Question about Sony STR-DE595 5-Channel Amplifier

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Protect Mode With Sony str-de595

I have had this amp for several years now. I have been experiencing 2 separate, but possibly related problems with this amp:

1) It has always gone into "protect" mode when playing DVD 5-channel music albums at even low volume. It doesn't happen immediately, but usually after about the 2nd or 3rd song on the album. With films it was always fine however at any volume.

2) In the past few weeks, it has started going into protect mode with any 5-channel DVD movies as well at even mid-volume.

Any help would be appreciated.

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  • hyw898 Nov 08, 2008

    Dear Robert,
    I have a Sony Amplifier STR-DE545. It goes into "Protect" mode just seconds when I turn it on no matter which channel (DVD, Tuner, Video, CD...) I use. Do you think I am having the same problem as you mentioned to STR-DE595?
    How much does it cost for fixing it by a repair store? I am debating if it is worth to fix it.
    Thank you for your help in advance
    Henry


  • noballs Mar 25, 2009

    I HAVE THE SAME PROBLEM. WHEN I TURN ON THE AMP IT WILL WORK FOR A FEW MINUTES AND THEN WITH A BANG IS GOES INTO PROTECT AND NO SOUND. CAN YOU HELP?

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Hi snark63

Ypou have an intermittent problem that sounds to be heat related... the more work the amp does, the more heat generated by the output stages. This will be aggravating some poor solder joints that are cracked or dry. The unit needs some repair work done in these areas. If you have good experience with a soldering iron, the cure for this is to resolder the power stages of the unit, or any other solder joints that look to be failing.

I am more than happy to answer any other questions you may have about it, please get back to me here, or use the ASK function to go straight to me :) If you are still unsure, have problems, or we need to look at the situation more deeply, then before you give a rating for this advice, hit the ASK button Thanks for using FixYa, If you consider the advice I have given you as sound, a FixYa rating is a great reward for my efforts to help you. Cheers.

regards robotek

Posted on Jul 06, 2008

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2 Answers

I can't get sound out of my amplifier and I haven't changed anything. What could be the problem?


Start by choosing FM on a known frequency with a station broadcasting and volume is turned down to a NORMAL listening level. Next, make sure speaker selector isn't the wrong position (make sure "SPEAKERS OFF/A/B/A+B is set to A [or B to match the speaker terminal connections]), check to be sure "Mute" function is not activated by pressing the MUTE button on the remote to toggle it between on & off, Make sure headphones are disconnected. Make sure "PROTECT" is not displayed on the front as this indicates a shorted speaker wire - shut off and repair the shorted wire(s).

If you get sound on FM, but have an issue with another external component (CD, DVD, Phono, etc.) check the cables between the component and the input panel on the rear of the STR-DE595.

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Check for shorts in the speaker lines.The easiest way to do this is to disconnect all the speaker lines from the amp. Now, turn it on and see if it goes into protect. If it does,that tells you that the problem is in the amp.
If it doesn't go into protect, reconnect the speaker lines one at a time until you find one(or more) that shuts the amp down. That would be your short.

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1 Answer

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1 Answer

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According to its service manual, Component Video (STR-DE595 only, except for
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HI...
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Check the Sony consumer site for who can do it.

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