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SERVICING YOUR JC 1

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If All Else Fails-Call Us fo Help

Call your Parasound dealer or Parasound’s Technical Service Department toll free at 1-866-770-TECH 

(8324) between 8am and 4pm Pacific Time. We can often solve the problem with simple diagnostic 

tests  you  can  perform  yourself.  If  we  determine  that  your  JC  1  will  need  further  inspection  or 

servicing, we will: 

a)  refer you to an authorized Parasound repair center near you, or 

b)  authorize return of the unit to us and advise you of the correct procedure.

Procedure for Returning Your JC 1 to Parasound for Service

If Parasound determines that you should send your JC 1 to Parasound, you will be given a Return 

Authorization  (RA)  number. This  RA  number  must  be  clearly  marked  on  the  outer  carton  only. 

IMPORTANT:  Enclose  a  copy  of  your  original  purchase  receipt.  A  unit  is  eligible  for  warranty 

repair ONLY when the purchase receipt shows that the unit was purchased from an Authorized 

Parasound  Dealer.  A  unit  obtained  through  unauthorized  channels  is  not  eligible  for  warranty 

repair. Parasound is not responsible for any sellers’ misrepresentations about our warranties or 

other service policies. 

We do not accept any of the following:

Units with collect shipping charges

Units without a valid RA number

Units without a suitable shipping carton

Units for which we see or hear evidence of improper packing

For a non-warranty repair, contact us for an estimate of the repair charges before you ship the unit 

to us. The same packing and Return Authorization number procedures apply.

Important Notice - Shipping the JC 1

Before  shipping  the  unit  to  Parasound,  you  MUST  re-pack  the  unit  into  its  fitted  molded  foam 

insert sandwich and its original carton. If you do not have the original packing cartons and foam 

inserts, call us for new packing materials that we can provide to you for a nominal charge. Use 

of any other carton and packing materials will probably result in shipping damage, and refusal of 

the unit. Common carriers such as UPS seldom pay claims for damage incurred during shipment 

when a product is surrounded only with Styrofoam “peanuts” or otherwise improperly packed. We 

cannot stress enough the importance of properly packing your JC 1. Shipping damage resulting 

from inadequate packing can cost you a lot of money and significantly increase the time required 

for  repair.  Ship  the  unit  with  adequate  insurance. After  repair  under  warranty,  the  unit  will  be 

returned to you via prepaid UPS within the continental United States.

JC 1 will not turn off when 

audio signal is removed

PROBABLE CAUSE

Power cord is disconnected

REMEDY

Hum and / or buzz  

through speakers

Ground loop between preamplifier 

and JC 1 or at the equipment rack

 

Move the 

Ground Lift

 

switch to its 

Lift

 

position

Install nylon shoulder washers on both sides of  

the panels of all equipment to insulate metal  

from touching the rack 

Check polarity of DC source with a voltmeter

T

Содержание HALO JC 1

Страница 1: ...JC 1 Amplifier Owner s Guide...

Страница 2: ...trigger connection wire While you are unpacking your new amplifier inspect it thoroughly for possible shipping damage If you see any contact your Parasound dealer right away Be sure to save and store...

Страница 3: ...HE JC 1 TO TRIGGER ANOTHER COMPONENT _________________________________________________________________________________ UNDERSTANDING THE INDICATORS ON THE JC 1 ________________________________________...

Страница 4: ...nel height occupies four rack spaces 7 or 176 mm When mounting equipment below the JC 1 you will also need to allow about 1 8 below the unit for the bottom chassis screws To attach the rack mount adap...

Страница 5: ...alanced interconnect cable into the Balanced Input jack on the JC 1 Plug the female end of this cable into the desired channel balanced output jack on your preamplifier or surround controller Repeat s...

Страница 6: ......

Страница 7: ...wo five way binding post speaker terminals on the JC 1 are connected in parallel and accept most speaker wire terminations including single or dual banana plugs or 1 4 spade lugs The openings in the t...

Страница 8: ...e JC 1 What You ll need An active audio source connected to the Balanced or Unbalanced Input jack on the JC 1 Before Connecting Remove power to all the components in your audio system Make sure the Au...

Страница 9: ...the rear panel left to its 12 VoltTrigger position What you ll need A wire with a 2 5 mm sub mini plug on each end provided A control component with 9Vdc to 12 Vdc trigger voltage Before Connecting R...

Страница 10: ...oesn t turn on at the same instant as your other components or other JC 1s This avoids turn on surges and brownouts that might cause units with microprocessors to lock up or even trip house wiring cir...

Страница 11: ...t position to eliminate it Refer to theTechnically Speaking section for detailed technical information about the causes of ground loops and what you can do about them Bias Level Switch The Bias Level...

Страница 12: ...e preamplifier or system controller Having all the audio components on the same power circuit helps prevent hum caused by possible ground loops The JC 1 requires AC power that is continuous rather tha...

Страница 13: ...o user serviceable parts inside To 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...

Страница 14: ...eakers Ground loop between preamplifier and JC 1 or at the equipment rack Move the Ground Lift switch to its Lift position Install nylon shoulder washers on both sides of the panels of all equipment t...

Страница 15: ...es We do not accept any of the following Units with collect shipping charges Units without a valid RA number Units without a suitable shipping carton Units for which we see or hear evidence of imprope...

Страница 16: ...the two signal conductors When the positive and negative signals appear at the component receiving the signal they are equal but 180 degrees out of phase with each other with respect to ground To send...

Страница 17: ...hree tips to avoid ground loops 1 Use a balanced input line with your Parasound JC 1 See Balanced and Unbalanced Lines in this section 2 When rack mounting always use the included insulated shoulder w...

Страница 18: ...do not restrict any current whatsoever to the power supply once the JC 1 is in full operation Complementary Configuration Each stage of amplification has transistors fed by the positive DC power suppl...

Страница 19: ...ocking capacitors The JC 1 is direct coupled from its input jack to its speaker terminals This advanced circuitry never needs adjustment or maintenance It operates outside the audio signal path to kee...

Страница 20: ...ubject to change without notice Input Sensitivity for 28 28 V Output into 8 Balanced 1 V per leg Unbalanced 1 V Signal to Noise Ratio input shorted 122 dB IHF A weighted bias set to Low 120 dB IHF A w...

Страница 21: ......

Страница 22: ...Parasound Products Inc 950 Battery Street San Francisco CA 94111 415 397 7100 Fax 415 397 0144 www parasound com...

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