Toa A-1812 - Manual (Page 4)

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• Do not block the ventilation slots in the unit's cover.
Doing so may cause heat to build up inside the unit
and result in fire.
• 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.
• Make sure that the volume control is set to
minimum position before power is switched on.
Loud noise produced at high volume when power is
switched on can impair hearing.
• Do not operate the unit for an extended period of
time with the sound distorting. This is an indication
of a malfunction, which in turn can cause heat to
generate and result in a fire.
• Contact your TOA dealer as to the cleaning. If dust
is allowed to accumulate in the unit over a long
period of time, a fire or damage to the unit may
result.
• 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.
2. GENERAL DESCRIPTION
Equipped with Priority function, Chime function, and 2 Zone selector switches, TOA's A-1803, A-1806, and A-
1812 PA Amplifiers are designed to suit PA system applications such as paging announcements,
intercommunications, BGM and broadcasting in schools, offices and shops.
3. FEATURES
• Power output of 30 W (A-1803), 60 W (A-1806), and 120 W (A-1812).
• Built-in chime unit (1-tone chime, 2-tone chime, and ascending 4-tone chime)
• Chime can be sounded on use of the MIC 1 input (an optional PM-660D Paging Microphone connectable) or
on Telephone paging.
• Priority function provided for inputs as follows:
Emergency input has the highest priority to all inputs. (Contact activation)
Telephone Paging input has precedence over the inputs other than Emergency input.
MIC 1 input has precedence over the inputs other than Emergency and Telephone Paging inputs.
• Emergency function performs as follows:
Closing the contact at the Emergency Control input terminals turns ON the unit's power even if it is OFF, and
both Zone selector switches.
• Following audio signal inputs suitable for the intended applications: 3 Microphone inputs, 3 AUX inputs, 1
Emergency input, and 1 Telephone Paging input.
• Phantom-powered Microphone inputs (power ON/OFF switchable).
• Combined XLR/phone jack Microphone inputs for convenient use.
• Electronically-balanced Microphone inputs.
• Speaker selectors for 2-zone broadcast.
• Tone controls (bass and treble).
• Output level meter.
• Master volume control for overall input (excluding the Emergency input) signal level adjustment.
• AC and DC power source.
An all-pole mains switch with a contact separation of at least 3 mm in each pole shall be incorporated in
the electrical installation of the building.