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Brother ds640 Mobile Document Scanner Manual


Brother ds640 Mobile Document Scanner Manual

Brother ds640 Mobile Document Scanner Manual product img

Unpack the scanner and check the components

The components included in the box may differ depending on your country. Remove the protective tape and film covering the scanner.

This product is packaged in a plastic bag. To avoid suffocation, keep plastic bags away from babies and children. The bag is not a toy.


  • We recommend saving the original packaging in case you must ship your scanner.
  • To establish a local connection to a computer, use the supplied micro USB 3.0 cable.

SecureZ Network Access

Your machine’s default password is on the label at the bottom of the scanner (preceded by “Pwd”). We strongly recommend you change it to protect your machine from unauthorized access.

 Connect your scanner to the computer

DSmobile DS-640/DS-740D
Connect your scanner to the computer using the supplied USB cable.

Brother ds640 Mobile Document Scanner fig 1

DSmobile DS-940DW

  1. Connect your scanner to the computer using the supplied USB cable.
  2. Wait until the scanner’s built-in battery is fully charged (the Battery LED blinks in green) before you use the scanner.

Insert the microSD memory card into the scanner (optional) (DSmobile DS-940DW only)

If you plan to save files to a microSD memory card (purchased separately), gently insert the card into your scanner’s memory card slot with the printed side facing downwards.

Brother ds640 Mobile Document Scanner Manual fig 2

Using your scanner with your computer

Make sure that you are logged on with Administrator rights.

Mac and Windows computers

When finished, restart your computer. To scan using your computer, install the software supplied with your scanner. For more information, see the Online User’s Guide.

Symbols and conventions used in this guide

The following symbols and conventions are used throughout this guide:

DANGER indicates an imminently hazardous situation which, if the product is handled without following the warnings and instructions, will result in death or serious injuries.

CAUTION indicates a potentially hazardous situation that, if not avoided, may result in minor or moderate injuries.

IMPORTANT indicates a potentially hazardous situation that, if not avoided, may result in damage to property or loss of product functionality.

NOTE tells you how you should respond to a situation that may arise or give tips about other scanning features.

  • Prohibition icons indicate actions that must not be performed.
  • This icon indicates that flammable sprays may not be used.
  • This icon indicates that organic solvents, such as alcohol or other liquids, may not be used.
  • Electrical Hazard icons alert you to possible electrical shocks.
  • Fire Hazard icons alert you to the possibility of fire.

Compilation and Publication Notice

This manual has been compiled and published to provide the latest product safety information at the time of publication. The information contained in this manual may be subject to change. For the latest manual, please visit us at

Choose a safe location for the scanner
Put the scanner on a flat, stable surface that is free from shocks and vibrations, such as a desk. Choose a dry, well-ventilated location where the temperature remains between 5°C and 35°C and the humidity are between 20% to 80% (without condensation).

Brother ds640 Mobile Document Scanner Manual fig 3


(DSmobile DS-940DW only) Use the rechargeable Li-ion battery only for its intended purpose. (DSmobile DS-940DW only) To charge the rechargeable Li-ion battery, connect your scanner to your computer using the supplied Micro USB cable.


Never insert any objects into the slots in the scanner’s casing, since they may touch dangerous voltage points or short out parts resulting in the risk of fire or electrical shock. If metal objects, water, or other liquids get inside the scanner, immediately unplug the scanner from the power source. Contact your Brother dealer or Brother customer service. Plastic bags are used in the packaging of the scanner. To avoid the danger of suffocation, keep them away from babies and children. Plastic bags are not toys.

DO NOT place the scanner near radiators, heaters, air conditioners, water, chemicals, or devices that contain magnets or generate magnetic fields. Doing so may create the risk of a short circuit or fire should water come into contact with the scanner (including condensation from heating, air conditioning, and/or ventilation equipment that may be sufficient to create a short circuit or fire).


Avoid placing the scanner in a high-traffic area. If you must place it in a high-traffic area, ensure that the scanner is in a safe location where it cannot be accidentally knocked over, which could cause injury to you or others and serious damage to the scanner. Make sure that no part of the scanner protrudes from the desk or stand where the scanner is located. Make sure that the scanner is located on a flat, level, and stable surface free from vibration. Failure to observe these precautions could cause the scanner to fall, causing an injury.

DO NOT place the scanner on an unstable or tilted cart, stand, or table, or on any tilted/slanted surface. The scanner may fall, causing injury to you and serious damage to the scanner. There is an added risk of injury if the scanner glass should break. Do not place heavy objects on the scanner. It may cause unbalance and the scanner may fall down. This may result in injury.


Do not use the scanner in locations where temperature changes are extreme. The resulting condensation may result in scanner failure or malfunction. If condensation forms, wait until it dries completely before using the scanner again.  If the scanner does not operate normally when the operating instructions are followed, adjust only those controls that are covered by the operating instructions. Incorrect adjustment of other controls may result in damage, and will often require extensive work by a qualified technician to restore the scanner to normal operation.

Rechargeable Li-ion battery (DSmobile DS-940DW only)

  • At the time of purchase, the rechargeable Li-ion battery is slightly charged so that the operation of the scanner can be verified; however, the rechargeable Li-ion battery should be fully charged via the USB port before the scanner is used.
  •  If the scanner will not be used for a long period of time, store it in a location where it is not exposed to high humidity or high temperatures (temperatures between 15°C and 25°C and humidity between 40% and 60% are recommended). In order to maintain the efficiency and life of the rechargeable Li-ion battery, charge it at least every three months.
  •  If you notice anything unusual about the rechargeable Li-ion battery the first time it is used, for example, overheating or rust, DO NOT continue to use the battery. Contact your Brother dealer or Brother customer service.

Servicing the scanner

DO NOT attempt to service the scanner yourself. Opening or removing covers may expose you to dangerous voltages and other risks and may void your warranty. Contact your Brother dealer or Brother customer service.


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