TOA FS-7006PA User manual

OPERATING INSTRUCTIONS

Thank you for purchasing TOA's Power Amplifiers.

Please carefully follow the instructions in this manual to ensure long, trouble-free use of your equipment.

POWER AMPLIFIERS

AMPLIFIER AUTO SWITCHING

MODULE

(Optional)

FS-7006PA

FS-7012PA

YA-7000

TABLE OF CONTENTS

1. SAFETY PRECAUTIONS ................................................................................. 3

2. GENERAL DESCRIPTION .............................................................................. 5

3. FEATURES ........................................................................................................... 5

4. HANDLING PRECAUTIONS ........................................................................... 5

5. INSTALLATION PRECAUTIONS ................................................................... 6

6. NOMENCLATURE AND FUNCTIONS

6.1. FS-7006PA/7012PA Power Amplifiers

Front ................................................................................................................... 7

Rear ................................................................................................................... 8

6.2. YA-7000 Amplifier Auto Switching Module (Optional)

Front ................................................................................................................... 9

7. CONNECTIONS

7.1. Speaker Connections ....................................................................................... 10

7.2. Volume Control Bypass Control Input Connections ......................................... 10

7.3. Mounting and Connecting the YA-7000

7.3.1. YA-7000 Installation ............................................................................... 11

7.3.2. YA-7000 Connections ............................................................................ 12

7.3.3. Checking Amplifier Operation ................................................................ 14

7.4. Removable Terminal Plug Connection ............................................................. 15

8. FAILURE INDICATION .................................................................................... 16

9. DIMENSIONAL DIAGRAM ............................................................................ 17

10. BLOCK DIAGRAMS

10.1. FS-7006PA ..................................................................................................... 18

10.2. FS-7012PA ..................................................................................................... 19

10.3. YA-7000 ......................................................................................................... 20

11. SPECIFICATIONS

11.1. FS-7006PA/7012PA Power Amplifiers .......................................................... 21

11.2. YA-7000 Amplifier Auto Switching Module (Optional) ................................... 22

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.

• Install the unit only in a location that can

structurally support the weight of the unit and the

mounting bracket. Doing otherwise may result in

the unit falling down and causing personal injury

and/or property damage.

• Owing to the unit's size and weight, be sure that at

least two persons are available to install the unit.

Failure to do so could result in personal injury.

• Tighten each nut and bolt securely. Ensure that the

bracket has no loose joints after installation to

prevent accidents that could result in personal

injury.

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.)

1. SAFETY PRECAUTIONS

• Before installation or use, be sure to carefully read all the instructions in this section for correct and safe

operation.

• Be sure to follow all the precautionary instructions in this section, which contain important warnings and/or

cautions regarding safety.

• After reading, keep this 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 and

understand the safety symbols and messages so you are thoroughly aware of the potential safety hazards.

WARNING

Indicates a potentially hazardous situation which, if mishandled, could

result in death or serious personal injury.

Indicates a potentially hazardous situation which, if mishandled, could

result in moderate or minor personal injury, and/or property damage.

WARNING

CAUTION

• 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

qualified service personnel.

• 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 of the

unit's cover, as this may result in fire or electric

shock.

• Do not touch a plug during thunder and lightning,

as this may result in electric shock.

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 ventilation slots in the unit's cover.

Doing so may cause heat to build up inside the unit

and result in fire. Also, periodically clean the

ventilation slots of dust.

• To avoid electric shocks, be sure to switch off the

unit's power when connecting speakers.

• 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.

• 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.

• Be sure to follow the instructions below when rack-

mounting the unit. Failure to do so may cause a fire

or personal injury.

· Install the equipment rack on a stable, hard floor.

Fix it with anchor bolts or take other arrangements

to prevent it from falling down.

· When connecting the unit's power cord to an AC

outlet, use the AC outlet with current capacity

allowable to the unit.

When the Unit is in Use

• Make sure that the volume control is set to

minimum position before power is switched on.

Loud noise produced at high volume when power is

switched on can impair hearing.

• 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. Doing otherwise may cause a fire or electric

shock.

CAUTION

WARNING

2. GENERAL DESCRIPTION

TOA's FS-7006PA (600 W) and FS-7012PA (1,200 W) are power amplifiers designed for 100 V line and high

impedance applications. By mounting an optional YA-7000 module in the power amplifier and connecting it to

a standby amplifier, the power amplifier can be automatically switched over to the standby amplifier if the

power amplifier fails, allowing broadcasts in progress to continue uninterrupted.

3. FEATURES

• A built-in limiter circuit limits current flow if there is an electrical overload, and a protection circuit that detects

the voltage and current disconnects the output if there is a short circuit. This protection circuit also

disconnects the output if the amplifier's internal temperature rises significantly.

• Front volume control offers convenient output volume adjustment.

• Control input can bypass the volume control mounted on the front panel to allow "Urgency" announcements

to be broadcast at maximum sound volume regardless of volume setting.

• Continuously variable air-cooling system adjusts fan speed according to the temperature in the amplifier's

heat sink. This variability ensures that cooling fan noise is minimized as much as possible under normal

usage conditions.

4. HANDLING PRECAUTIONS

• Keep input cables away from output cables. Installing both cables too close to each other can potentially

generate unwanted oscillation.

• Never connect 2 or more amplifiers to each other through their outputs, as this could cause the amplifiers to

fail.

• To clean, be sure to first switch off the amplifier power, then wipe with a dry cloth. When the amplifier is very

dirty, use a cloth moistened in a neutral cleanser. Never use any volatile liquids, such as benzene, thinner,

and chemically-treated towels, since the amplifier surface could be damaged.

5. INSTALLATION PRECAUTIONS

• To ensure proper ventilation and prevent excessive heat buildup, position the amplifier so that there is at

least 15 cm between the top and the ceiling, and at least 5 cm between the sides and any walls. Allow at

least 10 cm behind the amplifier to ensure that the fan air vent in the rear panel does not become

obstructed.

Over 5 cm Over 5 cm Over 10 cm

Over 15 cm

Air intake

vent

Front of amplifier

Air exhaust

vent

Perforated Panels

Power Amplifiers

FS-7006PA/7012PA

• When mounting amplifiers in an equipment rack, be sure to space them with perforated panels -- above and

below -- that are each at least 1U (44.5 mm) in height, as shown in the figure below.

• When mounting amplifiers in an equipment rack, allow at least 10 centimeters behind the amplifier to ensure

that the fan air vent in the rear panel does not become obstructed.

• Because the amplifier is heavy (24.8 kg for FS-7006PA, 35.4 kg for FS-7012PA), be sure to reinforce the

fittings used to fix the amplifier in place when mounting in a rack and requiring extra strenght.

• Rack mounting screws are not supplied with the amplifier. Use screws that are appropriate for the specific

type of rack used.

1. Power Switch

Press this switch to turn on the power. To turn off

the power, press this switch again.

2. Power Indicator

Lights when power is supplied and the FS-

7006PA/7012PA is ready for operation.

3. Volume Control

Adjusts the input signal level. This volume control

cannot be used while the Bypass Indicator (8)

continuously lights.

4. Fill-In Space

Write uses of the main and standby amplifiers in

this space.

5. Fault Indicator

Lights when an output muting function* is

operated or when a failure is detected.

If the YA-7000 is used, this indicator lights when

the YA-7000 detects a failure and the power

amplifier is switched over to a standby amplifier.

(See page 16.)

* This function prevents noise from being

generated when power is switched on and off.

6. Signal Indicator

Lights when a signal that exceeds a level 24 dB

below the rated output is sent to the Speaker Output

(11) on the rear panel.

7. Peak Indicator

Lights when a signal that exceeds a level of 3 dB

below the rated output is sent to Speaker Output (11)

on the rear panel.

8. Bypass Indicator

Lights when the Volume Bypass Control Input (13)

on the rear panel is enabled and indicates that the

Volume Control (3) has been bypassed and

disabled.

6. NOMENCLATURE AND FUNCTIONS

6.1. FS-7006PA/7012PA Power Amplifiers

[Front]

Figure shows the FS-7012PA.

10 11 12 13 14

[Rear]

Figure shows the FS-7012PA.

9. YA-7000 Receptacle

Mount an optional YA-7000 module from this

receptacle. (See page 11.)

Note

Use of the YA-7000 permits the main amplifier to

be switched over to a standby amplifier if the

main amplifier fails.

10. Power Cord

Connect this cord to the wall AC outlet (230 V

AC, 50 Hz).

11. Speaker Output Terminal (with cover)

High-impedance, 100 V line output for speaker

connections.

Note

Connect this terminal to the YA-7000 when the

YA-7000 has been mounted.

• FS-7006PA

M4 screw terminal; barrier distance: 9 mm; load

impedance: 16.7 Ω

• FS-7012PA

M4 screw terminal; barrier distance: 9 mm; load

impedance: 8.3 Ω

Note

Never connect this terminal to the speaker output

terminal of other FS-7006PA or FS-7012PA

power amplifier. Failure to follow this instruction

could lead to equipment failures.

12. Functional Earth Terminal

Connect this terminal to the functional earth

terminal of external equipment if excessive noise

is generated when the power amplifier is

connected to the external equipment. This could

reduce noise.

Note: This terminal is not for protective earth.

13.

Volume Control Bypass Control Input Terminal

Bypasses Volume Control (3) on the front panel

and allows announcements to be made at

maximum volume.

(Open voltage: under 24 V DC; short-circuit

current: under 10 mA; 2P terminal block)

14. Audio Signal Input Terminal

0 dB, 10 kΩ, balanced, 3P terminal block

6.2. YA-7000 Amplifier Auto Switching Module (Optional)

[Front]

21 3 4

1. Speaker Output Terminal (with cover)

High-impedance, 100V line output for speaker

connections. Signals from the Main Amplifier Input

(2) are output when the main amplifier (i.e. power

amplifier in which the YA-7000 has been mounted)

is operating correctly, and signals from the

Standby Amplifier Input (3) are output if a main

amplifier failure is detected.

(M4 screw terminal; barrier distance: 9 mm)

Note

Never connect this terminal to the speaker output

terminal of the FS-7006PA or FS-7012PA power

amplifier. Failure to follow this instruction could

lead to power amplifier failures.

2. Main Amplifier Input Terminal (with cover)

Connect the main amplifier's speaker output to

this terminal.

(M4 screw terminal; barrier distance: 9 mm)

Note

Only 1 piece of FS-7006PA or FS-7012PA can be

connected to this terminal. Never connect 2 or

more units to this terminal, as the excessive load

could cause the amplifier to fail.

3. Standby Amplifier Input Terminal (with cover)

Connect this terminal to the standby amplifier's

speaker output.

(M4 screw terminal; barrier distance: 9 mm)

Note

Only 1 piece of the FS-7006PA or FS-7012PA can

be connected to this terminal. Never connect 2 or

more units to this terminal, as the excessive load

could cause the amplifier to fail.

4. Operation Mode Selector Switch

Selects the YA-7000's operation mode. Set this

switch to the Normal position in general use.

(Default: Normal)

7. CONNECTIONS

7.1. Speaker Connections

When using the power amplifier without a YA-7000 installed, connect the speakers as follows:

Step 1.

Switch off the amplifier power.

Step 2. Remove the amplifier's speaker output terminal cover.

Step 3. Connect the speaker cables to the speaker output terminal.

Notes

• The speaker output terminal is designed for high impedance/100 V line applications. Be sure to

connect high-impedance speakers.

• The total rated power input for the speakers must be less than the amplifier's rated output power.

Connecting speakers that exceed the amplifier's rated output power could cause equipment failures.

Step 4.

Replace the terminal cover.

WARNING

The TERMINALS marked with the symbol are HAZARDOUS LIVE.

The external wiring to these terminals requires installation by an INSTRUCTED PERSON.

FS-7006PA/7012PA

Speaker Output Terminal

100 V line

Composite impedance

16.7Ω (FS-7006PA)

8.3Ω (FS-7012PA)

7.2. Volume Control Bypass Control Input Connections

Announcements requiring particular urgency (such as emergency broadcasts) can override the normal volume

control on the front of the amplifier in order to be heard at maximum sound volume. To set up this function,

connect a switch to the volume control bypass control input, and the broadcast can be output at maximum

sound volume as long as the control input is closed.

Note

Switches used with this function must be the type designed for the withstand voltage of at least 24 V DC and

contact capacity of at least 10 mA.

FS-7006PA/7012PA

Volume Control Bypass Control Input Terminal

Switch

7.3. Mounting and Connecting the YA-7000

7.3.1. YA-7000 Installation

YA-7000

Step 2. Connect the YA-7000's harness to the

amplifier's internal connector.

Step 3 . Mount the YA-7000 in the power amplifier's rear panel using the 2 supplied M3x6 screws.

Step 4 . Set the YA-7000's Operation Mode Selector Switch to the Normal position.

Step 1. Use nippers or a similar tool to remove the amplifier's rear-mounted YA-7000 receptacle

panel by cutting away the portions marked with (6 places).

Figure shows the FS-7012PA.

Connector

Machine screws M3 x 6

Operation

Mode Selector Switch

7.3.2. YA-7000 Connections

Power amplifiers installed with the YA-7000 are referred to as "main amplifiers" in this manual.

By connecting the YA-7000 to a standby amplifier, the main amplifier can be automatically switched over to

the standby amplifier if the main amplifier fails, allowing broadcasts in progress to continue uninterrupted.

Notes

• The speaker output terminal is designed for high impedance/100 V line applications. Be sure to connect

high-impedance speakers.

• The total rated power input for the speakers must be less than the power amplifier's rated output power.

Connecting speakers that exceed the amplifier's rated output power could cause equipment failures.

• Standby amplifiers must be the same type as the main amplifiers, or a type larger than the main amplifier in

terms of rated output power. If the standby amplifier's rated output power is smaller than that of the main

amplifier, it could be damaged by overload.

• Standby amplifiers cannot be shared with other main amplifiers.

• Only 1 piece of FS-7006PA or FS-7012PA can be connected to the YA-7000's main amplifier input and

standby amplifier input. Never connect 2 or more amplifiers to each of these terminals, as the excessive load

could cause the amplifier to fail.

Connections between amplifiers are as shown in the wiring diagram on the following page.

WARNING

The TERMINALS marked with the symbol are HAZARDOUS LIVE.

The external wiring to these terminals requires installation by an INSTRUCTED PERSON.

Step 1. Switch off the power amplifier's power.

Step 2. Remove all the terminal covers of equipment.

Step 3. Connect the main amplifier's Audio signal input terminal to the standby amplifier's Audio

signal input terminal.

Step 4. Connect the main amplifier's Speaker output terminal to the YA-7000's Main amplifier input

terminal.

Step 5. Connect the standby amplifier's Speaker output terminal to the YA-7000's Standby amplifier

input terminal.

Step 6. Connect the speaker cables to the YA-7000's Speaker output terminal.

Step 7. Replace the terminal covers.

[Wiring Diagram]

YA-7000

100 V line

Composite impedance

16.7Ω (FS-7006PA)

8.3Ω (FS-7012PA)

[Main Amplifier]

[Standby Amplifier]

Speaker Output Terminal

Main Amplifier

Input Terminal

Standby Amplifier

Input Terminal

Audio Signal Input Terminal

7.3.3. Checking Amplifier Operation

Step 1. Shift the YA-7000's Operation mode selector switch to the "TEST" position while making a broadcast.

Confirm that even with the switch in this Test position, the broadcast continues and the main

amplifier's Fault indicator lights.

YA-7000

Operation Mode Selector Switch

TEST

MODE

NORMAL

Fault Indicator

(lights)

Main Amplifier Front Panel

Step 2. Shift the YA-7000's Operation mode selector switch back to the "NORMAL" position.

Confirm that the main amplifier's Fault indicator extinguishes.

Note

If the main amplifier's Operation mode selector switch stays set to the "TEST" position, all broadcasts

will be made via the standby amplifier but will not be able to continue if the standby amplifier happens

to fail.

YA-7000

Operation Mode Selector Switch

Fault Indicator

(extinguishes)

Main Amplifier Front Panel

TEST

MODE

NORMAL

7.4. Removable Terminal Plug Connection

Cautions

• Avoid soldering cable conductor, as contact resistance may increase when the cable is tightened and the

solder is crushed, possibly resulting in an excessive rise in joint temperatures.

• Use cables of AWG 12 – 24.

Cable end treatment

7 mm

20 mm

2-core shielded cable

Connector connections

Step 1. Loosen the terminal screw, then insert the cable.

Step 2. Retighten the terminal screw. (Pull on the cable to ensure it is securely connected.)

Slotted screwdriver

Loosens

Terminal screw

Tightens

Shielded cable

Removable terminal plug

Tip

Recommended slotted screwdriver type: Screwdriver with blade that is 3 mm in width

3 mm

8. FAILURE INDICATION

The power amplifier is equipped with an indicator that alerts the user to equipment failures.

When this Fault indicator lights, it is likely that some problem has occurred with the equipment or wiring.

When the power indicator remains unlit, it is likely that the power amplifier is not operating correctly. If this

happens, first check to be sure that the power is being supplied correctly to the amplifier. If the power indicator

remains unlit even when the power is being supplied correctly, it is likely that some problem has occurred

inside the equipment. Contact your TOA dealer to arrange for diagnosis and repair.

The following causes can be considered when the Fault indicator lights:

Symptom Possible Cause Check/Remedy

Output is not being provided correctly

because of a short in the output wiring.

FS-7006PA's or

FS-7012PA's Fault

indicator lights.

Remove the output wiring and turn the

power on again. If the Fault indicator light

goes out, then the problem may be with

the wiring. Check the wiring to determine

where the problem may be.

If the indicator light does not go out, or if it

goes out but then lights again within a

short period of time, consider whether the

following may be the problem:

Equipment failure or excessive high

heat build-up inside the unit.

YA-7000's Operation Mode Selector

switch was set to "Test" during its

installation.

Check the following points if the indicator

automatically goes out within 30 minutes

after it has lit.

• Check installation conditions for

appropriate ventilation.

• Check the connected load capacity for

possible overload.

• Check to see if input and output cables

are installed close to each other.

If all of the above are found to be in

correct working order, then it is likely that

the equipment itself is malfunctioning in

some way.

Equipment failures can also be considered

if the indicator lights again within a short

period of time even if it has gone out once.

Request maintenance and repair action.

Set the mode switch to "Normal."

9. DIMENSIONAL DIAGRAM

132.6

57.2 37.7

482

465

532.7

441.260

Unit: mm

The FS-7006PA's external dimensions are identical

to those of the FS-7012PA.

10. BLOCK DIAGRAMS

10.1. FS-7006PA

POWER AMP UNIT

(BUILT-IN CURRENT LIMITER)

MIX

AMP

PRE-

AMP

FAN CONTROL CIRCUIT

• SPEED CONTROL

HEATSINK

TEMPERATURE

SENSOR

POWER

FOR POWER AMP UNIT

POWER

FOR SIGNAL CIRCUIT

POWER

FOR CONTROL CIRCUIT

RUSH CURRENT

CONTROL

THERMOSTAT

PROTECTION CIRCUIT

• POWER ON/OFF MUTE

• TEMPERATURE DETECTION

• YA-7000'S FAULT DETECTION

• SHORT DETECTION

BIAS CONTROL (POWER AMP UNIT)

YA-7000 (OPTION)

LINE INPUT

0 dB

10 kΩ

BALANCE

SPEAKER OUT

100 V

230 V AC

50 Hz

4 Ω

70 V

100 V

POWER

VOLUME

BYPASS

CONTROL

FAN

BYPASS SIGNAL PEAK FAULT POWER

10.2. FS-7012PA

POWER AMP UNIT

(BUILT-IN CURRENT LIMITER)

MIX

AMP

PRE-

AMP

POWER AMP UNIT

(BUILT-IN CURRENT LIMITER)

FAN CONTROL CIRCUIT

• SPEED CONTROL

HEATSINK

TEMPERATURE

SENSOR

POWER

FOR POWER AMP UNIT

POWER

FOR SIGNAL CIRCUIT

POWER

FOR CONTROL CIRCUIT

RUSH CURRENT

CONTROL

THERMOSTAT

PROTECTION CIRCUIT

• POWER ON/OFF MUTE

• TEMPERATURE DETECTION

• YA-7000'S FAULT DETECTION

• SHORT DETECTION

BIAS CONTROL (POWER AMP UNIT)

YA-7000 (OPTION)

LINE INPUT

0 dB

10 kΩ

BALANCE

SPEAKER OUT

100 V

230 V AC

50 Hz

70 V, 4Ω

100 V

POWER

CHOKE COIL

VOLUME

BYPASS

CONTROL

FAN

BYPASS SIGNAL PEAK FAULT POWER

10.3. YA-7000

PILOT TONE

OSCILLATOR

PILOT TONE

DETECTOR

SPEAKER OUTPUT

TO FS-7012PA/FS-7006PA

POWER

FAULT IN

FAULT OUT

PILOT TONE IN

PILOT TONE OUT

MAIN AMP INPUT

STANDBY AMP INPUT

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