Dr_Evil
0
- Joined
- Feb 25, 2008
- Messages
- 2,128
- Points
- 63
My computer speakers have quit working. There is a powered sub and the speakers are wired to it. Over they past year or so, they would randomly start making static and popping noises. They would stop after a while on their own or if I nudged the sub. Since the noise would stop if I moved the sub, I thought something was loose.
The I/O panel is held on by some screws on the back of the sub so I pulled them out to take a look. Everything looked fine so I put it back together. I powered it up and all it did was make a humming noise and start to get hot. The panel is metal and the amp IC held against it by a couple screws and a small piece of aluminum.
So here's the thing. I know if can be easily repaired. Do you think the amp IC is bad? The op amps, resistors and capacitors are easily found. I plan on replacing the caps since those seem to be a common failure in electronics. The amp IC seems to be difficult to find though.
I assume the green caps are poly film. I also assume those can be replaced with ceramic ones and both types are non-polarized. There are 3 small yellow ones. I'm not sure what type they are or what the ratings are though.
So here's the questions:
Could the audio amp IC be bad?
Can the green caps be replaced with ceramic ones and are they non-polarized?
Just noticed the post number is the same as the year I was born. I also took a look at the back on the CB where the audio amp IC is. Looks like some solder joints are bad. I'm seeing cracks in the solder.
ETA: Well, they have been fixed. Reflowing the solder fixed it. My 15 year old speakers are working again. They have survived 6 moves including to Germany and back. I guess let this be a lesson that the fix can be simple. I'll give it a few days to make sure the static/popping is gone.
This is what I have. (not my picture)
The I/O panel is held on by some screws on the back of the sub so I pulled them out to take a look. Everything looked fine so I put it back together. I powered it up and all it did was make a humming noise and start to get hot. The panel is metal and the amp IC held against it by a couple screws and a small piece of aluminum.
So here's the thing. I know if can be easily repaired. Do you think the amp IC is bad? The op amps, resistors and capacitors are easily found. I plan on replacing the caps since those seem to be a common failure in electronics. The amp IC seems to be difficult to find though.
I assume the green caps are poly film. I also assume those can be replaced with ceramic ones and both types are non-polarized. There are 3 small yellow ones. I'm not sure what type they are or what the ratings are though.
So here's the questions:
Could the audio amp IC be bad?
Can the green caps be replaced with ceramic ones and are they non-polarized?
Just noticed the post number is the same as the year I was born. I also took a look at the back on the CB where the audio amp IC is. Looks like some solder joints are bad. I'm seeing cracks in the solder.
ETA: Well, they have been fixed. Reflowing the solder fixed it. My 15 year old speakers are working again. They have survived 6 moves including to Germany and back. I guess let this be a lesson that the fix can be simple. I'll give it a few days to make sure the static/popping is gone.
This is what I have. (not my picture)
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