7
12. Line Out
Input type is unbalanced, using XLR connector type for parallel output can connect to another of the
same unit or other equipments. Pin connector XLR : Pin 1, 3 : Earth, Pin 2: Hot
Note : When connecting to other equipment, they must be of same impedance.
13. Functional ground terminal [SIGNAL GND]
Hum noise may be generated when external equipment is connected to the unit. Connecting this terminal
to the functional ground terminal of the external equipment may reduce the hum noise.
Note : This terminal is not for protective earth.
14. AC Inlet
Connect the supplied power cord to this inlet. The socket-outlet shall be installed near the equipment and
the plug (disconnecting device) shall be easily accessible.
15. Ventilation Fan
To circulate the hot air out of the amplifier.
Caution: Do not close/block this hole, in order to protect the amplifier from over-heating.
16. Ventilation panel (Air Vent)
To circulate airflow into the unit.
Caution: Do not close/block this hole, in order to protect the amplifier from over-heating.
6. VOLUME CONTROL SETTINGS
Output levels are adjustable with individual volume controls. For music play or announcement, adjust the
corresponding volume control so that the red peak indicator lights intermittently.
Note that the sound quality is downgraded when the peak indicator remains lit.
7. PROTECTION OPERATION LIST
T
emperature rise
at power amp.
heat sink
(over 100
°
C)
Temperature rise
inside the unit
(over 80
°
C)
Failure
Protection
Operation
Indicator
Remedy
Recovery
Connecting a correct
load automatically
restores
normal operation.
Turn off this unit's
power switch. Correct
the load,
then turn on the power.
Operation
automatically
returns to normal when
the temperature
decreases.
Contact the TOA dealer where the unit
was purchased.
Remove
overload.
Check
speakers and
lines for short
circuit.
Check the unit
for correct
ventilation and
overload.
Peak indicator
lights.
Protection
indicator
lights.
Protection
indicator
lights.
Four indicators of
the
corresponding
channel
extinguish.
Current limiter is
activated. When
impedance drops
below the specified
value.
Current limiter is
activated.
Load is
disconnected.
Load disconnected.
Built-in amplifier unit
that caused the
failure halted.
Over current due
to overload
Short circuit
