Hp Laserjet 5L Users Manual And 6L Printer Service Manual, C3990 90991

2015-02-09

• Service Manual for the HP LaserJet 5L and HP LaserJet 6L Printers
  • Conventions
  • Chapter Descriptions
  • List of Figures
  • List of Tables
  • 1 Product Information
    • Contents
    • Printer Features 1-3
      • Paper Capacities and Sizes 1-3
    • Identification 1-4
      • Model and Serial 1-4
    • Specifications 1-6
    • Product Overview 1-7
      • Front/Side Views of the Printer 1-7
      • Front Door Assemblies 1-8
      • Back View of the Printer 1-9
    • Service Approach 1-10
      • Parts Exchange Program 1-10
      • Ordering Parts 1-10
      • Ordering Consumables 1-10
      • Ordering Related Documentation 1-10
    • Technical Assistance 1-12
    • Worldwide Support 1-13
      • North American Response Center 1-13
    • Warranty 1-14
      • Warranty Exclusions 1-14
      • Warranty Limitations 1-15
      • Voltage Conversions 1-15
  • 2 Site Requirements
    • Contents
    • Site Requirements 2-3
      • Operating Environment 2-3
    • Printer Space Requirements 2-4
    • The HP C3906A/F Toner Cartridge 2-5
      • Storage Conditions 2-5
      • Storing Opened Toner Cartridges 2-5
      • Toner Cartridge Handling Suggestions 2-6
  • 3 Operating Overview
    • Contents
    • Using the Control Panel 3-3
      • Control Panel Layout 3-3
      • LED Lights 3-4
      • The Front Panel Button 3-6
    • Printing a Self-Test Page 3-7
      • Continuous Self Test 3-9
    • Printing an Engine Test 3-10
    • Resetting the Printer 3-11
      • To Reset the Printer 3-11
  • 4 Printer Maintenance
    • Contents
    • Life Expectancy of Consumables 4-3
    • Toner Cartridge Life 4-4
      • Saving Toner with EconoMode 4-4
      • Refilled Toner Cartridges 4-5
      • Recycling Toner Cartridges 4-5
    • Cleaning the Printer 4-6
      • Cleaning Printer Components 4-7
      • Cleaning Spilled Toner 4-8
  • 5 Functional Overview
    • Contents
    • Basic Printer Functions 5-3
    • DC Controller/Power System 5-4
      • Print Engine Control System 5-5
      • Power System (on DC Controller PCA) 5-6
    • Formatter System 5-8
      • CPU 5-8
      • Read Only Memory (ROM) 5-8
      • Random Access Memory (RAM) 5-8
      • Parallel Interface 5-8
      • Control Panel 5-9
      • Resolution Enhancement (REt) 5-9
      • EconoMode 5-10
      • Memory Enhancement technology (MEt) 5-10
      • Enhanced I/O 5-11
      • Page Protect 5-11
      • PJL Overview 5-11
    • Image Formation System 5-12
      • Toner Cartridge 5-13
      • Step 1: Drum Cleaning 5-13
      • Step 2: Drum Conditioning 5-13
      • Step 3: Image Writing 5-13
      • Step 4: Image Developing 5-14
      • Step 5: Image Transferring 5-14
      • Step 6: Image Fusing 5-14
    • Paper Feed System 5-15
      • Paper Jam Detection 5-18
    • Basic Sequence of Operation 5-19
  • 6 Removal and Replacement
    • Contents
    • Removal and Replacement Strategy 6-3
    • Required Tools 6-4
    • Installing Memory Cards (DRAM) 6-5
    • Covers and Doors 6-6
      • Back Cover 6-6
      • EP Door Assembly 6-8
      • Memory Door 6-9
      • Main Cover and Paper Input Assembly 6-10
    • Internal Assemblies 6-11
      • Control Panel 6-11
      • Exit Roller Assembly 6-12
      • Delivery Assembly 6-13
      • Fuser Pressure Plate 6-15
      • Heating Element 6-17
      • Pressure Roller 6-20
      • Face-Up/Face-Down Lever 6-21
      • Fuser Exit Roller Assembly 6-22
      • Paper Exit Sensor Flag 6-23
    • Top Assemblies 6-24
      • Laser/Scanner Assembly 6-24
      • Solenoid 6-25
      • Pickup Roller Assembly 6-27
      • Paper Feed Frame 6-30
      • Transfer Roller Guide & Transfer Roller 6-34
      • Kick Plate 6-35
      • Separation Pad 6-37
      • Subpads 6-38
      • Feed Assembly 6-39
    • Bottom Assemblies 6-42
      • Memory Door Guide 6-42
      • Motor 6-43
      • DC Controller 6-44
      • Formatter Board 6-47
  • 7 Troubleshooting
    • Contents
    • General Troubleshooting Flowchart 7-3
    • Paper Path and Components 7-5
    • DC Controller Diagram 7-6
    • Printer Error Troubleshooting 7-7
      • Priority of Errors 7-7
      • Printer Status Messages 7-8
      • Service and Error Messages 7-10
    • Image Formation Troubleshooting 7-13
      • Check the Toner Cartridge 7-13
      • Image Defect Examples 7-14
    • Troubleshooting Checks 7-21
      • Engine Test 7-21
      • Half-Self Test Functional Check 7-22
      • Drum Rotation Functional Check 7-23
      • High-Voltage Power Supply Check 7-24
      • Paper Curl 7-26
    • Troubleshooting Tools 7-27
      • Paper Path Check 7-27
      • Repetitive Image Defect Ruler 7-28
      • Main Wiring Diagram 7-29
  • 8 Parts and Diagrams
    • Contents
    • How to Use the Part Lists and Diagrams 8-3
      • Ordering Parts 8-3
      • Ordering Consumables 8-4
    • Accessories and Supplies 8-5
    • Common Hardware 8-6
  • A Parts Index
    • Parts Index
  • B Regulatory Information
    • Laser Safety (U.S.A.)
    • Laser Statement (Finland)
    • Toner Safety
    • Ozone Emission
    • FCC Statement (Class B)
    • VCCI Statement (Japan)
  • C Service Notes
    • Fuser Accordian Jams
    • Fuser Jam Clearing Countermeasure
• Index
  • A
    • AC power distribution 5-6
      • circuitry 5-6
    • accessories and supplies 8-5
    • acoustic emissions 1-6
    • assistance, technical 1-12
  • B
    • background scatter 7-16
    • black page 7-16
    • blank page
      • all pages 7-18
      • occasional 7-18
    • bottom assemblies
      • DC Controller 6-44
      • formatter PCA 6-47
      • memory door guide 6-42
      • motor 6-43
  • C
    • cable pinouts 7-30
    • cables
      • replaceable 8-6
    • capacities: output tray 1-3
    • caution messages 6-3
    • CDRH B-1
    • Center for Devices and Radiological Health (CDRH) B-1
    • Health (CDRH) B-1
    • character voids 7-16
    • circuit protection 5-6
    • class 1 laser product B-1
    • class B digital device B-4
    • cleaning
      • printer 4-6
      • spilled toner 4-8
    • clutches and sensors 5-17
    • common hardware 8-6
    • consumables
      • ordering 8-4
      • printer 1-10
    • control panel 1-3
      • described 5-9
      • features 1-3, 3-3
      • layout 3-3
      • messages 7-8
      • self test for printer errors 7-8
      • settings 5-9
      • using 3-3
    • covers 8-7
    • covers and doors 8-8
      • back cover 6-6
      • EP Door 6-8
      • main cover and paper input assembly 6-10
      • 6-10
      • memory door 6-9
    • CPU 5-8
    • CPU, printer 5-8
  • D
    • data light 3-3
    • DC Controller 8-16
      • diagram 7-6
    • DC Controller system 5-5
    • DC power distribution
      • circuitry 5-6
      • explained 5-6
    • defect ruler, repetitive image 7-28
    • delivery assembly 8-24
    • Department of Health and Human Services (DHHS) B-1
    • DHHS B-1
    • diagrams 8-3
    • dimensions, printer 1-3, 1-6, 2-4
    • distribution system
      • AC 5-6
    • documentation
      • related 1-10 to 1-11
    • doors 8-7
    • DRAM
      • installation 6-5
    • dropouts 7-17
    • drum
      • photosensitive 5-13, 7-13, 7-22 to 7-23
    • drum cleaning process
      • described 5-12 to 5-13
    • drum conditioning
      • described 5-12 to 5-13
    • drum rotation functional check 7-23
  • E
    • EconoMode 1-3, 5-10
      • print speed 5-10
      • vs. normal mode 5-10
    • electrical specifications 1-6
    • emissions
      • acoustic 1-6
    • engine test 3-10, 7-21
      • printing 7-21
    • engine test button location 7-21
    • engine test microswitch, SW201 5-5
    • environment
      • operating 2-3
    • environmental requirements 2-5
    • error light 3-3
      • unclearable 7-9
    • exchange program 1-10
  • F
    • faded print 7-14
    • faulty image examples 7-14
    • FCC statement B-4
    • features
      • control panel 1-3, 3-3
    • feed assembly 8-20
    • Finland laser statement B-2
    • fonts
      • downloaded 5-6
      • internal 1-3
      • internal character sets 5-8
      • storing 5-8
    • fonts, internal 1-3
    • form feed light 3-4 to 3-5
    • formatter PCA 8-16
      • Motorala 68030 microprocessor 5-8
      • Bi-tronics interface 5-8
      • DC controller PCA 5-19
      • described 5-8
      • engine test print 3-10
      • HVPS PCA 5-7
      • REt 5-9
      • self test bypass 5-5
      • voltages 5-6
    • formatter PCA 5-8
    • formatter system
      • described 5-8
    • front door components 8-10, 8-12
    • Front Panel Button, described 5-7
    • functional overview 5-1 to 5-22
    • functions, basic printer 5-3
    • fusing process 5-14
  • H
    • half page blank 7-17
    • half self test check
      • purpose 7-22
    • half self test functional check 7-22
    • hardware, common 8-6
    • high voltage power distribution 5-7
    • high voltage power supply PCA 5-7
    • high-voltage power supply check 7-24
    • horizontal stripes 7-15
    • HPD, HP™s Distribution Center 1-11
  • I
    • identification, labels 1-4
    • identification, printer 1-4
    • image defects 7-28
    • image developing 5-12, 5-14
    • image formation system
      • block diagram 5-12
      • DC controller 5-8
      • described 5-12
      • features 5-12
      • toner cartridge 5-13, 7-13
    • image formation troubleshooting 7-13
    • image fusing 5-12, 5-14
    • image transferring 5-12, 5-14
    • image writing 5-12 to 5-13
    • installation
      • DRAM 6-5
    • installing
      • memory cards 6-5
    • interfaces
      • standard 1-3
    • internal assemblies 8-10, 8-12, 8-14
      • control panel 6-11
      • delivery assembly 6-13
      • exit roller assembly 6-12
      • face-up/face-down lever 6-21
      • fuser exit roller 6-22
      • fuser pressure plate 6-15
      • heating element 6-17
      • pressure roller 6-20
    • internal typefaces 1-3
    • INTR, printer timing 5-19
  • J
    • Japanese VCCI Statement B-4
  • L
    • laser and scanner drive 5-5
    • laser drive 5-5
    • laser safety information B-1
    • Laser Safety, USA B-1
    • laser statement, Finland B-2
    • loss of detail 7-17
    • LSTR, printer timing 5-19
  • M
    • main wiring diagram 7-29
    • maintenance 4-1 to 4-8
    • Material Safety Data Sheet, MSDS B-3
    • memory
      • buffer 5-11
      • MEt 1-3, 5-10
      • printer 1-3, 5-8, 5-10
      • RAM 5-8
      • ROM 5-8
      • upgrades 8-5
    • memory cards (DRAM)
      • installation 6-5
    • memory enhancement technology 5-10
      • described 5-10
    • MEt 5-10
    • microswitch
      • SW101 5-5
      • SW201 5-5
    • model number 1-4
    • model, printer 8-3
    • motor
      • described 5-5
    • MSDS B-3
  • N
    • North American Response 1-13
  • O
    • operating environment 2-3
    • operation, basic sequence 5-19
    • ordering
      • related 1-10
    • ordering consumables 8-4
    • ordering parts 1-10, 8-3
    • output components 8-14
    • overcurrent
      • dc protection circuitry 5-6
      • devices 5-6
      • protection 5-6
    • overvoltage
      • devices 5-6
      • protection 5-6
    • ozone emission B-3
  • P
    • page protect
      • described 5-11
      • disabled 5-11
      • page buffer 5-11
      • PCL printing 5-11
    • page usage, monthly 1-3
    • paper capacities 1-3
    • paper curl 7-26
    • paper feed system
      • clutches and sensors 5-17
      • described 5-15
      • paper path 5-16, 7-5
    • paper jam
      • DC controller 5-18
      • messages 7-7
      • toner 4-8
    • paper jam detection
      • described 5-18
    • paper motion, control 5-5
    • paper motion, monitoring 5-5
    • paper path
      • components 7-5
      • location 5-16
      • troubleshooting 7-27
    • paper sensors 5-5
    • parallel interface
      • described 5-8
    • parts
      • HPD 1-11
      • ordering 1-10, 8-3
      • Parts Direct Ordering 8-3
      • PDO, Parts Direct Ordering 1-11, 8-3
      • phone numbers 8-4
      • SME, Support Materials Europe 1-11
    • Parts 1-10
    • parts and diagrams 8-1 to 8-26
    • Parts Direct Ordering 8-3
    • parts lists 8-3
    • PDO, Parts Direct Ordering 1-11, 8-3
    • phone numbers, parts 8-4
    • photosensitive drum 5-13
      • check list 7-22
      • damage 7-13
      • described 5-13
      • located 7-23
    • photosensitive drum cleaning 5-12 to 5-13
    • photosensitive drum conditioning 5-12 to 5-13
    • pickup roller assembly 8-18
    • PJL overview 5-11
    • PJL, Printer Display Language
      • Centronics cabeling 5-11
      • described 5-11
      • print environment settings 5-11
      • two-way communication 5-11
    • power
      • surge 1-15
    • power control 1-3
    • power distribution, AC 5-6
    • power save mode 1-3, 5-6
    • power supply system 5-4
    • preliminary troubleshooting 7-3
    • print environment settings, PJL 5-11
    • print quality
      • cleaning printer 4-6
      • transfer roller 4-7
    • print quality problems 7-14
      • all blank pages 7-18
      • background scatter 7-16
      • black page 7-16
      • blank page 7-18
      • character voids 7-16
      • dropouts 7-17
      • faded print 7-14
      • half blank page 7-17
      • horizontal stripes 7-15
      • loss of detail 7-17
      • repetitive defects 7-15
      • staining 7-14
      • vertical lines 7-15
      • vertical white stripes 7-15
    • print resolution 1-3
    • print speed 1-3, 5-8, 5-10
    • printer
      • buffer memory 5-11
      • cleaning 4-6
      • fonts 1-3
      • memory 1-3, 5-8, 5-10
      • memory upgrade 8-5
      • MEt 5-10
      • model number 1-4
      • optional memory 1-3
      • reset 3-11
      • standard memory 1-3
      • warranty 1-14
      • warranty 1-15
      • warranty exclusions 1-14
    • printer comparison
      • memory 1-3
    • printer dimensions 1-3, 1-6, 2-4
    • printer features 1-3
      • internal typefaces 1-3
      • memory 1-3
      • monthly usage 1-3
      • speed 1-3
    • printer functions, basic 5-3
    • printer job language, PJL 5-11
    • printer message troubleshooting 7-7
    • printer messages
      • control panel 7-8
      • error 7-8
      • manual feed 7-7
      • memory error 7-7
      • paper out 7-7
      • Ready 7-8
      • self test 7-8
      • status 7-8
      • toner cartridge 7-7
      • troubleshooting 7-7
    • printer space requirements 2-4
    • printer timing 5-19
      • INTR 5-19
      • LSTR 5-19
      • PRNT 5-19
      • STBY 5-19
      • WAIT 5-19
    • printing
      • self test page 3-7
    • priority of errors 7-7
    • PRNT, printer timing 5-19
    • product information 1-1 to 1-16, 3-1 to 3-12
    • product overview 1-7
  • R
    • radio frequency interference, RFI B-4
    • RAM 5-8
      • described 5-8
    • random access memory
      • described 5-8
    • read only memory
      • described 5-8
    • ready light 3-3
    • regulatory information B-1 to B-4
    • related documentation 1-10 to 1-11
    • remanufactured assemblies 1-10
    • removal and replacement
      • back cover 6-6
      • bottom assemblies 6-42
      • conductive grease 6-20
      • control panel 6-11
      • covers and doors 6-6
      • DC Controller 6-44
      • delivery assembly 6-13
      • EP Door 6-8
      • exit roller assembly 6-12
      • face-up/face-down lever 6-21
      • feed assembly 6-39
      • formatter pca 6-47
      • fuser exit roller 6-22
      • fuser pressure plate 6-15
      • heating element 6-17
      • internal assemblies 6-11
      • kick plate 6-35
      • laser/scanner assembly 6-24
      • main cover and paper input assembly 6-10
      • memory door 6-9
      • memory door guide 6-42
      • motor 6-43
      • paper exit sensor flag 6-23
      • paper feed frame 6-30
      • pickup roller assembly 6-27
      • pressure roller 6-20
      • separation pad 6-37
      • solenoid 6-25
      • strategy 6-3
      • subpads 6-38
      • top assemblies 6-24
      • transfer roller 6-34
    • repair philosophy 1-10
    • repetitive defects 7-15
    • repetitive image defect ruler 7-28
    • replaceable cables 8-6
    • required tools 6-4
    • requirements
      • environmental 2-5
      • site 2-1 to 2-6
      • space 2-4
    • resetting the printer 3-11
    • Resolution Enhancement technology 1-3, 5-9
      • described 5-9
    • resolution, print 1-3
    • REt, Resolution Enhancement technology 1-3, 5-9
    • ROM 5-8
      • character sets 5-8
      • dot patterns 5-8
  • S
    • safety
      • toner B-3
    • scanner drive 5-5
    • self test
      • engine 3-10
      • microswitch SW201 5-5
    • self test page 3-7
    • sensors 5-17
    • separation guide assembly 8-22
    • sequence of operation 5-19
    • serial number
      • information 1-4
    • service approach 1-10
    • service errors 7-7
    • service or error messages
      • beam error 7-11
      • engine 7-11
      • firmware 7-12
      • formatter 7-12
      • fuser 7-10
      • ROM or RAM 7-10
      • scanner 7-12
    • site requirements 2-1 to 2-6
    • SME, Support Materials Europe 1-11
    • solving
      • print quality problems 7-14
    • space requirements 2-4
    • specifications
      • electrical 1-6
      • paper 1-11
      • printer 1-6, 2-3
    • staining 7-14
    • standard interfaces 1-3
    • standard printer memory 1-3
    • status messages
      • door open or no EP cartridge 7-8
      • incompatible memory card 7-8
      • manual feed 7-8
      • memory error 7-8
      • paper jam 7-8
      • paper out 7-8
      • Ready 7-8
      • SleepMode 7-9
    • STBY, printer timing 5-19
    • supplies 8-5
      • See also accessories and supplies
    • surge protection 1-15
    • SW101, 12 volt dc power shutoff microswitch 5-5
    • SW101, printer door microswitch 5-5
    • SW201, engine test microswitch 5-5
  • T
    • technical assistance 1-12
    • test, engine 3-10
    • toner 1-10
    • toner cartridge
      • charging rollers B-3
      • check list 7-13
      • cleaning spills 4-8
      • defective 4-8
      • described 5-13
      • drum cleaning 5-12 to 5-13
      • drum conditioning 5-12 to 5-13
      • drum rotation check 7-23
      • faulty image exampes 7-14
      • image formation 7-13
      • image formation system 5-13
      • MSDS B-3
      • photosensitive drum 5-13, 7-13, 7-22 to 7-23
      • printer message 7-7
      • refilled 7-23
      • replacement 8-5
      • weight 7-13
    • toner cartridge microswitch, SW101 5-5
    • toner safety B-3
    • tools
      • required 6-4
    • top assemblies
      • feed assembly 6-39
      • kick plate 6-35
      • laser/scanner assembly 6-24
      • paper feed frame 6-30
      • pickup roller assembly 6-27
      • separation pad 6-37
      • solenoid 6-25
      • transfer roller 6-34
    • transferring process 5-14
    • troubleshooting 7-1 to 7-32
      • drum rotation 7-23
      • high-voltage power supply check 7-24
      • image defects 7-28
      • image formation 7-13
      • LEDs 7-7
      • paper curl 7-26
      • paper path 7-27
      • print quality problems 7-14
      • printer errors 7-7
    • troubleshooting checks 7-21
    • troubleshooting flowchart 7-3
    • troubleshooting tools 7-27
    • troubleshooting, preliminary 7-3
    • two-way communication, PJL 5-11
    • typefaces
      • internal 1-3
  • V
    • VCCI Statement, Japan B-4
    • vertical lines 7-15
    • vertical white stripes 7-15
    • voltage conversions 1-15
  • W
    • WAIT, printer timing 5-19
    • warning messages 6-3
    • warranty
      • exclusions 1-14
      • limitations 1-15
      • start date 1-15
      • voltage 1-15
    • warranty 1-14
    • wiring diagram 7-29
    • wiring diagrams, main 7-29
    • writing process 5-13