Exuro89 Posted July 31, 2011 Share Posted July 31, 2011 So today my ProMedia 2.1 started acting up. The left channel doesn't work at all. I've tested both satellites in each channel and both work in the right but not in the left. I've tried it on both my computer and an Ipod to check if it was a Windows setting but nothing works in the left channel. I am getting static out of the speaker when I'm plugging it in, but no source sound. Is there anything I can check in it that breaks easily? I looked at the fuses and they look fine. Not sure what to do other than go to a repair shop. Quote Link to comment Share on other sites More sharing options...
Ironsave Posted July 31, 2011 Share Posted July 31, 2011 Try wiggling the DIN plug with music playing softly. If that channel cuts in and out while wiggling; you need a replacement DIN plug. These are found on Ebay and I think Klipsch may sell them also..... If wiggling that connector does not make the sound come back/ cut in and out....... Next step is removing the plate amp and inspecting it. Look for something burned or crispy....... Quote Link to comment Share on other sites More sharing options...
Exuro89 Posted July 31, 2011 Author Share Posted July 31, 2011 Checked the DIN plug and wiggled it with the system on but nothing. On first glance I'm not seeing anything toasted but I'm about to take the plate off. Since this is the left channel is there anywhere in particular I should be look at? I noticed two boards that look the same and figure one is for each channel? Also, do the 2 3 wired cords each go to one channel? Quote Link to comment Share on other sites More sharing options...
Exuro89 Posted August 1, 2011 Author Share Posted August 1, 2011 Okay so I'm not finding anything that's burnt. I did however check out to see if the headphones are working and they are on both channels. I'm assuming headphones go through the same channels as the speakers, so that would most likely mean there's a problem between the connection of the sub and the speaker wire right? Found something that might be the problem, uploading pic. I haven't taken the board apart and am just looking around. Noticed this had a wire stickign out and looked a little brown. http://i.minus.com/ijtjOI.JPG Quote Link to comment Share on other sites More sharing options...
Ironsave Posted August 1, 2011 Share Posted August 1, 2011 Yep, that qualifies as toasty and crispy. I am not sure of the exact schematic or the rating of that part. (Looks like a cap or resistor of some sort; but IDK). Good Luck. Quote Link to comment Share on other sites More sharing options...
Exuro89 Posted August 1, 2011 Author Share Posted August 1, 2011 I don't know much about electronics but from reading the schematic the resistor next to it is 82-1/4w which looks a little burnt, might need replacing as well. I'm not sure about the transistor though. It says Q106 is 2sc 1815 and I have no idea what would be an equivalent to that. EDIT: So the resistor is easy to find online but I can't find the transistor for the life of me. Quote Link to comment Share on other sites More sharing options...
BHexum Posted August 2, 2011 Share Posted August 2, 2011 I may have the exact same problem as you Exuro89, and I believe we are in the same boat. My left channel is caput; it initially destroyed my speaker as well (nice burnt smell). Right channel works great, Din's been tested and headphones work great on both channels. I replaced both right and left channel fuses. When i plug the wires into the left channel pos/neg, the neg(-) sparks brightly and the speaker, even on 0% volume, hums very loudly. I'm an ubernoob at wiring and resistors and capacitors and transformers, so I don't actually know what this means. While my circuitry panel doesn't have any wires sticking out as yours does, mine appears completely disgusting: https://lh4.googleusercontent.com/-9WL4-rCaRCE/TjgwnpF5FKI/AAAAAAAAACk/f-jwbRP1bp8/s512/2011-08-02%25252012.12.53.jpg I'm at an utter loss of what to do besides search for someone with a blown subwoofer but working amp/circuitry and switch them out. I'm more than open to ideas and suggestions. Quote Link to comment Share on other sites More sharing options...
Exuro89 Posted August 2, 2011 Author Share Posted August 2, 2011 Yeah my power supply board is pretty much busted. Headphones still work but the volume is messed up and sound doesn't come out of the speaker now. I'll need to buy a new power supply board(which I can't find anywhere) or just find a used sub/amp. Talking to a Klipsch guy but they take forever to respond. Quote Link to comment Share on other sites More sharing options...
Pilky Posted August 8, 2011 Share Posted August 8, 2011 Same thing happened to my left channel. My left speaker actually starting smoking so i assumed it was the speaker itself and spent $25 on a replacement. Excited when the UPS man delivered it, i ran up stairs to plug it in only to find it STILL not working. So i opened up the sub and found the two fuses. Excited once again that i found the problem (or so i thought) i ran to Radio Shack and purchased new fuses. After installing the fuses i powered the system on and heard a low humming noise followed by the notorious smell of burnt electronics. I immediately unplugged the speakers. Opened the box again and found the same fuse was blown yet again. I replaced the fuse and tested the terminals on both the left and right side. On the right side i read 0 volts and the right side gave me a reading of 24V. At this point I'm stumped. If anyone has any other recommendations i'd love to hear them. Quote Link to comment Share on other sites More sharing options...
Pilky Posted August 8, 2011 Share Posted August 8, 2011 It appears as though someone else is having a similar problem. http://forums.klipsch.com/forums/p/141422/1441243.aspx#1441243 Quote Link to comment Share on other sites More sharing options...
Jonny_Satts Posted August 29, 2011 Share Posted August 29, 2011 I had the exact same problem happen to me today. My left channel just stopped. It is indeed a problem with the channel and not the speaker itself. When I plug that speaker into the right channel port at the back of the subwoofer, it works fine. I suspect something has blown inside but haven't opened it up for inspection...I only bought these speakers on July 31 so don't want to risk voiding my warranty or anything. With a few people reporting similar issues, I wonder if there is a design fault going on? Quote Link to comment Share on other sites More sharing options...
Pilky Posted August 29, 2011 Share Posted August 29, 2011 I ended up calling into tech support and he confirmed that it is the internal amp. Seems like this is a known issue as he knew what it was right away. To further confirm this there are tons of subwoofers on eBay without the guts. Seems like a design flaw from Klipsch. I'm still deciding if i want to spend $90 bucks on a new amp or to just get a new set of speakers from a different maker. Quote Link to comment Share on other sites More sharing options...
Pilky Posted August 29, 2011 Share Posted August 29, 2011 Johnny you might get lucky and open the amp up to find a blown fuse. There are two fuses in there, one for each channel. Chances are one of them is blown. They sell replacements at radio shack. However, if you're unlucky like me, they're blown for a reason and even after replacing the fuse it will blow the new one. Quote Link to comment Share on other sites More sharing options...
cbradshw Posted January 18, 2012 Share Posted January 18, 2012 I also have the same problem as the ports on this thread, a dead right channel. This was discovered after replacing the main power transformer. I haven't seen any signs of damaged components on the SP2 card and the fuses are fine when tested with an ohm meter. I also checked the speaker and wire over to the other channel and they work fine. I've tried a brand new controller but no change. I noticed in one of the earlier posts with the photo of the burned transistor. I wonder if replacement got the unit working again. I've checked out connectivity of my DIN cable and that seems good. Any progress from anyone? Christopher Quote Link to comment Share on other sites More sharing options...
cbradshw Posted January 28, 2012 Share Posted January 28, 2012 Hello again I thought I would add some follow up issues with my lost channel: Sub speaker terminals with no wires connected: 5.7 ohms Satellite speakers with the wires attached, tested at the ends of the wires: Left: 5.9 ohms, Right: 6.2 ohms I also decided to compare the output terminals for both channels on the back of the amp box as I have a failing right channel. The odd thing is that when I select different ohm ranges on the multimeter I get a different resistance reading. Also the readings tend to climb upward at a certain rate (like it's walking up(capacitor?)) and then rest at a value. Here are the channels and ohmic ranges: LEFT CHANNEL: Ohm Range 0 - 2,000 => (too high for this setting) Ohm Range 0 - 20,000 => 8,5000 ohms Ohm Range 0 - 200,000 => 55,000 ohms Ohm Range 0 - 2,000,000 => 385,000 ohms RIGHT CHANNEL: Ohm Range 0 - 2,000 => (too high for this setting) Ohm Range 0 - 20,000 => (too high for this setting) Ohm Range 0 - 200,000 => (too high for this setting) Ohm Range 0 - 2,000,000 => Starts at a high realing like 1,600,000 and then climbs out of this top range. There is a issue here. Any ideas where i can start looking? I do have schematics on hand for the circuitry. Christopher Quote Link to comment Share on other sites More sharing options...
cbradshw Posted February 4, 2012 Share Posted February 4, 2012 UPDATE: I have been carefully examining schematics and using a volt meter to determine that all proper signs of voltage are appearing at the proper places according to the schematics. I am beginning to suspect that the TL074 component chip is failed. I realized today from the TL074 datasheet that it actually contains 4 independent amps within itself! One for each satellite channels and two for the sub channel. There are two main output transistors on the SP2 card that I may consider investiating for failure as well. I leave these updates for other fellow repair travellers. Namaste, Christopher Quote Link to comment Share on other sites More sharing options...
cbradshw Posted February 20, 2012 Share Posted February 20, 2012 I HAVE SINCE FIXED THE THE RIGHT CHANNEL PROBLEM. Turns out to have been a corroded copper tracing on the circuit board before the signal goes to the amp card. See more details at my website: http://christopherbradshaw.net/The_Project_Bin/klipsch%20promedia%20subwoofer%20repair%20-%20page%201.html -- Quote Link to comment Share on other sites More sharing options...
cbradshw Posted February 20, 2012 Share Posted February 20, 2012 I HAVE SINCE FIXED THE THE RIGHT CHANNEL PROBLEM. Turns out to have been a corroded copper tracing on the circuit board before the signal goes to the amp card. See more details at my website: http://christopherbradshaw.net/The_Project_Bin/klipsch%20promedia%20subwoofer%20repair%20-%20page%201.html ----- Quote Link to comment Share on other sites More sharing options...
RalphCramden Posted July 19, 2015 Share Posted July 19, 2015 I had two of these systems and both failed. They were not overused or overworked. I will never ever buy another Klipsch product. Their service is bad, tech support is bad and clearly their product is bad. From the suggestions on this topic I have looked at all the capacitors and found several that were charred. It was not worth fixing as it would have required disassembling the whole thing to get to them and then replace several capacitors in a very tight place. I tried calling Klipsch and they took forever to answer and their solution was to send them $95 and that "might" fix the problem. So I tossed the systems in the garbage and am done with it. Quote Link to comment Share on other sites More sharing options...
traugdor Posted April 24, 2020 Share Posted April 24, 2020 I just got a brand new set of these speakers and I had the same issue. I was able to fix it by adjusting the cables inside the pod. Don't give up hope if you have this problem. It's an easy fix. Quote Link to comment Share on other sites More sharing options...
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