Question about Sony STR-D965 Receiver
I have a Sony STR-D965 and output from the left channel is faint even at high volumes. Minimal sound is heard from the channel. Same problem using either speakers A or B input. I attempted changing the speakers, adjusting the balance, various surround modes. I have not opened the unit. Any ideas? Where should I start?
Hi, Happened across this forum looking for some remote info. Had a similar problem with my 945...main speaker outputs started to click off & on, no rhyme or reason. Found that the solder joints on the speaker output relays were cold (poor soldering). Actually happend twice, two different relays. Took me a while to find it, reflowed the solder, that solved the problem, over two years ago now. Are you able to dig into the receiver? Do you have a (good) soldering iron and some solder? If not take it to elec. shop and tell them to look for cold joints on the relays.
Posted on May 11, 2007
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
Posted on May 20, 2009
This is a common problem that a lot of people have with this system. The problem is in the connection of the Left and Right Speakers to the receiver. I had this problem too.
What you need to do is actually open up the receiver using a screwdriver. Once it is opened up you will see a circuit board and lots of wires. Look for the red and blue wire that should be pretty easily visible. Cut each one, then strip the ends some, and reattach the ends but to the opposite color- make sure to solder it as well. On some models they messed up the connections and it got switched. Once you do this, the left and right speakers should work great. Hope this helped!!
Posted on Sep 22, 2010
First off, you want to correctly isolate what or which channels are/is bad. Use one good known speaker. Connect that speaker, one channel at a time, and test that channel with a fixed volume level (don't adjust the volume when you check each channel). Isolate the low level channels and make note of it. Note: each channel has their own amplifier. Once you've isolated the bad channels, take it to a repair shop and tell them the bad channels. They will then locate the circuit and narrow down the search to fine the problem - it's usually a bad solder connection. If it blows fuses - more likely a shorted transistor. In your case it's a bad solder connection.
Posted on Dec 22, 2010
If you have checked the speakers and wiring, the right channel has a audio driver or output problem, which explains the low volume, static, and distortion. A service technician will be required to fix the receiver so it will balance the left side.
Posted on Jan 10, 2011
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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.
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