TOA ElectronicsメーカーBG-1120の使用説明書/サービス説明書
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OPERA TING INSTR UCTIONS MIXER PO WER AMPLIFIER BG-1015 BG-1030 BG-1060 BG-1120 Please follow the instructions in this manual to obtain the optimum results from this unit.
SAFETY PRECA UTIONS • Be sure to read the instructions in this section carefully before use. • Make sure to observe the instructions in this manual as the conventions of safety symbols and messages regarded as very important precautions are included.
3 • Be sure to replace the unit's terminal cover after connection completion. Because high voltage is applied to the 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.
4 T ABLE OF CONTENTS 1. GENERAL DESCRIPTION ............................................................................. 5 2. FEA TURES .......................................................................................................... 5 3. NOMENCLA TURE AND FUNCTIONS Front .
5 1. GENERAL DESCRIPTION TOA's BG-1015, BG-1030, BG-1060, and BG-1120 Mixer Power Amplifiers can mix up to a total of 5 independent input signals. Power output is rated at 15 W for the BG-1015, 30 W for the BG-1030, 60 W for the BG-1060, and 120 W for the BG-1120.
6 1 3 2 4 5 6 7 8 9 INTEGRATED AMPLIFIER BG-1120 PROGRAM 10 0 TEL 01 0 0 MIC 10 10 00 1 0 AUX MODULE SIGNAL OFF POWER PEAK ON This figure represents the BG-1120. 3. NOMENCLA TURE AND FUNCTIONS [Front] 1. Power switch Press to turn ON the power. Press again to turn the power OFF.
7 10. Power cord Connect this cord to an AC outlet of 120 V AC. 11. Ground terminal A functional ground terminal. 12. AC outlet [UNSWITCHED] Continuously supplies up to 500 W of AC power to connected external equipment. 13. Breaker [UNIT] Cuts off the AC power to the unit when its input current exceeds the allowable value.
8 20. 1 W output volume control Adjusts the 1 W OUTPUT level. Rotate clockwise to increase and counterclockwise to decrease. 21. MOH output volume control Adjusts the MOH (Music On-Hold) output signal level. Rotate clockwise to increase and counterclockwise to decrease.
9 5. OUTPUT CONNECTIONS [Output terminals] Each amplifier has 3 speaker outputs: 4 Ω , 25 V and 70 V. Use only one of these outputs for connection. Class 2 wiring may be used. Note: The impedance in the figure below represents the total impedance of the speaker system.
10 6.2. Module Selector Switch Settings Set the rear panel-mounted Module Selector Switch to either the PAGE or BGM position, depending on the output terminal to which the module signal is to be sent. PAGE: Signals from the installed module are only sent to the speaker outputs.
11 [Muted signal settings] Use the unit's internal jumper switch JP301 to select the signal to be muted. Select either the input signal from the TEL, MIC, and MODULE (PAGE) terminals or from the AUX, PROGRAM, and MODULE (BGM) terminals as the signal to be muted.
12 7.5. Changing MIC and PR OGRAM Input T ypes Both MIC and PROGRAM inputs can be changed from electronically-balanced to transformer-balanced types in the procedures as follows. 7.5.1. MIC input • Install an optional IT-450 Line Transformer in the specified location on the printed circuit board.
13 7.5.2. Program input • Install an optional IT-453A Line Transformer in the specified location on the printed circuit board. • Cut off the JP205 and JP206 jumper wires.
14 10. CONTR OL SETTINGS Output levels are adjustable with individual volume controls. For music play or announcement, adjust the corresponding volume control so that the signal indicator lights intermittently. Note that the sound quality is downgraded when the peak indicator remains lit.
15 Mic – 60 dB/600 Ω Balanced Tel – 20 dB/10 k Ω Mute Module AUX – 10 dB/47 k Ω Program – 10 dB/10 k Ω IN OUT Option EBA I.T. Module 10 k Ω JP204 JP208 JP207 JP209 600 Ω ON OFF Phantom Power (DC 24 V) Option EBA I.T. I.T. Mic Vol. Tel Vol.
BG-1015 BG-1030 BG-1060 BG-1120 120 V AC, 60 Hz 15 W 30 W 60 W 120 W 50 W 80 W 160 W 260 W 40 W 60 W 100 W 150 W 50 – 20,000 Hz 0.05% at 1 kHz, rated output Mic: – 60 dB* 1 , 600 Ω , electricall.
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TOA Electronics BG-1120を既にお持ちだが、まだ読んでいない場合は、上記の理由によりそれを行うべきです。そうすることにより機能を適切に使用しているか、又はTOA Electronics BG-1120の不適切な取り扱いによりその寿命を短くする危険を犯していないかどうかを知ることができます。
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