3
• When moving the unit, be sure to remove its power
supply cord from the wall outlet. Moving the unit
with the power cord connected to the outlet may
cause damage to the power cord, resulting in fire or
electric shock. When removing the power cord, be
sure to hold its plug to pull.
• Avoid installing the unit in humid or dusty locations,
in locations exposed to the direct sunlight, near the
heaters, or in locations generating sooty smoke
or steam as doing otherwise may result in fire or
electric shock.
When the Unit is in Use
• Do not place heavy objects on the unit as this may
cause it to fall or break which may result in personal
injury and/or property damage. In addition, the
object itself may fall off and cause injury and/or
damage.
• If dust accumulates on the power supply plug or
in the wall AC outlet, a fire may result. Clean it
periodically. In addition, insert the plug in the wall
outlet securely.
• Switch off the power, and unplug the power supply
plug from the AC outlet for safety purposes when
cleaning or leaving the unit unused for 10 days or
more. Doing otherwise may cause a fire or electric
shock.
• Use the dedicated AC adapter for the unit. Note that
the use of other adapter may cause a fire.
• Remove the power supply plug of charger from
the AC outlet after charging completion, as doing
otherwise may cause a fire.
• Risk of explosion if battery is replaced by an
incorrect type. Dispose of used batteries according
to the instructions.
2. GENERAL DESCRIPTION
The TOA BC-920 is a dedicated battery charger for BP-920 and BP-900A lithium-ion batteries used in the TS-
821 and TS-921 Chairman units, and TS-822 and TS-922 Delegate units of TOA's Infrared conference system.
The BC-920 features an exclusive charging system for lithium-ion batteries, and permits up to 8 batteries to be
simultaneously charged within up to 5 hours.
3. HANDLING PRECAUTIONS
• Use the unit in locations where the temperature is between 0 and 40°C.
• Avoid installing the Battery charger in locations exposed to vibration. Batteries may not be correctly charged
due to poor contact.
• To clean, be sure to first switch off the unit's power, then wipe with a dry cloth. When the unit gets very dirty,
use a cloth damped in a neutral cleanser. Never use benzene, thinner or chemically-treated cleaning cloth
because such volatile liquids could deform or discolor the unit.
• Clean the charging terminals periodically with a dry cotton swab. Dirty terminals could cause bad contact,
thus preventing batteries from being correctly charged.
FCC REQUIREMENTS
Note
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant
to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful
interference in a 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 interference
to radio communications. However, there is no guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference to radio or television reception, which can be
determined by turning the equipment off and on, the user is encouraged to try to correct the interference by
one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
