Question about Nakamichi AV-7 Receiver

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No Sound from Turntable

I have a Hitachi HT-45 turntable that I have tried to hook up to my receiver. When I connected the turntable directly, I had to crank the volume on the receiver just to get sound. I tried connecting the turntable to an Adcom GTP-400 pre-amp, which worked for a while but then the sound quality deteriorated and now I have no sound at all from my turntable! All of my other devices (DVD, VCR, CD, cassette deck)work perfectly, and the turntable itself is in working order. I've also tried re-connecting my turntable directly to the receiver, but now that's not working either! Any suggestions?

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  • Anonymous May 24, 2008

    Hi, I have an old Akai AP-B1 turntable that I have connected to my Yamaha A1 Amplifier's phono input. I need to really crank up the volume (will probably blow my speakers if I were playing my CDs) to hear it. The sound is also very bad and tends to skip although the record is good.. I notice that the platter is also wobbly. I am not sure whether the wires to the cartridge are connected correctly as I was given the player (no stylus) by a friend. I bought a new stylus and connected it with the white and red wires to the top two cartridge pins, the blue and green to the bottom two pins. How do I go about balancing the arm ? I would appreciate any suggestion to resolve this problem. Thanks.

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It definitely has to go through a preamp (a PHONO preamp that is...) something like this: http://www.phonopreamps.com/tc400pp.html

Posted on Sep 14, 2007

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You are right Mitch. New amps/receivers seldom have phono inputs for the old non amplified turntables.

Posted on Dec 18, 2012

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1 Answer

My hometheater onkyo ht-s 3500 problem increCVasing volume level 45 cut off amplifier


Hello KAMAL, This means that the unit is going into protect mode. This is typically caused by something internal or a speaker connection could be causing it. To isolate if it is a speaker or the receiver you would first have to turn it off and disconnect all of the speakers. Turn the unit back on and turn the volume up to 45 with no speakers connected. If the unit stays on then you will know that one of the speakers was causing this short to happen. If that is the case I would check all of your connections. If the unit turns off when the receiver has no speakers connected then it is an internal issue and it would have to go for service. Thanks, FJD

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The only output from the turntable is the low-level signal from the cartridge. Most likely, the receiver you've hooked it to doesn't have a phono input. Many receivers today don't come with one, and if you connect the turntable to a line-level input you get either very low volume or none at all, depending on the cartridge. What you'll need is a turntable preamp to boost the output to line level so the receiver will work properly. Radio Shack still carries a preamp, available online and in some stores. You can also find preamps online (here's one at Amazon). With the preamp connected you can use any free input on the receiver.

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Let's figure out which hardware is failing. Connect the phono preamp to the CD or tuner input to see if it works there. It should. If it does, your receiver is at fault. Did the front panel controls get damaged?

How did the turntable fare in this accident? As a basic test of its ability to produce sound, hook it directly to the CD input and raise the volume slowly while playing an LP. If it's alive you'll hear a very weak, tinny sound, but I assume you know that or you wouldn't have a phono preamp in the first place and would probably be asking why the TT sounds so poor. :-)

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It will need a pre-amp to connect it to your newer amp. The old style turntables normally used a magnetic cartridge that older receivers / amplifiers had a special phono input (which incorporated an internal pre-amp) to connect and hear at normal volume settings. Newer receivers / amplifiers normally do not have this type of phono input, thus the need for an external pre amp device.

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http://www.turntableneedles.com/Pre-Amps_c_4.html

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1 Answer

My system shot down during a movie


The reason why your receiver is going in protect is because there is a short circuit happening. This would either be on your speaker wires, speakers or receiver itself. What you want to do to check would be:
1. Unhook all sources and speakers from your receiver.
2. Turn on your receiver and crank up the volume to maximum, if your receiver does not shutdown or go on protect then the receiver is OK. If it does shutdown and go on protect then its an internal problem on the receiver and you would need to send that over to an authorized service center.
3. Hook up a source and 1 speaker. Play something from the source or the fm tuner, Crank Up the volume to about 46 or 47 volume. If the receiver does not shutdown, its good.
4. Hook up a second speaker and repeat the process until you encounter the pop and shut down
if for example you encounter the pop on the 4th speaker, try changing the speaker wires.
5. If the receiver still shuts down then it would be a short on the speaker itself and it would need to go to an authorized service center.

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the 7.1 sound not all the movies has that feature and u need to emulate it, doit in the dolby digital ex and the speakers must sound.

try the volume for the SBL or SBL maybe are to low.

decrease the volume for all the speaker less the SBL, SBR and check it out.

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Does your receiver have a dedicated phono input? If not you'll need to use a preamp between the turntable and receiver. Your other turntable may have a preamp built in and the Technics not.

If this does not help, please post the brand and model of both your receiver and your other turntable.

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