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HP Color LaserJet CM4730 MFP
Service Manual

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   Summary of Contents for HP LaserJet CM4730

  • Page 1

    HP Color LaserJet CM4730 MFP Service Manual...

  • Page 2

    Install DDR memory DIMMs ................30 Install a flash memory card ................30 Enabling memory ....................31 Install an HP Jetdirect or EIO print server card ..............31 Test the MFP operation ........................35 Sleep and wake ........................... 36 Connecting to a computer or network ....................37 Parallel connection ......................

  • Page 3

    UNIX ........................51 Network utilities ........................51 HP Web Jetadmin ....................51 Embedded Web server ..................52 HP Easy Printer Care software ................53 Other components and utilities ................53 Network configuration .......................... 54 Configure TCP/IPv4 parameters ..................54 Change the IP address ..................54 Set the subnet mask ..................

  • Page 4

    Information pages ......................102 HP Easy Printer Care software ..................102 Supported operating systems ................102 Open HP Easy Printer Care software .............. 102 HP Easy Printer Care software sections ............102 Embedded Web server ..................... 104 Open the embedded Web server ..............104...

  • Page 5

    Networking tab ................. 106 Other links ..................106 HP Web Jetadmin software ....................107 HP Printer Utility for Macintosh ..................107 Open the HP Printer Utility ................107 Print a cleaning page ..................108 Print a configuration page ................108 View supplies status ..................

  • Page 6

    Performing preventive maintenance ....................128 ADF maintenance kit ......................128 Calibrate the scanner ........................129 Set the real-time clock ........................130 Set the date format ......................130 Set the date ........................130 Set the time format ......................130 Set the time ........................130 4 Theory of operation Basic operation ..........................

  • Page 7

    Sub power supply fan failure detection ............148 ETB fan failure detection .................. 148 Low-voltage power supply ....................148 Fuser control circuit ..................149 Low-voltage power supply circuit ..............151 Protective functions ................. 152 Safety ....................152 Sleep mode ..................152 Power supply recognition ..............

  • Page 8

    Cartridge presence detection .................... 174 Memory tag detection ..................174 Photosensitive drum detection ................. 174 Developing cylinder disengaging control ............175 ETB (electrostatic transfer/transport belt) ................. 175 Transfer roller (Y, C, M) engagement/disengagement detection ........177 Transfer roller engagement/disengagement control ............177 Calibration and cleaning ....................

  • Page 9

    ADF jam ..........................211 Registration sensor jam ................... 212 Read sensor jam ....................212 Exit sensor jam ....................212 ADF cover-open jam ......................212 ADF open jam ........................212 2 X 500-sheet paper feeder ....................... 213 Pickup and feed operations ....................214 2 X 500-sheet jam detection .....................

  • Page 10

    Before performing service ....................261 After completing service ....................261 Screws used in the MFP ....................262 Service approach ..........................263 User-replaceable parts ........................264 Print cartridges ........................265 Control panel overlays ...................... 267 Control panel ........................267 Intermediate paper transfer unit (IPTU) ................269 Stapler/stacker ........................

  • Page 11

    Main drive assembly ......................344 Rail holder assembly ......................359 Rail guide assembly ......................361 Formatter case assembly ....................364 Laser/scanner components ....................370 Duplexing assembly ......................377 Delivery assembly ......................379 Fuser drive assembly ......................387 Motors and fans ..........................388 Drum motors ........................

  • Page 12

    ADF leading-edge and paper-present sensors ..............457 ADF hinges ........................458 2 X 500-sheet paper input assembly components ................460 Rear cover ........................461 Right front cover ........................ 462 Left front cover ........................463 Right cover ........................464 Left cover .......................... 466 Right lower cover assembly ....................

  • Page 13

    Understand accessory lights for the 3-bin mailbox and stapler/stacker ..........550 Understand lights on the formatter ....................551 HP Jetdirect LEDs ......................551 Heartbeat LED ........................551 Replacement parts configuration ....................... 552 Formatter and DC controller ..................... 552 Formatter (new or previously installed in another MFP) ........... 552 DC controller (new or previously installed in another MFP) ..........

  • Page 14

    Calibrate the MFP ......................604 Repetitive defect ruler ....................... 604 Manage color ............................. 606 Understand color variations ....................606 Use color ........................... 606 HP ImageREt 3600 ..................606 Paper selection ....................607 sRGB ........................ 607 Color options ........................607 Restrict color use ..................... 607 Restrict color printing ...............

  • Page 15

    Upgrade the firmware ........................659 Determine the current firmware version ................659 Download new firmware from the HP Web site ..............659 Transfer the new firmware to the MFP ................659 Use FTP to upload the firmware through a browser ........659 Use FTP to upgrade the firmware on a network connection ......

  • Page 16

    Use HP Web Jetadmin to upgrade the firmware ..........661 Use MS-DOS commands to upgrade the firmware ......... 661 Use the HP Jetdirect firmware ..................661 7 Parts and diagrams Introduction ............................664 Ordering parts and supplies ......................665 Parts that wear ........................665 Parts ..........................

  • Page 17

    Power consumption ......................832 Toner consumption ......................832 Paper use .......................... 832 Plastics ..........................832 HP LaserJet print supplies ....................832 Return and recycling instructions ..................833 United States and Puerto Rico ................. 833 Multiple returns (two to eight cartridges) ......... 833 Single returns ..................

  • Page 18: Problem Solving

    Problem solving ● Problem-solving process ● Control-panel messages ● Understand accessory lights for the 3-bin mailbox and stapler/stacker ● Understand lights on the formatter ● Replacement parts configuration ● Paper path troubleshooting ● Correct print quality and copy quality problems ●...

  • Page 19

    Ensure that the print media that you are using meets specifications. See Media specifications on page Print a configuration page. If the MFP is connected to a network, an HP Jetdirect page also prints. If the pages do not print, check that at least one tray contains print media.

  • Page 20: Parts And Diagrams

    Parts and diagrams This chapter contains information about ordering parts, supplies, and accessories. It includes diagrams of the major subassemblies of the MFP and includes the part numbers for replaceable parts. ● Introduction ● Ordering parts and supplies ● Assembly locations ●...

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