Parasound A 31 manual Are You Having Difficulty?, Repair or Service

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Are You Having Difficulty?

Repair or Service

Call your Parasound dealer first. If the dealer can’t help you with your problem we encourage you to call Parasound’s Technical Service Department at 415 397 7100, Monday - Friday, 8am - 4pm Pacific Time. We can suggest other diagnostic tests you can easily perform.

If we determine that your A 31 should be returned to Parasound or an Authorized Parasound Warranty Center for inspection and possible servicing, we will provide the location of a warranty center near you or shipping instructions for the unit’s return to Parasound.

Before You Return Any Unit to Parasound for Service

Before you send your unit to Parasound, you will need to obtain a specific Return Authorization (RA) number and shipping instructions from Parasound’s Technical Department. The RA number must be clearly marked on the outer carton. Use the original factory packing materials and arrange adequate insurance to cover its value. You must include a copy of your purchase receipt, since this document establishes the validity of this unit’s warranty. Warranty repairs are only performed by Parasound or Parasound Authorized warranty centers when your purchase receipt is from a Parasound Authorized Dealer or Parasound Authorized Reseller.

Shipments Will Be Refused by Parasound Under the Following Conditions:

1.Unit was sent without the Parasound-assigned RA number marked on the carton.

2.Unit was sent in an unsuitable shipping carton and packing inserts and is likely to have been damaged in transit.

3.Unit has inadequate packing materials and is likely to have been damaged in transit. Wrapping the A 31 with bubble wrap will not protect it during shipment.

4.Unit was shipped collect for shipping charges. We do not accept collect shipments.

5.Unit was shipped via the US Postal Service.

6.Unit was sent to an address other than the address instructed by our Technical Department.

Warranty Repair

Please read your accompanying Parasound Limited Warranty carefully to understand the applicable rights and limitations. This section provides instructions for obtaining repairs, both for units covered under the Parasound Limited Warranty and for units or situations which are outside the Warranty. The complete warranty can be found at www.parasound.com.

Unit is not eligible for repair under the terms of the Parasound warranty if:

1.Unit was not purchased from a Parasound Authorized Dealer.

2.You do not have the original bill of sale or sales receipt from a Parasound Authorized Dealer.

3.You are not the original owner. The Parasound warranty is not transferable.

4.Unit’s serial number was removed, modified, or defaced.

5.Unit shows evidence of abuse and/or misuse.

6.Unit was modified in any way.

7.A prior repair was attempted by an unauthorized repair station.

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Contents OWNER’S Guide Important Safety Instructions Table of Contents Important Warranty information Thank You for Choosing ParasoundParasound Staff Keeping Records for Future Reference Unpacking Your a 31 & Placement Guidelines AC Mains VoltageUnpacking Your a Rack Mounting Your Parasound a Audio Connections Audio Input ConnectionsSpeaker Terminals Speaker Wire Length and Gauge thicknessSpeaker Connections Correct Speaker Polarity is ImportantGain Control Settings When to Set the Gain Control Knobs Above or Below NormalAudio Position Automatic on/off Turn On OptionsManual Position 12V Position Automatic on/off12V In Jack AC Power CordVolt Jacks 12V Loop Out JackFront Panel Operation On-Off ButtonTechnically Speaking Balanced and Unbalanced LinesGround Loops Eliminating Hum and Buzz Parasound a 31 Design Overview Bare Speaker Wire EndsPower Supply Circuit Designed by John CurlAudio Circuit Path Topology Complementary ConfigurationRelay-Bypassed Soft Start Circuit Input StageTotal Protection DC Servos Output StageClass A-A/B Operation Total Protection RelaysNo sound from speakers Problems and RemediesUnit will not turn on Background Hum or HissRepair or Service Are You Having Difficulty?Specifications Parasound Products, Inc McKinnon Ave, San Francisco, CA