Toa PA-1230B User manual

OPERATING INSTRUCTIONS
POWER AMPLIFIER PA-1230B
PA-2440B
PA-3640B
Please follow the instructions in this manual to obtain the optimum results from this unit.
We also recommend that you keep this manual handy for future reference.
This illustration shows the PA-2440B.
1. SAFETY PRECAUTIONS .......................... 2
2. GENERAL DESCRIPTION ........................ 4
3. PART NAMES AND FUNCTIONS
Front Panel ................................................. 4
Rear Panel ................................................. 4
4. RACK MOUNTING .................................... 5
5. AC POWER SUPPLY CONNECTION ....... 5
6. 24 V DC POWER SUPPLY ........................ 6
7. OUTPUT CONNECTIONS ......................... 6
8. SPECIFICATIONS ...................................... 7
TABLE OF CONTENTS

2
1. SAFETY PRECAUTIONS
• Be sure to read the instructions in this section carefully before use.
• Make sure to observe the instructions in this manual as the conventions of safety symbols and messages
regarded as very important precautions are included.
• We also recommend you keep this instruction manual handy for future reference.
Safety Symbol and Message Conventions
Safety symbols and messages described below are used in this manual to prevent bodily injury and property
damage which could result from mishandling. Before operating your product, read this manual first so you are
thoroughly aware of the potential safety hazards as well as understand the safety symbols and messages.
When Installing the Unit
• Do not expose the unit to rain or an environment where it may be splashed by water or other liquids, as
doing so may result in fire or electric shock.
• Use the unit only with the voltage specified on the unit. Using a voltage higher than that which is specified
may result in fire or electric shock.
• Do not cut, kink, otherwise damage nor modify the power supply cord. In addition, avoid using the power
cord in close proximity to heaters, and never place heavy objects -- including the unit itself -- on the power
cord, as doing so may result in fire or electric shock.
• Be sure to replace the unit's terminal cover after connection completion. Because the voltage of up to 100 V
is applied to the high impedance speaker terminals, never touch these terminals to avoid electric shock.
• Avoid installing or mounting the unit in unstable locations, such as on a rickety table or a slanted surface.
Doing so may result in the unit falling down and causing personal injury and/or property damage.
• Ensure that the voltage selector is properly set to the local power voltage. Wrong settings may cause a fire
or electric shock.
When the Unit is in Use
• Should the following irregularity be found during use, immediately switch off the power, disconnect the
power supply plug from the AC outlet and contact your nearest TOA dealer. Make no further attempt to
operate the unit in this condition as this may cause fire or electric shock.
· If you detect smoke or a strange smell coming from the unit.
· If water or any metallic object gets into the unit
· If the unit falls, or the unit case breaks
· If the power supply cord is damaged (exposure of the core, disconnection, etc.)
· If it is malfunctioning (no tone sounds.)
• To prevent a fire or electric shock, never open nor remove the unit case as there are high voltage
components inside the unit. Refer all servicing to your nearest TOA dealer.
• Do not place cups, bowls, or other containers of liquid or metallic objects on top of the unit. If they
accidentally spill into the unit, this may cause a fire or electric shock.
• Do not insert nor drop metallic objects or flammable materials in the ventilation slots as this may result in fire
or electric shock.
• Do not touch a plug or antenna during thunder and lightning, as this may result in electric shock.
Indicates a potentially hazardous situation which, if mishandled, could
result in death or serious personal injury.
WARNING

3
When Installing the Unit
• Never plug in nor remove the power supply plug with wet hands, as doing so may cause electric shock.
• When unplugging the power supply cord, be sure to grasp the power supply plug; never pull on the cord
itself. Operating the unit with a damaged power supply cord may cause a fire or electric shock.
• When moving the unit, be sure to remove its power supply cord from the wall outlet. Moving the unit with the
power cord connected to the outlet may cause damage to the power cord, resulting in fire or electric shock.
When removing the power cord, be sure to hold its plug to pull.
• Do not block the upper panel 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.
• Install the unit only in stable locations, and make appropriate arrangements to prevent it from falling down or
rolling cross the floor. If it falls down or moves, this may cause personal injury and/or property damage.
• When unpacking or moving the unit, be sure to handle it with two or more persons. Falling or dropping the
unit may cause personal injury and/or property damage.
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.
• 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. A fire or electric shock may result.
Indicates a potentially hazardous situation which, if mishandled, could
result in moderate or minor personal injury, and/or property damage.
CAUTION

4
2. GENERAL DESCRIPTION
The power amplifiers described in this manual are designed to be installed in an equipment rack or console.
3. PART NAMES AND FUNCTIONS
[Front panel]
4 321
110V : 10A
220V : 6A
25A
power
569 8
7
10
11
[Rear panel]
This illustration shows the PA-2440B.
This illustration shows the PA-2440B.
ACfuse
Capacity
ModelNo.
DCfuse 25A
PA-2440B
110Vversion:10A
220Vversion:6A
30A
PA-3640B
110Vversion:15A
220Vversion:8A
15A
PA-1230B
110Vversion:4A
220Vversion:2.5A
5. Input sensitivity control
Adjusts the input sensitivity.
Do not touch this control when driving in parallel.
The position of this control has been preset.
6. Input jack
Connects to the supplied phone plug cable for
connection of external equipment.
7. 24 VDC input terminal
Connects to the DC power supply.
8. Speaker output terminal
Connects to the speaker.
9. AC inlet
Connects to the supplied AC power cable.
10. Earth terminal
Be sure to ground the unit.
11. Voltage selector
Sets the operating voltage for either 110 VAC or
220 VAC (factory-preset position).
[IMPORTANT]
Be sure to select the proper local operating voltage.
1. Power indicator lamp
Lights when the power is switched on.
2. DC fuse holder
Refer to the table below for fuse capacity.
3. AC fuse holder
Refer to the table below for fuse capacity.
4. Handle

4. RACK MOUNTING
The power amplifiers are designed exclusively for rack mount use.
If 2 or more amplifiers are mounted in an equipment rack, space should be provided upper and lower side of
the units for ventilation.
The Perforated Panel is recommended in place of space.
5
5. AC POWER SUPPLY CONNECTION
Each power amplifier is a permanent connected apparatus having no power on/off switch on itself. Its power
cord should be connected to the Switched AC power outlet of the Junction Panel such as model JP-0410, so
that you can control the power on/off for the entire amplifier rack.
For the power line of the rack system, ALL-Pole Mains Switch with a contact separation of at least 3 mm in
each pole should be incorporated in the electrical installation of the building.
Equipment rack
Power amplifier panel Perforated panel

6
6. 24 V DC POWER SUPPLY
•When using a DC power supply, connect it to the terminal block on the unit's rear panel.
•When the AC power fails, the power is automatically switched to the DC power.
7. OUTPUT CONNECTIONS
Avoid using both the 70 V and 100 V outputs simultaneously. Be sure to only use either output.
Up to three amplifiers can be connected when driving in parallel.
24VDC IN SP OUTPUT
COM 4 Ω70V 100V
[ PA-1230B ]
24 VDC Battery
24VDC IN SP OUTPUT
COM 50V 70V 100V
[ PA-2440B ]
24 VDC Battery
24VDC IN SP OUTPUT
COM 70V 100V
[ PA-3640B ]
24 VDC Battery
PA-1230B PA-2440B PA-3640B
100 V 83 Ω42 Ω28Ω
70 V 41 Ω21 Ω14 Ω
50 V 10 Ω
[Impedance]

7
8. SPECIFICATIONS
Note: The design and specifications are subject to change without notice for improvement.
Models PA-1230B PA-2440B PA-3640B
Power Source 110/220 VAC, 50/60 Hz or 26.4 VDC
Power Consumption 400 VA at rated output 640 VA at rated output 820 VA at rated output
Input 0 dBV (adjustable), phone jack, balanced
Rated output 120 W 240 W 360 W
Output Impedance 83 Ω(100 V), 41 Ω(70 V), 42 Ω(100 V), 21 Ω(70 V), 28 Ω(100 V), 14 Ω(70 V)
4 Ω(low impedance) 10 Ω(50 V)
Frequency Response 70 Hz –10,000 Hz (+1 to
- 2 dB)
50 Hz ( - 3 dB), 15,000 Hz (
- 5 dB)
Distortion Less than 2 % THD at rated output
S/N Ratio 85 dB 80 dB
Finish Black
Dimensions 483 (w) x 132.6 (h) x 316 (d) mm 483 (w) x 177 (h) x 315.5 (d) mm
Weight 14.2 kg 20.3 kg 21.6 kg
Accessories Rack mounting screw : 4
AC fuse (2.5 A) : 1
AC fuse (4 A) : 2
DC fuse (15 A) : 1
Phone plug cord (1 m): 1
Speaker cord (2.5 m) :1
Rack mounting screw : 4
AC fuse (6 A) : 1
AC fuse (10 A) : 2
DC fuse (25 A) : 1
Phone plug cord (1 m): 1
Speaker cord (2.5 m) :1
Rack mounting screw : 4
AC fuse (8 A) : 1
AC fuse (15 A) : 2
DC fuse (30 A) : 1
Phone plug cord (1 m): 1
Speaker cord (2.5 m) :1

Printed in Japan
133-12-593-1B