Brother 7840 W User Guide

							Safety and legal81
A
Important informationA
Safety precautionsA
Please read these instructions before attempting any maintenance, and keep them for later 
reference. When using your telephone equipment, follow basic safety precautions to reduce the 
risk of fire, electric shock or personal injury.„ DO NOT use this product near wa ter, or in a damp environment.
„ Avoid using this product during an electrical st orm. There may be a remote risk of electric 
shock from lightning.
„ We DO NOT advise using an extension lead.
„ Never install telephone wiring during a lightning  storm. Never install a telephone wall socket in 
a wet location. 
„ If any cables become damaged, disconnect your machine, and contact your Brother dealer.
„ DO NOT place any objects on the machine, or obstruct the air vents.
„ This product should be connected to an adjace nt grounded AC power source within the range 
indicated on the rating label. DO NOT connect it to a DC power source or inverter. If you are 
not sure, contact a qualified electrician.
„ DO NOT dispose of batteries in a fire. They  may explode. Check with local codes for possible 
special disposal instructions. 
						

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WARNING 
Before cleaning the inside of the machine, first 
unplug the telephone line cord, and then the power 
cord from the electrical socket.
 
DO NOT handle the plug with wet hands. Doing 
this might cause an electrical shock.
 
Always make sure the plug is fully inserted.
After you have just used the machine, some 
internal parts of the ma chine will be extremely hot. 
When you open the front or back cover of the 
machine, DO NOT touch the shaded parts shown 
in the illustration.
 
To prevent injuries, be  careful not to put your 
hands on the edge of the machine under the 
document cover or scanne r cover as shown in the 
illustrations.
 
To prevent injuries, DO NOT put your fingers in the 
areas shown in the illustrations.
  
						

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Note
The fuser unit is marked with a caution label. Please DO NOT remove or damage the label.
 
 
DO NOT use a vacuum cleaner to clean up scattered toner. Doing this might cause the toner 
dust to ignite inside the vacuum cleaner, pote ntially starting a fire. Please carefully clean the 
toner dust with a dry, lint-free cloth and di spose of it according to local regulations.
If moving your machine, use the handholds provided. First making sure to disconnect any 
cables.
DO NOT use any flammable substances, spray or 
organic solvent/liquids containing 
alcohol/ammonia to clean the inside or outside of 
the machine. Doing this may cause a fire or 
electrical shock. Refer to  Routine maintenance 
on page 114 for how to clean the machine.
 
Plastic bags are used in the packaging of your  machine. To avoid the danger of suffocation, 
keep these bags away from babies and children. 
						

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IEC60825-1+A2:2001 SpecificationA
This machine is a Class 1 laser product as de fined in IEC60825-1+A2:2001 specifications. The 
label shown below is attached in countries where required.
Internal laser radiationA
Wave length: 780 - 800 nm
Output: 10 mW max.
Laser Class: Class 3B
WARNING 
Use of controls, adjustments or performance of  procedures other than those specified in this 
manual may result in hazardous radiation exposure.
 
Disconnect deviceA
This product must be installed near an electrical  socket that is easily accessible. In case of 
emergencies, you must disconnect the power cord  from the electrical socket to shut off power 
completely.
Wiring information (U.K. only)A
If you need to replace the plug fuse, fit a fuse  that is approved by ASTA to BS1362 with the same 
rating as the original fuse.
Always replace the fuse cover. Never use a plug th at does not have a cover. If in any doubt, call 
a qualified electrician. 
Warning - This printer must be earthed.
The wires in the mains lead are colour ed in line with the following code:
„ Green and Yellow: Earth
„ Blue: Neutral
„ Brown: Live
This machine 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.
 
CLASS 1 LASER PRODUCT
APPAREIL À LASER DE CLASSE 1
LASER KLASSE 1 PRODUKT 
						

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LAN connection (MFC-7440 N and MFC-7840W only)A
CAUTION 
DO NOT connect this product to a LAN connection that is subject to over-voltages.
 
Radio interferenceA
This product complies with EN55022 (CISPR Pu blication 22)/Class B. When connecting the 
machine to a computer, ensure that you use the following interface cables.
A USB cable which must not exceed 2.0 metres in length.
EU Directive 2002/ 96/EC and EN50419A
 
This equipment is marked with the above recycling symbol. It means that at the end of the life of 
the equipment you must dispose of it separately at an appropriate collection point and not place 
it in the normal domestic unso rted waste stream. This will benefit the environment for all. 
(European Union only) 
						

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International ENERGY STAR® Compliance StatementA
The purpose of the International ENERGY STAR® Program is to promote the development and 
popularization of energy-eff icient office equipment.
As an ENERGY STAR
® Partner, Brother Industries, Ltd. ha s determined that this product meets 
the ENERGY STAR
® guidelines for energy efficiency.
 
Important safety instructionsA
1 Read all of these instructions.
2 Save them for later reference.
3 Follow all warnings and instru ctions marked on the product.
4 Unplug this product from the wall socket before cleaning inside of the machine. DO NOT use  liquid or aerosol cleaners. Use a damp cloth for cleaning.
5 DO NOT place this product on an unstable cart, st and, or table. The product may fall, causing 
serious damage to the product.
6 Slots and openings in the casing at the back or  bottom are provided for ventilation. To ensure 
reliable operation of the product and to protect it from overheating, these openings must not 
be blocked or covered. The openings should neve r be blocked by placing the product on a bed, 
sofa, rug, or other similar surface. This product should never be placed near or over a radiator 
or heater. This product should never be placed  in a built-in installation unless adequate 
ventilation is provided.
7 This product should be connected to an AC pow er source within the range indicated on the 
rating label. DO NOT connect it to a DC power so urce or inverter. If you are not sure, contact 
a qualified electrician.
8 This product is equipped with  a 3-wire grounded plug. This plug will only fit into a grounded 
power outlet. This is a safety fe ature. If you are unable to insert the plug into the outlet, call 
your electrician to replace your obsolete outl et. DO NOT defeat the purpose of the grounded 
plug.
9 Use only the power cord  supplied with this machine.
10 DO NOT allow anything to rest on the power  cord. DO NOT place this product where people 
can walk on the cord. 
						

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11 The power cord, including extensions should be no longer than 5 metres.DO NOT share the same power circuit with other high powered appliances, such as an air 
conditioner, copier, shredder or similar devices. If you cannot avoid using the printer with these 
appliances, we recommend that you use a high-frequency noise filter.
Use a voltage regulator if th e power source is not stable.
12 DO NOT place anything in front of the machin e that will block received faxes. DO NOT place 
anything in the path of received faxes.
13 Wait until pages have exited the machine before picking them up.
14 Unplug this product from the power socket and  refer all servicing to Brother Authorized Service 
Personnel under the following conditions:
„ When the power cord is damaged or frayed.
„ If liquid has been spilled into the product.
„ If the product has been exposed to rain or water.
„ If the product does not operate normally when the operating instructions are followed. 
Adjust only those controls that are cover ed by the operating instructions. Incorrect 
adjustment of other controls  may result in damage and will ofte n require extensive work by 
a qualified technician to restore the product to normal operation.
„ If the product has been dropped or the casing has been damaged.
„ If the product exhibits a distinct change in performance, indicating a need for service.
15 To protect your product against power surges , we recommend the use of a power protection 
device (Surge Protector).
16 To reduce the risk of fire, electric s hock and injury to people, note the following:
„ DO NOT use this product near appliances that  use water, a swimming pool or in a wet 
basement.
„ DO NOT use the machine  during an electrical storm (there  is the remote possibility of an 
electrical shock) or to report a ga s leak in the vicinity of the leak. 
						

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TrademarksA
The Brother logo is a registered trademark of Brother Industries, Ltd.
Brother is a registered trademark of Brother Industries, Ltd.
Multi-Function Link is a registered trademark of Brother International Corporation.
Windows Vista is either a registered trademark or a trademark of Microsoft Corporation in the 
United States and other countries.
Microsoft, Windows and Windows Server are registered trademarks of Microsoft Corporation in 
the United States and/or other countries.
Macintosh and TrueType are registered trademarks of Apple Inc.
PostScript is a registered trademark and PostScript 3 is a trademark of Adobe Systems 
Incorporated.
Nuance, the Nuance logo, PaperPort and ScanSoft are trademarks or registered trademarks of 
Nuance Communications, Inc. or  its affiliates in the United States and/or other countries.
Presto! PageManager is a registered trademark of NewSoft Technology Corporation.
BROADCOM, SecureEasySetup and the SecureEasySetup logo are trademarks or registered 
trademarks of Broadcom Corporation in the United States and/or other countries.
AOSS is a trademark of Buffalo Inc.
Wi-Fi, WPA and WPA2 are registered trademarks and Wi-Fi Protected Setup is a trademark of 
Wi-Fi Alliance.
Java and all Java-based trademarks and logos are trademarks or registered trademarks of Sun 
Microsystems, Inc. in the United States and other countries.
Each company whose software title is mentio ned in this manual has a Software Licence 
Agreement specific to its proprietary programs.
All other brand and product names mentioned in this User’s Guide are registered 
trademarks of their respective companies. 
						

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B
B
TroubleshootingB
If you think there is a problem with your machine, check the chart below and follow the 
troubleshooting tips.
Most problems can be easily resolved by your self. If you need additional help, the Brother 
Solutions Center offers the latest FAQs and troubleshooting tips. Visit us at 
http://solutions.brother.com/
.
If you are having diffic ulty with your machineB
If you think there is a problem with the way your fa xes look, make a copy first. If the copy looks 
good, the problem may not be your machine. Check the chart below and follow the troubleshooting 
tips.
Troubleshooting and routine 
maintenance
B
Printing or receiving faxes
DifficultiesSuggestions
„ Condensed print
„ Horizontal streaks
„ Top and bottom sentences are 
cut off
„ Missing lines Usually this is caused by a poor te
lephone connection. If your copy looks good, 
you probably had a bad connection, with st atic or interference on the telephone 
line. Ask the other party to send the fax again.
Poor print quality See Improving the print quality  on page 96.
Vertical black lines when receiving The corona wire  for printing may be dirty. Clean the corona wire. (See Cleaning 
the corona wire  on page 118.)
The sender’s scanner may be dirty. Ask the sender to make a copy to see if the 
problem is with the sending machine. Tr y receiving from another fax machine. 
If the problem continues, call your Brother dealer for service.
Received faxes appear as split or 
blank pages. If the received faxes are divided and printed on two pages or if you get an extra 
blank page, your paper size setting may not be correct for the paper you are using. 
(See 
Paper size  on page 21.) 
Turn on auto reduction. (See  Printing a reduced incoming fax  on page 42.)
Telephone line or connections
DifficultiesSuggestions
Dialling does not work. Check for a dial tone.
Change  Tone/Pulse  setting. (See  the Quick Setup Guide .)
Check all line cord connections.
Check that the machine is plugged in and switched on.
If an external phone is connected to the ma chine, send a manual fax by lifting the 
handset of the external telephone and dialling the number. Wait to hear fax 
receiving tones before pressing  Start. 
						

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The machine does not answer 
when called.Make sure the machine is in the correct receive mode for your setup. (See 
Receiving a fax
 on page 39.) Check for a dial tone.  If possible, call your machine 
to hear it answer. If there is still no answer, check the telephone line cord 
connection. If you do not hear ringing when  you call your machine, ask your 
telephone company to check the line.
Sending faxes
DifficultiesSuggestions
Poor sending quality. Try changing your resolution to Fine or S.Fine . Make a copy to check your 
machine’s scanner operation. If the copy quality is not good, clean the scanner. 
(See  Cleaning the scanner glass  on page 115.)
Transmission Verification Report 
says ‘RESULT:ERROR’. There is probably temporary noise or static on the line. Try sending the fax again. 
If you are sending a PC Fax message and get ‘RESULT:ERROR’ on the 
Transmission Verification Report, your ma
chine may be out of memory. To free up 
extra memory, you can turn off fax storage (see  Turning off remote fax options 
on page 58), print fax messages in memory (see  Printing a fax from the memory 
on page 43) or cancel a delayed fax or polling job (see  Checking and cancelling 
waiting jobs  on page 38). If the problem continues, ask the telephone company to 
check your telephone line.
If you often get transmission errors due to  possible interference on the telephone 
line, try changing the Compatibility setting to  Basic(for VoIP)(For 
MFC-7840W,  Normal or Basic(for VoIP) ). (See Telephone line interference  
on page 102.)
Vertical black lines when sending. Black ve rtical lines on faxes you send are typically caused by dirt or correction fluid 
on the glass strip. (See  Cleaning the scanner glass on page 115.)
Handling incoming calls
DifficultiesSuggestions
The machine ‘Hears’ a voice as a 
CNG Tone. If Fax Detect is set to on, your machine is more sensitive to sounds. It may 
mistakenly interpret certain voices or mu
sic on the line as a fax machine calling 
and respond with fax receiving tones. De activate the machine by pressing 
Stop/Exit . Try avoiding this problem by  turning Fax Detect to off. (See  Fax Detect 
on page 41.)
Sending a Fax Call to the machine. If you answered on an ex ternal or extension telephone, press your Remote 
Activation code [default setting is ( l 51)]. When your machine answers, hang up.
Custom features on a single line. If you have Call Waiting, Call Waiting/Caller ID, Caller ID, Voice Mail, an  answering machine, an alarm system or other custom feature on a single 
telephone line with your machine, it may  create a problem sending or receiving 
faxes.
For Example:  If you subscribe to Call Waiting or some other custom service and 
its signal comes through the line while your  machine is sending or receiving a fax, 
the signal can temporarily interrupt or disrupt the faxes. Brother’s ECM feature 
should help overcome this problem. This  condition is related to the telephone 
system industry and is common to all dev ices that send and receive information 
on a single, shared line with custom feat ures. If avoiding a slight interruption is 
crucial to your business, a separate li ne with no custom features is recommended.
Telephone line or connections (continued)
DifficultiesSuggestions