ParasoundメーカーA 52の使用説明書/サービス説明書
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A 5 2 Amplif ier Owner’ s Guide.
THANK YOU! Congratulations and Thank Y ou for Choosing Parasound Y our new P arasound Halo Series A 52 pow er amplifier presents the latest advancements in amplifier tec hnology . The A 52 is built to the strict qualit y and performance standards set by P arasound.
T ABLE OF CONTENTS A 52 Amplifier PLACEMENT GUIDELINES FOR YOUR A 52 2 CONNECTING A SURROUND CONTROLLER TO THE BALANCED INPUTS ON YOUR A 52 3 CONNECTING A SURROUND CONTROLLER TO THE UNBALANCED INPUTS .
PLACEMENT GUIDELINES FOR YOUR A 52 Power amplifiers are usually heavier and generate more heat than other components. T o avoid damage to the A 52 or other equipment and to reduce risk of fire, you must follow these guidelines: • Place the A 52 on a separate shelf that will adequately support its w eight.
CONNECTING A SURROUND CONTROLLER TO THE BALANCED INPUTS ON YOUR A 52 Left and Right Balanced Input Jacks Balanced connections will giv e you the best sound. If y our surround controller has balanced XLR output jac ks, we recommend that you connect them to these inputs.
CONNECTING A SURROUND CONTROLLER TO THE UNBALANCED INPUTS ON YOUR A 52 4 Ch 1-5 Unbalanced Inputs Use these inputs if your sur round controller doesn ’ t ha ve balanced output connectors or if y ou simply pref er to use unbalanced connections.
CONNECTING YOUR SPEAKERS TO THE A 52 5 Stripped AWG wire Dual Banana Plug Common Speaker Connect ors Single Banana Plug Spade Lug Speaker T erminals The A 52 speaker terminals accept speak er wires with banana plugs, spade lugs, or bare ends.
Y ou can manually turn the A 52 on and off with its front panel On-Off button. It can also be triggered to turn on and off automatically when your preamplifier , surround controller , or system controller is turned on and off.
CONNECTING AN EXTERNAL DC SOURCE FOR AUTOMA TIC TURN ON-OFF T o automatically turn on and off the A 52 with an external DC voltage, choose the DC T riggering option by moving the Auto T urn On switch on the rear panel to its lower 12 V position. What Y ou ’ ll Need: • A cable with a 2.
CONNECTING THE A 52 TO TRIGGER ANOTHER COMPONENT Whenever the A 52 is turned on either manually or automatically , there is 12 Vdc present at its own DC T rigger Out jack so it can trigger additional amplifiers or other components on and off. What Y ou ’ ll Need: • A wire with a 2.
a AC Present Indication When the A 52 is plugged into a liv e A C outlet, a sof t blue halo glows behind its On-Of f but ton and its red “ P ” Badge glo ws faintly . These indicate that the unit is plugged into a liv e A C outlet, even when it is t urned off .
CONNECTING THE A 52 AC POWER CORD AC Power Connections W e recommend that you plug y our A 52 into the same A C wall outlet or pow er strip that pow- ers your other audio components, especially the preamplifier or sy stem controller . Having all the audio components on the same pow er circuit helps prev ent hum caused by possible ground loops.
Y our Parasound A 52 power amplifier requires no periodic maintenance and has no user - serviceable parts inside. T o avoid the risk of electric shock, do not remove its top cover . The amplifier ’ s exterior can easily be cleaned with a soft cloth pre-moistened only with a fewdrops of water or glass cleaner .
TROUBLESHOOTING GUIDE 12 No pow er Auto turn on doesn’ t function with a trigger voltage Auto turn on doesn’ t function with an audio input signal A 52 will not turn of f when audio signal is remo.
If All Else Fails – Call Us for Help Call your P arasound dealer or Parasound ’ s T ec hnical Ser vice Department toll free at 1 -866-770-TECH (8324) .
TECHNICALL Y SPEAKING 14 Audio T rigger Sensitivity Adjustment The Audio Sensitivity Control sets the threshold of the audio trigger signal. Y ou can adjust this lev el from a maximum sensitivity of 50 mV (fully countercloc kwise) to a minimum sensitivity of 250 mV (fully cloc kwise).
TECHNICALL Y SPEAKING continued 15 The ideal of z ero voltage ground for all the compo- nents in a system is practically impossible, because some resistance bet w een the ground points of diff er- ent components is inevitable.
P ARASOUND A 52 DESIGN OVERVIEW 16 Circuit Designed by John Curl P arasound design consult ant J ohn Curl has been a legend among audiophiles and electronic engineers for decades.
P ARASOUND A 52 DESIGN OVERVIEW continued 17 The Driver Stage The driv er stage provides critical amplification for whic h we emplo y a complementar y matc hed pair of MOSFETs selected f or their tube-lik e sonic qualities. MOSFETs tend to generate less odd-order harmonic distortion than bipolar transistors.
P ARASOUND A 52 SPECIFICA TIONS 18 Power Output - All Channels Driven 1 25 wat ts RMS x 5, continuous, 20 Hz - 20 kHz, 8 W 225 wat ts RMS x 5, continuous, 20 Hz - 20 kHz, 4 W Current Capacity 30 amper.
Parasound Pr oducts, Inc. 950 Batter y Str eet, San Francisco , CA 94111 415-397-7100 / Fax 415-397-0144 www .parasound.com.
デバイスParasound A 52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：
Parasound A 52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Parasound A 52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。Parasound A 52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。Parasound A 52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。
Parasound A 52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Parasound A 52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、Parasound A 52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Parasound A 52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。
