Vizio DA-250F CU инструкция обслуживания

MUL TICHANNEL POWER AMPLIFIERS DA-250F CU DA-250FH CU 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. Note: The figure shows the DA-250F. OPERA TING INSTRUCTIONS An all-pole mains switch with a contact separation of at least[...]

2 T ABLE OF CONTENTS 1. IMPORT ANT SAFETY INSTRUCTIONS .................................................... 3 2. SAFETY PRECAUTIONS ............................................................................... 4 3. GENERAL DESCRIPTION ............................................................................. 6 4. FEA TURES ....................[...]

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. Install in accordance with the manufacturer's instructions. • Do not install near[...]

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. • Do not cut, [...]

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. • Avoid installing the unit in humid or dusty locations, in l[...]

6 3. GENERAL DESCRIPTION TOA's DA-250F and DA-250FH Multichannel Power Amplifiers feature high power handling capabilities and durability. The DA-250F is configured with 250 W x 4 channels (4 Ω output) and 170 W x 4 channels (8 Ω output), and the DA-250FH features a 250 W x 4 channels (70 V line, 19.6 Ω output) configuration. Besides, each [...]

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. Never us[...]

8 1. Power switch [ ON / OFF] Turning this switch on causes the amplifier to function, and turning it off causes the amplifier to cease function. Note: The unit is not completely disconnected from the power supply even if this Power switch is turned off. 2. Power indicator [POWER] Lights blue when the Power switch (1) is turned on. 3. Input level c[...]

9 [Rear] 6 7 8 DA-250F 9 9 10 11 6 7 8 DA-250FH 9 9 10 11 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. 7. Functional ground terminal [SIGNAL GND] Hum noise may be generated when external equipment is connected to the[...]

10 Step 1. Turn off this unit's Power switch. Step 2. Set the BRIDGE ON/OFF switches 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. 4-1. Unscrew the output terminal cover. 4[...]

11 CH4 - + CH3 - + CH2 - + CH1 - + [1 input - 4 outputs] CH1 CH1 CH2 CH3 CH4 – + – + – + – + Switch BRIDGE 1 BRIDGE 2 CH 1 mode OFF OFF ON Setting Speaker output terminals 4 – 8 Ω 4 – 8 Ω 4 – 8 Ω 4 – 8 Ω 19.6 Ω 19.6 Ω 19.6 Ω 19.6 Ω DA-250F DA-250FH BRIDGE 1 BRIDGE 2 [2 inputs - 2 outputs] CH1 CH3 CH1 CH2 CH3 CH4 Speaker outp[...]

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 (0.12") in width T ightens Loosens T erminal screw Slotted screwdriver Shielded cable Remo[...]

13 10. INPUT SENSITIVITY AND HIGH-P ASS FIL TER ON/OFF SETTINGS The Input sensitivity can be set to +4 dB (factory-preset) or –10 dB for each channel. Besides, only the DA-250FH employs the High-pass filter on each channel, which can be set to "ON" or "OFF." Step 1. Remove this unit's power plug from an AC outlet. Step 2.[...]

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. Short circuit Current limiter activated. Load is di[...]

15 13. CLEANING THE FIL TER Step 1. Turn off this unit's Power switch. 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. Ventilation Panel 2 3 Filter Ventilation Panel Detach the panel by pressi[...]

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 input level control +4 dB - 10 dB CH 2 sensitivity selection jumper (+4 dB/ - 10 dB) CH 2 input level control ON OFF BRIDGE 1 ON/OFF switch + - BRIDGE 1 O[...]

17 14.2. DA-250FH OFF ON CH 2 HPF ON/OFF jumper HPF 50 Hz OFF ON CH 3 HPF ON/OFF jumper HPF 50 Hz OFF ON CH 4 HPF ON/OFF jumper HPF 50 Hz 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 input level control[...]

18 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)[...]

19 * 0 dB = 0.775 V Note: The design and specifications are subject to change without notice for improvement. Power cord (2 m or 6.56 ft) .................................................. 1 Removable terminal plug (3 pins) ........................................ 4 Tamper-proof cap ................................................................ 4[...]

133-22-027-0B URL: http://www.toa.jp/ * 0 dB = 0.775 V Note: The design and specifications are subject to change without notice for improvement. Power cord (2 m or 6.56 ft) .................................................. 1 Removable terminal plug (3 pins) ........................................ 4 Tamper-proof cap ...............................[...]