Instruction/ maintenance manual of the product DA-500FH CE TOA Electronics
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OPERA TING INSTRUCTIONS MUL TICHANNEL POWER AMPLIFIERS DA-550F CE DA-500FH CE 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 equipment.
2 T ABLE OF CONTENTS 1. SAFETY PRECAUTIONS ............................................................................... 3 2. GENERAL DESCRIPTION ............................................................................. 4 3. FEA TURES ..........
3 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.
4 2. GENERAL DESCRIPTION TOA's DA-550F Multichannel Power Amplifier features high power handling of 550 W x 4 channels (4 Ω output) or 350 W x 4 channels (8 Ω output) and durability.
5 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 2 or more units in parallel. • Only connect speakers with an impedance equal to or greater than those specified.
6 6. NOMENCLA TURE AND FUNCTIONS [Front] 1. Power switch [ON/OFF] Power is switched on and off with each depression of this switch. 2. Power indicator [POWER] Lights blue when the power is switched on. 3. Input level controls [CH 1 (BRIDGE 1), CH 2, CH 3 (BRIDGE 2), CH 4] Adjust the input level of each channel.
7 DA-550F DA-500FH 7 9 12 9 8 11 10 10 7 9 12 9 8 11 6 6 [Rear] 6. AC inlet Connect the supplied power cord to this inlet. The socket-outlet shall be installed near the equipment and the plug (disconnecting device) shall be easily accessible.
8 Step 1. Switch off the unit's power. Step 2. Set the BRIDGE ON/OFF switches (DA-550F only) and CH 1 mode ON/OFF switch. Step 3. Connect the sound source equipment to the Input terminals. Note: Refer to p. 11 for the removable terminal plug connection.
9 Switch BRIDGE 1 BRIDGE 2 CH 1 mode ON ON ON Setting CH1 CH1 CH2 CH3 CH4 BRIDGE 1 BRIDGE 2 Speaker output terminals 8 Ω 8 Ω - + - + [1 input - 2 outputs] CH1 - + CH2 - + Speaker output terminals Sw.
10 CH3 - + CH4 - + Speaker output terminals Switch BRIDGE 1 BRIDGE 2 CH 1 mode ON OFF ON Setting 8 Ω 4 – 8 Ω 4 – 8 Ω CH1 CH3 CH4 CH1 CH2 BRIDGE 1 - + [1 input - 3 outputs (2)] CH4 - + CH3 - + C.
11 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.
12 10. PROTECTION OPERA TION LIST Failure Protection Operation Indicator Remedy Recovery Overcurrent due to overload Current limiter activated when impedance drops below the specified value. Peak indicator lights. Remove overload. Connecting a correct load automatically restores normal operation.
13 12. CLEANING THE FIL TER Step 1. Switch off the unit's power. Step 2. Remove 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.
14 14. BLOCK DIAGRAMS 14.1. DA-550F H C CH 1 INPUT E H C CH 2 INPUT E Current Limiter Short Detector Protection Circuit OUTPUT 1 relay CH 1 OUTPUT CH 2 OUTPUT +4 dB - 10 dB CH 1 sensitivity selection .
15 15. HOW TO USE THE CONTROL/MONIT OR TERMINALS The Control/Monitor terminals on the rear panel permit power ON/OFF control of the individual channels and monitoring for the power ON/OFF status and protection status on each channel, and fan operation status.
15.3. About Pin 7 of the Control/Monitor T erminals A ground common to all the control and monitor terminals is assigned to Pin 7. Both Pins 7 of the Control/Monitor terminal for CH1 and CH2, and that for CH 3 and CH4 are internally connected to each other.
17 15.6. RJ45 Connector's Pin Arrangement and Cable Color Codes Shielded Category 5 twisted pair cable for LAN (CAT5-STP) RJ45 pin No. To Control/Monitor terminal 1 2 5 6 3 4 7 8 Shield RJ45 pin No.
18 * 0 dB = 0.775 V Note: The design and specifications are subject to change without notice for improvement. Power cord (2 m) ................................................................. 1 Removable terminal plug (3 pins) .......................
Power cord (2 m) ................................................................. 1 Removable terminal plug (3 pins) ........................................ 4 Rack mounting screw (with plain washer) 5 x 12 ................ 4 Tamper-proof cap .......
133-22-103-10 URL: http://www.toa.jp/ Traceability Information for Europe (EMC directive 2004/108/EC) Manufacturer: TOA Corporation 7-2-1, Minatojima Nakamachi, Chuo-ku, Kobe, Hyogo, Japan Authorized .
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