1. تعارف
This manual provides essential information for the proper setup, operation, and maintenance of your Crown D-75A D Series Power Amplifier. The D-75A is a robust and reliable power amplifier, widely recognized for its performance in various professional audio environments, including laboratories, touring setups, public facilities, recording studios, and home audio systems. It delivers up to 110 watts into 8 ohms of power.
2. حفاظت جي ڄاڻ
Please read and understand all safety instructions before operating the ampزندگي ڏيندڙ. مستقبل جي حوالي لاءِ هن دستور کي برقرار رکو.
- طاقت جو ذريعو: ڳنڍيو amplifier only to the type of power source indicated on the unit. Ensure the AC line has a standard three-wire grounded connector.
- وينٽيليشن: ڪنهن به وينٽيليشن جي سوراخن کي نه روڪيو. يونٽ جي چوڌاري مناسب هوا جي وهڪري کي يقيني بڻايو وڃي ته جيئن وڌيڪ گرم ٿيڻ کان بچي سگهجي.
- نمي: بي نقاب نه ڪريو amplifier to rain or moisture. Do not place objects filled with liquids, such as vases, on the apparatus.
- خدمت ڪرڻ: ھن پراڊڪٽ کي پنھنجي خدمت ڪرڻ جي ڪوشش نه ڪريو. س servني خدمتن جو حوالو ڏيو قابل سروس اهلڪارن کي.
- صفائي: صفائي ڪرڻ کان اڳ يونٽ کي پاور آئوٽليٽ مان ڪڍو. صفائي لاءِ سڪل ڪپڙو استعمال ڪريو.
3. پراڊڪٽ ختمview
The Crown D-75A D Series Power Amplifier is designed for high-fidelity audio amplification. Its AB+B class circuitry ensures maximum efficiency with minimal crossover distortion.
اهم خاصيتون:
- Balanced three-pin Neutrik combination XLR and 1/4" phone jack for each channel.
- Four-terminal barrier block (two per channel) for speaker connections.
- Stereo headphone jack for monitoring.
- AC line with a standard three-wire grounded connector.
- Powerful AB+B class circuitry for efficient operation.
فرنٽ پينل ڪنٽرول ۽ اشارا:
Figure 3.1: Crown D-75A Front Panel. This image displays the front panel of the Crown D-75A D Series Power Amplifier. From left to right, it features a headphone jack, a 'LEVEL' control knob for Channel 1, a 'SIGNAL' indicator light for Channel 1, a 'LEVEL' control knob for Channel 2, a 'SIGNAL' indicator light for Channel 2, the 'crown D-75A' logo, a red power indicator light, and a 'POWER' switch with 'OFF' and 'ON' positions.
4. سيٽ اپ
Follow these steps to properly set up your Crown D-75A ampزنده:
- لڳائڻ: پوزيشن کي amplifier in a location with adequate ventilation, away from direct sunlight, heat sources, and moisture. Ensure it is placed on a stable surface.
- ان پٽ ڪنيڪشن: Connect your audio source (e.g., mixer, preamplifier) ڏانهن amplifier's input jacks. The D-75A features balanced three-pin Neutrik combination XLR and 1/4" phone jacks for each channel. Use appropriate cables for your source.
- Connectاھر ڪنيڪشن: Connect your speakers to the four-terminal barrier block outputs on the rear of the amplifier. Ensure correct polarity (+ to + and - to -) for each channel.
- پاور ڪنيڪشن: کي يقيني بڻايو amplifier's power switch is in the 'OFF' position. Connect the AC power cord to a grounded electrical outlet. The amplifier requires a standard three-wire grounded connection.
- Initial Level Settings: Before powering on, set both Channel 1 and Channel 2 'LEVEL' control knobs to their minimum (fully counter-clockwise) position.
5. آپريٽنگ هدايتون
هڪ دفعو جي ampلائفائر سيٽ اپ ٿي ويو آهي، آپريشن لاءِ انهن قدمن تي عمل ڪريو:
- پاور آن: Flip the 'POWER' switch to the 'ON' position. The red power indicator light on the front panel will illuminate.
- سطحن کي ترتيب ڏيو: Start playing audio from your source. Slowly turn the 'LEVEL' control knobs clockwise for Channel 1 and Channel 2 until the desired volume is achieved.
- سگنل اشارا: Observe the 'SIGNAL' indicator lights for each channel. These lights illuminate when an audio signal is present. If the lights are consistently bright or clipping, reduce the input level from your source or the amplifier's level controls to prevent distortion.
- هيڊ فون مانيٽرنگ: For private listening or monitoring, plug stereo headphones into the 'HEADPHONES' jack. The headphone output level is typically controlled by the main level controls.
- بجلي بند: When finished, turn the 'LEVEL' control knobs to their minimum position, then flip the 'POWER' switch to 'OFF'.
6. سار سنڀال
باقاعده سار سنڀال توهان جي ڊگهي عمر ۽ بهترين ڪارڪردگي کي يقيني بڻائي ٿي ampوierيڪ زنده
- صفائي: Periodically clean the exterior of the amplifier with a soft, dry cloth. Do not use liquid cleaners or solvents. Ensure ventilation grilles are free from dust and debris.
- وينٽيليشن: باقاعدي طور تي چيڪ ڪريو ته amplifier's ventilation openings are not obstructed. Proper airflow is crucial to prevent overheating.
- ڪنيڪشن: Occasionally inspect all input and output connections for secure fit and signs of wear. Loose connections can lead to signal loss or intermittent performance.
- اسٽوريج: جيڪڏهن ذخيرو amplifier for an extended period, ensure it is kept in a dry, dust-free environment within its operating temperature range.
7. مسئلا حل ڪرڻ
This section addresses common issues you might encounter with your Crown D-75A ampوierيڪ زنده
| مسئلو | ممڪن سبب | حل |
|---|---|---|
| No power, power indicator off | Power cord disconnected; no power from outlet; faulty power switch. | Check power cord connection; test outlet with another device; if problem persists, seek professional service. |
| ڪوبه آواز ٻاھر نه | Input cables disconnected; speaker cables disconnected or incorrect polarity; amplifier level controls set too low; source device not playing. | Verify all cable connections; ensure speaker polarity is correct; increase amplifier level controls; check audio source. |
| بگڙيل آواز | ان پٽ سگنل تمام گهڻو آهي؛ amplifier overloaded; faulty cables or speakers. | Reduce input level from source; lower amplifier level controls; inspect cables and speakers for damage. |
| گهڻو گرم ٿيڻ | بند ٿيل وينٽيليشن؛ تمام گهڻو لوڊ. | Ensure clear airflow around the unit; reduce output level or check speaker impedance. |
If these troubleshooting steps do not resolve the issue, please contact qualified service personnel.
8. وضاحتون
The following are the technical specifications for the Crown D-75A D Series Power Ampزنده:
- آئوٽ پٽ واٽtage: 110 Watts (into 8 ohms)
- پيداوار جي ماپ: 21.5 x 12.5 x 3 انچ
- شيء جو وزن: 10.9 پائونڊ
- ماڊل نمبر: جي ڊي 75 اي
- ASIN: B0002L8XLU
- برانڊ: تاج
- ٺاهيندڙ: تاج آڊيو
- رنگ: ڀورو
- مطابقت رکندڙ ڊوائيسز: A wide range of professional audio equipment
- تاريخ پهرين دستياب: سيپٽمبر 6، 2007
9. وارنٽي ۽ سپورٽ
For warranty information and technical support, please refer to the official Crown Audio website or contact your authorized Crown dealer. Keep your purchase receipt as proof of purchase for any warranty claims.
