Gebruiksaanwijzing /service van het product A 51 van de fabrikant Parasound
Ga naar pagina of 20
A 5 1 Amplif ier Owner’ s Guide.
Congratulations and Thank Y ou for Choosing Parasound Y our new P arasound Halo Series A 51 pow er amplifier presents the latest advancements in amplifier tec hnology . The A 51 is built to the strict qualit y and performance standards set by P arasound.
T ABLE OF CONTENTS A 51 Amplifier PLACEMENT GUIDELINES FOR YOUR A 51 2 CONNECTING A SURROUND CONTROLLER TO THE BALANCED INPUTS ON YOUR A 51 3 CONNECTING A SURROUND CONTROLLER TO THE UNBALANCED INPUTS .
PLACEMENT GUIDELINES FOR YOUR A 51 Power amplifiers are usually heavier and generate more heat than other components. T o avoid damage to the A 51 or other equipment and to reduce risk of fire, you must follow these guidelines: • A cable with a 2.5 mm sub-mini plug on eac h end (provided).
CONNECTING A SURROUND CONTROLLER TO THE BALANCED INPUTS ON YOUR A 51 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 51 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 51 Speaker T erminals The A 51 speaker terminals accept speak er wires with banana plugs or bare ends. Ref er to Bare W ire Speaker T ermination in the T echnically Speaking section f or information about bare wire termination.
MANUAL AND AUTOMA TIC TURN ON-OFF OPTIONS Y ou can manually turn the A 51 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 51 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 1 2 V position. What Y ou ’ ll Need: • A cable with a 2.
UNDERST ANDING THE INDICA TORS ON THE A 51 a AC Present Indication When the A 51 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 51 AC POWER CORD AC Power Connections W e recommend that you plug y our A 51 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.
MAINT AINING YOUR A 51 Y our Parasound A 51 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 few drops of water or glass cleaner .
TROUBLESHOOTING GUIDE 11 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 51 will not turn of f when audio signal is remo.
SERVICING YOUR A 51 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). W e can of ten solve the problem with simple diagnostic tests y ou can per- form y ourself .
TECHNICALL Y SPEAKING 13 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 14 hum (or 50 Hz hum in regions with 50 Hz A C). T he harmonics of these frequencies (1 20 Hz, 240 Hz, 480 Hz or 1 00 Hz, 20 0 Hz, 400 Hz) may add buzz in addi- tion to the hum.
P ARASOUND A 51 DESIGN OVERVIEW 15 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 51 DESIGN OVERVIEW continued 16 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 51 SPECIFICA TIONS Power Output - All Channels Driven 250 wat ts RMS x 5, continuous, 20 Hz - 20 kHz, 8 Ω 400 wat ts RMS x 5, continuous, 20 Hz - 20 kHz, 4 Ω Current Capacity 60 amper.
Parasound Pr oducts, Inc. 950 Batter y Str eet, San Francisco , CA 94111 415-397-7100 / Fax 415-397-0144 www .parasound.com.
Een belangrijk punt na aankoop van elk apparaat Parasound A 51 (of zelfs voordat je het koopt) is om de handleiding te lezen. Dit moeten wij doen vanwege een paar simpele redenen:
Als u nog geen Parasound A 51 heb gekocht dan nu is een goed moment om kennis te maken met de basisgegevens van het product. Eerst kijk dan naar de eerste pagina\'s van de handleiding, die je hierboven vindt. Je moet daar de belangrijkste technische gegevens Parasound A 51 vinden. Op dit manier kan je controleren of het apparaat aan jouw behoeften voldoet. Op de volgende pagina's van de handleiding Parasound A 51 leer je over alle kenmerken van het product en krijg je informatie over de werking. De informatie die je over Parasound A 51 krijgt, zal je zeker helpen om een besluit over de aankoop te nemen.
In een situatie waarin je al een beziter van Parasound A 51 bent, maar toch heb je de instructies niet gelezen, moet je het doen voor de hierboven beschreven redenen. Je zult dan weten of je goed de alle beschikbare functies heb gebruikt, en of je fouten heb gemaakt die het leven van de Parasound A 51 kunnen verkorten.
Maar de belangrijkste taak van de handleiding is om de gebruiker bij het oplossen van problemen te helpen met Parasound A 51 . Bijna altijd, zal je daar het vinden Troubleshooting met de meest voorkomende storingen en defecten #MANUAl# samen met de instructies over hun opplosinge. Zelfs als je zelf niet kan om het probleem op te lossen, zal de instructie je de weg wijzen naar verdere andere procedure, bijv. door contact met de klantenservice of het dichtstbijzijnde servicecentrum.
