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11. PROTECTION OPERATION LIST
Failure Protection Operation Indicator Remedy Recovery
Overcurrent due
to overload
Current limiter activated
when impedance drops
below the specified
value.
Peak indicator lights. Remove overload. Connecting a correct load
automatically restores
normal operation.
Short circuit Current limiter activated.
Load is disconnected.
Protection indicator
lights.
Check speakers and
lines for short circuit.
Turn off the power switch.
Correct the load, then
switch on the power.
Rise in heat sink
temperature
(over 110°C)
Load disconnected. Protection indicator
lights.
Temperature rise
inside the unit
(over 80°C)
Built-in amplifier unit
that caused the failure
halted.
Four indicators of
the corresponding
channel extinguish.
Check the unit for
correct ventilation and
overload.
Operation automatically
returns to normal when
the temperature decreases.
Abnormal DC
voltage output
Load disconnected. Protection indicator
lights.
Contact the TOA dealer where the unit was
purchased.
12. VOLUME CONTROL CAP ATTACHMENT
To protect the input volume control from accidental operation, it is recommended to replace the control knob
with the supplied volume control cap as illustrated.
Input volume control
Volume control cap (supplied)