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

With phono, I only get sound from one speaker, but no problem with tuner. Any ideas?


You can start to troubleshoot the issue.

Change the phono plugs reversing right/left. Does the working speaker change? If yes, problem is in turntable or cartridge. If no, problem is in your receiver.

If the problem is in the turntable or cartridge, pull the cartridge off. Is it directly plugged into the arm, or does it have 4 wires on it? If wires, swap right/left. Change in speaker? No? Problem in turntable wires. Yes? Replace cartridge.

If it's plugged directly into the arm, clean the connections with a pencil eraser (gently). Fixed? No? Try connecting turntable to a different receiver, comment.

What we're trying to do is to isolate where the problem is, so you know what to replace or fix.

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SINCE I DON'T HAVE THE TURNTABLE IN FRONT OF ME AND NOT BEING FAMILIAR WITH THIS PARTICULAR TURNTABLE, I CAN GIVE AN EDUCATED GUESS. WITHOUT GETTING INTO THE CONFUSING ELECTRONIC SPECIFICS, ABOUT PREAMPS, ETC. REMOVE THE TURNTABLE PLATTER. UNDERNEATH IT, IF I'M CORRECT, THERE SHOULD BE A SLIDE SWITCH. IF THERE IS, SLIDE TO THE OTHER POSITION FROM WHERE IT IS CURRENTLY. PUT THE PLATTER BACK ON, TURN ON YOUR SYSTEM AND SEE IF THAT SOLVES YOUR PROBLEM. IF NOT, YOU MAY NEED TO BUY A PREAMP FOR YOUR TURNTABLE. HOPE THIS SUGGESTION HELPS

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This sounds like a wiring problem. Perhaps a faulty earth connection inside the lead or the plugs to and from the turntable. Also check the connections to the cartridge, they can become loose or be connected wrong. Say a channel to the earth connection.

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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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