Toa DA-250DH CE-AU - Manual (Page 5)

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4. HANDLING PRECAUTIONS
• Keep the input cable away from the output cable. If installed close to each other, oscillation could occur.
• To avoid unit failures, never connect outputs of two or more channels in parallel.
• Only connect speakers with an impedance equal to or greater than those specified. Connecting speakers
with a smaller impedance than specified could cause damage to the unit.
• Periodically clean the filter located inside the ventilation panel on the unit's front panel. If the filter becomes
clogged, heat will become trapped inside the enclosure.
• Install the unit in locations where the temperature is between –10 and +40°C and the moisture is less than
90%RH (no dew condensation must be formed).
• To clean, be sure to first turn off this unit's power switch, then wipe with a dry cloth. When the unit gets very
dirty, use a cloth damped in a neutral cleanser. Never use benzene, thinner, alcohol, or chemically-treated
cleaning cloth because such volatile liquids could deform or discolor the unit.
• The fan is a consumable product. As a guideline, we recommend that it be replaced with a new one when its
total operating time reaches approximately 20000 hours (when used in ambient temperatures of
approximately 25°C).
Note: The above figure is simply a guideline, and does not guarantee the fan’s operating life. Since
broadcasts from the digital power amplifier could be disabled if the fan malfunctions, the fan requires
regular inspection and maintenance. For maintenance service, please contact the dealer from whom
the digital amplifier was purchased.
5. INSTALLATION PRECAUTIONS
• The supplied power supply cord is designed for exclusive use with this unit. Never use it with other
equipment.
• When mounting the unit in an equipment rack, the inside of the rack must be sufficiently ventilated.
To achieve sufficient ventilation, remove all panels on the rear of the rack.
• When mounting the unit in the rack, also mount a Perforated Panel larger than 1U in size*:
(1) at the top and the bottom of the rack, and
(2) above and below every 5 units.
• Robust structure is one of the unit's main features. However, if the strength is particularly needed when
installing the unit in the rack, use a supporting runner for the safety purposes.
* 1U size = 44.5 mm (reference size)
Perforated panel
Power amplifiers
(5 units)
Power amplifiers
(5 units)
The supplied rack-mounting screws can be used for the TOA equipment
rack only. Do not use them for other racks.
When installing the unit in a rack other than that of TOA, be sure to use
the screws with a diameter of over 5 mm and length of over 12 mm to
mount the unit.
Failure to do so may cause personal injury.
CAUTION