Question about Panasonic SC-AK78 CD Shelf System

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Surround sound speakers

After moving the unit and speakers (having been unplugged first), when replugged, the sub woofers work but the surround sound speakers do not.. Is there some thing that needs to be set or reset?

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  • Anonymous Jan 20, 2009

    tengo un modelo sa ak78 y despues de cambiar el ic RSN 311w64 no se escuchan dos de los surround ,por favor por donde podria revisar, saludos.

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  • 58 Answers

First you need to make sure that all the speaker wires are connected to the unit securly. next make sure that they are wired into the correct spots. then check and make sure that it is on the correct mode. please write back

Posted on Jun 30, 2008

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Hello- I have my denon receiver connected to my tv with 2 front speaker,2 surround and center channel along with the sub. The problem is that when i play a blue ray, all my speakers produce sound including...


I need to know the quality of the speakers on the TV. Try unplugging it from the speakers on the TV and plug it into the souround sound speakers only and see if it plays differently. Double check your sourround sound and makes sure you did not reverse a wire.

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I ended up with one piece of a Teac model CD-X8 MIcro Hi Fi System. you can see what the whole system looks like at http://www.amazon.com/Remanufactured-CD-X8-Wall-Mountable-System-Subwoofer/dp/B000B65GV6...


Yes - you have the sub-woofer. It is a powered sub-woofer with a built in amplifier for both itself and a pair of small satellite speakers. Frankly, given the low cost of the whole system it may not be worth selling on ebay due to the high shipping costs of such an item, but I imagine you could get $30 for it or so on local craigslist or something, assuming you have no use for a sub-woofer...

May 05, 2011 | Audio Shelf Systems

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I have a RCA brand home stereo system. Model number RS2664. Recently, the big speakers (the bass reflex subs) quit working. And I plugged them into the smaller speaker Jack, and they work fine. The...


The sub-woofer amplifier is probably blown. This is a separate circuit from the other channels. It will need to be repaired. It is likely a bad transistor or open resistor that over heated.

Nov 09, 2010 | RCA RS2664 Shelf System

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Hi, I have a rumbling noise coming from the sub woofer on my surround sound system. Any ideas?


Is it only at high volume or all the time? It could be that your input from your DVD may be bad.

Dec 12, 2009 | Theater Research TR-502 5.1 Surround Sound...

1 Answer

Bose Lifestyle 5 speakers(woofer + 5 double cubes)


I repaired the contol unit per instructions from a post at FixYa.

Sep 11, 2009 | Bose LifeStyle 5 Series-III CD Shelf...

1 Answer

Surround sound not working


sorry but start with the obvious..the surround speakers usually are a looped curcuit using one single live split .so check each speaker works the cable is ok .if all checks out ok go for the selector switch if its a push switch press it repeatedly .if all this fails tap around the unit there might be a dry joint.good luck .farr64

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1 Answer

Blown Amp AC?


Unfortunately, these older systems lose value rapidly and the cost of repairing problems like this can end up being as much as buying another system! Actually, you might be surprised to learn that JVC Service still sells many accessories and components from older systems. You can buy this sub woofer for less than $100, which should easily beat any repair cost you'll face. It may even come with the satellite speakers. The part number is VSDT2000R-SPBOX .

NOTE: JVC Service has a free shipping coupon going on right now, so you'd want to use that: DZYZXFX49GYZZ81

Also remember that there's a standard connection between the head unit and OEM sub woofer, so you're free to use a non-JVC unit. I would try to find one with a comparable power rating. Of course, the only drawback is that it won't blend in with the unit... but then, the sub woofer is usually tucked away out of sight.

Oct 12, 2008 | JVC FS-SD1000 CD Shelf System

1 Answer

Problem w/shelf system stereo system!!!!!!!!1


You say that the fault lies in the sub-woofer speaker....

You will need to remove the back panel of the speaker box and make a visual examinatiojh of the contents there just may be an overload fuse there that you can replace your self...there may be a broken wire if the Sub-Woofer has been dropped...

There may be a capacitor or choke that has come loose from its mounting and in falling broken a wire,,,but please have a good look to see whats gone wrong inside the sub-woofer cabinet.

If you like you could take the backs of both the right and left
sub-woofer speaker boxes then visually compare the good one with the faulty one so you can see if there is any physical difference on the faulty one...if they both look the same then you willl need to do some testing with a multimeter set to Ohms to see where the break in continuity lies...just compare readings between the good one and the faulty one to find the fault..

Cheers From YUBEUT..

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1 Answer

No sound from stereo


If you can hear a hiss then the spkrs and amp are OK. It sounds like you're not on whichever source you're wanting to hear or it is on mute. Make sure ther is no function enabled that turns the sound off or over-rides it (like a tape monitor or AUX in...).

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