Manuale d’uso / di manutenzione del prodotto DA-250DH CU del fabbricante Toa
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DUAL POWER AMPLIFIERS DA-250D CU DA-250DH CU Thank you for purchasing TOA's Dual 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. IMPORT ANT SAFETY INSTRUCTIONS .................................................... 3 2. SAFETY PRECAUTIONS ............................................................................... 4 3. GENERAL DESCRIPTION ..............
3 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.
4 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.
5 • 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.
6 3. GENERAL DESCRIPTION TOA's DA-250D and DA-250DH Dual Power Amplifiers feature high power handling capabilities and durability. The DA-250D is configured with 250 W x 2 channels (4 Ω output) and 170 W x 2 channels (8 Ω output), and the DA-250DH features a 250 W x 2 channels (19.
Rack mounting screws are not supplied with the unit. Be sure to use the screws with a diameter of over 5 mm (0.2") and length of over 12 mm (0.47") to mount the unit. Failure to do so may cause personal injury. CAUTION 6. INST ALLA TION PRECAUTIONS 7 • The supplied power supply cord is designed for exclusive use with this unit.
8 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, CH 2] Adjust the input level of each channel. 4.
9 [Rear] 6 7 9 10 11 DA-250D DA-250DH 8 6 7 9 10 11 8 6. AC inlet Connect the supplied power cord to this inlet. 7. Functional ground terminal [SIGNAL GND] 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.
10 Step 1. Switch off the unit's power. Step 2. Set the BRIDGE ON/OFF switch and CH 1 mode ON/OFF switch. Step 3. Connect the sound source equipment to the Input terminals. Note: Refer to p. 12 for the removable terminal plug connection. Step 4. Connect speakers to the Speaker output terminals.
11 CH2 CH1 Speaker output terminals Switch BRIDGE CH 1 mode OFF OFF Setting 4 – 8 Ω 4 – 8 Ω 19.6 Ω 19.6 Ω CH1 CH1 CH2 CH2 DA-250D DA-250DH [2 inputs - 2 outputs] (factory-preset) Speaker output terminals Switch BRIDGE CH 1 mode ON OFF Setting 8 Ω 39.
Cable end treatment 12 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.) Tip Recommended slotted screwdriver type: Screwdriver with blade that is 3 mm (0.
13 The Input sensitivity can be set to +4 dB (factory-preset) or -10 dB for each channel. Besides, only the DA-250DH employs the High-pass filter on each channel, which can be set to "ON" or "OFF." Step 1. Unscrew 7 screws securing the top cover of the unit, then detach it.
14 1 1. 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.
15 13. 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.
16 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 jumper (+4 dB/ - 10 dB) CH 1 inpu.
17 15. DIMENSIONAL DIAGRAM Unit: mm (inches) 401.8 (15.82) 371 (14.61) 22.5 (0.89) 482 (18.98) 465 (18.31) 442 (17.4) 31.8 (1.25) 44 (1.73).
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) .......................
19 * 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) .......................
133-22-125-50 URL: http://www.toa.jp/.
Un punto importante, dopo l’acquisto del dispositivo (o anche prima di acquisto) è quello di leggere il manuale. Dobbiamo farlo per diversi motivi semplici:
Se non hai ancora comprato il Toa DA-250DH CU è un buon momento per familiarizzare con i dati di base del prodotto. Prime consultare le pagine iniziali del manuale d’uso, che si trova al di sopra. Dovresti trovare lì i dati tecnici più importanti del Toa DA-250DH CU - in questo modo è possibile verificare se l’apparecchio soddisfa le tue esigenze. Esplorando le pagine segenti del manuali d’uso Toa DA-250DH CU imparerai tutte le caratteristiche del prodotto e le informazioni sul suo funzionamento. Le informazioni sul Toa DA-250DH CU ti aiuteranno sicuramente a prendere una decisione relativa all’acquisto.
In una situazione in cui hai già il Toa DA-250DH CU, ma non hai ancora letto il manuale d’uso, dovresti farlo per le ragioni sopra descritte. Saprai quindi se hai correttamente usato le funzioni disponibili, e se hai commesso errori che possono ridurre la durata di vita del Toa DA-250DH CU.
Tuttavia, uno dei ruoli più importanti per l’utente svolti dal manuale d’uso è quello di aiutare a risolvere i problemi con il Toa DA-250DH CU. Quasi sempre, ci troverai Troubleshooting, cioè i guasti più frequenti e malfunzionamenti del dispositivo Toa DA-250DH CU insieme con le istruzioni su come risolverli. Anche se non si riesci a risolvere il problema, il manuale d’uso ti mostrerà il percorso di ulteriori procedimenti – il contatto con il centro servizio clienti o il servizio più vicino.