QSC AudioメーカーMX 1500aの使用説明書/サービス説明書
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1 Owner’ s Manual ® A U D I O *TD-000026-00* Rev. B MX 1000a MX 1500a MX 2000a MX 3000a ▲ ▲ ▲ ▲ MXa Series.
2 MXa Series Power Amplifier Operation Manual T ABLE OF CONTENTS I. WARNING NOTICES ................................................. 3 Speaker Damage ....................................................... 3 Speaker Output Shock Hazard ..............
3 I. WARNING NOTICES SPEAKER DAMAGE The MXa Series amplifiers are among the most powerful professional amplifiers available and is capable of pro- ducing much more power than many loudspeakers can handle. It is the user ’ s responsibility to use suitable speakers with the amplifier and to use them in a sensible way that will not cause damage.
4 II. OVERALL DESCRIPTION The MXa Series from QSC comprises four high-effi- ciency professional power amplifier models, each with two independent channels.
5 III. INPUTS An MXa amplifier features balanced inputs, connected via barrier strip terminals or 1/4 ” (6.3 mm) tip/ring/sleeve phone jacks. The tip of the input jack is wired for “ nega- tive ’ or inverted polarity, while the ring is the non-inverting input.
6 IV . OUTPUTS Four “ touch-proof ” binding posts — one pair per chan- nel — on the rear panel allow speaker cable connections to the amplifier outputs. The special design allows con- nection of large diameter speaker cable while reducing shock hazard due to the high output power of MXa amplifiers.
7 TROUBLESHOOTING PROBLEM: Channel will not come out of muting • If reducing the gain control to ∞ attenuation does not release muting, the channel is defective or overheated (see “ Overheating, ” below).
8 SPECIFICATIONS MX 1000a MX 1500a MX 2000a MX 3000a 250 350 450 800 FTC Watts Per Channel 20Hz-20kHz, 0.1% THD EIA Watts Per Channel 1kHz, 1% THD 8 Ω Load 275 400 475 850 8 Ω Load 400 600 725 130.
9 MX 1000a MX 1500a MX 2000a MX 3000a CONNECTORS (each channel) Input: Barrier strip and 1/4 ” RTS phone jack Output: “ Touch-Proof ” binding posts COOLING MX 1000a, MX 1500a, MX 2000a: 2-speed .
10 PARALLEL, STEREO, OR BRIDGED OPERATION The Parallel-Stereo-Bridge switch is located on the input panel, next to the input jack for channel 1). The most commonly used operating mode for a power amplifier is “ Stereo, ” in which the two channels are independent and separate all the way from input to output.
11 VI. LONG-TERM OUTPUT POWER In a properly designed sound system, you can usually obtain the desired sound level without using the full output power of the amplifier; if the “ CLIP ” indicators flash once in a while, that is perfectly normal.
12 HEAT EMISSIONS Essentially, a power amplifier draws electrical energy from the AC mains, converts it to DC, and then converts it again into an analog of the input signal to send out to the loudspeakers.
13 output until it can be repaired, at which time the fuse should be replaced also. Temperature sensors on the channel heatsinks and the power transformers are part of the thermal management circuitry. On the MX 1000a, MX 1500a, and MX 2000a, the temperature sensors govern whether the dual-speed fan should run at low or high speed.
14 File Library QSControl Hardware Support QSControl Software Support EX, MXa, VS, USA, and Series One Slot Accessories General Notes File T ypes Graphics Mechanical drawings Specifications Applicatio.
15 X. IMPOR T ANT ADDRESS AND TELEPHONE INFORMA TION Factory address: QSC Audio Products, Inc. 1675 MacArthur Boulevard Costa Mesa, California 92626-1468 USA Factory telephone numbers: Main Number (714) 754-6175 Sales Direct Line (714) 957-7100 Sales (800) 854-4079 (toll-free in U.
16 ® A U D I O “ QSC ” is a registered trademark of QSC Audio Products, Inc. 1675 MacArthur Blvd. Costa Mesa, CA 92626 (714) 754-6175 FAX (714) 754-6174.
デバイスQSC Audio MX 1500aの購入後に(又は購入する前であっても)重要なポイントは、説明書をよく読むことです。その単純な理由はいくつかあります:
QSC Audio MX 1500aをまだ購入していないなら、この製品の基本情報を理解する良い機会です。まずは上にある説明書の最初のページをご覧ください。そこにはQSC Audio MX 1500aの技術情報の概要が記載されているはずです。デバイスがあなたのニーズを満たすかどうかは、ここで確認しましょう。QSC Audio MX 1500aの取扱説明書の次のページをよく読むことにより、製品の全機能やその取り扱いに関する情報を知ることができます。QSC Audio MX 1500aで得られた情報は、きっとあなたの購入の決断を手助けしてくれることでしょう。
QSC Audio MX 1500a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QSC Audio MX 1500a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。
ですが、ユーザガイドが果たす重要な役割の一つは、QSC Audio MX 1500aに関する問題の解決を支援することです。そこにはほとんどの場合、トラブルシューティング、すなわちQSC Audio MX 1500aデバイスで最もよく起こりうる故障・不良とそれらの対処法についてのアドバイスを見つけることができるはずです。たとえ問題を解決できなかった場合でも、説明書にはカスタマー・サービスセンター又は最寄りのサービスセンターへの問い合わせ先等、次の対処法についての指示があるはずです。