Brother HL-4000CN User manual

Brother Color Laser Printer
SERVICE MANUAL
MODEL: HL-4000CN
Read this manual thoroughly before maintenance work.
Keep this manual in a convenient place for quick and easy reference at all times.
January 2002
SM-PRN027

© Copyright Brother 2002
All rights reserved.
No part of this publication may be reproduced in any form or by any means without permission in
writing from the publisher.
Specifications are subject to change without notice.
Trademarks:
The brother logo is a registered trademark of Brother Industries, Ltd.
Apple, the Apple Logo, and Macintosh are trademarks, registered in the United States and other
countries, and True Type is a trademark of Apple computer, Inc.
Epson is a registered trademark and FX-80 and FX-850 are trademarks of Seiko Epson
Corporation.
Hewlett Packard is a registered trademark and HP Laser Jet is a trademark of Hewlett Packard
Company.
IBM, IBM PC and Proprinter are registered trademarks of International Business Machines
Corporation.
Microsoft and MS-DOS are registered trademarks of Microsoft Corporation.
Windows is a registered trademark of Microsoft Corporation in the U.S. and other countries.

PREFACE
This service manual contains basic information required for after-sales service of the color laser
printer (here-in-after referred to as "this machine" or "the printer"). This information is vital to the
service technician to maintain the high printing quality and performance of the printer.
This service manual covers the HL-4000CN color laser printer.
This manual consists of the following chapters:
CHAPTER I : SPECIFICATIONS
Specifications, etc.
CHAPTER II : INSTALLATION
Installation conditions and installation procedures.
CHAPTER III : STRUCTURE OF SYSTEM COMPONENTS
Basic operation of the mechanical system, the electrical system and the electrical
circuits and their timing information.
CHAPTER IV : ASSEMBLY / DISASSEMBLY
Procedures for replacement of the mechanical system parts.
CHAPTER V : TROUBLESHOOTING
Description of error messages on the control panel, troubleshooting image
failure, etc.
CHAPTER VI : DIAGRAMS
CHAPTER VII : PLUG / JACK (P/J) CONNECTOR LOCATIONS
Information in this manual is subject to change due to improvement or re-design of the product. All
relevant information in such cases will be supplied in service information bulletins (Technical
Information).
A thorough understanding of this printer, based on information in this service manual and service
information bulletins, is required for maintaining its print quality performance and for improving the
practical ability to find the cause of problems.

CONTENTS
CHAPTER I SPECIFICATIONS ........................................................I-1
1. PRODUCT NAME ............................................................................................ I-1
2. DIMENSIONS / WEIGHT (MAIN UNIT)............................................................ I-1
3. SPACE REQUIREMENTS ............................................................................... I-1
4. PRINTER SYSTEM CONFIGURATION........................................................... I-2
4.1. Outline of the Printer.............................................................................................................I-2
4.2. IOT Function Outline.............................................................................................................I-3
4.3. ESS Standard Configuration.................................................................................................I-4
5. OPTIONAL PRODUCTS..................................................................................I-5
6. SYSTEM CHARACTERISTICS........................................................................ I-6
6.1 Operation Modes ...................................................................................................................I-6
6.2 Throughput.............................................................................................................................I-7
6.3 FPOT .....................................................................................................................................I-7
6.4 Continuous Printing Speed ....................................................................................................I-7
6.5 Warm-up Time.......................................................................................................................I-8
7. PRINT FUNCTION........................................................................................... I-8
7.1 Image Area ............................................................................................................................I-8
7.2 Internal Fonts.........................................................................................................................I-8
7.3 True Type Fonts...................................................................................................................I-11
8. IMAGE PROCESSING FUNCTIONS............................................................. I-12
8.1 Color/Monochrome Specification.........................................................................................I-12
8.2 Paper Type Selection...........................................................................................................I-12
8.3 Toner Save ..........................................................................................................................I-12
8.4 Color Matching.....................................................................................................................I-12
8.5 Image Adjustment................................................................................................................I-12
8.6 Color Adjustment .................................................................................................................I-12
8.7 Automatic Image Quality Correction....................................................................................I-12
8.8 Recommended Image Quality Modes..................................................................................I-12
8.9 Profile Specification .............................................................................................................I-13
9. IMAGE ADDITION FUNCTION ...................................................................... I-14
9.1 Watermark ...........................................................................................................................I-14
10. PAGE LAYOUT FUNCTIONS...................................................................... I-14
10.1 Reverse Print.....................................................................................................................I-14
10.2 Zoom..................................................................................................................................I-14
10.3 Multiple Page .....................................................................................................................I-14
10.4 Margin Shift........................................................................................................................I-14
10.5 Poster.................................................................................................................................I-14
10.6 Booklet Printing..................................................................................................................I-14

11. PAGE OUTPUT SEQUENCE CONTROL FUNCTIONS .............................. I-14
11.1 Stacking.............................................................................................................................I-14
11.2 Collating.............................................................................................................................I-14
12. SEPARATOR ............................................................................................... I-15
12.1 Banner Sheet.....................................................................................................................I-15
13. JOB CONTROL............................................................................................ I-15
13.1 Print Abortion .....................................................................................................................I-15
13.2 Forced Ejection..................................................................................................................I-15
13.3 Job Timeout.......................................................................................................................I-15
13.4 Job Recovery.....................................................................................................................I-15
14. OTHER FUNCTIONS................................................................................... I-15
14.1 User Job Registration Function..........................................................................................I-15
14.2 Billing Count Function........................................................................................................I-15
14.3 Toner Level Display...........................................................................................................I-15
14.4 Job Log Function ...............................................................................................................I-16
14.5 Reception Limit (IP Filter Function)....................................................................................I-16
15. UTILITY PRINT ............................................................................................ I-16
15.1 Printer Setting List..............................................................................................................I-16
15.2 Panel Setting List...............................................................................................................I-16
15.3 Font List.............................................................................................................................I-16
15.4 Job Log Print......................................................................................................................I-16
15.5 Color Registration Correction Chart...................................................................................I-16
16. HOST INTERFACE...................................................................................... I-17
16.1 Client Hardware.................................................................................................................I-17
16.2 Client OS............................................................................................................................I-17
16.3 Server OS..........................................................................................................................I-17
17. IEEE1284..................................................................................................... I-17
17.1 Connector ..........................................................................................................................I-17
17.2 IEEE1284 Support.............................................................................................................I-17
18. ETHERNET.................................................................................................. I-17
18.1 Connector ..........................................................................................................................I-17
18.2 Printing Protocols...............................................................................................................I-18
18.3 Management Protocols......................................................................................................I-19
18.4 USB....................................................................................................................................I-20
19. UTILITY SOFTWARE................................................................................... I-20
19.1 Printer Drivers/Installers.....................................................................................................I-20
19.2 BLP (LPR)..........................................................................................................................I-20
19.3 BNT (NetBIOS)..................................................................................................................I-20
19.4 BRAdmin Pro.....................................................................................................................I-20
20. PAPER HANDLING...................................................................................... I-21
20.1 Paper Feed........................................................................................................................I-21
20.2 Output Tray........................................................................................................................I-22

20.3 Duplex................................................................................................................................I-22
20.4 Handling of Other Paper....................................................................................................I-22
20.5 Summary of Prohibited Conditions ....................................................................................I-22
21. OPERATING SUPPLY VOLTAGE............................................................... I-23
22. RATED POWER CONSUMPTION............................................................... I-23
23. NOISE.......................................................................................................... I-24
24. FIRMWARE UPDATE FUNCTION............................................................... I-24
25. TOOLS AND SERVICE CONSUMABLES.................................................... I-24
25.1 Tools..................................................................................................................................I-24
25.2 Service Consumables........................................................................................................I-24
26. CONSUMABLES.......................................................................................... I-24
27. SOFTWARE RELATED INFORMATION...................................................... I-25
27.1 Menu Tree (User Mode).....................................................................................................I-25
CHAPTER II INSTALLATION ..........................................................II-1
1. INSTALLATION PROCEDURE....................................................................... II-1
1.1. Checking the Packaged Items.............................................................................................II-2
1.2. Removing the Tapes from the Printer..................................................................................II-3
1.3. Removing the Paper Tray Protective Materials ...................................................................II-4
1.4. Mounting the Print Head Cartridge ......................................................................................II-6
1.5. Mounting the Toner Cartridge..............................................................................................II-9
1.6. Mounting the Transfer Roll Cartridge.................................................................................II-12
1.7. Loading Paper....................................................................................................................II-14
1.8. Connecting the Power Cable.............................................................................................II-18
1.9. Correcting the Color Registrations.....................................................................................II-20
CHAPTER III STRUCTURE OF SYSTEM COMPONENTS.............III-1
1. PRINTING PROCESS.................................................................................... III-1
1.1 Summary of Printing Process ..............................................................................................III-1
1.2 Schematic Diagram for Printing Process.............................................................................III-3
1.3 Description of Printing Process Techniques........................................................................III-4
2. FLOW OF PRINT DATA............................................................................... III-17
2.1 Data Flow...........................................................................................................................III-17
3. DRIVE TRANSMISSION ROUTE................................................................. III-18
3.1 Main Drive ASSY ...............................................................................................................III-18
3.2 DEVE Drive ASSY .............................................................................................................III-19
3.3 Holder Toner Cartridge ASSY (Y, M, C, K)........................................................................III-19
3.4 Fuser Drive ASSY..............................................................................................................III-20
3.5 Motor ASSY DUP...............................................................................................................III-20
3.6 Gear Layout.......................................................................................................................III-21

4. PAPER TRANSFER..................................................................................... III-22
4.1 Paper Transfer Route (without option)...............................................................................III-22
4.2 Layout of Paper Transfer Route.........................................................................................III-23
5. FUNCTIONS OF MAJOR FUNCTIONAL COMPONENTS........................... III-24
5.1 Paper Cassette..................................................................................................................III-25
5.2 Paper Feeder.....................................................................................................................III-26
5.3 Housing ASSY Retard .......................................................................................................III-28
5.4 Front ASSY In....................................................................................................................III-29
5.5 Chute ASSY Out................................................................................................................III-30
5.6 Chute ASSY Exit................................................................................................................III-32
5.7 Transfer Roll Cartridge ASSY & Fuser ..............................................................................III-33
5.8 Xerographics......................................................................................................................III-35
5.9 Toner Cartridge ASSY.......................................................................................................III-37
5.10 Frame & Drive..................................................................................................................III-39
5.11 Electrical ..........................................................................................................................III-40
6. MODES........................................................................................................ III-42
6.1 Print Mode..........................................................................................................................III-42
6.2 Operation Modes ...............................................................................................................III-42
7. CONTROL.................................................................................................... III-43
7.1 Control of Paper Size.........................................................................................................III-43
7.2 Selective Control on Paper Pick-up Unit............................................................................III-43
7.3 Scanner Light Quantity Control..........................................................................................III-43
7.4 Process Control .................................................................................................................III-43
7.5 Color Registration Control..................................................................................................III-47
7.6 Transfer Roll Cartridge Unit ASSY Control........................................................................III-48
7.7 Toner Control.....................................................................................................................III-49
7.8 Fuser Control.....................................................................................................................III-50
CHAPTER IV ASSEMBLY / DISASSEMBLY................................. IV-1
1. BEFORE STARTING DISASSEMBLY...........................................................IV-1
1.1 Precautions......................................................................................................................... IV-1
1.2 Fuser ASSY Removal......................................................................................................... IV-2
1.3 Transfer ASSY Removal..................................................................................................... IV-3
1.4 Controller Board Removal................................................................................................... IV-4
1.5 Description of Procedures...................................................................................................IV-5
2. DISASSEMBLY PROCEDURE......................................................................IV-6
2.1 Cover of the Printer............................................................................................................. IV-6
2.2 Front of the Printer............................................................................................................ IV-16
2.3 Top of the Printer.............................................................................................................. IV-40
2.4 Right / Left / PCBs of the Printer....................................................................................... IV-47
2.5 Paper Feed of the Printer.................................................................................................. IV-58

CHAPTER V TROUBLESHOOTING............................................... V-1
1. PREFACE .......................................................................................................V-1
1.1 Troubleshooting Procedure.................................................................................................. V-1
1.2 Note on Troubleshooting...................................................................................................... V-1
2. LEVEL 1 TROUBLESHOOTING.....................................................................V-3
2.1 Level 1 FIP........................................................................................................................... V-3
3. LEVEL 2 TROUBLESHOOTING.....................................................................V-4
3.1 Fail Code List....................................................................................................................... V-4
3.2 Fail FIP............................................................................................................................... V-14
4. HOW TO USE DIAG. (C/E) MODE................................................................V-39
4.1 Roles of the Control Panel in Diag. (C/E) Mode ................................................................ V-39
4.2 Entering Diag. (C/E) Mode................................................................................................. V-39
4.3 Exiting Diag. (C/E) Mode ................................................................................................... V-39
4.4 Diag. (C/E) Mode Functions............................................................................................... V-39
4.5 Operation Procedure.......................................................................................................... V-40
4.6 Diag. Mode Menu Tree...................................................................................................... V-41
4.7 ESS Diagnosis................................................................................................................... V-43
4.8 IOT Diagnosis.................................................................................................................... V-44
4.9 Installation Setting.............................................................................................................. V-51
4.10 Test Print.......................................................................................................................... V-52
4.11 Parameter Setting............................................................................................................ V-53
4.12 Information Print............................................................................................................... V-55
5. DIAGNOSIS FOR STANDALONE PRINTER................................................V-56
5.1 General.............................................................................................................................. V-56
5.2 Printing Method.................................................................................................................. V-56
5.3 Test Print Pattern............................................................................................................... V-57
6. NVM LIST......................................................................................................V-58
7. HEX/DEC CONVERSION TABLE.................................................................V-67
8. IMAGE QUALITY TROUBLE ENTRY CHART..............................................V-69
9. IMAGE QUALITY SPECIFICATIONS............................................................V-70
9.1 Parallelism ......................................................................................................................... V-70
9.2 Diagonal............................................................................................................................. V-70
9.3 Skew.................................................................................................................................. V-70
9.4 Straightness....................................................................................................................... V-71
9.5 Magnification Error............................................................................................................. V-71
9.6 Registration........................................................................................................................ V-71
9.7 Guaranteed Printing Area .................................................................................................. V-72
10. TEST PRINT ...............................................................................................V-73
10.1 Test print.......................................................................................................................... V-73

11. IMAGE QUALITY FIP..................................................................................V-74
11.1 Notes on Image Quality Trouble Check........................................................................... V-74
11.2 Basic Rule of Image Quality Adjustment.......................................................................... V-74
11.3 Troubleshooting Table by Trouble Phenomena............................................................... V-75
CHAPTER VI DIAGRAMS.............................................................. VI-1
1.PREFACE .......................................................................................................VI-1
1.1 How to Use the BSD........................................................................................................... VI-1
1.2 Explanations of Symbols.....................................................................................................VI-1
1.3 Signal Name ....................................................................................................................... VI-4
1.4 DC Voltage.......................................................................................................................... VI-4
1.5 Input/Output Test................................................................................................................ VI-4
2. BSD (BLOCK SCHEMATIC DIAGRAM)

CHAPTER VII PLUG/JACK (P/J) CONNECTOR LOCATIONS.... VII-1
1. LIST OF P/J...................................................................................................VII-1
1.1 Base Engine....................................................................................................................... VII-1
1.2 2 Tray Module.................................................................................................................... VII-3
2. P/J LAYOUT DIAGRAM................................................................................VII-4
2.1 IOT Top.............................................................................................................................. VII-4
2.2 IOT Front/RH ..................................................................................................................... VII-5
2.3 MCU and HVPS PWB/ESS PWB....................................................................................... VII-6
2.4 Tray 1................................................................................................................................. VII-7
2.5 2 Tray Module.................................................................................................................... VII-8


i
REGULATIONS
LASER SAFETY (FOR 120 V MODEL ONLY)
This printer is certified as a Class I 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. This means that the printer does not produce
hazardous laser radiation.
Since radiation emitted inside the printer is completely confined within protective housings
and external covers, the laser beam cannot escape from the machine during any phase of
user operation. However, the machine contains 5-milliwat, 700-800 nanometer wavelength,
GaAIAs laser diodes. Direct (or indirect reflected) eye contact with the laser beam might
cause serious eye damage. Safety precautions and interlock mechanisms have been
designed to prevent any possible laser beam exposure to the operator.
FDA REGULATIONS (FOR 120 V MODEL ONLY)
U.S. Food and Drug Administration (FDA) has implemented regulations for laser products
manufactured on and after August 2, 1976. Compliance is mandatory for products
marketed in the United States. The label shown on the back of the printer indicates
compliance with the FDA regulations and must be attached to laser products marketed in
the United States.
Caution:
Use of controls, adjustments or the performance of procedures other than those specified
in this manual may result in hazardous radiation exposure.
MANUFACTURED:
BROTHER INDUSTRIES, LTD.
15-1 Naeshiro-cho, Mizuho-ku, Nagoya, 467-8561 Japan
This product complies with FDA radiation performance standards, 21 CFR
Subchapter J.

i
i
IEC 60825 SPECIFICATION (FOR 220-240 V MODEL ONLY)
This printer is a Class 1 laser product as defined in IEC 60825 specifications. The label
shown below is attached in countries where required.
CLASS 1LASER PRODUCT
APPAREIL Å LASER DE CLASSE 1
LASER KLASSE 1 PRODUKT
This printer has a Class 3B Laser Diode which emits invisible laser radiation in the Scanner
Unit. The Scanner Unit should not be opened under any circumstances.
Caution: Use of controls, adjustments or the performance of procedures other than
those specified in this manual may result in hazardous radiation exposure.
For Finland and Sweden
LUOKAN 1 LASERLAITE
KLASS 1 LASER APPARAT
Varoitus! Laitteen käyttäminen muulla kuin tässä käyttöohjeessa mainitulla tavalla saattaa
altistaa käyttäjän turvallisuusluokan 1 ylittävälle näkymättömälle lasersäteilylle.
Varning – Om apparaten används på annat sätt än i denna Bruksanvisning specificerats,
kan användaren utsättas för osynlig laserstrålning, som överskrider gränsen för laserklass
1.
Internal laser radiation
Max. Radiation Power 10 mW
Wave Length 770 nm-808 nm
Laser Class Class IIIb (Accordance with 21 CFR Part 1040.10)
Class 3B (Accordance with IEC60825)

i
ii
SAFETY
To prevent possible accidents during maintenance operation, you should observe strictly
the "Warning" and "Caution" information in this manual.
Dangerous operations and operations out of range of this manual should be absolutely
avoided.
Generally various processes not covered by this manual may be required in actual
operation, which should be performed carefully always giving attention to safety.
Caution
Use of controls or adjustment or performance of procedures other than those specified in
this manual might result in hazardous radiation exposure.
Disconnect device
This printer must be installed near a power outlet that is easily accessible. In case of
emergencies, you must disconnect the power cord from the power outlet to shut off the
power completely.
Caution for batteries
Do not replace the battery. There is a danger of explosion if the battery is incorrectly
replaced. Do not disassemble, recharge or dispose of inby fire. Used batteries should be
disposed of according to local regulations.

i
v
Power Source
Keep the power supply off during maintenance operation to prevent electric shock, burns
and other damages. Keep the power plug disconnected during the maintenance operation.
If the power supply should be kept connected for measurement of voltage or other similar
reasons, sufficient care should be given to prevent electric shock, by following the
procedures of this manual.
WARNING
While the printer is ON, never touch live parts if not required absolutely.
WARNING
Power is supplied to the power switch / inlet (LVPS ASSY) even while the printer is off.
Never touch its live components.
WARNING
Do not touch live parts unless otherwise specified.
Driving Units
When servicing gears or other driving units, be sure to turn them OFF and plug off. Drive
them manually when required.
WARNING
Never touch the gears or other driving units while the printer is running.

v
High-temperature Units
When servicing high-temperature units (securing unit, etc.), be sure to turn them OFF to
prevent burns, injuries and other troubles, remove the power plug and start service
processes after they have cooled down enough.
WARNING
Immediately after completion of operation, they are still hot. Start services after more than
40 minutes.
Laser Beams
WARNING
N If your eyes are exposed to laser beams, you may lose your eyesight.
N Never open the cover if warning label for laser beams is attached there.
N Before disassembling and reassembling this laser printer, be sure to turn it OFF.
N When servicing this laser printer while it is running, be sure to follow the procedures
specified in this manual.
N You should understand the features of the laser beams which are capable of having an
injurious action on the human body, not to extend the danger over the workers as well
as other people around the printer.
Note:
I Laser beams have features as follows:
x
Frequencies are smaller in width than other beams (sun and electric bulbs) and phases
are uniform so that high monochromatic and convergence performance can be obtained
and thin beams of light can reach places at a long distance.
x
Due to the high convergence, beams are concentrated in high density and high
temperature, which is dangerous to human body.
Reference: Laser beams of this laser printer is invisible rays which you cannot see.
Print Head Cartridge ASSY
S
canner ASSY

v
i
Warning/Caution Labels
Warning labels and caution labels are attached to this laser printer to prevent accidents
check those labels for their peeling or stain when servicing the printer.
< Caution label for high-temperature units >
Unpacking the Printer
WARNING
The printer must be carried horizontally with two or more persons.
CAUTION
Extreme care must be taken to avoid personal injuries.
Check visually the printer for evidence of any damages.
Peel all tapes off the printer.
Remove protection parts (2 pieces) from the paper tray.

v
ii
ACRONYMS
In this manual, the manual specific acronyms are used in addition to the generally used
ones. The table below contains typical acronyms that are used throughout this manual.
ADC Automatic Density Control AG Analog Ground
AUX. Auxiliary B/W Black and White
BCR Bias Charge Roll CART. Cartridge
BUR Back Up Roll CL. Clutch
CCW Counter Clock Wise CLK Clock
CLN Cleaning (or Cleaner) CRU Customer Replaceable Unit
CR Charge Roll CW Clock Wise
CRUM CRU Monitor DTS Detack Saw
DB Developing Bias FDR Feeder
FG Frame Ground FRU Field Replaceable Unit
Hex Hexadecimal I/F Interface
IDT Intermediate Drum Transfer ID Image Density
(or Identification)
L/H Left Hand L/P Low Paper
LD Laser Diode LEF Long Edge Feed
MSI Multi Sheet Inserter N/F Normal Force
N/P No Paper NVM Non Volatile Memory
OPC Organic Photo Conductor P/H Paper Handling
PCDC Pixel Count Dispense Control PPM Prints Per Minute
Pixel Picture Cell PWB Printed Wiring Board
PV Print Volume REGI. Registration
R/H Right Hand RTN Return
SEF Short Edge Feed SG Signal Ground
SNR Sensor SOL. Solenoid
SOS Start Of Scan SPI Scans Per Inch
SYNC. Synchronous T/A Take Away
TC Toner Concentration TEMP. Temperature
TR Transfer TRANS. Transport
WDD Wide Range Dynamic Damper YMCBk Yellow, Magenta, Cyan, Black
XERO. Xerographic

v
iii
Service call procedures
1. Notes Before Work
1.1 Safety notes
To prevent an accident during maintenance, follow warnings and precautions strictly.
Avoid dangerous work.
1. Power supply
To prevent an electric shock, burn, or injury, turn off the power and unplug the
power cable before maintenance work. If it is inevitable to keep the power on for
voltage measurement, take the greatest care not to receive an electric shock.
2. Drive
Never inspect or lubricate drive components such as gears when the machine is in
operation.
3. Heavy parts
The machine weighs 35.3 kg. When lifting the machine, get a firm footing and
bend your knees to avoid possible injuries to your back.
4. Safety devices
Ensure the safety functions of safety devices for preventing mechanical accidents
(fuses, circuit breakers, and interlock switches) and for safe user operations
(panels and covers). Do not make mechanical alterations that may impair the
safety functions.
5. Parts mounting and removal
Parts and covers may have sharp edges. Do not touch the edges readily. If your
fingers or hands become greasy, wipe off the grease well. Do not pullout a part
cable forcibly but gradually.
6. Specified tool
Follow instructions if a tool is specified.
7. Organic solvents
Use the drum cleaner and other organic solvents carefully with the following notes
in mind:
x
Keep the room well ventilated not to breathe in vapor a lot or continuously.
x
The solvents are inflammable liquids. Do not put them close to or into a fire or
do not heat their containers.
x
Avoid storing the solvents near a naked fire or sparks because they may catch
fire.
8. Irregular use of machine
When altering the machine, submit an application for irregular use in advance.

i
x
1.2 Other notes
Do maintenance work correctly and efficiently with the following notes in mind:
1. Reference materials
Read the related technical information (SB, FTI, FTO and so on) well and do
maintenance work systematically.
2. Disassembling
Before removing parts for disassembling, check the normal mounting status in
advance.
3. Mounting and adjustment
Do not start up the machine immediately after finishing part mountings and
adjustments. Check that there are no tools or parts left inside the machine or on
assy.
4. Handling of replaced parts and consumables
Do not discard of replaced parts and consumables at the customer site.
After replacing the following consumables, be sure to attach the U tag to the
replaced one and recover.
Drum cartridge
Color toner cartridges
As to parts to be recycled, enter necessary data into the U tag and recover the
parts.
5. General Notes
Be careful not to disturb the customer's daily work.
Color toner dropped on the floor is hardly cleaned. Place the drop cloth on the
floor when maintaining the inside of the machine to protect carpets and floors.
Puts wastes, consumables, and replaced parts into a plastic or paper bag and
obtain the permission of the customer to throw them away.
Be sure to enter the field work contents and the replaced consumables and parts
into the Machine Log Book.
HL-4000CN weighs 35.3 kg.
When moving the equipment, make sure that there are two or more persons carrying it.
For details, see the installation procedure on page II-1.

x
2. Workflow in the Field
< Initial Actions >
1. Question the Customer for details about the system malfunction.
2. Note down the meter count.
3. Inspect the rejected print and determine the machine condition.
4. Check the Machine Log Book.
< For UM visit >
1. Perform the Level 1 troubleshooting.
2. Perform the troubleshooting.
3. Print any Internal Test Pattern to check the print quality. (See page V-51)
4. Feed paper from each tray, and clean or replace the feed role as required.
5. Repair any secondary problems that would prevent the machine from running.
6. Perform the trim activities.
< For SM visit >
1. Print any Internal Test Pattern to check the print quality. (See page V-51)
2. Feed paper from each tray, and clean or replace the feed role as required.
3. Repair any secondary problems that would prevent the machine from running.
4. Perform the trim activities.
< Final Actions >
1. Check the machine overall operation and function.
2. Check the machine appearance and consumables.
3. Perform the operator training as required.
4. Record the performed action in the Machine Log Book and Service Report.
5. Store the sample printouts in the Machine Log Book.

x
i
3. Trim Activity
Trim activities for HL-4000CN should be made within every SM/UM, mainly for
maintaining the machine performance. There is no service call performed only for the
trim activity.
3.1 Trim activity procedure
1. Check the overall operation before performing the trim activity.
Print any Internal Test Pattern to output three patterns: all colors of 20 % each,
halftone and grid.
All colors of 20 % each: IBT belt, scratches on the drum surface, and fusing
problem are checked.
Halftone pattern: Low density area reproduction problem, color balance and fusing
problem are checked.
Grid pattern: Color registration problem and fusing problem are checked.
* See page V-51 for test pattern output method.
2. Clean the interior of the machine.
Clean toner contamination and paper dust in the paper path area.
(Operator area should be cleaned carefully.)
3. Check the periodic replacement parts(consumable parts). Replace as required.
4. Safety check.
Check the Power Cord for damage or loose connection.
5. After 1 to 4 above completes, do the following overall operation checks.
Machine operation
Print quality
Meter reading
3.2 Mechanical consumables and periodic replacement parts
A mechanical consumable should be replaced after checking the printed sheets
count during trim action.
<Mechanical consumables>
Consumable Product Code Number of sheets that can be
printed*1
Black Toner Cartridge TN-11BK 8.5K
Cyan Toner Cartridge TN-11C 6K
Magenta Toner Cartridge TN-11M 6K
Yellow Toner Cartridge TN-11Y 6K
Print Head Cartridge PH-11CL 30K
Transfer Roll Cartridge
(with Toner Collector Bottle) TR-11CL 25K
*1: Condition
Paper size: A4 or LETTER
Toner coverage: 5%
Ratio of B/W to color: 1: 1
Average number of sheets printed at onetime: 4 sheets
<Parts for periodic replacement>
Consumable Replacement interval Remarks
Fuser Unit 100K prints
Retard Roll 100K prints