Instruction/ maintenance manual of the product A-724 TOA Electronics
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OPERA TING INSTRUCTIONS 700 SERIES AMPLIFIERS A-706, A-712, A-724 Thank you for purchasing TOA's 700 Series Amplifiers. Please carefully follow the instructions in this manual to ensure long, trouble-free use of your equipment. 1. IMPORTANT SAFETY INSTRUCTIONS .
2 1. IMPORT ANT SAFETY INSTRUCTIONS • Read these instructions. • Keep these instructions. • Heed all warnings. • Follow all instructions. • Do not use this apparatus near water. • Clean only with dry cloth. • Do not block any ventilation openings.
3 surface. Doing so may result in the unit falling down, causing personal injury and/or property damage. 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.
4 1 2 3 4 5 6 7 8 5. NOMENCLA TURE AND FUNCTIONS [Front] 1. Power switch [POWER] Press to turn ON the power. Press again to turn the power OFF. 2. Power indicator Lights green when the power is switched on. 3. Input 1 – 8 volume controls [INPUT 1 – 8] Adjust the corresponding input signal levels.
5 9 10 21 22 11 12 13 14 15 16 18 19 17 20 [Rear] 9. AC inlet Connect the supplied power cord. 10. Remote control connector Removable terminal block. (1) Remote volume control terminals [REMOTE VOLUME] Connecting a 10 k Ω linear taper volume control across these terminals will allow remote control of preamplifier output and speaker output levels.
6 17. Module input slot Accepts TOA's 900 series module. 18. Functional ground terminal Hum noise may be generated when external equipment is connected to the unit. Connecting this terminal to the functional ground terminal of the external equipment may reduce the hum noise.
7 Over 10 cm Over 10 cm Over 10 cm 7. INST ALLA TION To prevent the internal temperature rise, keep the unit at least 10 cm away from objects that may obstruct air flow. 6.5. External Equipment Connection to the PRE AMP OUT and PWR AMP IN T erminals A-700 series Equalizer , limiter , etc.
8 8. RACK MOUNTING To mount the unit in a standard 19" equipment rack, use the optional MB-25B Rack Mounting Bracket. Attach the MB-25B to the unit using the supplied 4 screws. When using other screws, each screw must be shorter than 16 mm. MB-25B M4 x 16 Machine screw included in MB-25B 9.
9 1 1. BLOCK DIAGRAM INPUT 1 LINE: – 10 dB/600 Ω MIC: – 70 to – 50 dB/600 Ω INPUT 2, 3 LINE: – 10 dB/600 Ω MIC: – 70 to – 50 dB/600 Ω INPUT 4 – 6 LINE: – 10 dB/600 Ω MIC: –.
10 12. SPECIFICA TIONS [A-706] * 0 dB = 1 V Note: The design and specifications are subject to change without notice for improvement. • Accessories • Optional products AC power cord (2 m) ........................................ 1 Removable terminal plug (4 pins) .
11 * 0 dB = 1 V Note: The design and specifications are subject to change without notice for improvement. • Accessories • Optional products AC power cord (2 m) ........................................ 1 Removable terminal plug (4 pins) ...........
133-12-920-9A [A-724] Power Source 120 V AC, 60 Hz Rated Output 240 W Power/Current Consumption 565 W (rated output), 215 W (based on UL60065), under 60 mA (when power switch is OFF) Frequency Respons.
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If you already are a holder of TOA Electronics A-724, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime TOA Electronics A-724.
However, one of the most important roles played by the user manual is to help in solving problems with TOA Electronics A-724. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device TOA Electronics A-724 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
