Question about Sony STR-DE945 Receiver
I have had an ongoing problem with my Sony STR-DE945 receiver for the past couple of months. It started making a clicking noise but thats all that would happen, i assumed it was just changing from a digital signal to analog or something. Then over the past month it started clicking but then the audio would cut out. Eventually it would click again and the audio would come back on but shortly after it would click and go back out. Sometimes playing with the A / B / OFF switch would get it to come back on. Sometimes I'll turn it on and it will be fine for the whole day, other times its a huge problem and has to be turned off and dealt with later.
2 days ago I cracked it open to see if anything looked burnt or damaged and from what I could see everything was OK. I removed and replaced all the ribbon cables to make sure they were tight, tightened any visible screws to make sure they were tight. There was even a ground clip that I tightened onto the front frame, it comes off the front panel board where the volume knob is attached to. For the next 2 days everything was fine and hoped it was possibly that ground wire causing the issue. But the clicking has now come back. It hasn't cut the audio out yet but I'm sure it will eventually.
I am looking at just getting a replacement receiver but either way I would like to get this one fixed. So if i can save $50+ taking it to a shop I will. I am capable of soldering. Does anyone have any idea as to what causing this clicking and how it can be fixed? I have seen a few people asking about this online but none of them were given a solution. If I don't get any response and end up taking it to a shop I will be sure to post what had to be replaced.
I had the same problem, I realized it was due to bad solder joints in the relays that physically turn the signal on and off to the speakers. There are relays for each speaker and a main relay for the mute/headphone. The click you hear is the relay disengaging. the relays look like narrow boxes about an inch high. If you open up the amplifier, try gently pushing on the top of the relays, if they click you know you have a bad solder joint. Remove the board, turn it upside down and re-solder the relays.
the following video shows what a relay is, and another problem can be that it is dirty, if so follow the instructions in the video to clean it.
Posted on Apr 14, 2015
For me it was an issue with the Power Button and Speaker Selector Board that attached to the Front/Center Interface Board. The prongs on that connection are something left to be desired. Really poor design and hardware (the connector). With some good cleaning and tension re-adjustment, along with zip-tying the corners of the two boards together, it seems to finally be fixed for good. Now a simple touch of the front panel doesn't kill my audio. Good Luck All!
Posted on Sep 23, 2012
I too have the speakers going on and off at random and have noticed sometimes they are softer than the others. I found a lot of cracked solder on almost all the boards and I found the speaker relays to be oxidized. Replaced the relays and resoldered everything and all is well again. Relays cost under $10 each, pretty inexpensive fix. Now if I can only find a way to add extra channels for 7.1 and HDMI (no this is not possible) just wishing because the newer receivers are not as nice as this one. Hope this helps others.
Posted on Sep 10, 2012
Had similar problem of clicking noise with sound cutting out on my STR-DE945. Had a tech look @ my receiver & he soldered all the joints on the main board back as he had found some were broken. Now, it had been 5 days since I have gotten my receiver back and the clicking noise is gone. My only concer now is, I have observed that my front speaker plays very soft when I select A&B speakers. If I select B the right is loud but left soft. If I select A only the left is loud & right soft. Could it be a joint that is not soldered properly for the A&B switch that is causing this? As I have also observed, that when I do a speaker test, that my front left speaker says it is the rear right speaker playing. I have checked all the speaker wires and they are all connected properly.
Posted on Nov 22, 2010
I had the same problem with STR-DE545; I worked out over time the main board starts to sag, which in turn causes the exposed solder points to earth out on the bottom of the case. Reseating the mainboard along with using non-conductive foam to hold it up, fixed the grounding issue. Hope this helps anyone else with the same issue. :)
Posted on Jul 25, 2008
I also had the loss of the power button and a/b switch and no audio. I found the five pins that join the power/audio a/b circuit board to the main front circuit board actually broken on the front board side and very loose. I sodered them back into place and now have my working 945 again. I still want to buy a str-dg820 but at least now I have a little more time to save up for one. Hope this helps anyone with the same problem.
Posted on Jul 05, 2008
This should be fixable for not too much as well. First check the main board for poor solder connections. Second, is the clicking effected by the volume control?
Keep us posted.
Posted on May 06, 2008
I was able to fix this issue by opening up the receiver, removing the circuit board that the power button and speaker selector knob contact, and then reseating that board back onto the circuit board it was connected to (the one with the majority of the control buttons). This completely resolved the problem. The power button works again and the audio does not drop out anymore.
No soldering was required.
Posted on May 16, 2008
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Posted on Jan 02, 2017
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The far left optical connector on the back is an output.
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