1. परिचय
This manual provides essential information for the safe and efficient operation of your TOA A-848D Mixer/Digital Amplifier. Please read this manual thoroughly before use and retain it for future reference. The A-848D is a versatile mixer amplifier designed for various audio applications, offering up to eight inputs and 480W of power, with features like IP control and onboard DSP.
2. महत्त्वाच्या सुरक्षितता सूचना
- उर्जा स्त्रोत: Connect the unit only to a 120 V AC, 60 Hz power supply. Ensure the power cord is securely plugged in.
- वायुवीजन: वायुवीजन उघड्या जागा अडवू नका. जास्त गरम होण्यापासून रोखण्यासाठी युनिटभोवती पुरेसा वायुप्रवाह सुनिश्चित करा.
- ओलावा: Do not expose the unit to rain or moisture. Avoid placing objects filled with liquids, such as vases, on the apparatus.
- परदेशी वस्तू: युनिटच्या उघड्या भागात कोणतीही वस्तू घालू नका.
- सर्व्हिसिंग: सर्व सेवा पात्र सेवा कर्मचाऱ्यांना द्या. हे उत्पादन स्वतः सर्व्ह करण्याचा प्रयत्न करू नका.
- ग्राउंडिंग: इलेक्ट्रिक शॉक टाळण्यासाठी योग्य ग्राउंडिंगची खात्री करा.
3. पॅकेज सामग्री
पॅकेजमध्ये सर्व वस्तू आहेत का ते तपासा:
- TOA A-848D मिक्सर/डिजिटल Ampअधिक जिवंत
- पॉवर कॉर्ड
- Removable Terminal Blocks (various sizes for inputs/outputs)
- वापरकर्ता मॅन्युअल (हा दस्तऐवज)
4. उत्पादन संपलेview
4.1 फ्रंट पॅनेल
Figure 4.1: Front Panel of the TOA A-848D. This image displays the front of the amplifier, featuring six input level controls, two module level controls, Bass and Treble tone controls, a Master volume knob, and a power button. An LED display shows output levels, and status indicators for Error, Over Current, Thermal Protect, LAN Connect, Emergency, Priority, and CPU Run are visible.
- INPUT 1-6 Level Controls: Adjust the input level for each of the six audio inputs.
- MODULE 1-2 Level Controls: Adjust the input level for optional 900 Series modules.
- BASS/TREBLE Tone Controls: Adjust the low and high frequency response of the output.
- मास्टर खंड नियंत्रण: एकूण आउटपुट व्हॉल्यूम समायोजित करा.
- पॉवर बटण: युनिट चालू किंवा बंद करते.
- LED Level Meter: Displays the output signal level.
- स्थिती निर्देशकः LEDs for Error, Over Current, Thermal Protect, LAN Connect, Emergency, Priority, and CPU Run.
4.2 मागील पॅनेल
Figure 4.2: Rear Panel of the TOA A-848D. This image shows the rear connections, including the AC power inlet, speaker outputs, remote control terminals, various input terminals (MIC/LINE, phantom power switches), LAN port, pre-amp out, and slots for two 900 Series modules. Dip switches for module settings are also visible.
- एसी पॉवर इनलेट: पुरवठा केलेला पॉवर कॉर्ड येथे जोडा.
- स्पीकर आउटपुट: Terminals for connecting loudspeakers.
- POWER REMOTE OUT: For remote power control.
- EMERGENCY OUT: For emergency system integration.
- INPUT 1-4 (MIC/LINE): Electronically-balanced removable terminal blocks. Phantom power (24V DC) is switchable for INPUT 1-4.
- INPUT 5-6 (MIC/LINE/RCA): Electronically-balanced removable terminal blocks for MIC, or unbalanced RCA pin jacks for LINE.
- लॅन पोर्ट: For network connection and IP control.
- आरईसी आउट: RCA output for recording.
- प्री AMP बाहेर: RCA output for connecting to an external power ampलाइफायर
- MODULE 1-2 Slots: Bays for installing optional 900 Series modules.
- डीआयपी स्विचेस: Various switches for configuring module functions, phantom power, and input types.
5. सेटअप आणि स्थापना
- प्लेसमेंट: ठेवा amplifier on a stable, level surface with adequate ventilation. Avoid direct sunlight, heat sources, and excessive dust or moisture.
- स्पीकर कनेक्शन: Connect your loudspeakers to the appropriate speaker output terminals on the rear panel. Ensure correct polarity (+ to + and - to -). Refer to the speaker impedance and power handling specifications.
- इनपुट डिव्हाइस कनेक्शन:
- For microphones or line-level devices, connect to INPUT 1-6 using the removable terminal blocks.
- If using condenser microphones, activate the phantom power switch for the corresponding input on the rear panel.
- For line-level devices with RCA outputs, use INPUT 5 or 6 RCA jacks.
- Module Installation (Optional): If using 900 Series modules, carefully insert them into MODULE 1 or 2 slots on the rear panel. Configure the associated DIP switches as required by the module's instructions.
- नेटवर्क कनेक्शन (पर्यायी): For IP control and monitoring, connect an Ethernet cable from your network router/switch to the LAN port.
- वीज कनेक्शन: Ensure all audio connections are made before connecting the power cord. Plug the supplied power cord into the AC Power Inlet on the rear panel, then into a suitable 120 V AC, 60 Hz wall outlet.
6. ऑपरेटिंग सूचना
- पॉवर चालू: Press the Power button on the front panel. The unit's indicators will illuminate.
- Initial Volume Settings: Before playing audio, set all INPUT level controls and the MASTER volume control to their minimum positions.
- Adjusting Input Levels:
- Start playing audio from your source device.
- Slowly increase the corresponding INPUT level control until the LED level meter shows a healthy signal without clipping (avoiding the red segment).
- Adjusting Master Volume: Once individual input levels are set, slowly increase the MASTER volume control to achieve the desired overall output level.
- टोन नियंत्रण: Use the BASS and TREBLE controls to fine-tune the audio's low and high frequencies to suit your preference or room acoustics.
- IP Control (if connected): प्रवेश करा ampलाइफायरचे web interface via its IP address (refer to network setup instructions for details) to configure advanced settings, monitoring, and remote control.
- वीज बंद: To turn off the unit, press the Power button.
7. देखभाल
- स्वच्छता: Disconnect the power cord before cleaning. Use a soft, dry cloth to wipe the exterior of the unit. Do not use liquid cleaners or aerosols.
- वायुवीजन: Periodically check that the ventilation openings are clear of dust and debris.
- स्टोरेज: जर युनिट जास्त काळ साठवत असाल तर ते वीज बंद करा आणि थंड, कोरड्या जागी ठेवा.
8. समस्या निवारण
| समस्या | संभाव्य कारण | उपाय |
|---|---|---|
| शक्ती नाही | Power cord not connected; Power outlet faulty; Unit fuse blown. | Check power cord connection; Try a different outlet; Contact service personnel for fuse replacement. |
| आवाज आउटपुट नाही | Master volume too low; Input level too low; Speaker connections incorrect; Mute function active; Source device not playing. | Increase Master volume; Increase input level; Check speaker wiring and polarity; Check for mute settings (if applicable); Verify source device operation. |
| विकृत आवाज | Input level too high (clipping); Speaker impedance mismatch; Faulty cable. | Reduce input level; Ensure speaker impedance matches amplifier; Replace audio cables. |
| गुंजन किंवा आवाज | Ground loop; Poor cable shielding; Nearby electrical interference. | Ensure proper grounding; Use shielded cables; Move unit away from interference sources. |
| Thermal Protect LED active | Unit overheating due to blocked ventilation or excessive load. | Turn off unit, allow to cool; Ensure ventilation is clear; Reduce output load if possible. |
या उपाययोजना करूनही समस्या कायम राहिल्यास, कृपया पात्र सेवा कर्मचाऱ्यांशी संपर्क साधा.
9. तपशील
| वैशिष्ट्य | तपशील |
|---|---|
| मॉडेल | ए -848 डी |
| उर्जा स्त्रोत | 120 व्ही एसी, 60 हर्ट्ज |
| रेटेड आउटपुट | 480 प |
| वीज वापर | 621 W (rated output), 103 W (UL62368), 200 mA or less (power OFF) |
| वारंवारता प्रतिसाद | 50 Hz to 20 kHz ±3 dB (1/8 rated output) |
| विकृती | 1 % or less at 1 kHz, rated power |
| टोन नियंत्रण | बास: 10 Hz वर ±100 dB, ट्रेबल: 10 kHz वर ±10 dB |
| सिग्नल ते नॉइज रेशो | 88 dB or more (Master min), 76 dB or more (Master max), 55 dB or more (INPUT 1 to 6) (A-weighted) |
| Inputs 1, 2 | -60 dB (MIC)/-20 dB (LINE) selectable, 600 Ω, electronically-balanced, removable terminal block (3.81 mm, 3 pins). Phantom power (24 V DC, ON/OFF switchable). |
| Inputs 3, 4 | -60 dB, 600 Ω, electronically-balanced, removable terminal block (3.81 mm, 3 pins). Phantom power (24 V DC, ON/OFF switchable). |
| Inputs 5, 6 | MIC: -60 dB, 600 Ω, electronically-balanced, removable terminal block (3.81 mm, 3 pins). LINE: -20 dB, 10 kΩ, unbalanced, RCA pin jack x 2. |
| ऑपरेटिंग आर्द्रता | 85% RH किंवा त्यापेक्षा कमी (संक्षेपण नाही) |
| समाप्त करा | पॅनेल: एबीएस राळ, काळा |
| आयटम वजन | 11.9 पाउंड |
| चॅनेलची संख्या | 8 |
| कनेक्टिव्हिटी तंत्रज्ञान | सहाय्यक |
10. हमी आणि समर्थन
For warranty information and technical support, please refer to the documentation provided with your purchase or visit the official TOA website. Do not attempt to repair the unit yourself, as this may void your warranty.
