20 Most Recent Sony STR-DE935 Questions & Answers

One of the power amplifiers usually fail. If you are not an electronics engineer, get someone else who is competent to repair it.

Sony STR-DE935 | Answered on Mar 30, 2017

it may have an internal shout somewhere causing the speaker protection relays to kick out..

Sony STR-DE935 | Answered on Jan 18, 2014

You've blown it. It recognizes a potentally harmful situation and goes into protect mode.

Sony STR-DE935 | Answered on Jul 21, 2013

Protector appears when there is an excessive current draw from the final amplifiers or the unit overheated. Since it appear immediately after start it's clearly the first cause.
You will have to open the unit and check the connections between the board and the speaker jacks - if no external short is observed then the short is in the amplifier circuit itself and it will have top be replaced.

Sony STR-DE935 | Answered on Sep 07, 2011

Power transistors probably degreased or the greas had hardened and doesnt conduct the heat anymore. Quite touchie work, would suggest it only if u have some knowledge about soldering electronics.

Sony STR-DE935 | Answered on Jun 17, 2011

Generally speaking, an amp protects itself from heat, shorts and overloads by refusing to turn on or stay on.

Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.

You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.

If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.

If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'naked'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced and competent hands-on tech.

Check for loose speaker connections as a root cause for intermittent shutdown.

Sony STR-DE935 | Answered on Feb 21, 2011

I'm a little confused by your use of 'composite' with audio, as in "Does anyone know what would happen if I ran both composite audio and optical audio both to their respective TV/SAT IN input jacks on the STRDE935 ?". What is composite audio?

The manual claims on page 48 that you can't record digital audio out to the analog REC OUT jacks.


I say 'claims' because the engineers or manual writers clearly are not as creative as you are in trying to wring as much utility out if this unit as possible.

I can't find an answer but I would offer this - if you are recording anything though any AVR, as soon as you choose to monitor the audio the digital input is usually disabled.

And I would be curous to hear more about what you're doing and how you finally achieve it.

Sony STR-DE935 | Answered on Dec 26, 2010

Required remote control RM-LJ302 (part number, 141829311) is available in Part Store but price is bit high.

Sony STR-DE935 | Answered on Oct 15, 2010

Check on the output of the set, It can be short. remove the power supply from the section to confirm.
The receiver must be discconnected also from the speakers to confirm if there is any short on them

Sony STR-DE935 | Answered on Sep 15, 2010

fuses have different sizes even though they have the same rating's, the best remedy to do is, do you any stranded wire, cut one piece out of the whole strand and solder it on the fuse housing that will do the trick.

Sony STR-DE935 | Answered on Jun 17, 2010

Power output divide it by 110

example 600 / 100 + 5.45

you need to replace it with 6 Amperes or the closest as long as it is not lower than 6

Sony STR-DE935 | Answered on Jun 06, 2010

If its the sound board both fuses are the same. but if they blew you may have a bigger problem like output transistors shorted. But try replacing fuses first if they blow again thats your problem. Good luck

Sony STR-DE935 | Answered on Jun 02, 2010

A service maual is what ya need unless you already found already. Let me know as I may have one!

Sony STR-DE935 | Answered on Apr 19, 2010

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str de 935 always going protector mode

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