ECU removal 3 | HP 3150 instruction

7Squeeze the speaker cover to release it from the bottom plate and lift it off the bottom plate.

Figure 72. ECU removal (3 of 4)

144 Removal and replacement

EN

Image 146

HP 3150 manual ECU removal 3

Contents

Page Page HP LaserJet 3100/3150 Product Warranty Copyright Information Contents Functional overview Troubleshooting Parts and diagrams Contents-7 Figures Fuser pressure plate removal 114 Page Page Contents-11 TablesPage Chapter contents Product Information Introduction Product features Product features Feature Description Performance specifications Category Specification Product specificationsPhysical specifications Category Specification Skew specifications Power specifications Category SpecificationOperating acoustical emissions per ISO 9296 specifications Model number C4256A Model and serial numbersModel number C3948A Product overview Document scanner path Printer path 1 Printer path 2 Rear view Regulatory information SafetyLaser safety statement Transportation Varoitus Laser statement for FinlandLuokan 1 laserlaite Klass 1 Laser Apparat Varning FCC regulations FCC part 68 requirements RJ11C Telephone consumer protection act U.S IC CS-03 requirements Conforms to the following Product Specifications Declaration of conformity Protecting the environment Canadian DOC regulationsEnvironmental product stewardship program This HP LaserJet printer design eliminates Ozone production HP LaserJet Printing Supplies Toner consumptionPaper use Paper Spare parts and consumables availability Material safety data sheet Installation and operation Operating environment Environmental requirements Category Requirement Output capacities Media requirementsInput for document feeder tray for document scanner path Storing opened toner cartridges Toner cartridge informationStorage conditions Toner Recycling Control panel Control panel layout Control panel messages Control panel messages Message Cause Clear Document From Scanner Control panel messages Message Cause Solution Communication Error Decoding Error # ConfigurationConfig. Tied Addr Encoding Error Fax Document was Lost Power failureFax Memory Error #number Unscanned Pages Modem Error #Memory Full Send Memory is Full Report When nothing was in memoryNo Memory for Erase/Print Please Add Paper Password must bePaper Bin is Empty Digits Or No Cartridge Cartridge is not installed properly Polling-In ErrorPrinter Comm Error Printer Cover Open Printer Motor Error Printer Laser ErrorCall for Service Problem has occurred with the print Engine Call for Service Engine Remote Fax was ErrorRedial Failed Busy Scan Reference Is not Assigned System ErrorSpeed Dial number Memory Had been received to memory Menu tree To print a menu tree Menu tree for the HP LaserJet 3100 product Menu tree for the HP LaserJet 3150 product Maintenance Life expectancies of consumables Life expectancies of consumables Cleaning and maintaining the equipment Cleaning the document scanner path Page Cleaning the print path Page Page Using a cleaning To use a cleaningPage Functional overview Basic configuration Basic functions Printer unit functional block diagram Printer functions ECU/power system ECU loads Print engine control system DC power distribution Power system on ECUAC power distribution DC power distribution High-voltage power distribution High-voltage power supply circuit Memory Formatter systemCentral processing unit Read-only memory ROM Parallel interface Draft modeRandom-access memory RAM Control panel Image formation system Toner cartridge Developing Primary chargingScanning exposure Separating Drum cleaningTransferring Fixing stage Printer feed system 9 10 11 Paper jam detection Solenoid, photosensors, and switches Solenoid, photosensors, and switches Document scanner system Simplified document path Basic sequence of operation formatter-to-printer Timing Period Purpose Remarks General timing diagram Removal and replacement Removal and replacement strategy Required tools Before performing serviceAfter completing service Covers Back cover To reinstall Back cover removal 2 Right side cover Right side cover removal Left side cover Left side cover removal Left front cover Left front cover removal Top cover Top cover removal RFI shield RFI shield removal Document scanner assemblies Printer door Printer door removal 2 Printer door removal 3 Document release door Document release door removal 1 Document release door removal 2 Upper guide assembly Upper guide assembly removal 1 Upper guide assembly removal 2 Contact image sensor Contact image sensor removal 1 Contact image sensor removal 2 Document scanner assembly/motor Document scanner assembly/motor removal 1 Document scanner assembly/motor removal 2 Document scanner pickup roller Document scanner pickup roller removal Internal assemblies LIU board Formatter board Formatter board removal 1 Formatter board removal 2 Metal side plate Metal side plate removal Exit roller Exit roller removal Delivery assembly Delivery assembly removal 1 Delivery assembly removal 2 Fuser pressure plate Fuser pressure plate removal Fuser pressure plate replacement Front casing Front casing removal Heating element Heating element removal 1 Heating element removal 2 Pressure roller Pressure roller guide removal Face-up/face-down lever Able to feel the spring’s release mechanism Fuser exit roller assembly Fuser exit roller assembly removal Paper exit sensor flag replacement Paper exit sensor flag Laser/scanner assembly Laser/scanner assembly removal Solenoid Solenoid removal 1 Solenoid removal 2 Pickup roller assembly Pickup roller assembly removal 1 Pickup roller assembly removal 2 Paper pickup roller assembly replacement Paper feed frame Paper feed frame removal 1 Paper feed frame removal 2 Paper feed frame removal 3 Transfer roller guide and transfer roller Transfer roller guide and transfer roller removal Kick plate Kick plate removal Kick plate spring replacement Separation pad Separation pad removal Subpads Subpad removal Feed assembly Feed assembly removal 1 Feed assembly removal 2 Feed assembly removal 3 Bottom assemblies Cable guide Main Motor Motor removal ECU ECU removal 2 ECU removal 3 ECU removal 4 Feet Feet removal Troubleshooting Is Power On successful? Basic troubleshootingVerification steps Possible problems Solutions Reports print? Is the product ready?Do engine tests and internal Is the copy function operational? Does the product send a fax? Does the product print from Is the software installed correctly?Does the product receive a fax? Computer? Message Cause Error messagesDecoding Error #number Image processing chip No Modem Installed If neither of these solutions works, replace the formatter Call for Service Damaged Error LaserJet 3100/3150 product Servicing To redistribute toner in the cartridge Image formation troubleshootingCheck the toner cartridge Parts of the page around the edges aren’t printing Solving image quality problemsProblem Cause Images will not Or print is not faded, but vertical white stripes appear on Aligned black Installed Streaks or smears Appear Horizontally Character voids Light characterShadows or Repetitive marks Appear on Solid black Paper Only partially Printed also Completely blackCharacters are Referred to as Dropouts Print is misaligned on the page skewed pages Always printing InstalledBlank pages are Scanned images Scanned text is notClear Print at a reduced Image Size Long pages stop Solving paper feed problemsPages are coming Feeding through Crooked Adjusted properly Scanned items are Paper guides are not adjusted properly Tray fall forward out Solving general software problems Not install a driver Windows will not prompt Software did not install Windows 95, 98, or NT4.0 Not connected to your computer Is securely connected Network Your HP LaserJetAll in One on Find an All in One at To perform the simple hardware test Functional checksSimple hardware test To print an engine test Engine testEngine test button location To run a self-test and print a self-test report To print a configuration reportInternal reports To print a demonstration Printing all reports at once To print all reports at once Half-self test functional check Drum rotation functional check Heating element check High-voltage power supply check Checking the toner cartridge connection points Checking the high-voltage connector assembly Paper curl Paper path check To override SW101 Troubleshooting tools Paper path and components Document path and components Document path and components Repetitive image defect ruler Repetitive image defect ruler Pressing VOLUME+CONTRAST Document scanner recalibration Press once to display Service and press ENTER/MENU Main wiring General circuit diagram 1 General circuit diagram 2 Tests in control panel service mode Service menusControl panel service menu Control panel service menu Extended service menu Extended service menu tree Control panel can Self-test in extended service mode Fax memory test #1 Program test #1 Other tests in extended service mode Extended service mode tests Test Explanation Reports in extended service mode Extended service mode reports Report Explanation Clear memory in extended service mode Softswitches To change the country code softswitch Country/region code softswitch sequences Press Stop/Clear Firmware and software downloads Hardware, software, and firmware compatibility Hardware, software, and firmware compatibility Fax trace report Translating the fax trace report Fax phase sequence Sequence Calling station Called station Commands Comments Appropriate responses Appropriate responses Abbreviation Function Signal format X= any # Fax abbreviations MSG Example of a successfully sent fax Explanation of DBM Example of a successfully received fax Troubleshooting Parts and diagrams How to use the parts lists and diagrams Ordering parts Consumables and accessories Consumables and accessories Product number Description Power cable- Hong Kong SAR Ordering consumables Common hardware Common fasteners ExampleDescription Major assembly locations Supports Supports Reference Part number Description External covers and panels External covers and panels Reference Part number Description Printer door 1 Printer door 1 Reference Part number Description Printer door 2 Printer door 2 Reference Part number Description Document scanner assembly Document scanner assembly Reference Part number Description Internal components 1 Internal components 1 Reference Part number Description Internal components 2 Internal components 2 Reference Part number Description Internal components 3 Internal components 3 Reference Part number Description Electrical components assembly Common hardware Paper pickup assembly Paper pickup assembly Reference Part number Description Feed assembly Feeder assembly Reference Part number Description Separation guide assembly Separation guide assembly Reference Part number Description Delivery assembly Delivery assembly Reference Part number Description Alphabetical parts list Alphabetical parts list Part name Part number Alphabetical parts list Figure # Reference Figure # Reference Figure # Reference Figure # Reference Figure # Reference Numerical parts list Numerical parts list Part number Part name Figure # Reference Paper path lever-LJ 3150 darker in color Figure # Reference Cable, grounding, document scanner motor Figure # Reference Document scanner separation pad replacement When to replace the document scanner separation pad How to replace the document scanner separation pad Document scanner separation pad replacement Index Index Index Index Index Index Index Index Index Index Index Index Index Page Manual Part No. C4256-90954