Question about Sony STR-DE1075 Receiver

1 Answer

The receiver has no sound output through all the speakers and headphone

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  • Sony Master
  • 17,970 Answers

Starting with the most common/most likely problems, eliminate the possible causes until the problem has been isolated, then proceed to correct or repair it. Keep in mind that, always turn off the power to the system when connecting or disconnecting cables and wires. Turn on the system to after each step to check for correct operation:

1. Check Speaker Wires: Inspect the speaker wires from the receiver to the speakers and look for damage or loose connections. Pets can chew through speaker wires. Ensure that the speaker wires are firmly connected on both ends. Make sure that the insulation is adequately stripped on both ends of the wires and they are inserted far enough to make good contact with the speaker connectors. If the problem persists, move to the next step.
2. Check Speakers: If possible, connect another speaker to the receiver and test the system. If it does, the speakers may be damaged or defective. If the problem persists, move to the next step.
3. Check the Source Component(s): If you are using a CD or DVD player, try using the AM/FM tuner built into the receiver, or a tape player or any other source connected to the receiver. If the receiver works on some sources but not others, the problem could be the analog or digital cables between the source component(s) and the receiver. Replace the suspect cables and try the source component again.
4. Check the Receiver: Make sure the receiver is plugged into the wall and the wall outlet is working. Make sure that the speakers are turned on via the Speaker A/B switch (found on the front panel of most receivers). If the lights on the front panel illuminate when turned on, the problem could be the amplifiers in the receiver. Try using a pair of headphones connected to the receiver to verify that the receiver is operating. If you hear sound from the headphones it means that part of the receiver is working. Make sure the correct source is selected on the receiver.
5. Try Another Receiver: If all of the steps above do not work, it is likely that the problem is isolated to the receiver. If possible, connect another receiver or amplifier to the system and try again. If the system works, the problem is the receiver. Contact the manufacturer or service center for further advice or repairs.

Test it and tell us news.

Posted on Jul 08, 2010

  • 2 more comments 
  • flemingstrat Jul 08, 2010

    all of that has been done and I still have no sound

  • flemingstrat Jul 08, 2010

    any ideas

  • ZJ Limited
    ZJ Limited Jul 08, 2010


    The headphone jack normally runs off the output amp through some
    dropping resistors. So if the amp doesn't work, the headphones won't
    either. Measure for shorts and get back to us. I think those used a driver IC
    and output transistors along with a bias transistor. Blown outputs are
    common.

    When You turn the unit on, about five seconds later I hear a "switch"
    and the display goes off.
    ???

    If yes, this is likely the internal protection circuits kicking in. These
    'protections circuits' are meant to protect against overload on the
    outputs including shorted speaker wires, and probably thermal
    overheating protection. But, these protection circuits are not meant to
    block voltages applied to the speaker output from some external source,
    because no amp manufacture would expect anyone in their right mind to do
    this.



    Which brings up the question, why on earth DID you do this?



    You could have connected either the audio outs (audio, not speaker) of
    your TV to the audio in (AUX or Tape) of the amp. You could have even
    connected the headphone jack of the TV to the Aux or Tape of the amp.
    But why or why would you tie the output of one amplifier (the TV) to the
    output of another amplifier (the stereo).



    Likely the power outputs of the amp are blown in some way, either burned
    open or shorted. Which would explain why the protection circuit is
    tripping after you turn it on.

    Test it.

  • ZJ Limited
    ZJ Limited Jul 08, 2010

    Also, here can find the sony_str_de1075_6_1_channels_receiver/manual check it.

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