Protection Act US Enww Additional statements for wireless products Korean statement Enww Enww Index Symbols/Numerics 2ndary service menu Msds Jams USB Environmental 290 Physical Specks, troubleshooting 192 288 Macintosh customer support Material Safety Data Sheet Enww Page CE863-90966* *CE863-90966