CR_Logan Posted March 15, 2008 Share Posted March 15, 2008 The last few months I have been having some problems with the higher range sounds from my Klipsch 4.1 v.2-400 speaker system. At low volume everything sounds fine but when I crank it up the high notes become very static sounding. So today I decided I was going to figure out the problem or buy some new Logitech Z-5500's. I have had these speaker for over 8 years and people still marvel at the sound of them at my parties so I dont want to spend money to replace them if I dont have to. Here is what I have done so far to trouble shoot the problem. 1. Unhooked the speakers from my home PC and hooked them to my laptop, with the green cable hooked in to my laptop for the two front speakers there were no issues. The sound was great. I played it for about 5 minutes and had no issues at all, except for the amp getting really hot from it being cranked. 2. Then i unplugged the green plug for the front speakers and plugged in the purple plug for the rear speakers into the laptop. The sound was horrible. It was a high pitch hissing sound that was unbearable. I think i know the problem has something to do with the rear channel but have no idea what. 3. Now that I know the problem is not the Home PC or the sound card on the PC I plugged the green cable back into the home PC and played some music. Sound was good, no hissing on the high notes. Then i plugged in the purple plug for the rear speakers and the hissy high notes were back again. I didnt mention this earlier but all four speakers have the hissing sound on the high notes when the rear channel speakers are plugged in. So this eliminated what i though early on, a blown speaker or all four blown. 4. After all this hunting I decided to take some pictures of the CP-1 and the AMP. took the bash amp off and checked connections ... all appeared good ...Checked for loose or cracked resistors, etc... and all look good ...Checked for burnt areas from connections on the circuit boards and no issues that I could find ...see photos below Ithen took the CP-1 preamp appart and the circuit board has a brownish areaon it with all types of goo on it... not sure if this is the way it should look or not ... Here's a pic ... Is this normal? If you have experienced this issue or know how i can resolve it for cheap I would be happy to hear any suggestions. I want to get these babies back to the rockin that I am used to from them. Quote Link to comment Share on other sites More sharing options...
Tim_in_NC Posted March 16, 2008 Share Posted March 16, 2008 Yes ... I had a very similar problem ... There is a guy on Ebay that use to repair the boards ... I can't remember his name off hand ... I'll try to dig it up ... Quote Link to comment Share on other sites More sharing options...
Paragon Posted March 25, 2008 Share Posted March 25, 2008 Did you hook the front speaker pods into the spot for the rears and test just the rears? iirc.. the brown goo is glue to hold those caps down so they do not get damaged. How does the headphone output sound? with and without the rears plugged in? You may want to pull the other two screws form the CP and look at the other side of that board. Possible that one of the opamps might be toasted or something. Quote Link to comment Share on other sites More sharing options...
acmestone Posted April 30, 2008 Share Posted April 30, 2008 I have the same problem as you do, although somewhat different. My subwoofer stopped working, and I popped the lid and took a look inside. (your picture) See the gray resistor on the right side? The board underneath it has been burnt and the resistor previously had colors indicating the value/tolerance. I haven't had a chance to check it with an ohmmeter, but I'm guessing it's a lot lower resistance now. You'll also notice the band on the right "snapped" from the heat at that location. Again, exact same thing happened to me and this looks like the only bad component. In my situation, I only want to get the subwoofer to work (my 4 satellites work fine, but I don't use this as my main amp any more), so I might try to shuffle the amps so that a different one powers the sub (change the jumper on the amp board and connect it to the sub). R12 = 680 ohms. R26 might also be scorched, it's probably hard to tell. http://forums.klipsch.com/forums/t/95829.aspx http://forums.klipsch.com/forums/p/84603/849925.aspx#849925 I'm going to try to replace my two resistors (I have to find R26 first), and see how that goes before I resort to using a different amp for my subwoofer than the other speakers. - Adam Quote Link to comment Share on other sites More sharing options...
architect4122 Posted August 18, 2009 Share Posted August 18, 2009 Adam, Did you get it fixed? Did it work? Quote Link to comment Share on other sites More sharing options...
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