Plantronics MHA 100 User manual

MHA 100
MOBILE HEADSET
AMPLIFIER
User Guide
MHA100

Important Safety Instructions
When using your telephone equipment,
basic safety precautions should always
be followed to reduce the risk of fire,
electric shock and injury to persons
including the following:
1. Read and understand all instructions.
2. Follow all warnings and instructions
marked on the equipment.
3. Do not use this equipment near a
bath tub, washbasin, kitchen sink or
laundry tub, in a wet basement, near
a swimming pool or anywhere else
there is water.
4. Avoid using a telephone (other than
a cordless type) during a storm.
There may be a remote risk of
electrical shock from lightning.
5. Do not use the telephone to report a
gas leak in the vicinity of the leak.
6. Use only the power cord and
batteries indicated in the manual.
Do not dispose of batteries in a fire.
They may explode. Check with
local codes for possible special
disposal instructions.
SAVE THESE INSTRUCTIONS

Safety Instructions For Batteries
Save These Instructions
CAUTION: Risk of explosion if battery
is replaced by an incorrect type.
Dispose of used batteries according to
the instructions.
To reduce the risk of fire or personal
injury read and follow these instructions:
1. Use only the approved battery in
your telephone equipment.
• 3 Zinc Air type batteries AC675
2. Do not dispose of the battery in a
fire as it may explode. Check with
local codes for possible special dis-
posal instructions.
3. Do not open or mutilate the battery.
Released electrolyte is corrosive and
may cause damage to the eyes and
skin. It may be toxic if swallowed.
4. Exercise care in handling batteries
in order not to short the battery with
conducting materials such as rings,
bracelets and keys. The battery or
conduction material may overheat
and cause burns.

5. Charge the battery (ies) provided
with or identified for use with this
product only in accordance with the
instructions and limitations specified
in this manual.
6. Observe proper polarity orientation
between the battery pack and the
battery charger.
7. Always store hearing aid batteries in
a dry place at room temperature.
Do not store them in the refrigerator,
nor store them under excessive heat.
8. If the battery gets wet it will erode
rapidly. Take the battery out of
your MHA100 and dispose of it.
Remove any excess moisture from
the MHA100 and then insert a
clean dry battery.

9. Zinc Air hearing aid batteries
are dangerous if swallowed. If a
battery should be accidentally
swallowed, see a doctor immed-
iately or call the National Button
Battery Hotline at 202-625-3333.
10. Recycling of your used hearing aid
batteries helps to protect the environ-
ment and conserves resources. For
information on how you can prop-
erly dispose of or recycle your
used hearing aid batteries, call
your local recycling hot line.
SAVE THESE INSTRUCTIONS

MHA100
Features
1. Volume Control Up/Down
2. Belt Clip
3. Coiled Cord for Cell
Phone Connection
4. On/Off LED (RED)
5. 2.5mm Headset Jack For
Headset Connection
6. Low Battery Indicator (RED)
1
2
3
4
5
6
Diagram A.

Power Requirements
This unit uses three (3) Zinc Air type 675
or AC675 batteries. Install the batteries
in battery compartment before using.
Diagram B. Battery Installation
Battery Installation and
Replacement
Remove the battery door by sliding it off
to the side of the MHA100.
To remove batteries turn the MHA100
upside down. The existing batteries will
drop from their slots.
The new batteries have a protective
covering and will not work unless the
covering is removed. Simply peel off the
covering using the tab and allow the
battery breathe for about 1 minute
before putting it into the MHA100.

MHA100
Place the batteries into the MHA100 with
the + (positive side) FACING UP.
Replace the battery door by sliding it
back on to the MHA100.
NOTE: Please remove expired batteries
to prevent leakage.
Battery Life: 30-40 hours of
continuous talk time depending
on usage and volume setting.
INSTALLATION AND OPERATION
Diagram C. Set-up of MHA100
NOTE: Use of this product requires a
telephone with a 2.5mm jack and a com-
patible headset. If your phone does not
have a 2.5mm jack, an adapter may be

required. Check with the manufacturer of
the telephone equipment.
1. Plug the coiled cord (2.5mm) of the
MHA100 into your telephone’s
headset jack.
2. Plug the connector of the headset
into the 2.5mm jack of the MHA100.
3. The MHA100 is sound/voice acti-
vated. The unit will automatically
turn on and the RED LED will light up
when a call is made or received.
4. Adjust the volume control to best suit
your hearing. For best results, set the
volume of your phone to minimum or
near minimum before adjusting the
volume controls of the MHA100.
Note: The RED LED will also blink to
indicate the amplifier has reached its
maximum volume limit.
5. The unit will turn off automatically
ten (10) seconds after the phone is
turned off or no sound is detected.
The MHA100 will automatically turn
on when there is sound activity de-
tected or a button on the cell phone
is pressed.
CAUTION: If the MHA100 does not
turn off after ten (10) seconds and your

telephone is turned off, unplug the coiled
cord from your phone. The unit will, and
should turn off in about 10 seconds. If the
MHA100 is still on after ten (10) seconds
or more, remove the batteries.
Low Battery Indicator
The low battery indicator monitors the
condition of the batteries. The indicator
will flash RED to indicate the batteries
should be changed. The indicator will
only flash while in use. Replace batteries
as soon as possible with 3 Zinc Air type
AC675 batteries.
Care and Maintenance
for Your MHA100
Daily care and attention will prolong the
life of your MHA100.
1. Do not store the MHA100 with the
battery installed for an extended
length of time.
2. Store your MHA100 in a dry place.
3. Do not expose your MHA100 to
excessive moisture, humidity, or steam.
4. Do not drop your MHA100 or allow
the MHA100 to be subjected to
rugged handling.

5. Keep fresh batteries in your
MHA100 and be aware that your
MHA100 will stop functioning when
the battery dies.
TROUBLE SHOOTING
Use this guide to help solve some of the
common problems the MHA100 may
experience. If you have a problem not
defined or one that persists, call your
local retailer or our customer service
department at 1-800-552-3368.
1. No Sound
• Battery may be dead.
• Battery may be in backwards.
• Verify that the phone is turned on.
• Stereo jack from MHA100 may not
be plugged all the way in.
2. Weak Sound
• Weak battery.
• Turn up the volume of the phone.
• Turn up the volume on the MHA100.
• Your hearing condition may
have changed.
• Your headset may not be
working correctly.
3. Whistling Sound
• MHA100 volume control is too high.

Readjust the volume until the
squeal is gone.
• The telephone used with the
MHA100 volume is set too high.
Readjust the volume until the
squeal is gone.
• Your headset may not be seated
snugly in the ear. If this problem
persists, try a different style of
headset that fits better with your
ear structure, where the micro-
phone and the speaker are not
located next to each other right by
the ear lobe.
• Move the phone, specifically the
antenna, away from the unit.
Part 15 of FCC Rules Information
This device complies with Part 15 of the
FCC Rules. Operation is subject to the
following two conditions: (1) This device
may not cause harmful interference, and
(2) this device must accept any interfer-
ence received, including interference that
may cause undesired operation.
Your equipment has been tested and
found to comply with the limits of a Class
B digital device, pursuant to Part 15 of
FCC rules. These limits are designed to

provide reasonable protection against
harmful interference in residential
installation.
This equipment generates uses and can
radiate radio frequency energy and, if
not installed and used in accordance with
the instructions, may cause harmful inter-
ference to radio communications. How-
ever, there is no guarantee that interfer-
ence will not occur in a particular installa-
tion; if this equipment does cause harmful
interference to radio or television recep-
tion, which can be determined by turning
the equipment off and on, you are
encouraged to try to correct the interfer-
ence by one of the following measures:
Where it can be done safely, reorient the
receiving television or radio antenna.
To the extent possible, relocate the televi-
sion, radio or other receiver with respect
to the telephone equipment. (This increas-
es the separation between the telephone
equipment and the receiver.)
Connect the telephone equipment into an
outlet on a circuit different from that to
which the television, radio, or other
receiver is connected.
Consult the dealer or an experienced
Radio/TV Technician for help.

CAUTION: Changes or modifications
not expressly approved by the manufac-
turer responsible for compliance could
void the user’s authority to operate
the equipment.
Industry Canada Technical
Specifications
This product meets the applicable
Industry Canada technical specifications.
Before installing this equipment, users
should ensure that it is permissible to be
connected to the facilities of the local
telecommunications company. The equip-
ment must also be installed using an
acceptable method of connection. In
some cases, the company’s inside wiring
associated with a single line individual
service may be extended by means of a
certified connector assembly (telephone
extension cord). The customer should be
aware that compliance with the above
conditions may not prevent degradation
of service in some situations.
Repairs to certified equipment should
be made by an authorized Canadian
maintenance facility designated by the
supplier. Any repairs or alterations
made by the user to this equipment, or

equipment malfunctions, may give the
telecommunications company cause
to request the user to disconnect the
equipment.
Users should ensure for their own protec-
tion that the electrical ground connections
of the power utility, telephone lines and
internal metallic water pipe system, if
present, are connected together. This
precaution may be particularly important
in rural areas.
CAUTION: Users should not attempt to
make such connections themselves, but
should contact the appropriate electrical
inspection authority, or electrician, as
appropriate.
The Ringer Equivalence Number is an
indication of the maximum number of
terminals allowed to be connected to a
telephone interface. The termination on
interference may consist of any combi-
nation of devices subject only to the
requirement that the sum of the Ringer
Equivalence Numbers of all the devices
does not exceed five.
(The term “IC:” before the certification/
registration number only signifies that the
Industry Canada technical specifications
were met.)

The party responsible for regulatory
compliance:
Clarity, A Division of Plantronics, Inc.
4289 Bonny Oaks Drive, Suite 106
Chattanooga, TN 37406
Phone: [phone]
WARRANTY & SERVICE
The following warranty and service
information applies only to products
purchased and used in the U.S. and
Canada. For warranty information
in other countries, please contact your
local retailer or distributor.
Limited Warranty
Clarity, a division of Plantronics, Inc.
(“Clarity”) warrants to the original con-
sumer purchaser that, except for limita-
tions and exclusions set forth below, this
product shall be free from defects in
materials and workmanship for a period
of one (1) year from the date of original
purchase (“Warranty Period”). The obli-
gation of Clarity under this warranty
shall be at Clarity’s option, without
charge, of any part or unit that proves
to be defective in material or workman-
ship during the Warranty Period.

Exclusions from Warranty
This warranty applies only to defects
in factory materials and factory
workmanship.
Any condition caused by accident, abuse,
misuse or improper operation, violation of
instructions furnished by Clarity, destruc-
tion or alteration, improper electrical
voltages or currents, or repair or mainte-
nance attempted by anyone other than
Clarity or an authorized service center,
is not a defect covered by this warranty.
Telephone companies manufacture differ-
ent types of equipment and Clarity does
not warrant that its equipment is compati-
ble with the equipment of a particular
phone company.
Implied Warranties
Under state law, you may be entitled to
the benefit of certain implied warranties.
These implied warranties will continue in
force only during the warranty period.
Some states do allow limitations on how
long an implied warranty lasts, so the
above limitation may not apply to you.
Incidental or Consequential Damages
Neither Clarity nor your retail dealer or
selling distributors has any responsibility

for any incidental or consequential
damages including without limitation,
commercial loss or profit, or for any
incidental expenses, expenses, loss of
time, or inconvenience. Some states do
not allow exclusion or limitation of inci-
dental or consequential damage, so the
above limitation or exclusion may not
apply to you.
Other Legal Rights
This warranty gives you specific legal
rights and you may also have other
rights which vary from state to state.
How to Obtain Warranty Service
To obtain warranty service, please pre-
pay shipment and return the unit to the
appropriate facility listed below.
In the United States
Clarity Service Center
4289 Bonny Oaks Drive, Suite 106
Chattanooga, Tennessee 37406
Tel. [phone] or
[phone]
Fax: [phone] or
[phone]

In Canada
Plantronics Service Center
1455 Pitfield Boulevard
Saint-Laurent
Quebec H4S 1G3
Tel: [phone]
[phone]
Fax: [phone]
Please use the original container,
or pack the unit(s) in a sturdy carton
with sufficient packing material to
prevent damage. Include the following
information:
1. A proof-of-purchase indicating
model number and date of
purchase.
2. Bill-to address.
3. Ship-to address.
4. Number and description of
units shipped.
5. Name and telephone number of
person to call, should contact be
necessary.
6. Reason for return and description
of the problem.
Damage occurring during shipment is
deemed the responsibility of the carrier,
and claims should be made directly with
the carrier.