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Combined Service Manual
Back to Welcome
HP DOC
HP LaserJet 4L/ 4ML (C2003A/ C2015A) HP LaserJet 4P/ 4MP (C2005A/ C2040A)
Copyright HewlettPackard Company 1993
Warranty The information contained in this document is subject to change without nc,tice. Hewlett-Packard makes no warranty of any kind with regard to this material, including, but not limited to, the implied warranties or merchantability and fitness for a particular purpose. Hewlett-Packard shall not be liable for errors cmtained herein or for incidental or consequential damaged in connecti~m with the furnishing, performance, or use of this material.
WARNING
Electrical
Shock Hazard
All Rights Reserved. Reproduction, adaptation, or ranslation without prior written pmnnssionis prohibited, except as allowed under the copyright laws.
To avoid electrical shock, use only supplied power cords and connect only to properly grounded (3-hole) wall outlets.
Publication number C2005-90988
First edition, August 1993
Second edition, March 1994
Printed in USA
Hewlett-Packard Company 1311 Chinden Boulevard Boise, Idaho 83714
Conventions
This manual uses the following conventions: Unless specifically stated otherwise, information applies to all four printer models (LaserJet 4L/4ML/4P/4MP), Most procedures are combined for all printers, except where they differ substantially. Color is used to emphasize under discussion. items which are important to the material
The names of major printer parts and assemblies Bold is used for emphasis, would be confusing. particularly
are Capitalized. where italic type
in situations
Italic type is used to indicate related documents
or emphasis.
COME'UTER type indicates text as seen on a computer monitor. Di ;W.-ii'+type indicates text as seen on the printer's display panel (LaserJet 4P/4MP only). 16 character LCD
~ indicates keys on a computer keyboard or on the printer's control panel (LaserJet 4P/4MP only). Examples include ~ and m.
,"
Notes contain important the text.
information
set off from
i,, 21.JII[, !'J
Caution messages alert you to the possibility damage to equipment or loss of data.
of
WARNING!
Warning messages personal injury.
alert you to the possibility
of
A detailed matrix of printer features is followed by general information on the four printer models. Specifications, major assembly locations, safety and regulatory information are all included. The chapter ends with a discussion of the service and repair philosophy along with useful information on obtaining technical help.
Recommendations pertaining to the physical location of the printer and consumables are followed by general print media specifications (including specifications for paper, envelopes, labels and transparencies).
Chapter 3 provides the step-by-step installation and setup procedure, along with detailed information on using the Control Panel for each printer model. Sample self tests and printer reset information are also included.
Turn to this chapter for information on routine printer maintenance, including consumables and printer cleaning procedures. Paper jam procedures are also included.
Here you will find the basic theory-of-operation information required to understand the various printer systems and how they function together.
This chapter contains the step-by-step procedures for replacing all the printer's field replaceable units (FRUS). Assemblies are grouped by physical location in the printer.
...
Turn to Chapter 7 for diagnosing and troubleshooting printer problems. Start with the general troubleshooting flowchart, referencing the paper path and printer component location diagrams for assistance. Error message tables and image defect samples are followed by engine test and other diagnostic procedures. The chapter ends with more troubleshooting tools such as an image defect ruler and wiring diagram.
I-Jse Chapter 8 to find any field replaceable unit (FRU) in the printers. Exploded view drawings are accompanied by complete part number and description tables.
The parts index is a convenient tool for looking up any field replaceable unit (FRU). All parts are sorted both by part number and by part name. Parts are cross-referenced to their corresponding exploded view illustrations in Chapter 8.
This appendix contains cabling and pin-out information the serial, parallel and LocalTalk interfaces which are supported by the printers.
for
lJse the subject index to quickly locate any information manual.
in the
Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig
l-l I-2 I-3 I-4 I-5 I-6 2-1 2-2 3-1 3-2 3-3 3-4 3-5 3-6 3-7 3-8 4-1 4-2 4-3 4-4 4-5 4-6 4-7 5-1 5-2 5-3 !i-4 5-5 5-6 5-7 5-8 5-9 5-10 5-11 5-12 5-13 5-14 5-15 5-16 5-17 5-18 5-19
Sample Model and Serial Number Labels 1-3 External Assembly Locations (LaserJet 4L/4ML) -1-6 External Assembly Locations (LaserJet 4P/4MP) -1-7 Internal Assembly Locations (all printers) 1-8 LaserJet 4L Internal Assembly Locations 1-9 LaserJet 4P Internal Assembly Locations 1-10 Printer Space Requirements 2-3 Distributing Toner 2-6 Attaching the Help Labe"ls (LaserJet 4L/4ML) 3-6 LaserJet 4L/4ML Front Control Panel 3-9 LaserJet 4P/4MP Front (;ontrol Panel 3-12 LaserJet 4P/4MP Menu Map 3-14 Service Mode Menu Map (LaserJet 4ML/4P/4MP) -3-16 LaserJet 4L Self Test Page 3-20 LaserJet 4MP Service Mt]de Self Test Page 3-22 Engine Test Button and Printout (LaserJet 4L) 3-25 Service Checkpoints 4-2 Sample 5% Page Coverage 4-4 Paper Feed Area Jam 4-9 Clearing Jams from the Toner Cartridge Area 4-10 Clearing Jams from the l'aper Guide 4-10 Releasing Paper from the Fusing Assembly 4-11 Clearing Jams from the Fuser Area 4-12 Printer Functional Block Diagram 5-2 DC Controller Loads 5-3 Top Cover/Toner Cartridge Plunger 5-6 Power Supply Block Diagram 5-9 High Voltage Power Timing 5-11 Formatter Block Diagram 5-12 EconoMode vs. Regular F'rint 5-18 Image Formation Block Diagram 5-22 Photosensitive Drum 5-23 Drum Surface Potential --5-24 Drum Cleaning 5-25 Primary Charging Roller 5-26 Image Writing 5-27 Image Development 5-29 Developing Potentials 5-30 Transferring Stage 5-3:1 Fusing Film and Pressure Roller 5-32 Printer Paper Path 5-34 Oblique Roller Paper Alignment 5-37
Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig
6-1 6-2 6-3 6-4 6-5 6-6 6-7 6-8 6-9 6-10 6-11 6-12 6-13 6-14 6-15 6-16 6-17 6-18 6-19 6-20 6-21 6-22 6-23 6-24 6-25 6-26 6-27 6-28 6-29 6-30 6-31 6-32 6-33 6-34 6-35 6-36 6-37 6-38 6-39 6-40 6-41 6-42 6-43 6-44 6-45 6-46 6-47 6-48 6-49
Phillips vs. Posidriv Screwdrivers 6-3 Memory Module (LaserJet 4L) 6-4 SIMM Access Panel (LaserJet 4P/4MP) 6-5 Power Access Door (LaserJet 4L/4ML) 6-6 Printer Cover Screws (Laser,Jet 4L/4ML) 6-7 Releasing the Printer Cover Rear Tabs 6-8 Control Panel Connector (LaserJet 4P/4MP) 6-9 Printer Cover Screws (Laser, Jet 4P/4MP) 6-10 Cover (LaserJet 4P/4MP) 6-11 Rear Door 6-12 Control Panel Assembly (LaserJet 4P/4MP) -6-13 Control Panel RFI Shield (LaserJet 4P/4MP) -6-14 Formatter Shield and PCA 6-15 DC Controller Connector& Switch Actuator 6-16 Gear Train Assembly 6-17 Screw Tightening Sequence Example 6-18 Main Motor 6-19 Oblique Roller Assembly 6-20 Tray Forms Size Guide 6-21 Paper Cassette Assemblies 6-22 Laser/Scanner Assembly 6-23 Fan 6-24 Power Switch Assembly (LaserJet 4P/4MP) 6-25 Paper Guide/Roller Assembly 6-26 Transfer Roller -6-27 Beam-to-Drum Mirror 6-29 Fusing Assembly 6-30 Fusing Pressure Plate 6-31 Upper Fusing Assembly 6-32 Fuser Delivery Assembly 6-33 Lower Delivery Roller 6-34 Lower Delivery Guide and Exit Sensor Flag 6-35 Fuser Connector Assembly 6-36 Upper Output Roller Assembly 6-37 Lower Output Rollers 6-38 DC Controller Assembly 6-40 Pickup Feed Roller Solenoid 6-41 Machine Screw Locations (DC Controller PCA) 6-43 Metal Backing Plate 6-44 DC Controller PCA 6-45 D-Roller 6-46 Pickup Feed Roller Assembly (side view) 6-47 Pickup Feed Roller Assembly (bottom view) 6-48 Feeder Guide Assembly 6-49 Small Media Roller Assembly 6-50 Static Eliminator Strip 6-51 Toner Cartridge Lever Assembly 6-52 Top Cover Switch {Plunger Assembly) -6-53 Releasing the Side Tabs 6-.54
Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig Fig
6-50 6-51 7-1 7-2 7-3 7-4 7-5 7-6 7-7 7-8 7-9 7-10 8-1 8-2 8-3 8-4 8-5 8-6 8-7 8-8 8-9 8-10 8-11 8-12 8-13 B-1 B-2 B-3 B-4 B-5
DC Controller/Scanner Connector Location 6-55 Input Paper Sensor Arm -6-56 Paper Path and Components 7-4 DC Controller PCA Components 7-5 Top Door/T'oner Cartridge Plunger Assembly 7-9 Engine Test Button and Printout (LJet 4L/4ML) -7-36 Defeating the Top Door Plunger (LJet 4P/4MP) 7-37 Defeating the Exit Sensor Flag (LaserJet 4P/4MP) 7-38 Leading Edge Adjustment 7-43 Beam -to-Dru]m Mirror Adjustment 7-45 Repetitive Image Defect Ruler 7-46 Main Wiring Diagram 7-47 Assembly Locations 8-7 Covers and Doors (LaserJet 4L/4ML) 8-8 Covers and Doors (LaserJet 4P/4MP) 8-10 Internal Components 1 8-12 Internal Components 2 8-14 Internal Components 3 8-16 DC Controller Assembly 8-18 Gear Train Plate Assembly 8-20 Paper Cassette (LaserJet 4L/4ML) 8-21 Paper Cassette (LaserJet 4P/4MP) 8-22 Pickup Assemb] y 8-23 Fuser Assembly 8-24 Keyboard Overlay (LaserJet 4P/4MP) 8-26 Parallel Cable Pin Assignments B-2 Serial Pin-outs DB-25 to DB-9 B-3 Serial Pin-outs DB-9 to DB-9 B-3 Connecting to END of a LocalTalk Network B-4 Connecting to MIDDLE of a LocalTalk Network B-5
Tbl Tbl Tbl Tbl Tbl Tbl Tbl Tbl Tbl Tbl Tbl Tbl Tbl Tbl Tbl Tbl Tbl Tbl Tbl Tbl Tbl Tbl Tbl Tbl Tbl Tbl Tbl Tbl Tbl Tbl Tbl Tbl Tbl Tbl Tbl Tbl Tbl Tbl Tbl Tbl Tbl Tbl Tbl . .
1-1 1-2 1-3 1-4 1-5 2-1 2-2 2-3 2-4 2-5 2-6 2-7 2-8 3-1 3-2 4-1 4-2 5-1 5-2 5-3 7-1 7-2 7-3 7-4 7-5 `7-6 7-7 `7-8 7-9 7-10 7-11 7-12 `7-13 7-14 7-15 7-16 7-17 7-18 7-19 7-20 7-21 7-22 7-23
Printer Dimensions 1-4 Performance Specifications -1-4 Environmental Specifications 1-5 Electrical Specifications 1-5 Related Documentation 1-19 Current Requirements (Amps) 2-2 Printer Operating Dimensions 2-3 Toner Cartridge Environmental Conditions Supported Media Sizes 2-!3 Selected Paper Specifications 2-11 Envelope Speciilcations212 Adhesive Label Specifications 2-14 Transparency Specifications 2-15 Front Panel Button Usage --3-11 Menu of Resets (LaserJet 4"P/4MP) 3-27 Life Expectancy of Consumi~bles 4-3 Cleaning Printer Components 4-6 Solenoids 5-35 Photosensors 5-35 Print Period Descriptions 5-40 Paper Out Error -7-7 Paper Jam Error 7-8 Door Open Error 7-9 Memory Error 7-10 Manual Feed 7-10 Service Error -7-11 Fuser Error --7-12 Fuser Checks 7-12 Beam Error 7-13 Scanner Error --7-13 WROM Error 7-14 Engine Error 7-15 Main Motor Error 7-15 Fan Error 7-16 Formatter Error 7-16 NVRAM Error 7-17 Blank Display 7-17 Blank (White) Page 7-24 Black Page -7-25 Faded Print -7-26 Vertical White Stripes 7-27 Vertical Black I.ines 7-28 Horizontal Black Lines 7-28
2-4
Tbl 7-24 Tbl 7-25 Tb"l 7-26 Tbl 7-27 Tbl 7-28 Tbl 7-29 Tbl 7-30 Tbl 7-31 Tbl 7-32 Tbl 7-33 Tbl 7-34 Tbl 7-35 Tbl 8-1 Tbl 8-2 Tbl 8-3 Tbl 8-4 Tbl 8-5 Tbl 8-6 Tbl 8-7 Tbl 8-8 Tbl 8-9 Tb[ 8-10 Tb~ 8-11 Tbl 8-12 Tb\ 8-13
Repetitive Defects 7-29 Staining -7-30 Dropout 7-31 Character Voids 7-31 Background Scatter 7-32 Bottom Portion of Page Blank 7-32 Faulty Registration 7-33 Smeared Print 7-34 Image Skew 7-35 Compressed Print 7-35 High-Voltage System Checks 7-41 Causes of Paper Curl 7-42 Fasteners IJsed in the Printer 8-4 Covers and Doors (LaserJet 4L/4ML only) 8-9 Covers and Doors (LaserJet 4P/4MP only) 8-11 Internal Components 1 8-13 Internal Components 2 8-15 Internal Components 3 8-17 DC Controller Assembly 8-19 Gear Train Plate Assembly 8-20 Paper Cassette (LaserJet 4L/4ML) -8-21 Paper Cassette (LaserJet 4P/4MP) -8-22 Pickup Assembly 8-23 Fuser Assembly -8-25 Keyboard Overlays (Laser,Jet 4P/4MP) 8-26
x
Chapter Contents
Product
Information
Printer Features 1-2 Identification 1-3 Model and Serial Numbers 1-3 Specifications 1-4 Product Overview 1-6 External Assembly Locations (LaserJet 4L/4ML) 1-6 External Assembly Locations (LaserJet 4P/4MP) 1-7 Internal Assembly Locations 1-8 Safety Information 1-11 Laser Safety 1-11 Laser Statement (Finland) 1-12 Declaration of Conformity 1-13 Toner Safety 1-14 MSDS Information 1-14 By mail: 1-14 By fax: 1-14 Ozone Emission 1-14 FCC Statement VCCI Statement (Class B) 1-15 (Japan) 1-16
Service Approach 1-17 Exchange Program 1-17 Ordering Parts 1-17 Ordering Consumables 1-17 Ordering Related Documentation 1-18 Print Utilities 1-19 Technical Assistance 1-20 HP ASAP 1-800-333-1917 (U.S.) 1-20 HP FIRST -1-20 HP FIRST, U.S. 1-20 HP FIRST, Europe 1-20 HP AUDIO-TIPS 1-21 HP CompuServe Forum 1-21 Customer Information Centers 1-21 Customer Support Center (Assist Line) 1-21 European Customer Support Center 1-22 Other Areas 1-22 `
Chapter 1
Contents Page 1
CI!-mpttwcamtemrts
2 Q@a=ating
Rmq@7mflmmfx
o
Site Requirements 2-2 Operating Environment 2-2 Printer Space Requirements 2-3 The HP 92274A Toner Cartridge 2-4 Storage Conditions 2-4 Storing Opened Toner Cartridges 2-5 Toner Cartridge Handling Suggestions 2-6 Refilled Toner Cartridges 2-7 Recycling Toner Cartridges 2-7 Media Specifications 2-8 Media Sizes Supported 2-9 Media Selection Guidelines 2-10 Envelope Specifications 2-12 Adhesive Label Specifications 2-13 Transparency Specifications 2-15 Storing Print Media 2-16 Shipping Print Media 2-16
q
Chapter 2
Contents Page 1
0&@x5w' Q3mr&?mts
hs'tdktimoi
and Cmfigmlmtilm
Unpacking and Installation 3-2 A. Choose the best location. 3-2 B. Unpack the printer. 3-2 C. Check package contents. 3-3 D. Install the toner cartridge. 3-3 E. Load the paper cassette. 3-4 F. Attach the interface cable(s). 3-4 G. Attach the power cord. 3-5 H. Attach the Help Labels (Lase'Jet 4L/4ML only) 3-6 I. Install Printer Drivers and Utilities (optional) 3-7 How to Obtain Printer Drivers 3-7 Using the Printing Software Package 3-8 Using the Control Panel 3-9 LaserJet 4L/4ML Control Panel Overview 3-9 The LaserJet 4L/4ML Lights 3-10 The LaserJet 4L/4ML Front Panel Button 3-11 LaserJet 4P/4MP Control Panel Overview 3-12 LaserJet 4P/4MP Control Panel Display and Lights 3-13 Service Mode (LaserJet 4ML/4P/4MP) 3-15 LaserJet 4ML 3-15 LaserJet 4P/4MP 3-15 Setting the Page Count (LaserJet 4P/4MP) -3-17 Setting the Cold Reset Default (LaserJet 4P/4MP) -3-18 Other Service Mode Items 3-18 Printing a Self Test 3-19 LaserJet 4L/4ML: 3-19 LaserJet 4P/4MP: 3-19 The LaserJet 4L Self Test Fields 3-21 The LaserJet 4ML/4P/4MP Self Test Fields 3-23 Continuous Self Test 3-24 LaserJet 4L/4ML: 3-24 LaserJet 4P/4MP: 3-24 Engine Test 3-25
(continued
on back)
Chapter 3
Contents Page 1
Resetting the Printer 3-26 LaserJet 41J4ML: 3-26 LaserJet 4P/4MP: 3-26 Simple Reset 3-26 The Menu of Resets 3-27 The Cold Reset (LaserJet 4ML/4P/4MP) 3-28 LaserJet 4ML: 3-28 LaserJet 4P14MP: 3-28 PJL Software Commands 3-29
Contents Page 2
Chapter 3
chapter CkDntc?nts
4 Maintenancx2
Service Checkpoints 4-2 Life Expectancy of Consumables 4-3 Toner Cartridge Life 4-4 Saving Toner with EconoMode 4-5 Cleaning Printer Components Cleaning Spilled Toner 4-7 4-6
(leafing Paper Jams 4-8 Paper Jams in the Paper Feed Area 4-9 Paper Jams Inside The Printer 4-10 Paper Jams in the Paper Output Area 4-12
Chapter 4
Contents Page 1
Chapter Contents
5 Functional Overview
Basic Printer Functions 5-2 DC Controller/Power System 5-3 Print Engine Control 5-5 Laser and Scanner Drive 5-5 Paper Motion Monitoring and Control 5-5 Top Door/Toner Cartridge Microswitch (SW201) 5-6 Engine Test MicrosWitch (SW301) -5-7 Motors 5-7 Power System (on DC Controller PCA) 5-8 AC Power Distribution 5-8 DC Power Distribution 5-8 Overcurrent/Overvoltage Protection 5-10 Intelligent ON/OFF (LaserJet 41J4ML only) 5-10 High Voltage Power Distribution 5-11 Formatter System 5-12 CPU 5-13 Read Only Memory (ROM) -5-13 Random Access Memory (RAM) -5-13 Non-Volatile Memory (NVRAM) 5-14 Parallel Interface 5-14 High Speed (Yes/No) 5-14 Advanced Functions (On/Off) 5-14 Serial I/O (LaserJet 4P/4MP) -5-15 Pacing (Serial Modes of Operation) 5-15 LocalTalk I/O (LaserJet 4ML/4MP) 5-15 Control Panel 5-16 LaserJet 4L/4ML 5-16 LaserJet 4P/4MP 5-16 Resolution Enhancement (REt) 5-17 Print Density Adjustment 5-17 EconoMode 5-18 Memory Management 5-19 Memory Enhancement technology (MEt) 5-19 Image Adapt (LaserJet 4L/4ML) 5-20 Page Protect 5-20 PJL Overview 5-21
q
m
(continued
on back)
Chapter 5
Contents Page 1
Image Formation System 5-22 Photosensitive Drum 5-23 Drum Sensitivity 5-24 Cleaning Stage 5-25 Conditioning Stage 5-26 Writing Stage 5-27 Developing Stage 5-29 Transferring Stage 5-31 Fusing Stage 5-32 Paper Feed System 5-33 Paper Movement Overview 5-34 Solenoids 5-35 Photosensors 5-35 Paper Out Sensor (PS2) 5-35 Input Paper Sensor (PS1) 5-36 Printing from the Paper Cassette 5-37 Manual Feed Printing 5-38 Small Media Rollers (LaserJet 4P/4MP) 5-38 Paper Jam Detection 5-39 Power-On Jams 5-39 Pickup Jams 5-39 Delay Jams 5-39 Basic Sequence of Operation 5-40 Standard Printer Operation 5-40 General Timing Diagram 5-41
Contents Page 2
Chapter 5
Cx'-?.apbfckmiw?i'Nts
JRmmKmd and W@wmnm?nt Removal and Replacement Required Tools 6-3 User Installable Assemblies 6-4 Memory Upgrade (LaserJet 4L) 6-4 Memory/Language SIMMS (LaserJet 4P/4MP) 6-5 Cover and Doors 6-6 Power, I/O and Memory Printer Cover (LaserJet Printer Cover (LaserJet Rear Door 6-12 Control Panel (LaserJet Doors (LaserJet 41J4ML) -6-6 4L/4ML) -6-7 4P/4MP) -6-9 4P/4MP) ~ 6-13 Strategy 6-2
Left Side Assemblies 6-15 Formatter Shield and PCA 6-15 Gear Train Assembly 6-17 Main Motor 6-19 Front Assemblies 6-20 Front Oblique Roller Assembly 6-20 Paper Cassette Assembly 6-21 Tray Forms Size Guide (LaserJet 4L/4ML) -6-21 Compression Springs 6-22 Internal Assemblies 6-23 Laser/Scanner Assembly 6-23 Fan 6-24 Power Switch Assembly (LaserJet 4P/4MP only) -6-25 Paper Guide/Top Oblique Roller Assembly 6-26 Transfer Roller and Guide 6-27 Transfer Roller Bushings 6-28 `1 Beam-to-Drum Mirror Assembly 6-29
(continued on back)
Chapter 6
Contents Page 1
Rear Assemblies 6-30 Fusing Assembly 6-30 Fusing Assembly Components 6-31 Pressure Plate 6-31 Upper Fusing Assembly (Teflon Sleeve and Heater Element) -6-32 Pressure Roller 6-33 Delivery Assembly 6-33 Lower Delivery Roller 6-34 Lower Delivery GuidelExit Sensor Flag 6-35 Connector Assembly (Fuser Entrance Guide) 6-36 Upper Output Roller Assembly 6-37 Lower Output Rollers 6-38 Bottom Assemblies 6-39 DC Controller Assembly 6-39 Pickup Solenoid (SL2) 6-41 DC Controller Fuses 6-42 High Voltage Connector Assembly 6-42 DC Controller PCA 6-43 Pickup Feed D-Roller 6-46 Pickup Assembly 6-47 Feeder Guide Assembly and High Voltage Shield 6-49 Small Media Roller Assembly (LaserJet 4P/4MP) -6-50 Static Eliminator Strip Assembly 6-51 Toner Cartridge Lever Assembly 6-52 Top Door Switch (Plunger Assembly) 6-53 DC Controller/Scanner Connector Assembly -6-54 PS1 Input Paper Sensor Arm 6-56
Contents Page 2
Chapter 6
... TmlldMeshmtintg Troubleshooting
-'
Flowchart 7-2 7-4
Paper Path and Components DC Controller Diagram 7-5
Printer Error Troubleshooting 7-6 LaserJet 4L/4ML: 7-6 LaserJet 4P/4MP: 7-6 Priority of Errors 7-7 Recoverable Errors 7-7 Service Errors 7-11 LaserJet 4L/4ML 7-11 LaserJet 4P/4MP 7-11 Clearable Warnings (LaserJet 4P/4MP) 7-18 Image Formation Troubleshooting 7-19 Engine Test 7-36 Engine Test Button Location 7-36 Printing an Engine Test - LaserJet 4L/4ML 7-36 Printing an Engine Test - LaserJet 4P/4MP 7-37 Half Self Test Functional Drum Rotation Functional High-Voltage Paper Curl 7-42 Adjustment Procedures 7-43 Leading Edge Adjustment 7-43 Beam-to-Drum Mirror Adjustment 7-44 Troubleshooting Tools 7-46 Repetitive Image Defect Ruler 7-46 Main Wiring Diagram 7-47 Check 7-39 Check 7-40
Power Supply Check 7-41
Chapter 7
Contents Page 1
Chapter Contents
$
Parts and Diagrams How to Use the Part Lists and Diagrams 8-2 Orderhw Parts 8-2 Orderin~ Consumables 8-3 Common Hardware 8-4 Accessories Assembly and Supplies -8-5 Locations -8-7
a
Covers and Doors (LaserJet 4L/4ML) -8-8 Covers and Doors (LaserJet 4P/4MP) -8-10 Internal Components Internal Components Internal Components 1 8-12 2 8-14 3-8-16 8-18 -8-20
DC Controller Assembly
Gear Train Plate Assembly
Paper Cassette (LaserJet 4L/4ML) 8-21 Paper Cassette (LaserJet 4P/4MP) 8-22 Pickup Assembly Fuser Assembly 8-23 -8-24
Keyboard Overlay (LaserJet 4P/4MP) 8-26
Chapter 8
Contents Page 1
AppendixA
Parts Index
Appendk B
170IMorrnation
Product Itiormation
Product Information Printer Features
Printer Features
Features Print Speed Text &Graphics Resolution
I
LaserJet 4L (C2003A)
I
LsaarJet 4ML (C2015A)
I 4ppm 300 dpi; @JS Res Enhancement technology (REt) 300 dpi; plus Res Enhancement technology (REt) 600 dpi; plus
Res Enhancement technology (REt)
600dpi; plus Res Enhancement technology (REt)
Printer Language Stsndard Optionat
Enhanced PCL 5 None
Enhanced PCL 5 PostScript Level 2 None
Enhanced PCL 5 PS L2 (with SIMM +4 Mb opt memory)'
Enhanced PCL 5 PostScript Level 2 None
Monthly Usage (pages)
I Upto6000
UP tO 8000
up to 8000
UP to 8000
Output Tray Capacity
I 50
50
1 45 PCL, 35 PS
I
*
Standard Interfaces Parallel (13-tronics)
o
Parallel (8i-tronics) LocalTalk
=--l=Setial (9 pin) Parallel (8i-tronics) Serial (9 pin) Parallel (!3-tronics) LocalTalk lF'owerswitch I I Power switch
Power Control
1 bteligentC)n/Ofl
Intelligent On/Ofl
1
EconoMode (toner saving) Min. Paper Size (using flat paper path)
1
Yes 3 x 6.75 inch (76 x 171 mm)
See "Accessories Supplies"in Cha ter 8 for optionproductnumbers. & 2 Printermemoryis optimizedwith MemoryEnhancement echnology(MEt). T
Product Information Identification
Identification
Model and Serial Numbers
The model number and serial numbers are listed on identification labels located on the rear of the printer. The model number is alphanumeric, such as C2003A for the HP LaserJet 4L. The serial number contains information about the Country of Origin, the Revision Level, the Production Code, and production number of the printer. The rear labels also contain power rating and regulatory information as shown in Figure 1-1.
I
Figure 1-1
I
Sample Model and Serial Number Labels
Product Information Specifications
Specifications
Table 1-1 Printer Dimensions LaserJet 4L/4ML (C2003A/C2015A) 36 cm (14,25 in.) 137 cm (14.5 in.) , 116.5 cm (6.5 in.) LaserJet 4P/4MP (C2005A/C2040A) 40 cm (15.75 in.) 139 cm (15.5 in.) 1 118 cm (7 in.)
Dimension Width Depth Heiaht
I
Table 1-2
Performance CATEGORY
Specifications
I
Print Speed *
I
SPECIFICATION
I
Up to 4 pages per minute Up to 8000 pages Approximately lApproximately 3000 pages 34 seconds
Monthly Usage (Duty Cycle) Life Expectancy of toner cartridge** I First Print
I
*Actual speed depends on data complexity and software handling efficiency. **Toner Cartridge life can be extended by using EconoMocle.
Product Information Specifications
Table 1-4
Electrical Specifications WATTS (typical)
VOLTS 120 Vact10% 100 Vac ? 10% 220 Vac f 1O% 240Vac k 10%
FREQ 50/60 Hz k 2 Hz 50/60 Hz? 2 Hz 50/60 Hz+ 2 tiz 50/60 Hz k 2 Hz
AMPS* 36 ,8 "
4L14ML
I
4P14MP
*Operating current requirements.
Table 1-3
Environmental
Specifications `temperature: 10° C to 32.5° C (50° F to 90.5° F) Iumidity: 20-80% (no condensation) `temperature: -20° to 60° C (-4° to 140"F) Iumidity: 15-90% (no condensation) 4L 4P 4ML 4MP
Operating Environment Storage Environment (not including toner cartridge) Acoustic Emissions Operation position (per ISO 9296, DIN 45635,T.1 9): Printing
Standby LPA dB(A)
<48 <22
<49 <33
<51 <22
<49 <31
LPA dB(A)
Bystander 1m (per ISO 7779, DIN 45635,T.1 9): Printing Standby
Sound Power
LPA dB(A)
<45 <22 <5.9 <3.5
<46 <30
<47 <22 <6.1 <3.6
<46 <29 <6.0 <4,4
LPA dB(A) (per ISO 9296): LPA dB(A) LPA dB(A)
Printing Standby
<6.0 <4.4
Product Information Product Overview
Product Overview
External Assembly Locations (LaserJet 4L/4ML)
Figure 1-2
External Assembly Locations, Laserdef 4L/4ML
Product Information Product Overview
External Assembly Locations
(LaserJet 4P/4MP)
Product Information Product Overview
Internal Assembly Locations
Figure 1.4
Internal Assembly Locations (all printers) 10, Pickup Feed D-Roller 11. Transfer Roller Assembly 12, Photosensitive Drum
1, Face-Down Output Rollers 2. Upper Fusing Assembly 3. Laser/Scanner Assembly
4. Primary Charging Roller 5. Beam-to-Drum 7. Toner Cartridge 8. Registration Roller 9. Oblique Rollers Mirror
13. DC Controller PCA 14. Paper Cassette 15. Fusing Pressure Roller 16. Face-up Delivery Roller 17. Face-Up/Face-Down Deflector
6. Developing Cylinder
Product Information Product Overview
Fim.me 1-5 shows the location of assemblies visible from the ton of th; LaserJet 4L printer with the printer cover removed. `
~lgure 1-5
LaserJet 4L Internal Assembly Locations 8. Fusing Assembly 9. Lower Output Rollers (Face-Down) 10. Upper Output Rollers (Face-Down) 11. Fan (FM1) 12. Beam-to-Drum 13. Laser/Scanner Mirror Assembly
1. Transfer Roller 2. Paper Guide/Top Oblique Roller 3. Front Oblique Roller 4, Switch Actuator 5. Formatter PCA 6. Main Motor 7. Gear Train Assembly
Product Information Product Overview
Figure 1-6 shows the location of assemblies visible from the top of the LaserJet 4P printer with the printer cover removed.
Figure 1-6
LaserJet 4P Internal Assembly Locations 9. Fusing Assembly Oblique Roller 10. Lower Output Rollers (Face-Down) 11. Upper Output Rollers (Face-Down) 12. Fan (FM1) 13. Power Switch (not shown) 14, Beam-to-Drum 15, Laser/Scanner Mirror Assembly
1. Transfer Roller 2. Paper Guideflop
3. Front Oblique Roller 4. Cartridge Bracket 5. Formatter PCA 6. SIMM Slots (3) 7, Main Motor 8. Gear Train Assembly
Product Information Safety Information
Safety Information
Laser Safety
The Center for Devices and Radiological Health (CDRH) of the U.S. Food and Drug Administration implemented regulations for laser products manufactured since August 1, 1976. Compliance is mandatory for products marketed in the United States. This printer is certified as a "Class 1" laser product under the U.S. Department of Health and Human Services (DHHS) Radiation Performance Standard according to the Radiation Control for Health and Safety Act of 1968. Since radiation emitted inside this printer is completely confined within protective housings and external covers, the laser beam cannot escape during any phase of normal user operation. Never operate or service the printer with the protective cover removed from the Laser/Scanner Assembly. The reflected beam, although invisible, can damage your eyes.
1-11
Product Information Safety Information
Laser Statement
(Finland)
The following applies to printer operation and servicing in Finland. LASERTURVALLISUUS LUOKAN 1 LASERLAITE KLASS 1 LASER APPARAT HP LaserJet(s) 4ML, 4P &. 4MP Iaserkirjoitin on kayttajan kannalta turvallinen 4L,
luokan 1 laeerlaite. Normaalissa lasersateen Kirjoittimen kaytossa kirjoittimen suojakotelointi estaa paasyn laitteen ulkopuolelle. on hyvaksynyt Suomessa laserturvallisuuden osalta valtioneuvoston
Stikotarkastuskeskus.
Laitteen turvallisuusluokka
on maaritetty
paatoksen N:o 472/1985 ja standardin EN 60825 (1991)
mukaisesti.
VAROITUS ! Laitteenkayttaminenmuullakuin kayttoohjeessa mainitullatavalla 1 saattaaaltistaakayttajanturvallisuusluokan ylittavalle nakymattomalle
lasersateilylle.
VARNING ! Om apparatenanvandspa annatsattw i bruksanvisning specificerats, an anvandaren k utsattasfor osynliglaserstr~lning, omoverskrider s griinsenfor laserklass1. HUOLTO HP LaserJet(s) L, 4ML,4P & 4MP-kirjoittimen 4 sisalliiei ole kayttajan huollettavissa oleviakohteita.Laitteensaaavataja huoltaaainoastaansen huoltamiseen koulutettuhenkilo.Tallaiseksihuoltotoimenpiteeksi katsota ei variainekasetin vaihtamista, aperiradan p puhdistusta muitakayttajiin tai kasikirjassalueteltuja,kayttajantehtavaksitarkoitettuja yllapitotoimia,otka j voidaansuorittaailmanerikoistyokaluja. VARO ! Mikalikirjoittimensuojakoteloavataan,olet alttiinanakymattomalle lasersateilylle laitteenollessatoiminnassa. a katsosateeseen. ~ VARNING ! Omlaserprinterns skyddsholje oppnasd5.apparatenar i fanktion, utsattasanvandaren osynliglaserstr~lning. etraktaej str?alen. for B Tiedotlaitteessakaytettavanlaserdiodinsateilyominaisuuksista: Aallonpituus777-795nm Teho 5 mW Luokan3B laser
Product Information Safety Information
Declaration
of Conformity
According
to ISO/IEC Name:
Guide
22 and EN 45014: Hewlett-Packard Company
Manufacturer's Manufacturer's
Address:
11311 Chinden Boulevard Boise, Idaho 83714-1021, USA
declares, that the product Product Name(s): Model Number(s): Product Options: LaserJet 4L/4ML/4P/4MP C2003A, C2015A, C2005A, C2040A All
conforms to the following Product Specifications: Safet~ EN 60950:1988+ A1,A2 IEC 825:1984 + A1:1990 laser class 1 CISPR-22:1985 / EN 50082-1:1992 IEC 801-2:1991/ IEC 801-3:1984/ IEC 801-4:1988/ EN 55022:1988 class Bl)
EMC:
prEN55024-2:1992 - 3kV CD, 8 kV AD prEN55024-3:1991 - 3V/m prEN55024-4: 1992-1 kV Power lines
Supplementary Information: The product herewith complies with the requirements of the Low Voltage Directive 73/23/EEC and the EMC Directive 89/336/EEC. 1) The product was tested in a typical configuration with Hewlett-Packard Personal Computer and Test Systems. Office of Quality Manager Boise, Idaho USA June 15, 1993
European Contact: Your Local Hewlett-Packard Sales and Service OffIce or Hewlett-Packard GmbH, Department ZQ / Standards Europe, Herrenberger Strae 130, D-7030 Bblingen (FAX + 49-7031-14-3143)
1-13
Product Information Safety Information
Toner Safety
Note In case of toner spills, skin and clothing are best cleaned by removing as much toner as possible with a dry tissue, then washing with cold water. Hot water causes toner to permanently set into clothing.
MSDS Information A Material Safety Data Sheet (MSDS) for toner or any other chemical used in the printer is available through Hewlett-Packard's Customer Information Center by either mail or fax. By mail: To obtain an MSDS for the HP 92274A toner cartridges through the mail, call the Customer Information Center (CIC) at 1-800-752-0900 between 6 A.M. and 5 P.M. Pacific Standard Time. By fax To obtain an MSDS for the HP 92274A toner cartridges by fax, call HP ASAP (Automated Support Access Program) at 1-800-333-1917 and follow the instructions for using the HP FIRST fax service. See "Technical Assistance" later in this chapter for more information on the HP FIRST service.
Note
Ozone Emission
These printers do not use high voltage corona wires in the electrophotographic process, and therefore generate no measurable ozone gas (03). The printers instead use charging rollers in the toner cartridge and in the print engine.
Product Information FCC Statement (Class B)
FCC Statement (Class B)
Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause hmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
q q q
Reorient or relocate the receiving antenna. Increase the separation between the equipment
and the receiver.
Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. Consult the dealer or an experienced help. radio/TV technician for
q
Any changes or modifications not expressly approved by Hewlett-Packard could void the user's authority to operate this equipment. Use of a shielded interface cable is required to comply within the Class B limits in Part 15 of FCC rules.
Note
1-15
Product Information VCCI Statement (Japan)
VCCI Statement (Japan)
The VCCI statement below is required in Japan. It is similar to the FCC regulatory statement. -
Product Information Service Approach
q
Service Approach
Repair of the printer normally begins with use of the printer's internal diagnostics in conjunction with the troubleshooting procedures in Chapter 7. Once a faulty part is located, repair is accomplished generally by assembly-level replacement of Field Replaceable Units (FRUS). Some mechanical parts maybe repaired at the sub-assembly. PCA component replacement is not supported by HP. Part numbers for all FRUS are located in Chapter 8 of this manual.
q
Exchange
Program
HP offers remanufactured assemblies for some selected parts. These are identified in Chapter 8 and can be ordered through HP's Parts Direct Ordering, or Parts Center Europe (PCE).
Ordering Parts
Field replaceable part numbers are found in Chapter 8 of this manual. Replacement parts may be ordered from HP's Parts Direct Ordering, or Parts Center Europe (PCE). Adresses and phone numbers for both organizations are also found in Chapter 8.
Ordering Consumables
Consumables may be ordered directly from Hewlett-Packard. The phone numbers for ordering consumables are found in Chapter 8.
1-17
Product Information Service Approach
Ordering Related Documentation
Table 1-5 shows where to order related documentation. numbers for the various sources are: . PDO (Parts Direct Ordering) 1-S00-227-8164 (U.S. only) PCE (Parts Center Europe) (49 7031) 14-2253. (HPD) Phone
.
e HP's Distribution Center 303-353-7650 (U.S. Ody)
Product Information Service Approach
Table 1-5
Relaiecl Documentation
DESCRIPTION HP LaserJet Family Quick Reference Service Guide HP LaserJet 4L User's Manuall HP LaserJet 4ML User!s Manuali HP LaserJet 4P User's Manualf HP LaserJet 4MP User% Manual' HP PCL5 Printer Language Technics/ Reference Information Package HP LaserJet Printer Family Paper Specifications Guide HP LaserJet 4L Software Solutions Pkg, f HP LaserJet 4ML Windows Solutions Pkg. 1 HP LaserJet 4ML Macintosh Solutions Pkg.1 HP LaserJet 4P Software Packl HP LaserJet 4MP Software Packl'2
PART NUMBER 5961-0531
PDO x
I PCE
I
HPD
x
C2003-90901 C2015-90901 C2005-90943 C2040-90912 5961-0601 5002-1801 C2003-60122 C201 5-60101 C201 5-60113 C2OO5-6O1O7 C2040-60101 ;
xx xx xx xx xx x x x x ~
1
x
Shiu~ed with Drinter. (English version Dart number is shown tra;~lations a;e available --see your loc~l HI Sales Office.) . Includes DOS. Windows and Macintosh solutions. z
Other
Print
Utilities
HP provides several utilities for enhancing use of the LaserJet printers in DOS, MS Windows, and Macintosh environments. More information on specific utilities is included with each of the software packs listed in Table 1-5.
1-19
Product Information Technical Assistance
Technical Assistance
HP ASAP 1-800-333-1917 (U. S.)
HP ASAP (Automated Support Access Program) provides free technical support information 24 hours a day, 7 days a week. The ASAP system includes HP FIRST and HP AUDIO-TIPS, both explained below. The ASAP service requires a touch-tone phone.
HP FIRST
HP FIRST (Fax Information Retrieval Support Technology) is a phone-in fax service providing technical information for HP LaserJet users as well as service personnel. Receiving a fax requires a group 3 facsimile machine or fax card. Service-related information includes: Service notes (HP Authorized dealers). Application notes. Product Data Sheets. Material Safety Data Sheets (MSDS). Typeface and accessory information. Printer support software information. Toner information. Driver request form and Software Matrix. HP FIRST, U.S. and follow the voice
Call the HP ASAP system (1-800-333-1917) prompts to enter HP FIRST. HP FIRST, Europe
Call HP FIRST at one of the following numbers: U. K., 0800-96-02-71 Netherlands, 06-0222420 Belgium (Dutch), 078-111906 Germany, 0130-810061 Switzerland (German), 155-1527 Austria, 0660-8128 For English service outside the above countries, (31) 20-681-5792
Product Information Technical Assistance
HP AUDIO-TIPS HP AUDIO-TIPS, available within HP ASAP, is an interactive voice response system providing pre-recorded answers to the questions most frequently asked by HP LaserJet printer users. Helpful "System Maps" to the HP AUDIO-TIPS recordings are available by fax through HP FIRST.
HP CompuServe
Forum
CompuServe members can download a variety of support materials including product data sheets, software application notes, and printer drivers for many popular software applications. Members may also post and reply to questions in an interactive format. To access the HP Forum, type GO HPPER at any prompt. For more information, or to join CompuServe, call 1-800-524-3388.
Customer Information
Centers
For further technical assistance, service-authorized HP and dealer service personnel can contact the nearest Hewlett-Packard Customer Information Center, 1-800-752-0900 in North America.
Customer Support Center (Assist Line)
The HP Customer Support Center, (208-323-2551) is available to answer technical questions regarding setup, configuration, installation and operation of HP printers in the PC and Macintosh environments. The CSC Assist Line is available weekdays from 7AM to 6 PM Mountain Time (Wednesdays until 4 PM). Questions relating to operating systems such as MS-DOS and UNIX, your network conjuration, or network operating system cannot be answered by the Center and should be referred to your authorized reseller.
1-21
Product Information Technical Assistance
European
Customer Support Center
The HP European Customer Support Center, located in Amsterdam, Holland, is open from 8:30 am to 6:00 pm central European time (Wednesdays until 4:00 pm). Multilingual customer support representatives can answer technical questions similar to the U.S. CSC, described on the previous page. This service is available at no charge for a period equivalent to the original HP hardware warranty period. Each time you call the HP European Customer Support Center, you will be required to provide the printer's serial number and original date of purchase. To receive a fax listing the supported languages on a countries' phone number, call HP FIRST (refer to "HP FIRST," earlier in this section). You can also call the nearest HP sales and service office to obtain the telephone number for the Center. The Center features automated call-routing technology, so you will receive faster service if calling from a touchtone phone or tone dialer.
Other Areas
Outside of North America and Europe, contact your local HP sales office for assistance in obtaining technical support.
2
=.~
Operating Requirements
Operating Requirements SiteRequirements
Site Requirements
Operating Environment
The environmental specifications listed in the "Specifications" section of Chapter 1 must be maintained to ensure the proper operation of this printer. Consider the following points before installing the printer: Install in a well-ventilated, dust-free area. (Excess dust or smoke will contaminate the printer's Beam-to-Drum mirror, affecting print quality. ) Install on a hard, flat and continuous surface, with all four printer feet level. Do not install on carpet or other soft surfaces. Ensure adequate power supply circuitry. Printer current requirements can be found under "Specifications," in Chapter 1. Lighting Flicker: In an effort to reduce energy consumption, the fuser is turned on only when needed during printing. During standby mode, the fuser is not kept warm. When the printer is installed in a home, the instant-on fuser may cause some house lights to flicker when printing. This phenomenon is seen in many instant-on products, such as copiers, and will NOT affect printing, nor will it harm the electrical system in any way. To reduce a flicker effect, plug the printer into a different outlet that may be on a separate circuit, or try fluorescent lighting. If possible, add to the room's natural lighting. (Surge suppressers will not prevent flickering lights.) Install where there is stable temperature and humidity, with no abrupt changes (away from water sources, humidifiers, air conditioners, refrigerators, or other major appliances). Install away from direct sunlight, open flames, or ammonia fumes. If the printer is placed near a window, make sure the window has a curtain or blind to block any direct sunlight. Install with enough space around the printer for proper access and ventilation (see Figure 2-l).
Operating Requirements Site Requirements
Printer Space Requirements
;~ .... ;.. ` m1 ~" ~ `
A B
c
; ................... ,.,
~, -----""----------"? \ `i\\ \ `,`,;,
II
,--,' . ,------------.
------ *j F -"==4
F.-.
Hgwe z--l
m
wmer
----
space ~equ~remenls
.
-i-able 2-1 Operating Dimensions A (l-m))) El (Dqm) C (Width) D (Rear Dow)
Printer Operating
Dimensions
I
LaserJet 4L/4ML
I
LaserJet 4P/4MP
I 14 inches (35.5cm) 14.5 inches (37 cm) 14.25 inches (36 cm) I 2 inches (5 cm) 13 inches (33 cm) I
I 15 inches (38 cm) 15.5 inches (39 cm) 15,75 inches (40 cm) I 2 inches (5 cm) 14 inches (35 cm)
I
I
E (Height - Top Door Cqoxw))
I
2-3
Operating Requirements The HP 92274A Toner Cartridge
The HP 92274A Toner Cartridge
Toner cartridges contain components which are sensitive to light, temperature, and humidity. Follow the recommendations in this section to ensure the highest quality and longest life of HP toner cartridges. Table 2-2 Toner Cartridge Environmental
1
Conditions
1
I
CATEGORY Operating Storage
I
TEMPERATURE 10° to 32,Y c (50° to 90.5° F) -20° to 40° c (-4° to 104° F)
I
HUMIDITY 35 tO 85% RH 15 to 90% RH
I
Storage Conditions
The toner cartridge is affected by its environment. Packaging protects the toner cartridge from light and increases its storage life. It is important to store the cartridge in its original packaging until the cartridge is ready to be installed in the printer. When storing the toner cartridge in a warehouse or work area, make sure the storage place meets the conditions specified in Table 2-2. The expiration date of the toner cartridge is stamped on the cartridge box. This date allows for up to 2V2 years after manufacture.
Note
Operating Requirements The 1+ 92274A Toner Cartridge
q
Storing Opened Toner Cartridges Because the cartridge does not have a shutter to cover the laser beam access slot, it should be kept inside the printer until empty. Toner cartridges which have had the toner sealing tape removed are also more vulnerable to environmental extremes (such as high humidity). If the toner cartridge must be removed from the printer, always store the cartridge: Inside the protective bag in which it was originally packaged.
In a dark cabinet, away from direct sunlight. Correct side up and in a horizontal end). In a temperature between position (not standing on
10° and 35° C (50° -95° F).
Away from ammonia or other organic solvent fumes. Never ship the printer with a toner cartridge installed. Excessive vibration during shipping can cause toner to leak, contaminating the printer. Never expose the toner cartridge to direct sunlight, or to room light for more than a few minutes. Bright light and direct sunlight can permanently damage a toner cartridge.
CAUTION
2-5
Operating Requirements The HP 92274A Toner Cartridge
Toner Cartridge Handling Suggestions
q
Before installing a cartridge, distribute the toner evenly by rotating the cartridge back and forth five to six times (see Figure 2-2). Repeat this action when toner begins to run low.
Figure 2-2
Distributing Toner
q
Do not touch the sutiace of the photosensitive drum in the cartridge. Protect the drum from light and contamination. Do not disassemble or refill a toner cartridge, vibrations or shock.
q
q
Do not expose the cartridge to unnecessary
q
Do not expose the photosensitive drum to strong light. White areas on the page may indicate that the drum has been exposed to light for too long. If white areas appear, stop the printer and wait a few minutes. This process should eliminate most defective images, If not, the toner cartridge maybe placed in a dark environment for an extended period of time, which may restore some life to the drum. Never manually rotate the drum, especially in the reverse direction; internal damage and toner spills may result.
q
q
q
2-6
Operating Requirements The W 92274.4 Toner Cartridge
Refilled Toner Cartridges
While Hewlett-Packard does not prohibit the use of refilled toner cartridges during the warranty period or while under a maintenance contract, we do not recommend their use. The reasons for this are: Hewlett-Packard has no control or process to ensure that a refilled toner cartridge functions at the high level of reliability of a new HP LaserJet toner cartridge. Hewlett-Packard also cannot predict what the long term reliability effect on the printer is from using different toner formulations found in refilled cartridges. Hewlett-Packard has no control over the actual print quality of a refilled toner cartridge. The print quality of HP LaserJet toner cartridges influences the customer's perception of the printer. Re~airs resultimz from the use of refilled toner cartridges are no{ covered und& the HP warranty or maintenance contract.
Recycling
Toner Cartridges
In order to reduce the amount of plastics and other wastes entering our landfllls, Hewlett-Packard has established a program for recycling used toner cartridges. Parts that do not wear are re-used in manufacture of new cartridges. Plastic and other materials are recycled. HP pays the shipping costs. In addition, a one dollar donation is shared by the Nature Conservancy and the National Wildlife Federation for each cartridge returned under this program. To join this recycling effort, follow the instructions included inside each toner cartridge box.
2-7
Operating Requirements Media Specifications
Media Specifications
Several types of print media can be used with HP LaserJet printers, provided the media specifications are met, Using media that does not meet the specifications listed in this section may increase the incidence of paper jams, cause premature printer wear, and contribute to repair costs. More detailed media specifications are available in the HP LaserJet Printer Family Paper Specification Guide, part number 5002-1801. To order additional copies, refer to "Ordering Related Documentation" in Chapter 1.
Note
It is possible that print media can meet all of the general specifications listed and still not print satisfactorily because of the printing environment or other variables over which Hewlett-Packard has no control. Hewlett-Packard neither warrants nor recommends the use of any particular media brand. Properties are subject to change by manufacturers and HP has no control over such changes. The operator should test particular media prior to large purchases. All media should be stable at the 392° F / 200° C temperatures encountered in the printer's fusing process. Use ordy media recommended for use in laser printers. Printer damage resulting from use of incompatible media will not be covered by HP warranty or service agreements.
CAUTION
2-8
Operating Requirements Media Specificatkms
Media Sizes Supported
The following media sizes are supported by the printer's paper cassette and manual feed slot. -i-able2-3 Supported MediaS3zes LaserJet 4L/4ML Sizes Minimum size:* 3 x 7.5 in. (76x 190 mm) 3x5in. (76x 127mm) Letter, 8.5 x 11 in. (216x279 mm) LaserJet 4P/4MP Universal Cassette 7 Y Manual Feed
Legal, 8.5 x 14 in. (216x 356 mm) I Exec, 7.25 x 10.5 in. (184x 267 mm) A4, 210 x 297 mm (8,27 x 11.69 in.) Envelopes: Com-10, 4.1 x9.5 in. (105 x241 mm) Monarch, 3.87 x 7.5 in. (98x 191 mm) DL, 110 x220 mm (4.3 x 8.6 in,) C5, 162x 229 mm (6.4 x 9 in.)
-1x X1X x
X x r r r r I X x I
+=
x x X1X x
r r x x x
" Use the "flat paper path" only (manual feed and rear outpu
Operating Requirements Media Specifications
Media Selection Guidelines
To achieve the best possible print quality and avoid paper jams, follow these guidelines for selecting paper: Use only high quality, copier grade paper. Avoid paper with embossed lettering, perforations, or texture that is too smooth or too rough. Colored paper should be of the same high quality as white photocopy paper. The pigments must withstand the printer's fusing temperature of 392° F (200° C) for 0.1 second without deterioration. Do not use paper with a colored coating that was added after the paper was produced. Pre-printed forms must be printed with non-flammable, heat-resistant inks that do not melt, vaporize, or release hazardous emissions when subject to the printer's approximately 392° F (200° C) fusing temperature for 0.1 second. Always test a small sample of a new print media before purchasing large quantities. Give a copy of the table on the next page to your paper vendor to ensure that the paper you purchase meets the specifications for this printer. More detailed specifications are in the HP LaserJet Printer Family Paper Specification Guide, HP Part No. 5002-1801. (See "Ordering Related Documentation" in Chapter 1.)
Operating Requirements Media Specifications
q
Basis Weight
Paper Cassette: 16 to 28 pound (60 to 105 g/m2). Manual Feed Slot: 16 to 36 pound (60 to 135 g/m2).* Cut sheet to within 0.3 inch (0.8 mm) of nominal, 0.20° square. 100% chemical wood pulp and/or cotton fiber. Long grain. 4,7 *I% by weight. moisture proof ream wrap.
Finishing Precision
q
Furnish (Composition) Grain Moisture Content Packaging Smoothness
Polylaminated
100 to 250 (Sheffield)*
* LaserJet 4P/4MP only Heavier paper stock, in the range of 36 to 42 pound (135 to 158 gid) may be used, but must use the "flat paper path" (manual feed, rear output) and have a Sheffield smoothness rating not greater than 180.
~~~~~
The "flat paper patlf (manual feed slot and rear face-up delivery door) is recommended for envelopes, overhead transparencies, and labels.
2-11
Operating Requirements Media Specifications
Envelope Specifications
Choose envelopes that are well-constructed. They should lay flat and be sharply creased. They should not be wrinkled, nicked, or otherwise damaged. Envelopes with a peel-off adhesive strip, or more than one fold-over flap to seal, must use adhesives compatible with the heat and pressure of the printer's fusing process. When printing envelopes, always use the "flat paper path" ~manual feed siot and the rear face-up delivery door). To prevent severe printer damage, do not use envelopes having windows, clasps, snaps, or synthetic materials.
CAUTION
TaMe 2-5 Paper
Envelope
Specifications
Paper used for envelope construction must meet the requirements in the table under "Media Selection Guidelines." 20 to 24 pound (75 to 90 g/m2), single thickness 3.3 to 5.5 roils (0.084 to 0.14 mm), single thickness Envelopes must lay flat with no more than 0.2 in. (5 mm) curl across the entire surface. Envelopes must not have any adhesive exposed to the printer. They must be folded accurately, within f 0.04" (1 mm). There must be no more than two thicknesses of paper anywhere along the leading edge. All folds must be well scored and sharply creased, and construction must be tight (not baggy). Envelopes must not be stuck together with excess seam sum. 1100% chemical wood pulp and/or cotton fiber. Must not scorch, melt, offset, or release hazardous emissions when heated to 392° F (20V C) for 0.1 second, Long grain. 4.7 +1% bv weiaht. 1100 to 250 (Sheffield)
Basis Weight Caliper Curl (Pre-printed) Finishing
I
I
Furnish (Composition) Fusing Compatibility Grain Moisture Content Smoothness
I
Operating Requirements Media Specifications
Adhesive
Label Specifications
when selecting labels:
Use the following guidelines
The top sheet (printing surface) must be of copier quality and provide good toner adhesion. The carrier sheet (backing sheet) must be compatible with the temperatures and pressure of the fusing process, and must be coated for easy release of the top sheet. The adhesive must be stable at the 392° F (200° C) temperatures encountered for 0.1 second in the printer's fusing process, and must not produce emissions that exceed exposure levels or threshold limits established by OSHA and other safety agencies. Adhesives must not come into direct contact with any part of the printer. Labels must be arranged on the carrier sheet so that any exposed spaces run lengthwise down the sheet. Using label stock with spaces between the horizontal rows of labels can often result in labels peeling off during printing, causing serious jamming and possible printer damage. wide selection of suitable labels is available through Hewlett-Packard. A list of available sizes is in the H"P LaserJet Printer Family Paper Specification Guide, HP Part No. 5002-1801. See Chapter 1 for ordering information, or contact your local authorized HP dealer. Do not attempt to print on label sheets after any of the labels have been removed from the sheet. Damage to the printer may result.
CAUTION
-
2-13
Operating Requirements Media Specifications
Adhesive
Must not be on any external surfaces of the label before, during or after printing. Label construction and die-cutting must not allow labels to peel off during transport, printing, or fusing. Must not exceed 0.007 in. (0,1 9 mm) In ream: flat within 0,2 in, (5 mm) Cut sheet within 0.031 in. (0.79 mm) of nominal and 0.20° square. All adhesives, carrier sheets, top sheets, and other materials used in label construction must be compatible with the heat and pressure of the fusing iprocess, Materials must not discolor, melt, offset, or release hazardous emissions when heated to 392° F (20V C) for 0.1 second, Moisture proof wrap to preserve properties.
Caliper Curl Finishing Precision
Fusing Compatibility
Packaging
-- The "flat paper path" (manual feed slot and rear face-up delivery door) is recommended for printing adhesive labels.
Transparency
Specifications
Overhead transparencies used in HP LaserJet printers must be able to withstand the 392° F (200° C) temperatures encountered in the printer's fusing process for 0.1 second. Suitable transparency film is available through Hewlett-Packard. Refer to Chapter 3 of the HP LaserJet Printer Family Paper Specification Guide, HP Part No. 5002-1801 for details.
Caliper Cutting Angle Finishing precision
13.9 to 4.3 roils (0.100 to 0.110 mm) 90° * 0.2° Cut sheet to within 0.03 in. (0.8 mm) of nominal and t 0.2° of square. Overhead transparency material must be compatible with the heat and pressure of the fusing process. Materials must not discolor, melt, offset material, or release hazardous emissions when heated to 392° F (200° C) for 0,1 second.
Fusing Compatibility
The "flat paper pat~ (manual feed slot and rear face-up delivery door) is recommended for printing transparencies.
2-15
Operating Requirements Media Specifications
Storing Print Media
Follow these guidelines when stacking and storing print media:
Store paper in its ream wrapper until ready to use. DO NOT store cartons or reams directly on the floo~ place cartons on a pallet or on shelves. DO NOT store individual reams in a manner that causes them to curl or warp along the edges. Re-wrap partially used packages of media before storing. DO NOT stack more than six cartons on top of each other. Stack each carton squarely on top of the one underneath. Stack each carton upright. DO NOT place anything on top of media, regardless the paper is packaged or unpackaged. of whether
Store envelopes in a protective box to avoid damaging the envelope edges. Keep stored media away from temperature extremes. and humidity
DO NOT store printed documents in vinyl folders (which may contain plasticizers) or expose the documents to petroleum based solvents.
Shipping Print Media
When shipping print media through different environments, plastic wrap all cartons on the shipping pallet. When shipping media across bodies of water, wrap individual cartons as well. Packaging must protect the media from physical damage.
Installation and Configuration
Installation and Configuration Unpacking and Installation
Unpacking and Installation
Before unpacking the printer, inspect the shipping container for signs of physical damage. Since a damaged shipping box is an indication of improper handling during shipping, the printer may also be damaged. If the shipping container has any sign of damage, unpack and power the printer ON with the carrier's agent present. If the printer appears damaged or fails self test, do not accept it.
Note
A. Choose the best location.
Verify that the printer location meets all requirements Chapter 2. listed in
B. Unpack the printer.
1. Remove the power cord, the manuals, and the toner package. 2. Remove the printer from its box. 3. Remove the outer packing material from the printer. 4. Open the printer top door by pressing the door release button on the right side of the printer (see Chapter 1, Figure 1-2 or 1-3 for location). 5. Pull out the paper cassette. 6. Remove the packing spacers from the inside of printer (2 on the Transfer Roller) and from the paper cassette (2).
.
Installation and Configuration Wy3acking and installation
C. Check package contents. Nate
If any of the package contents are missing or damaged, contact your HP dealer immediately.
The package should include the following:
q Printer. . Power cord.
. Software Solutions package.
q q
User's Manual. Toner cartridge. Interface cables are sold separately. Chapter 8 for part numbers. Refer to
Note
D. Install the toner cartridge.
1. Press the top door release button to open its top door.
2.
Remove toner cartridge from its box and cut it open. Save the packing materials for possible cartridge storage.
3. Shake the cartridge vigorously to distribute the toner evenly inside the cartridge (see Figure 2-2 in Chapter 2). 4. Grasp the toner sealing tape tab on the right side of the cartridge. Pull firmly to remove the strip of sealing tape. 5. Grasp the plastic cartridge body (not the metal shutter linkage), and slide the cartridge into the printer, pushing it firmly into place. Close the top door.
-- 3-3
Installation and Configuration Llnpacking and Installation
E. Load the paper cassette.
1. Pull out the paper cassette located at the lower front of printer and load approximately 100 sheets (4L/4ML) or 250 sheets (4P/4MP) of paper. The rear of the stack should fit loosely under the two backstops at the rear of the paper cassette. 2. Insert the front corner of the paper stack under the metal clip at the front of the cassette. Failure to insert the paper under the metal clip will cause skewing or paper jams.
Note
3. Resting the paper cassette on a flat surface, slide it into the printer.
F. Attach the interface cable(s).
1. Open the 1/0 Door on the printer's left rear side (LaserJet 4L/4ML only). Attach the 1/0 cable securely to the printer. Failure to attach the cable securely may result in an 1/0 error.
Note
2. LaserJet 41J4ML: Align the cable with the cable hole and close the 1/0 Door. 3. Attach the I/O cable to the computer.
Installation and Configuration LJnpwking and hsbllattm
G. Attach the power cord.
1. LaserJet 4L/4ML: Open the Power Door at the right rear of the printer by pressing on the back end of the door and swinging it outward. 2. Connect the power cord. On the LaserJet 4P/4MP, turn on the power switch on the right side of the printer. All front panel lights briefly illuminate, then the green Ready light comes on. (LaserJet 4P/4MP: There is a brief self test period before the Ready and the On Line lights are illuminated and the display reads %3 FZIXW.) 3. LaserJet 4L/4ML: Align the power cord with the hole at the rear of the door and close the Power Door. 4. LaserJet 4L/4ML: Briefly press the front panel button to generate a self test and verify that the printer is working. LaserJet 4P/4MP: Press the key, then Menu repeatedly until "%;;;T !%+:!..! appears. Then press _ display SZL.F T'zx-~. Press_ to print a self test.
once to
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J.~
L=
Refer to the section "Printin~ a Self Test." later in this chapter, for a detaile~ description' of self test information.
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Power On/OfX The LaserJet 4P/4MP uses a conventional on/off power switch. The LaserJet 4L and 4ML printers do not have a power, switch, but use Intelligent On/Off sensing instead. (See "Intelligent On/Off in Chapter 5.)
Installation and Configuration Unpacking and installation
H. Attach the Help Labels (L-erJet 4~4ML onlY)
Packaged with the User's Manual is a sheet of help labels. These labels explain the meanings of the front control panel lights. Attach the large help label to the inside of the printer's top door, and the small label next to the front panel lights, as shown in Figure 3-1.
Figure
3-1
Attaching
the Help Labels
(LaserJet
4L/LMUW
3-6
I. Install Printer Drivers and Utilities (optional)
Printer drivers are specialized programs designed to allow specific software applications to function with the HP LaserJet printers. Printer utilities include such things as the HP Explorer program modules, which enhance the usability of the printer and provide convenient access to printer features outside of specific software applications. How to Obtain Printer Drivers First, check the software's printer selection feature to see if the printer is listed among the available printers. If it is not, run the software's SETUP or INSTALL program to install a "ptinter driver" or "printer file" for the printer. Here are some ways to obtain printer drivers and Software Application Notes for HP LaserJet printers:
q
q
Check the Printing Software package to see if it includes a driver for your software. at 303-353-7650.
. Order an updated driver from the software vendor. . Call Hewlett-Packard . Obtain a driver request form by fax through HP FIRST (call 1-800-333-1917). . Download a driver through CompuServe's HP Forum. To sign up for CompuServe, call 1-800-848-8199. ,,.,.., _ J'. , .-; While waiting for a specific HP LaserJet printer driver, you can substitute a similar printer driver (such as a driver for the HP LaserJet III, 111P, or 4 printer), These substitute drivers will allow you to use the printer, but they do not support all of the printer's features.
Installation and Configuration Unpacking and k"istallaiion
Using the Printing Software Package The Printing Software package supplied with the printer provides many useful programs and utilities, including: Printer drivers for several popular software applications. Utilities for automatically hard disk. Software Application copying printer drivers onto your
Notes for the above applications.
The HP Explorer utilities, including . A setup program which installs other HP Explorer modules and automatically updates the computer's AUTOEXEC.BAT and CONFIG. SYS files. Use the setup program to add or delete any of HP Explorer's utilities at any time. . The HP Explorer Remote Control Panel allows changes to printer settings from the computer's screen. It supplements the software's printer support to permit complete control over the printer's features.
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The HP Explorer Status Monitor is a "Terminate-and-StayResident" (TSR) program that automatically displays messages from the printer on the computer's screen whenever the printer's status changes.
. The HP Explorer Travel Guide is a guide to the printer's features. It also serves as an on-line help utility when using other HP Explorer modules.
Installation and Configuration L/sing M Cbi'm91 FJWEd
Using the Control Panel
LaserJet 4L/4ML Control Panel Overview
The HP LaserJet 4L/4ML printer's front control panel consists of 4 status lights and a front panel button situated on top of the printer.
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-' Front Panel
A
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Front LaserJet L/4ML 4
Panel
3-9
Installation and Configuration
The LaserJet 4L/4ML Lights The LED lights provide a quick way to check the printer's status. Ready (Green) STEADY: The printer is ready to print a job from the paper cassette, BLINKING: