Question about Sony STR-DE435 Receiver

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Sony STR-DE435 Receiver

My reciever was working fine then immediately stopped. Naturally, i opened the top and realized the fuse was blown(6.3amp 125volt). I replaced with 5amp 125 volt and as soon as i plugged in power, the fuse blew. This happend with no other source plugged into the receiver. So i assumed its an capacitor, cap or something of that nature. I having little electrical knowledge, would like to know if there a manual or certain current measurements i can use to help diagnose what particular element is shorting the circuit. Your help would be greatly appreciated.

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  • akrapovic Aug 04, 2008

    I am having the exact same problem, I even tried a 6amp 125volt two times, and popped as soon as I plugged it back in. Please help.

  • jeremyc913 Oct 29, 2008

    I was woundering if anyone found a fix for this. I have done the same thing changed fuses 6.3, 6, 5 all of them blow as soon as i plug it in. I am thinking it might be the relay that is shot and it is showing contious open. Anyone have any fix at all before I start really tearing into it?

  • barley_hops Nov 12, 2008

    Same thing is happening to me, Please help me. Thank You

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5 Suggested Answers

  • 1 Answer

SOURCE: STR DE435 PROTECTOR STR DE435

I have the same problemwith mine. the protector sign is on- I do not know why- and do not know what to do about it. Let meknow if you do or if you get assistance and I will do the same. My e-mail address is 1971CJS@Bellsouth.net

Posted on Feb 28, 2008

  • 1 Answer

SOURCE: I have a Sony STR-D565 Receiver. I bought new

I resently hooked up my sony std d 565 reciever for 5.1 speakers and I keep hearing beeping, what is wrong?

Posted on May 01, 2009

CAYPIANAN
  • 227 Answers

SOURCE: Sony str-DE435 Flash Protector

this is not a reset problem, you have a defective audio output, is either the outputs transistors or the drivers IC's ( integrated circuit) and sometimes if you are lucky is just loose connections on the drivers IC;s.
good luck

Posted on Jun 18, 2009

dunnbiker
  • 8546 Answers

SOURCE: fuse keeps poping, what other type of fuse can i

If it keeps blowing the rated fuse you really need to take it in to a shop for further analysis. Using an incorrect, higher value fuse will only raise the risk of fire or more damage to whatever is blown in the unit.

Posted on Dec 09, 2010

dunnbiker
  • 8546 Answers

SOURCE: I have a Sony STR-DE435 that won't turn on

Generally speaking, an amp attempts to protect itself from heat, shorts, overloads and operator exuberance 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 'nekkid'. 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 at the speaker as another possible root cause for intermittent shutdown.

Posted on Sep 08, 2011

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Sony str-DE435 Flash Protector


this is not a reset problem, you have a defective audio output, is either the outputs transistors or the drivers IC's ( integrated circuit) and sometimes if you are lucky is just loose connections on the drivers IC;s.
good luck

Jun 18, 2009 | Sony STR-DE435 Receiver

1 Answer

Flashing protector


This usually means an output transistor is shorted and the amp is protecting itself. There are usually 2 8 amp fuses GMA type (glass tube) that are located near the large transformer on the main board that also get blown. You can try the fuses and see if it fixes it (10% of the time it will). If they blow again, it will be one or more output transistors are shorted, and the unit will need professional repair.

Jun 13, 2009 | Sony STR-DE435 Receiver

1 Answer

STR DE435 PROTECTOR STR DE435


I have the same problemwith mine. the protector sign is on- I do not know why- and do not know what to do about it. Let meknow if you do or if you get assistance and I will do the same. My e-mail address is 1971CJS@Bellsouth.net

Jan 29, 2008 | Sony STR-DE435 Receiver

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