Question about Sony PS-LX250H Turntable

2 Answers

Loud hum from turntable when phono switch is depressed.

I recently purchased a turntable from Circuit City which is no longer in business. There is a loud hum when the phono button on the receiver is turned on. The turntable does not have a ground connection and did not come with a ground wire. Could this be the problem or could it be something else. Thanks.

Posted by on

2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Sony Master
  • 586 Answers

Hi,
    According to the symptom the wiring hooked is not rite please check the connection Huming sound always produce due to short, break or improper wires setting. Therefor, check the polarity of the wires this will solve the problem.
 Thanks for using fixya.

Posted on May 03, 2009

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 10,594 Answers

Hi,
Please check / replace RCA audio cable that you hooked between Turntable and Amplifier. Usually when ground connection breaks then this hummmm sound comes. There is another possibility when stylus connection is break.
Let me know model and brand of turntable to assist you more in this noisy sound issue.

Hit "add a comment" button for further query / info.
Thanks.

Posted on Apr 24, 2009

  • Shahid Electronics
    Shahid Electronics May 03, 2009

    Alright, without reply of asked question, difficult to assist.



×

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

I get an intermittent loud hum using NAD AV316 amplifier, with stereo speakers(B connection) with phono input from Dual 606 turntable. Hum increases/changes when tone arm on turntable is touched.


The hum of course is the 60 cycle line AC voltage. Make sure that the routing of the AC power plug is as distant as possible from the stereo RCA cables.

The most likely problem is the connection of the phono cartridge to the wires in the arm. These connections usually are silver plated and become oxidized creating a bad connection. Remove the cartridge and using a fine eraser polish the connections. There is a ground connection that makes the five wire connection. Be super carfull these terminals are very easy to break

The phono connections to the stereo is very low voltage subject to interference. The connection to the magnetic pickup at the tone arm is low impedance and is inductive. Any poor connection between the cartridge up to the AV316 will produce this hum. Continue to check connections and swap cables with a known good to resolve.

I have switched the left and right cables to ensure that the cable is not the problem.

Hope this helps?

26292079-cwuk2nnqz2kg21zgzsgwntxz-4-1.jpg

Sep 26, 2016 | NAD Audio Players & Recorders

1 Answer

Good Morning, I have a Technique Technics SA DX940 receiver which hums loudly whenever it is switched to "Phono" for playing the turntable. The turntable has been tested and works well. In fact, the r


What type of turntable do you have? Some turntables must be grounded to the ground screw on the receiver. It may be the selector that needs to be cleaned. Use tuner spay cleaner (if you can still find some around) , also clean the RCA inputs. . If that does not work.. you may have to replace the receiver. The cost to repair is not worth it .

Nov 27, 2014 | Technics Audio Players & Recorders

1 Answer

Loud buzz on both channels with new turntable and phono


The ground wire needs to be attached. The hum is a result of a bad ground.

Jul 12, 2014 | Audio Players & Recorders

1 Answer

Turntable troubleshooting


A loud hum is usually from an earth problem (in fact 'not earthed')
So your best bet seems to try the 2nd pre-amp again, and see if there is a pin or connector for an earth link. Mine earths to the chassis of my main amp.

Jan 31, 2014 | Audio Players & Recorders

1 Answer

Turntable troubleshooting


Go back to the second one and ground the turntable to the pre amp and receiver.

Jul 20, 2017 | Audio Players & Recorders

1 Answer

I recently purchased an onkyo tx-nr626 receiver with phono input. When playing albums , I don't get full sound. Sound is clear but not full and loud.


Different cartridges put out various levels based upon their technology - make sure you are using the proper input for their output. A line level input 1V P-P won't work on most phono cartridges and will require a preamp to boost it to the higher level.

Dec 23, 2013 | Technics SL-BD20D Turntable

1 Answer

The ground for the turntable connection is not working. I've got a bad hum with the ground wire attached to the screw on the receiver and a worse hum when I disconnect it. I had the turntable checked...


The ground connection on your receiver is simply connected to the metal chassis, so there's nothing that can go wrong with it. You won't have hum problems with any sources other than the turntable because their output levels are higher.

With nothing connected to the turntable input, do you still hear any hum? You shouldn't. If you do, the problem is not because of the ground connection, but because something in the receiver's phono preamplifier circuit is faulty. But if there's no hum, the turntable is responsible. The fault may be in the turntable's output cable. The shield connection may have broken loose from the terminal where it's connected in the turntable. Or your cartridge may be defective.

If your receiver is the culprit, you can see about having it serviced. Or you can purchase an external turntable preamp. Radio Shack sells one, and here's another source. With an external preamp, you can connect your turntable to one of the higher-level inputs (AUX, CD) and avoid the phono input.

Jan 12, 2011 | Yamaha RX-496 Receiver

1 Answer

Can I connect my Dual turntable to pioneer VSX D712 receiver. I tried connecting it to a preamp (bought from Circuit City) and then to AUX, but all I get is a loud hum


I presume you bought a PHONO preamp from RS. That should be all you need. Is the TT otherwise functional? Loud hum is usually an ungrounded or unshielded signal cable. Phone cartridges create such a small primary signal that any external airborne electrical noise entering the circuit will be very large in comparison. Check cables and make sure the headshell is locked in correctly on the tonearm. Examine the small cables connecting the cartridge. Dual = good turntables. I have a CS1249 from the 70's.

Jan 09, 2010 | Pioneer VSX-D712 Receiver

1 Answer

Major feedback hum from speakers


The reason for the hum is as follows:

1) The phono input on the receiver contains an additional stage of amplification required for typical turntables.
2) Pluggin in a unit that has a signal level too high will generate this hum.
3) Your turntable contains an pre-amp that allows it to work using an aux input (or tape input) as most receivers today no longer have phono inputs.
4) Grounding issues relate to the older types of turntables where there was NO pre-amp stage inside the turntable. In this case ,the signal levels were so low that stray noise would often get in the way of the signal. Proper grounding would elimiate this noise.

Hope this helps.

Dan

Aug 10, 2009 | Sony PS-LX250 Turntable

Not finding what you are looking for?
Sony PS-LX250H Turntable Logo

Related Topics:

93 people viewed this question

Ask a Question

Usually answered in minutes!

Top Sony Audio Players & Recorders Experts

kakima

Level 3 Expert

102366 Answers

 Grubhead
Grubhead

Level 3 Expert

5047 Answers

The Knight
The Knight

Level 3 Expert

74106 Answers

Are you a Sony Audio Player and Recorder Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...