Internal assemblies, LIU board | HP 3150, 3100 guide

Internal assemblies

LIU board

1Remove the back cover.

2Pull out slightly the connector for the flat, flexible cable (callout 1) to release the cable and disconnect the cable from the LIU board.

Note	The flat, flexible cable must be reinstalled to the same orientation.
	Examine the cable and make notes about its orientation to make sure
	that you reinstall it correctly.
	3 Remove the three (3) screws (callout 2) from the LIU board.
	.

1

2

Figure 35. LIU board removal

4Remove the LIU board by rotating the board up and off the hooks.

EN	Internal assemblies 107

Image 109

HP 3150, 3100 manual Internal assemblies, LIU board

Contents

Page Page HP LaserJet 3100/3150 Product Copyright Information Warranty Contents Functional overview Troubleshooting Parts and diagrams Figures Contents-7 Fuser pressure plate removal 114 Page Page Tables Contents-11Page Product Information Chapter contents Introduction Product features Feature Description Product features Physical specifications Category Specification Product specificationsPerformance specifications Category Specification Operating acoustical emissions per ISO 9296 specifications Power specifications Category SpecificationSkew specifications Model number C3948A Model and serial numbersModel number C4256A Document scanner path Product overview Printer path 1 Printer path 2 Rear view Laser safety statement SafetyRegulatory information Transportation Luokan 1 laserlaite Klass 1 Laser Apparat Laser statement for FinlandVaroitus Varning FCC part 68 requirements FCC regulations RJ11C Telephone consumer protection act U.S IC CS-03 requirements Declaration of conformity Conforms to the following Product Specifications Environmental product stewardship program Canadian DOC regulationsProtecting the environment This HP LaserJet printer design eliminates Ozone production Paper use Toner consumptionHP LaserJet Printing Supplies Paper Spare parts and consumables availability Material safety data sheet Installation and operation Environmental requirements Category Requirement Operating environment Input for document feeder tray for document scanner path Media requirementsOutput capacities Storage conditions Toner cartridge informationStoring opened toner cartridges Toner Recycling Control panel layout Control panel Control panel messages Message Cause Control panel messages From Scanner Clear Document Communication Error Control panel messages Message Cause Solution Config. Tied Addr ConfigurationDecoding Error # Encoding Error Fax Memory Error Lost Power failureFax Document was #number Memory Full Send Modem Error #Unscanned Pages Memory is Full No Memory for When nothing was in memoryReport Erase/Print Paper Bin is Empty Password must bePlease Add Paper Digits Printer Comm Error Polling-In ErrorOr No Cartridge Cartridge is not installed properly Printer Cover Open Call for Service Problem has occurred with the print Engine Printer Laser ErrorPrinter Motor Error Call for Service Engine Redial Failed ErrorRemote Fax was Busy Scan Reference Speed Dial number System ErrorIs not Assigned Memory Had been received to memory To print a menu tree 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 To use a cleaning Using a cleaningPage Functional overview Basic functions Basic configuration Printer functions Printer unit functional block diagram ECU loads ECU/power system Print engine control system AC power distribution Power system on ECUDC power distribution DC power distribution High-voltage power supply circuit High-voltage power distribution Central processing unit Formatter systemMemory Read-only memory ROM Random-access memory RAM Draft modeParallel interface Control panel Toner cartridge Image formation system Scanning exposure Primary chargingDeveloping Transferring Drum cleaningSeparating 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 Timing Period Purpose Remarks Basic sequence of operation formatter-to-printer General timing diagram Removal and replacement Removal and replacement strategy After completing service Before performing serviceRequired tools Back cover Covers Back cover removal 2 To reinstall Right side cover removal Right side cover Left side cover removal Left side cover Left front cover removal Left front cover Top cover removal Top cover RFI shield removal RFI shield Printer door Document scanner assemblies Printer door removal 2 Printer door removal 3 Document release door removal 1 Document release door Document release door removal 2 Upper guide assembly removal 1 Upper guide assembly Upper guide assembly removal 2 Contact image sensor removal 1 Contact image sensor Contact image sensor removal 2 Document scanner assembly/motor removal 1 Document scanner assembly/motor Document scanner assembly/motor removal 2 Document scanner pickup roller removal Document scanner pickup roller LIU board Internal assemblies Formatter board removal 1 Formatter board Formatter board removal 2 Metal side plate removal Metal side plate Exit roller removal Exit roller Delivery assembly removal 1 Delivery assembly Delivery assembly removal 2 Fuser pressure plate removal Fuser pressure plate Fuser pressure plate replacement Front casing removal Front casing Heating element removal 1 Heating element Heating element removal 2 Pressure roller guide removal Pressure roller Able to feel the spring’s release mechanism Face-up/face-down lever Fuser exit roller assembly removal Fuser exit roller assembly Paper exit sensor flag Paper exit sensor flag replacement Laser/scanner assembly removal Laser/scanner assembly Solenoid removal 1 Solenoid Solenoid removal 2 Pickup roller assembly removal 1 Pickup roller assembly Pickup roller assembly removal 2 Paper pickup roller assembly replacement Paper feed frame removal 1 Paper feed frame Paper feed frame removal 2 Paper feed frame removal 3 Transfer roller guide and transfer roller removal Transfer roller guide and transfer roller Kick plate removal Kick plate Kick plate spring replacement Separation pad removal Separation pad Subpad removal Subpads Feed assembly removal 1 Feed assembly Feed assembly removal 2 Feed assembly removal 3 Cable guide Bottom assemblies Motor removal Main Motor ECU ECU removal 2 ECU removal 3 ECU removal 4 Feet removal Feet Troubleshooting Verification steps Possible problems Solutions Basic troubleshootingIs Power On successful? Do engine tests and internal Is the product ready?Reports print? Does the product send a fax? Is the copy function operational? Does the product receive a fax? Is the software installed correctly?Does the product print from Computer? Decoding Error Error messagesMessage Cause #number Image processing chip No Modem Installed If neither of these solutions works, replace the formatter Error LaserJet 3100/3150 product Call for Service Damaged Servicing Check the toner cartridge Image formation troubleshootingTo redistribute toner in the cartridge Problem Cause Solving image quality problemsParts of the page around the edges aren’t printing Images will not Or print is not faded, but vertical white stripes appear on Horizontally Aligned black Installed Streaks or smears Appear Shadows or Repetitive marks Appear on Light characterCharacter voids Solid black Paper Characters are Completely blackOnly partially Printed also Referred to as Dropouts Blank pages are Always printing InstalledPrint is misaligned on the page skewed pages Clear Scanned text is notScanned images Print at a reduced Image Size Pages are coming Solving paper feed problemsLong pages stop Feeding through Scanned items are Crooked Adjusted properly Paper guides are not adjusted properly Tray fall forward out Not install a driver Windows will not prompt Solving general software problems Not connected to your computer Software did not install Windows 95, 98, or NT4.0 Is securely connected All in One on Your HP LaserJetNetwork Find an All in One at Simple hardware test Functional checksTo perform the simple hardware test Engine test button location Engine testTo print an engine test Internal reports To print a configuration reportTo run a self-test and print a self-test report To print a demonstration To print all reports at once Printing all reports at once Half-self test functional check Drum rotation functional check Heating element check Checking the toner cartridge connection points High-voltage power supply check Paper curl Checking the high-voltage connector assembly To override SW101 Paper path check Paper path and components Troubleshooting tools Document path and components Document path and components Repetitive image defect ruler Repetitive image defect ruler Document scanner recalibration Pressing VOLUME+CONTRAST Press once to display Service and press ENTER/MENU General circuit diagram 1 Main wiring General circuit diagram 2 Control panel service menu Service menusTests in control panel service mode Control panel service menu Extended service menu Control panel can Extended service menu tree Fax memory test #1 Program test #1 Self-test in extended service mode Extended service mode tests Test Explanation Other tests in extended service mode Extended service mode reports Report Explanation Reports in extended service mode Clear memory in extended service mode To change the country code softswitch Softswitches Press Stop/Clear Country code softswitch sequences Firmware and software downloads Hardware, software, and firmware compatibility Hardware, software, and firmware compatibility Translating the fax trace report Fax trace report Sequence Calling station Called station Fax phase sequence Appropriate responses Commands Comments Appropriate responses Fax abbreviations Abbreviation Function Signal format X= any # MSG Example of a successfully sent fax Example of a successfully received fax Explanation of DBM Troubleshooting Parts and diagrams Ordering parts How to use the parts lists and diagrams Consumables and accessories Product number Description Consumables and accessories Consumables and accessories Product number Description Ordering consumables Common fasteners ExampleDescription Common hardware 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 Part name Part number Alphabetical parts list Alphabetical parts list Figure # Reference Figure # Reference Figure # Reference Figure # Reference Figure # Reference Numerical parts list Part number Part name Numerical parts list Figure # Reference Paper path lever-LJ 3150 darker in color Figure # Reference Cable, grounding, document scanner motor Figure # Reference When to replace the document scanner separation pad Document scanner separation pad replacement Document scanner separation pad replacement How to replace the document scanner separation pad Index Index Index Index Index Index Index Index Index Index Index Index Index Page C4256-90954