Build Your Own Arcade Controls Forum
Main => Everything Else => Topic started by: ChadTower on March 02, 2006, 08:54:03 pm
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All of a sudden our main home theater receiver sounds like ---Cleveland steamer---. I haven't done a full round of tests yet,but from multiple devices (Tivo, DVD player, VCR, Dreamcast) I see the same symptoms. They ARE all routed through a Pelican switchbox, and I still have to bypass that to test, but as of now it looks like the issue is the receiver.
What I see so far is barely any audio to left front and very scratchy audio to right front. I still have to find a DVD that can run tests around the rears and center.
The sucker was fine yesterday, we use it a ton, and have been using it for 4-5 years. Anyone here familiar with audio receivers enough to give me some pointers? I'm much better at soldering than I was before and repairing a thru plated PCB doesn't scare me.
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Blame the pelican first.. unless that receiver has FM, if it does, test it through that..
Turns out to be the receiver, it could be a few things, maybe a blowing cap for the audio digitalizy thingy (no idea what the real name is)..
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Hooked the Dreamcast directly up to it, same results... swapped speakers around, same results no matter the speakers... definitely the receiver. The Pelican does not seem to be the issue.
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Check for bloated caps, and fuses going out :)
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Inline fuses? Would there be fuses around the outputs? I haven't opened the thing up yet.
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Inline fuses? Would there be fuses around the outputs? I haven't opened the thing up yet.
Possibly.. depends on year/make/model/designer... ive seen some stupid fuse placements honestly..
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well, let's put it this way. This thing retailed for $170 4 years ago, so I wouldn't expect anything high end in there.
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well, let's put it this way. This thing retailed for $170 4 years ago, so I wouldn't expect anything high end in there.
Crack her open.. ;D
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Will do this weekend. Gotta clean off the workbench first and it's piled high with crap.
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have a good check around the PSU, crackling / distorted sound sometimes indicates a lack of negative supply
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Caps or amp ic-you never know dry joints on inputs/outputs
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have a good check around the PSU, crackling / distorted sound sometimes indicates a lack of negative supply
Even if it's only on one output?
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Did you check the speaker outputs sometimes the spring loaded connecter gets dirty and causes a bad connection. Also is there pots/volume control for the front speakers?
If so turn off the amp ajust the pots max to mini quickly about 5 times for each pot. Sometimes the pots get dirty and cause audio loss.
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No pots, not that fancy a receiver. I think if the connectors were dirty it would have become obvious while I was switching the speakers around (changing which speaker was connected to each terminal)... so that's out too.
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If the receiver is only owrth that much, would there be any point in trying to fix it?
Sounds like it had a good run and my just have to go to silicon heaven.
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I'm probably going to replace it with a refurb Harmon Kardon.
It may actually have gone to Silicon Heaven with all the calculators.
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Even if it's only on one output?
sometimes on 5.1 amps they use seperate supplies for seperate channels, (although thats usually on higher grade amps) my big sony has 5 seperate psu's inside so that a high output on one channel doesnt affect the other channels in any way
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I'll keep that in mind but would be really surprised if this one was set up with 5 power supplies...
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Replaced with one of these (http://www.harmankardon.com/product_support/support_detail.aspx?Region=USA&Country=US&Language=ENG&cat=&prod=AVR%20235&sjump=&#active).