Toa DA-250F CU Operating Instructions Manual Download Page 7

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6. 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. 

Perforated panel

Power amplifiers
DA-250F/250FH

Power amplifiers
DA-250F/250FH

• 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.

• Rack mounting screws are not supplied with the unit. Be sure to use the screws with a diameter of over 5

mm and length of over 12 mm to mount the unit.

* 1U size = 44.5 mm (reference size)

Summary of Contents for DA-250F CU

Page 1: ...WER AMPLIFIERS DA 250F CU DA 250FH CU Thank you for purchasing TOA s Multichannel Power Amplifier Please carefully follow the instructions in this manual to ensure long trouble free use of your equipm...

Page 2: ...ont 8 Rear 9 8 CONNECTIONS 8 1 Procedure 10 8 2 Button Settings and Speaker Connections 10 9 REMOVABLE TERMINAL PLUG CONNECTION 12 10 INPUT SENSITIVITY AND HIGH PASS FILTER ON OFF SETTINGS 13 11 PROTE...

Page 3: ...torms or when unused for long periods of time Refer all servicing to qualified service personnel Servicing is required when the apparatus has been damaged in any way such as power supply cord or plug...

Page 4: ...as there are high voltage components inside the unit Refer all servicing such as modification inside the unit to qualified service personnel Do not place cups bowls or other containers of liquid or me...

Page 5: ...AC outlet use the AC outlet with current capacity allowable to the unit When the Unit is in Use Make sure that all volume controls are set to minimum position before power is switched on Loud noise p...

Page 6: ...ase Input output status LED indicators for each channel Built in protection circuitry disconnects the output when a short circuit overload or unusual temperature rise occurs 1U size 44 5 mm reference...

Page 7: ...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 Perforated panel Power amplifiers DA 250F 250FH Power amplifiers DA 250F 250FH Robu...

Page 8: ...and 4 In this event the CH 4 volume control cannot be used 4 Ventilation panel Air Vent A filter is located inside the ventilation panel To clean the filter remove the ventilation panel See p 15 Clea...

Page 9: ...wiring See p 10 The unit s input mode changes as follows depending on the BRIDGE ON OFF button setting 4 channel input mode Set both BRIDGE 1 and 2 buttons to OFF 3 channel input mode Set either BRID...

Page 10: ...terminal cover in place BRIDGE 1 ON OFF button BRIDGE 2 ON OFF button CH 1 mode ON OFF button CH4 CH3 CH2 CH1 Speaker output terminals Button BRIDGE 1 BRIDGE 2 CH 1 mode OFF OFF OFF Setting 4 8 4 8 4...

Page 11: ...Setting CH3 CH4 3 inputs 3 outputs 2 CH3 CH4 CH1 CH3 CH4 CH1 CH2 Speaker output terminals 8 16 4 8 4 8 39 2 19 6 19 6 DA 250F DA 250FH BRIDGE 1 Button BRIDGE 1 BRIDGE 2 CH 1 mode ON OFF OFF Setting C...

Page 12: ...old Earth Bit shape 3 mm 9 REMOVABLE TERMINAL PLUG CONNECTION Cautions Be sure to use shielded cables for audio signal lines Avoid soldering cable conductor as contact resistance may increase when the...

Page 13: ...socket position to 4 dB or 10 dB for the Input sensitivity and to ON or OFF for the High pass filter DA 250FH only as illustrated below DA 250F 250FH Viewed from top with the top cover detached Front...

Page 14: ...mperature 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 correspondin...

Page 15: ...move the ventilation panel as shown in the figure Step 3 Detach the filter inside the ventilation panel Step 4 Clear the filter of dust Step 5 Replace the filter and ventilation panel Detach the panel...

Page 16: ...E 1 OUTPUT Current Limitter Short Detector Protection Circuit OUTPUT 2 relay CH 1 to all switch Current Limitter Short Detector Protection Circuit OUTPUT 3 relay CH 3 OUTPUT CH 4 OUTPUT 4 dB 10 dB CH...

Page 17: ...10 dB CH 2 volume control ON OFF BRIDGE 1 ON OFF switch BRIDGE 1 OUTPUT Current Limitter Short Detector Protection Circuit OUTPUT 2 relay CH 1 to all switch Current Limitter Short Detector Protection...

Page 18: ...18 15 DIMENSIONAL DIAGRAM Unit mm 482 465 400 374 20 31 8 44...

Page 19: ...0 3 20 Hz 20 kHz 0 3 100 Hz 20 kHz HPF ON 0 3 20 Hz 20 kHz HPF OFF 4 dB 1 23 V 10 dB 0 24 V selectable with the inner jumper 10 k electronically balanced 100 dB Input CH 1 4 Removable terminal block O...

Page 20: ...Printed in Japan 133 22 027 00...

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