Panasonic EW-DE92 User Manual

BC

Contents

(Household)

Operating Instructions

Sonic Vibration Toothbrush

Model No.

EW‑DE92

Safety precautions..................3

Parts identication ..........................6

Storing and charging the toothbrush

...........................................................7

Before cleaning your teeth .............8

Using the toothbrush ....................10

Tips on usage ................................11

How to clean ..................................13

Thank you for purchasing this Panasonic product.

Before operating this unit, please read these instructions completely and save them for future use.

Frequently Asked Questions

(Ion lamp) .......................................14

Troubleshooting ............................15

Battery life ......................................17

Removing the built-in rechargeable
battery

Specications ................................17

Changing the brush head

(Sold separately)............................18

.............................................17

1

IMPORTANT SAFEGUARDS

When using electrical products when children are
present, basic safety precautions should always
be followed including the following:

READ ALL INSTRUCTIONS BEFORE USING

DANGER

In order to reduce the risk of electrocution:

1. Do not place or store the charger where it can
fall or be pulled into a tub or sink.

2.

Do not place the charger in water or other liquid.

3. Do not reach for a charger that has fallen into
water. Unplug immediately.

4. Do not wash the charger.

5. Do not use while bathing.

WARNING

To reduce the risk of burns, electrocution, fire
or injury to persons:

1. This appliance is not intended for use by
children or persons with reduced physical or
mental capabilities, unless they are supervised
by a person responsible for their safety.

2.

Use this product only for its intended use as
described in this manual. Do not use attachments
not recommended by the manufacturer.

3. Keep cord away from heated surfaces.

4. Never drop the appliance or insert any object
into any opening of the appliance.

5. Never operate this product if it has been
dropped or damaged, or if it is not working
properly. If any of these occur, please contact a
service center and return the product for
examination and repair.

6. If the product is dropped, the brush head
should be replaced before the next use even if
no damage is visible.

7. This appliance is provided with a charger with
integrated Safety Extra Low Voltage power
supply. Periodically check the charger for
damage. A damaged or non‑functioning
appliance should no longer be used. Take it to a
service center.

8. Never use while drowsy.

9. Do not use outdoors or operate where aerosol
(spray) products are being used or where
oxygen is being administered.

IMPORTANT

1. Do not touch the power plug with wet hands.
This can cause an electric shock.

2. When unplugging, always hold the power plug
instead of the cord.

2

3. Do not modify the product. Do not disassemble
or repair. This may cause fire, electric shock or
injury. Consult your dealer for repairs or contact
a service center. Do not disassemble the
product except when disposing of the battery.

4. When taking out the battery for disposal, use
caution not to short the positive (+) and
negative (–) terminals.

5. This product is not intended for use by children.

Safety precautions

To reduce the risk of injury, loss of life, electric shock, fire,
malfunction, and damage to equipment or property, always
observe the following safety precautions.

Explanation of symbols

The following symbols are used to classify and describe the level
of hazard, injury, and property damage caused when the
denotation is disregarded and improper use is performed.

CAUTION

If you are undergoing treatment for any oral care
condition, consult your dental professional prior to use.

SAVE THESE INSTRUCTIONS

The following symbols are used to classify and describe the type
of instructions to be observed.

Denotes a potential

DANGER
WARNING
CAUTION

This symbol is used to alert users to a specific operating
procedure that must not be performed.

This symbol is used to alert users to a specific operating
procedure that must be followed in order to operate the
unit safely.

hazard that will result in
serious injury or death.

Denotes a potential
hazard that could result
in serious injury or death.

Denotes a hazard that
could result in minor injury.

3

DANGER

To prevent the potential risk of interference, do not
use this toothbrush near the vicinity of electronic
medical devices or home electrical therapy devices
such as the following:

• Pacemakers and other electronic medical devices
implanted in the body

• Heart-lung machines and other life-supporting
electronic medical devices

• Wearable electronic medical devices, such as
electrocardiographs and intravenous drip equipment

This product has a built-in rechargeable battery. To
prevent the risk of overheating, ignition or explosion,
do not throw into fire, apply heat, or charge, use, or
leave in a high temperature environment.

WARNING

To prevent the risk of personal injury, electric shock
or fire, immediately stop use and unplug the charger
from the wall outlet if you observe some abnormality
in the product. Have the product inspected by an
authorized service center if the toothbrush or
charger is deformed of abnormally hot, there is
smell of burning or abnormal sound.

To prevent the risk of electric shock or fire, fully
insert the power plug.

To prevent the risk of fire due to insulation failure
by humidity, clean the power plug once every six
months. Disconnect the power plug and wipe dust
off with a dry cloth.

To prevent the risk of accident or injury due to
accidental ingestion of removable parts, do not
store within the reach of children or infants. Do not
let them use it.

This toothbrush releases minute amount of weak
current. To prevent accidents or cause them to feel
unwell, do not use during pregnancy and within one
month after giving birth.

To prevent risk of electric shock or fire, do not
damage, modify, forcefully bend, pull, twist, or bundle
cord. Do not wrap the cord around the charger when
storing.

To prevent the risk of burns or fire, use the supplied
charger only and do not charge any other product
with the supplied charger.

CAUTION

To prevent the risk of injury or damage to teeth and
gum, do not use this toothbrush if you have severe
gum disease, have teeth being treated, or are
concerned about symptoms in your mouth. Consult
a dentist before using this toothbrush.

4

CAUTION

To prevent the risk of injury or damage to teeth and
gum, do not use toothpaste that contains a high
abrasive content, such as toothpaste for removing tar
or for whitening. Do not apply the brush head strongly
against teeth or gums, or use it continuously on same
spot. Do not apply the plastic part of the main unit or
brush head to teeth.

To prevent risk of burns, do not place a metallic
object such as a coin or a clip on top of the charger.

► Notes

When you first begin using the toothbrush, you may experience slight
bleeding of the gums even though your gums may be healthy. This is
because your gums are receiving stimulation by the toothbrush for
the first time. The bleeding should stop after one or two weeks of use.
Bleeding that persists for more than two weeks may be indication of
an abnormal condition of your gums, such as pyorrhea. In this case,
stop using the toothbrush and consult your dentist.

5

Parts identification

 






 





















A Main unit

1 Ion panel
2 Toothbrush shaft
3 Waterproof rubber seal
4 Ion lamp
5 Power switch [0/1]
6 Mode selector
7 Mode indicator
8 Charge status lamp ( )
9 Battery capacity lamp ( )

Characteristics of brush bristles ()

The bristles in the center (high‑density bristles) are arranged in a diamond shape, which is designed for stain care.

 
















B Ionic stain care brush

 Tongue cleaner
 Identification ring
 Extra fine side bristles
 High‑density bristles
 Brush head electrode section

C Ionic two-way silicone brush
D Point brush



E Charger (RE8-52)

 Cord
 Power plug
 Charger base
 Charging section
 Main unit guide
 Brush head storage

Accessories

F Brush stand
G Travel case



6

Storing and charging the toothbrush

2

•If the toothbrush stops operating when first using it (immediately
after purchasing it, or after not using it for 3 months or more) or
during use, charge the main unit.

•Adequate ambient temperature for charging is 5 °C – 35 °C
(41 °F – 95 °F).
The battery may not charge properly or not at all under extreme
low or high temperatures.

•You can keep the main unit attached on the charger when not in
use to maintain the full battery capacity. It will not overcharge the
main unit.

•The main unit may become warm during use and charging.
However, this is normal.

Place the charger on a stable

1

1

horizontal surface such as
countertop.

Align the main unit so it is

2

2

facing forward, and set it
straight into the charging
section.

Insert the power plug into the

3

3

household outlet.

•The charge status lamp glows and
the charging will start.

•Charging cannot start when the main
unit is tilted or the bottom of the main
unit is not in contact with the charging
section.

1

3

If not charging constantly

•You can fully charge the toothbrush in approx. 17 hours.
The charging time may decrease depending on the charging
capacity.

•

A full charge will supply enough power for approx. 90 minutes use.

•

Disconnect the power plug when the charge status lamp turns off.

► About storage

Use the main unit guide to store the main unit and the brush head.

Slide and remove the main unit guide, and

1.

place it on horizontal and stable place.

2. Store the main unit and the brush head.

7

About the lamp

When the battery

capacity is low

The battery

capacity lamp

blinks.

•The toothbrush may not charge even if the charge status lamp
turns on when a charger other than the supplied charger is used.

While charging

The charge status

lamp glows.

After charging is

completed

The charge status

lamp turns off

Before cleaning your teeth

The brush head of this sonic vibration toothbrush vibrates at a
high speed.
Therefore:

•You only need to lightly press the bristles against your teeth for
brushing.

•When first using this appliance, some may experience a tickling
or tingling sensation caused by the high‑speed vibrations. The
sensation should subside after you use the toothbrush several
more times.

•When in use, the main unit of this toothbrush emits a very weak
electric current (ionic current) in the oral cavity.

•Touching the ion panel with your hand when you hold the main
unit to brush your teeth causes a very weak electric current (ionic
current) to flow between your teeth and the brush head.









a Brush head (negative

electrode)

b Ion panel (positive

electrode)

•The ion lamp on the mechanism that generates the very weak
electric current (see figure above) turns on or blinks to indicate
whether ionic power is being applied to the teeth.

c Very weak electric current
d Mechanism that generates

very weak electric current

8

•You can easily see the lamp status if you use a mirror while
brushing.

•Ionic power is not employed with the point brush. (The ion lamp
blinks.)

Pressing the power switch

Activates the mechanism that

generates the very weak

electric current, and the ion

lamp blinks on and off.

Putting the brush in your mouth

Passes a very weak electric
current in the oral cavity, ionic
power is activated and the ion

lamp turns on.

Notes

•Recommended ambient temperature for using is 5 °C – 35 °C
(41 °F – 95 °F).

•Do not allow hair products (e.g., gel or oil) or hand lotion to come
in contact with the unit as they may damage its surface.

•Do not forcefully turn the brush head with the brush head
attached to the main unit. Doing so may cause the brush head or
main unit to become damaged.

► About uses and operating modes

Brush head Use Mode Description

•Recommended for

WHITE

Brushing

(dental
plaque

removal)

Gum care GUM CARE

Point

brushing

•Stains refer to discoloration on the surface of the teeth due to
food and drink such as coffee, wine and tea.

SOFT

SENSITIVE

WHITE

SOFT

SENSITIVE

removing plaque and
stain care with normal
tooth brushing

•Recommended when
you feel the WHITE
mode is too powerful

•Recommended for
tongue cleaning

Recommended for

•

brushing carefully
between the teeth and
gums

•Uses rhythmical
vibrations to care for
your gums.

•Recommended for
removing dental plaque
from between teeth and
areas where teeth are
misaligned

•Recommended when
you feel the WHITE
mode is too powerful

•Particularly
recommended when
brushing to care for
areas between teeth

9

•

It is not possible to whiten the color of teeth beyond their original
color, yellowing teeth due to aging, or discolored teeth.

► About soft start function (For WHITE mode only)

The toothbrush will gradually reach the selected speed and
vibration approximately 2 seconds after it starts operating.

► About the 30-second brushing notification timer function

The timer will signal once at 30‑second intervals to indicate the
brushing time for each part of your mouth. It will signal twice at
2‑minute intervals to indicate the recommended total brushing time.
It is important to brush each area in the same sequence and with
the same amount of time, every time you brush, to uniformly brush
and clean your teeth.
Use the 30‑second brushing notification timer function wisely so
there will be no missed spot in your mouth.

•Divide your teeth into 4 parts (upper
and lower, left and right), and brush
one part in order such as “(1) front of
the teeth”, “(2) biting plane of the
teeth”, and “(3) back of the teeth”
spending 30 seconds at each part.
Brush the other parts in the same
manner, and brush your whole mouth
in about 2 minutes.

► About mode storage function

This function stores the previously selected mode of operation,
allowing the same mode to be used again.
Mode storage is reset if the unit has discharged and has been
unused for a long period of time, or if the battery has been
completely drained.
After charging, the product starts in WHITE mode, however this is
not a malfunction.

(3)

(2)

(1)

Using the toothbrush

•If dried toothpaste or water stains have adhered to the ion panel,
the very weak electric current may be unable to pass into the oral
cavity. Please clean the ion panel.

Place the brush head firmly onto

1

1

the toothbrush shaft.

•As shown in the picture, align the front of
the electrode section of the ionic stain
care brush or silicone brush with the main
unit.

•Attaching or removing diagonally or while
twisting may cause the brush head or the
main unit to become damaged.

•The toothbrush shaft will move when a
force is applied. This is required for
operation, and is not a malfunction.

•There will be a small gap between the
brush head and the main unit.

Grasp the main unit.

2

2

•The very weak electric current
may not pass into the oral
cavity if the toothbrush is held
in the same way as a pen so
that your hand does not touch
the ion panel.
Please grasp the main unit as
shown in the figure, so that
your hand comes in contact
with the ion panel.

1

10

Press the mode selector to select

45˚

3

3

the mode.

•The previously selected operating mode is
stored, and the mode indicator turns on.

•Each time you press the mode selector, the
mode changes.
(See page 9.)

Place the toothbrush in your mouth.

4

4

•Apply a small amount of toothpaste to the brush head, if
desired, before turning the power on to prevent the
toothpaste from spattering.

Press the power switch to turn on the main unit.

5

5

•During operation, the operating mode changes each time
the mode change switch is pressed.

•The sound may increase when the brush head is pressed
too strongly against the teeth, but this is not a malfunction.
Apply the brush head lightly against the teeth.

Turn off the main unit when you have finished

6

6

brushing.

•Turn off the main unit before removing it from your mouth to
prevent foam from spattering.

Tips on usage

5
3

How to apply/move when brushing your teeth

Mode: WHITE/SOFT/SENSITIVE

► For the boundary between the tooth surfaces, or teeth and gums

Place the bristles at a 45˚ angle.

► For the back of the front teeth or misaligned teeth

Brush vertically.
Move toothbrush to match the angle of the teeth.

► For the biting surface (back teeth)

Apply from top.

•Place the bristles of the brush gently against your teeth and
move the toothbrush slowly.
The movement will slow down when the brush head is applied
too strong.

•Apply a small amount when using toothpaste.

11

How to apply/move when cleaning your tongue

Mode: SOFT

Apply the tongue cleaner so that it barely
touches the tongue, and move forward
with slight force from the area that
becomes dirty.
Repeat several times.

•You may injure your tongue if the tongue
cleaner is pressed against the tongue
too hard.

► To prevent emetic response

Poke your tongue out and apply the brush while you are breathing
out.

How to use the point brush

Mode: WHITE/SOFT/SENSITIVE

Use in areas where your teeth are misaligned or in
areas that are hard to reach with a standard brush
head.

•Use the brush perpendicularly.

•Move the brush gently between your teeth.

•Apply just enough strength so that the tips of the

brush head bristles are lightly touching your teeth.

How to use the ionic two-way silicone brush

Mode: GUM CARE

•Carbon is used in the rubber section, so
gripping it firmly may cause a black
powder to adhere to your hands,
however this is not a safety concern.

•This toothbrush is different to one with a
brush head with nylon bristles, as there
is no sense of scouring‑type brushing.

•Be careful when using the brush head
‑ forcefully pulling or biting the rubber
section may cause it to come off.
Do not apply the brush to your teeth. (This

•

can cause the silicone brush to degrade.)

•Select your preferred stiffness from
“normal” or “stiff.”

► Application to gums/movement

•Use as close as possible to a right angle.

•Use the toothbrush so that the tips of the

silicone brush bristles are lightly touching
your gums. Move the brush back and forth
gently across your entire gums.

•Recommended usage is once a day, for
approximately 2 minutes.

•Use gently at points of concern. (Use for
around 10 to 20 seconds at each area.)



a

“Normal” stiffness

b “Stiff” stiffness

12

How to clean

Use mild detergent when cleaning the product with detergent.
Never use chemical agents such as thinner, benzine, or alcohol.

Cleaning the main unit and the brush head

•Cleaning and user maintenance should not be made by children.

•Turn off the main unit and remove the

brush head before cleaning them with
water.

► Brush head

Wash the brush head under running water.

•Carefully wash the inside and the bottom areas of
the brush head, as well as the brush head
electrode section.

•Shake well to remove water after washing.

•Do not pull the bristles of the brush.

•Do not force apart the rubber section of the silicone

brush.

•Do not wash with water hotter than 80 ˚C (176 °F).

•Do not wash the tongue cleaner excessively with a

pointed object or fingernails.

► Main unit

Wash the main unit under running water.

•Do not rub or damage the waterproof rubber seal.

•Do not immerse the main unit under water.

•Do not wash with water hotter than 40 ˚C

(104 °F).

•Completely remove any toothpaste or water
stains from the ion panel.

► After washing with water

1. Wipe dry with a cloth.

•Do not charge while it is wet.

2. Return the main unit and the brush head to
the charger.

•Return other brush heads to the brush

stand.

If the identification ring comes off

Put the identification ring back on.

•The identification ring may break if pulling

it too strong.

•Using the toothbrush without the

identification ring has no effect on its
performance. The ring is simply for user
identification purposes.

Cleaning the charger

1. Slide and remove the main unit guide
from the charger base.

2. Wipe off any dirt on the charger base
using a soft cloth.

13

3. Wash the main unit guide with water.

•Wipe off water after washing.

•Only use water to wash the main unit

guide.

4. Wipe the prongs of the power plug with
a dry cloth about once every 6 months.

Cleaning the travel case and the brush stand

1. Wash with water.

2. Wipe off water after washing.

If the top case has come off

Align the mounting section of

1.
the top case and the bottom
case as shown in the figure.

2.

Press the top case in the

direction indicated by arrows.

2

2

11

11

2

2

1

1

Frequently Asked Questions (Ion lamp)

The lamp does not turn on, even though the toothbrush is in

Q

my mouth.

A

Your hands are dry.
Toothpaste or water stains

have adhered to the ion
panel.

You are brushing without
touching the ion panel.

The lamp turns on even though the toothbrush is not in my

Q

mouth. (This is not a malfunction.)
During use, you may have

A

touched the ion electrode
section of the ion panel and
brush head (or the
toothbrush shaft) with your
hand.

You washed the main unit
with water while using it.

You removed the brush
head from your mouth just
after brushing without
turning off the power switch.

Moisten your hands and try
using it again.

Clean the ion panel
thoroughly and try using it
again.

Hold the main unit so that
your hand is touching the ion
panel and try using it again.

The very weak electric
current may be flowing
through the moisture that is
on your hands.

The very weak electric
current may be flowing
through the moisture
between the toothbrush
shaft and the ion panel.

The very weak electric
current may be flowing
through saliva or other
liquid on the surface of the
brush head and main unit.

14

Troubleshooting

Problem Possible cause Action

The charge status lamp does
not turn on.

The charge status lamp is
blinking rapidly.
(Twice every second)

The toothbrush can be used
only for several minutes, even
if it is charged.

You have just purchased the toothbrush or
have not used it for a while.

The temperature is too low or high while
charging.

The charging time is short.

The main unit does not stand straight on the
charger.

The toothbrush may not blink or turn on for several
minutes after starting to charge it, however it will
turn on if you continue to charge it. If it continues
to blink after a while, contact an authorized
service center for repair.

Charge the toothbrush within the recommended
charging temperature of 5 °C (41 °F) to 35 °C
(95 °F). If it continues to blink even when charging
within the recommended charging temperature,
contact an authorized service center for repair.

Charge the toothbrush for 17 hours or longer.
(See page 7.)

Stand the main unit so the bottom is in contact
with the charging section of the charger, and
check that the charge status lamp comes on.

The toothbrush does not
operate without the battery
capacity lamp blinks.

The toothbrush does not
operate.

The toothbrush stops operating
every once in a while.

The vibration increases
gradually when pressing the
power switch.

The rechargeable battery has reached its
operating life.
(Approx. 3 years)

The temperature is too low or high while
using it.

The “30‑second brushing notification timer
function” is in operation.
(See page 10.)

The “Soft start function” is in operation.
(See page 10.)

Contact an authorized service center for repair.

Use within the recommended usage temperature
of 5 °C (41 °F) to 35 °C (95 °F).

This is not a malfunction.
Continue using it.

15

Problem Possible cause Action

The movement decreases
when the brush head is
pressed against teeth.

The sound increases when the
brush head is pressed against
teeth.

The toothbrush shaft moves. This is not a malfunction. (See page 10.)

There is an acidic taste.

The ion lamp turns on, even
though you are not brushing.

The ion lamp does not turn on,
even though you are brushing.

The brush head is pressed against teeth too
strong.
(See page 11.)

Some people may notice a taste or sense an
electric current. This is because of the very
weak electric current running inside the oral
cavity.

•This differs depending on the person.

Apply the brush head lightly against teeth.

This is not a malfunction.
Concerned users are advised to use SOFT mode
or SENSITIVE mode. (These modes use a weaker
electric current than WHITE mode, so you should
be less aware of it.)

This is not a malfunction.
(See page 14.)

16

Battery life

Approximately 3 years. The battery may have reached its operating
life if the usage frequency decreases drastically, even after a full
charge.
(The operating life of the battery may differ depending on usage or
storage conditions)

Removing the built-in rechargeable battery

ATTENTION:
A lithium ion battery that is recyclable powers the product you
have purchased. Please call 1‑800‑8‑BATTERY for information
on how to recycle this battery.

Remove the built-in rechargeable battery before disposing the
toothbrush.

This figure must only be used when disposing the toothbrush, and
must not be used to repair it. If you dismantle the toothbrush yourself,
it will no longer be waterproof, which may cause it to malfunction.

•

Remove the toothbrush from the charger when removing the battery.

•Press the power switch to turn on the power and then keep the
power on until the battery is completely discharged.

•Perform steps 1 to 4 and lift the battery, and then remove it.

•Please take care not to short‑circuit the battery.







Specifications

Power source

Battery
Charging time Approx. 17 hours

This product is intended for household use only.

See the name plate on the product
(Automatic voltage conversion)

1 Lithium‑ion battery
(3.6 V; 500 mAh)



17

Changing the brush head (Sold separately)

•The brush should be replaced with a new one every 3 months or
so due to hygiene reasons, even if its shape is unchanged.

•If the bristles are bent to one side or worn, the toothbrush is not
effective for brushing. Replace the brush head with a new one.

Part number Replacement Brush for EW‑DE92

WEW0908 Ionic stain care brush
WEW0906 Ionic two‑way silicone brush
WEW0940 Point brush
WEW0929 Stain care brush

Personal Care & Beauty Care Products

FOR USA AND PUERTO RICO ONLY

30-Day Quality

Satisfaction Guarantee

If you are dissatisfied with any Panasonic Personal Care &
Beauty Care Products for any reason, simply return it to the
place of purchase with a dated proof of purchase, in the original
packaging, with all accessories, parts and instructions, within
30 days of the date of purchase, for a full refund, or call
Panasonic at 1‑800‑338‑0552.
Abuse or misapplication of this product voids the guarantee.

18

FOR YOUR CONVENIENCE, WE HAVE ESTABLISHED A
TOLL-FREE (IN USA ONLY) NATIONAL ACCESSORY
PURCHASE HOT LINE AT 1-800-332-5368.

MEMO

19

IN USA CONTACT:

Panasonic Corporation of North America

Two Riverfront Plaza, Newark, NJ 07102‑5490

Service • Assistance • Accessories
Call 1-800-338-0552 (In USA)

http://www.panasonic.com/consumersupport/

Panasonic Corporation

33, Okamachi, Hikone, Shiga, Japan

Panasonic Corporation

http://panasonic.net/

© Panasonic Corporation 2013

EN

EW9700DE921A Y1213‑0

F

Printed in Japan