Question about Sony STR-DE635 Receiver

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Sony Receiver - (STR-DE635)

Power supply keeps popping fuse (F801). I need a schematic to determine what is the cause. Can you help me?

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  • JohnnLou Jun 02, 2008

    We blew out our receiver and need a schematic to fix it, where do I get one?

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6 Suggested Answers

gman63b
  • 9 Answers

SOURCE: Sony STR-DE635 Receiver-no sound at all

Turn your volume down,press the tape monitor button.then turn up?

Posted on Mar 21, 2008

aborcass
  • 2651 Answers

SOURCE: Sony STR-DE635 Receiver-no sound at all

sorry my expertise is in appliances, youl need to repost you question to another tech

Posted on Mar 22, 2008

renosean
  • 492 Answers

SOURCE: receiver goes into protector mode

Nope, power supply it would not even power up.  The capacitors are fried

Posted on Jan 04, 2009

welcomejee
  • 10594 Answers

SOURCE: Sony receiver STR-GA8ES

You can download required service manual from Manual Zone for small fee.
You can buy required parts for the same unit from Part Store.

Posted on Jan 18, 2009

  • 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

tech240
  • 169 Answers

SOURCE: Have a Sony STR-DE635 that

Have you checked the rails to ground for shorts. Get hold of a variac as it does make things a lot easier.

Sound like you might have some shorted output devices.

Hope this helps
Thanks for using FixYa

Posted on Aug 18, 2010

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2 Answers

WHEN TO TURN SONY STR-DE635 ON AND NO AUDIO OUPUT


Maybe the Preamp driver IC, looks like a car audio ic on the main board.
Often with age the heat generated by the ic will destroy the solder.Makes it look like lava rock in bar-b-que grill. Which
causes an open circuit in the preamp driver to the audio power
stage.
Simply resolder them, most often restores audio. Should have
a bottom removalble cover.
If not, a fuse normally blows if ic or channel is shorted. Check if
display will say Power off, Protect, etc. That means there is a problem with a channel.
Most Sony receivers use darlington transistors, they short easily !!
I am an old school component level service tech, I think I do have a schematic for this model and many others.

Jan 12, 2012 | Sony STR-DE635 Receiver

1 Answer

Have a Sony STR-DE635 that keeps blowing the 2 8 amp fuses in the power supply. disconnected all speakers and powered up with same result. Checked bridge rectifier and (2) 10000 uf caps all are good


Have you checked the rails to ground for shorts. Get hold of a variac as it does make things a lot easier.

Sound like you might have some shorted output devices.

Hope this helps
Thanks for using FixYa

Aug 18, 2010 | Sony STR-DE835 Receiver

1 Answer

Blows main fuse when power is turned on


Shorted power supply/module is most likely problem.

May 27, 2009 | Sony STR-DE635 Receiver

1 Answer

Sony STR-DE635, Sound from left surround speaker but not right


first turn the actual volume up on that channel on the reciver then make sure your speaker wires in the rear are using the same lenght each

May 18, 2009 | Sony STR-DE635 Receiver

1 Answer

Receiver goes into protector mode


Nope, power supply it would not even power up.  The capacitors are fried

Jan 04, 2009 | Sony STR-DE635 Receiver

1 Answer

Sony str-de635


It may need soldering of the display, could also be a bad resistor or transistor in the power supply.

Dec 08, 2008 | Sony STR-DE845 Receiver

1 Answer

I have a older sony STR-DB830 receiver that keeps blowing two fuses labled f801 and f802. They are 125v 8amp. They pop the instant you turn the power on. Something is shorted, but I can't find it. Is this...


hello, i believe that your problem is in the audio output ckt, check all the transistor you have one bad channel (shorted transistors). with a soldering iron disconnect them and check them with a meter.


good luck

caypianan@yahoo.com

Nov 10, 2008 | Audio & Video Receivers

1 Answer

Sony STR-DE635 Receiver-no sound at all


sorry my expertise is in appliances, youl need to repost you question to another tech

Mar 21, 2008 | Sony STR-DE635 Receiver

1 Answer

Sony STR-DE635 Receiver-no sound at all


Turn your volume down,press the tape monitor button.then turn up?

Mar 20, 2008 | Sony STR-DE635 Receiver

1 Answer

Led display goes dead


I suspect intermittent 31V supply, filament supply or bad connections on fluorescent display.
Check Q801 31V reg , R802, zener on base of Q801 located on DC board. Inspect all boards for bad solder joints, reflow and tighten pcb grounding screws.

Oct 23, 2007 | Sony STR-DE635 Receiver

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