A month ago, my Sony STR-DB940 began acting up. The center channel would cut out, and there were constant clicking from the protection relays. Alas, it's given me eight years of faithful service, but I wasn't prepared to do the quite extensive homework in preparation for a new AV receiver purchase just yet. Blu-Ray is still a little bit too expensive, and a new AVR isn't necessary until then.
Last Saturday, I thought, what the f**k, having it repaired isn't cost effective, and its screwed like this anyway, so I decided to have a go at fixing it myself.
I had researched the problem on the Net beforehand. This relay thing is a somewhat common problem with these receivers it seems. The speaker protection relays solder joints becomes bad with age. I opened it, pulled every board out to get to the bottom one. There was four blue components that upon googling the designation indeed showed themselves to be the speaker protection relays.
Not having the service manual thus knowing which relay went to which speakers, I redid all 24 solder joints, and managed to get it put together again,and it didn't say KABOOM when powered on
I have played six movies on it, and I still have sound in all five channels.
Last Saturday, I thought, what the f**k, having it repaired isn't cost effective, and its screwed like this anyway, so I decided to have a go at fixing it myself.
I had researched the problem on the Net beforehand. This relay thing is a somewhat common problem with these receivers it seems. The speaker protection relays solder joints becomes bad with age. I opened it, pulled every board out to get to the bottom one. There was four blue components that upon googling the designation indeed showed themselves to be the speaker protection relays.
Not having the service manual thus knowing which relay went to which speakers, I redid all 24 solder joints, and managed to get it put together again,and it didn't say KABOOM when powered on
I have played six movies on it, and I still have sound in all five channels.
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