drcigg

It's tough to say for sure what is causing it. Have you tried plugging headphones into the control pod to see if it still buzzes? Two things I have seen cause this. One is the control pod and the other is some components that go bad. I had a muffled sound on mine that was fixed by replacing 3 capacitors on the ac dc board. 3 caps to the left of the big transformer. The transformer gets very hot and unfortunately the components can't take the heat for long and they end up burning up. I replaced over 30 components on my board with brand new ones because they were either toasted or looked somewhat orange or brown. First try the headphones then open up the subwoofer and check the board for anything burnt. You can see my previous posts if you click on my name. I pasted a huge explanation I had gathered over the years from the forums here.

Anyone looking for klipsch parts this may be something you are looking for. I know the speakers and control pods are hard to come by. Speakers http://www.ebay.com/itm/KLIPSCH-PRO-MEDIA-5-1-SURROUND-SOUND-SPEAKERS-COMPUTER-HOME-SPEAKERS-/270905570403?pt=Speakers_Subwoofers&hash=item3f133af463 Working subwoofer http://www.ebay.com/itm/Klipsch-ProMedia-5-1-Subwoofer-/160726645787?pt=Speakers_Subwoofers&hash=item256c0dfc1b control pods http://www.ebay.com/itm/Klipsch-Promedia-Ultra-5-1-Control-Pod-Controller-Used-Functions-PERFECTLY-/230738488662?pt=PCA_Speakers&hash=item35b915ed56 As is complete speaker system http://www.ebay.com/itm/Klipsh-ProMedia-Ultra-5-1-computer-speakers-Pro-Media-Box-As-IS-Complete-/290664758554?pt=PCA_Speakers&hash=item43acf83d1a

No idea on that one. Some people swear by the fan as keeping the unit cool while others say it's replacing the components that are known to get to warm. Elliot the main guy that repairs these things and has repaired hundres of these says the heat can only be fixed by replacing with better quality components. Mine is running pretty cool without the fan. I replaced my resistors, diodes, transistors with ones that can handle higher temps. There was something here on the forum about 3 or 4 years ago however those are all long gone as klipsch waxed everything clean.

This guy repairs them and sells a fan kit for the speakers. http://www.ebay.com/itm/COOLING-FAN-KIT-UPGRADE-Klipsch-ProMedia-5-1-THX-Ultra-amplifier-/230734991797?pt=PCA_Speakers&hash=item35b8e091b5

Heres some stuff I copy and pasted from a word document I found on my computer. This may be of help to you. Towards the bottom there is a parts list of all parts that commonly fail. I replaced every component on the list as well as a few other components and mine works like new. Any questions feel free to ask. My 2 year old Ultras just stopped working yesterday. I read all the information here and on other sites. Some misinformation exists and other information is not available. I called Klipsch Support this morning and they were very sorry and very helpful. Unfortunately my unit is out of warranty and this is what they said. One Year warranty on ProMedia Ultra 5.1 First Step: Check the power fuse.......... Behind subwoofer, remove panel with all connections… (the Amp module). 12 screws............. Carefully pull panel out via top left corner and bottom right corner................ You will feel resistance as wires are pulled. Ease it out carefully and then disconnect 4 wires from the two subwoofers using the quick connects, note the wire arrangement for later replacement. (Do not try to disconnect wires from amp side)......... Observe the power cord on the inside of the amp panel to locate the fuse on the right side of the power wires............. The fuse is a Slow Blow 5 amp part # 270-1067 (get one at Radio Shack).............. Fuse might not look blown but replacement is recommended to be sure. Install new fuse and reconnect 4 wires to subwoofers. Reinstall panel with 4 corner screws and reconnect all components............... Turn on power to unit (with no music) and listen for any sounds from sub to determine if fuse may blow again. If no unusual sound was present turn on music from the computer to see if unit works properly............ If fuse blows again Amp module must be returned to Klipsch............. If fuse is not blow but unit still won’t work return Amp module to Klipsch............... If everything works again, install remaining screws and count your blessings............. To return amp to Klipsch: Call first, setup case and get RMA #. Cost will be $60.00 plus shipping to Klipsch. They will return in 2 weeks postage paid............ Hope this helps others............. Al Mine died recently. I replaced two FETs (soldered all of six pins and replaced a little thermal goop) on the satellite side of the pre-amp. Problem solved. Most of the problems are going to be in the two power boards or the pre amp due to their high heat levels and the fact that they will bear the worst of any surge other than perhaps something crazy happening to an audio input. As a preventative measure I went ahead and replaced a chipped ceramic cap aas well as moved a power resistor away from the power supply board to somewhere cooler with a couple of short wires. I just ordered a 120mm 240VAC fan that will run undervolted via the output of the relay on the AC input board. I am planning on punching a hole in the front of the sub enclosure so the fan can force in cool air. Way I figure any acoustic side effects are minor compared to a dead amp. Hopefully the lower temps will give me many years before I have to fix them again. hopefull by then I'll have a degree and a good job to buy me something larger. I heard about the Elliott guy on the Klipsch forums. According to those that used his services he does good work and has good service. For me, it wasnt worth the time and money since Im an intern in a electrical failure abnalysis lab.. http://www.hardforum.com/showpost.php?p=1028862277&postcount=89 Is your set an Ultra? If so check R527 in the power supply section. I also have a dead amp, i've been scouring the web and seems like the mini regulator on mine is toast. BASH HC1011. Which you can buy from infinity/HK. I haven't fixed mine yet, because something caused that regulator to fail. Either from a bad sat. amp or just overheated. The fact the sub is working means the section with the R527 resistor is still working. Most likely the regulator board on the board with black heat sinks has gone bad. The best way to troubleshoot the regulator is by swapping in a replacement board (not practical for a do-it-yourselfer). There is a small chance that one or more of the satellite amplifier boards has gone bad, drawing too much current and causing the regulator section to fail. See what the voltage to the satellite amps is (should be at least 7 volts for a non-Ultra). Current at idle (no signal) should be under 1/2 amp going to all 5 satellites combined. (Again, that will be hard to measure if the regulator board is dead). I'll guess your satellite voltage and current is now 0. I get .5v coming out of the sat board. I get 10.5v coming out of the sub board. Out of the power supply, I get 56.5v into the sats and 84v into the subs. I got help from a guy that repairs these things for money. This is as far as i've gotten. He would charge about 50+ shipping including an upgrade mod to cool the power supply. He Install fans on the power supply section. This is as far as i've gotten. I just didnt want to spend the 20 bucks yet and figure that it'll be busted again. Still debating if i should just get it repaired for 50 bucks. Hope this helps. I replaced R527 with a 2 watt 47 ohm resistor and now my subwoofer and satellites work but the sometimes the signal has static. The problem is easy to hear at middle volumes like between 25 and 45 (on the klipsch controller) but I when I turn he volume up to 60 or 70 the static is much harder to hear. I read on the klipsch forums that someone was saying that there's a "special diode" which connects to R527 and can sometimes be problematic. However, he only said it was a "special diode." Could he meant like a zener diode or germanium diode or something like that?? Does anyone have any idea what he meant by special diode or if this relates to my problem at all? i havent tried this yet but i hope this helps out a little. my promedia 5.1 sys. is also dead. amp works with sub only. seems that the MOSFET switches are dead. heres what to do.... this solution is for those of you with the problem of the Satellite speakers dying or cutting off and on, but the SUB is ok. This solution probably also fixes those systems which have the opposite problem: The SUB cutting out or dead, but the Satellites are ok. Both SATS & SUB use identical components (chips) for power switching, but are on opposite sides of the same board. OK, here what you’ll need to do You’ll need to know basic soldering, so you’ll need a soldering iron with a fine (small) tip, solder, and soldering flux. Also get a solder sucker to remove the old solder. Don’t use the copper braid stuff to remove it; it takes too long to heat up and that extra time can heat damage your board’s components. PARTS NEEDED: Quantity 2: high speed MOSFET switches, part number IRFZ44N. Part number IRFZ44 can be used as well. Equivalents from other suppliers will work too. These part numbers are equivalent to the NTE part number NTE2395. Go to www.NTEINC.com and use the cross reference. There you can read the spec sheet if you’re into that sort of thing. There, also in the specs, you can see a drawing of the part if you need a visual clarification. Click on the parts distributors in your state link to find parts suppliers nearby. I found a store nearby who had the IRFZ44 chips. There’s also online distributors, but beware online of the minimum order; that will cut into your savings! This NTE site is a favorite for “OLD SCHOOL” component level electronics troubleshooters like me! I’m not really “old” though, I can still dunk a basketball! (occasionally). !!!!!!!!!!!!!!!!!!!Remember to unplug your power cord 1st!!!!!!!!!!!!! The board you’ll be replacing parts on is the one containing the BASH circuitry. From here on I’ll refer to it as the crossover board. You can identify it by looking for the two little boards on it with the word “BASH” on the outside of each one. This board is the “switching” part of this switching power supply. This also is the signal crossover board; it separates the high and low frequencies. Notice the 2 big copper coil wound inductors, just like the crossovers found in car and home speaker boxes. This board also ties the low level preamp signals from your PC, to the high level amplifier circuitry of the Klipsch system. You can find this board by following the Red & Black wires that daisy chain across the top of the surround (SAT) boards back to where they start. Again it’s the board with the 2 smaller boards with the words “BASH” on their sides. To remove the crossover board, unscrew the 2 screws on the outside cover. You will also have to remove the 2 sets of Red & Black wires from each side of the crossover board. Label the wires accordingly. The words, SUB (+) & SUB (-) are on the board next to one heatsink, SAT (+) & SAT (-) are next the other. I will be referring to these wires again in the next section. The crossover board has 2 identical circuits, one side is for the SATELLITE speakers, and the other side is for the SUBWOOFERS. You can figure out which side you need by looking at the Red & Black wires mentioned above. The daisy chained Red & Black wires from the 5 SATELLITE amplifier boards plug into the SAT+/-. The other Red & Black wires with SUB+/- go to the SUB amplifier board. Remember, the SUB board is the only board not connected in the daisy chain. If needed, cut the cable ties holding these wires to make sure you trace them correctly. These wires plug into both sides of the crossover board. Remember to look for SAT+/- & SUB+/- written on the crossover board itself. There are 2 black heatsinks (plates) on each side of the crossover board near each Red & Black wire plug-in. The heatsink near the SAT plug-in is for SATS and the one nearest the SUB plug-in is for the SUBS. On each heatsink there are 3 black clips. These clips have holes on one side of them. These clips hold 3 chips on to the heat sink. Remove the clips. I used a small flathead screwdriver by lifting (spreading) the clip and sliding it off. Under each clip are the following: Quantity 2: MOSFET switches (a kind of high speed switching transistor). The number on these 2 chips is IRFZ44N. Quantity 1: Semiconductor Diode. The Part Number on this one is U1520. (You will NOT be removing this chip). It’s hard to find it aftermarket (not impossible) so BEWARE!! Hint: The MOSFETS have 3 legs; The Diode has 2 legs!!!! Remove the heat sink by unscrewing it from the board (2 screws). The 3 chips will stay in place. Take care not to damage the cards with “BASH” written on them or you’ll probably regret it! Remove the plastic liners from the back of the 2 MOSFET chips. You’ll need these for the replacement chips so do not throw them away, put them aside. You’ll notice there’s a white paste on them, this stuff is heat sink compound, available at any Radio Shack. I just re-spread & re-used the compound already on the liners and chips. Removing the 2 MOSFETS, Part Number IRFZ44N: I found it easier to just bend them back and forth until the legs snapped off. That way they are out of the way to get to at the solder joints. You’re going to heat the solder joints up. Put flux on the joints before you heat them. With flux, they will heat a lot faster causing less damage to the board. Suck the points clean of solder & remove the broken off legs using the solder sucker and a small needle nose pliers or tweezers Installing the new MOSFET chips: Push them through the solder holes making sure the backs of the chips (silver side) are towards the “BASH” cards, identical to the U1520 diode chip. If you put them in backwards you’ll probably regret it!!! Make sure the height of the chip is about the same as the U1520 diode chip. It doesn’t have to be perfect, but be in the ballpark. I did this by bending the legs on the solder side (back side) of the board when the height was correct. Solder the new chips on to the board. Solder on the back side only. Remember to dab flux on the legs and solder points first, this makes the solder flow fast and heats up the replacement chips less. Add new solder to the tip of the soldering iron only, not directly to the legs. This reduces the heat on the new chips. Touch the soldered tip of the iron to each leg of the chip. With flux on the legs, the solder will quickly flow into the solder joint. Add more solder to the iron as needed. Remember to cut the extra bit of leg off after each soldered joint when you’re done. You don’t want the legs to bend & touch or you’ll probably regret it. Viola! You got yourself a repaired crossover/switching board, (you repaired the switching part) and you saved some time & dough $$!! Re-install the heatsink and liners. Reconnect the plugs and remount the board. http://forums.klipsch.com/tags/Promedia+5.1+Amp/default.aspx http://blogs.ebay.com/elliot-tronics/entry/Klipsch-Promedia-Ultra-and-THX-Problems/_W0QQidZ160630017 Replace --- Replaced with R527 (4.7 ohm) --- CPF34R7000JKE14 R529 (5110 ohm) --- CMF605K1100FHEK 680 ohm (PCB position not labelled) --- RN70E6800FB14 MR7 (100k ohm) --- CPF2100K00BEB14 D5 and D6 (FR204) --- FR204-B All three 22uF (50V) capacitors --- EEU-FC1J220 (63V caps because they don't have the 50V versions. Same size as 47uF caps, fits fine though.) All three 47uF (50V) capacitors --- EEU-FC1H470 Q10 (2N5551) --- 2N5551RLRAG (also has properly spaced pins, unlike the original) now thats exactly what I was looking for thanks for going through the trouble it is appreciated im waiting on a spare sub im getting from ebay. i will make it work and let it heat up and use a temp probe to find hot spots and record my findings well Ive done some testing and have spoken to Evan about these amps. he suggested replacing R1/R4 with 470 2w resistors and R7 with 100k 2w resistors both on back of board. as a must and in my testing i have found R7 and R527 to be the 2 hottest spots on the board. now just to say this first I went overboard in upgrades on the ac/dc board and eventually will upgrade all boards for temp/efficiency/clarity i will also be upgrading the gauge of wires and replacing all interconnects with gold replacements. caps are all low noise audio replacements.as well as a new heat sink design but heres the list of components so far project manager cart daughter board R1/R4 with 71-CPF2470R00FKE14 R7 with 71-CPF2-B-100K Q3 with 512-MPSA92 R8 with 2f2DCT52R1001 R9 with 273-205K-RC now for main board DB1 with rs606M due to 200amp max surge as opposed to 150amp of original C517/C518/C525 with 647-UKW2A470MPD C519/C520/C532 with 647-UKW2A220MED 1000u 100v cap with 647-UKW2A102MHD 1000u 63v (couldnt go bigger due to space) with 647-UKW1J102MHD R527 with 71-CPF3-J-4.7-E3 R529 with 273-5.11K-RC (next to R529 unlabeled) with 71-RN70E6800F D5/D6 with 583-FR204-B Q510 with 863-2N5551RLRAG Q501/Q502 with 512-IRF740B D510 with 863-MUR1620CTG D504 with 863-MUR1660CTG U501 with 511-L7815CV U502 with 511-L7915CV R524 with 71-CCF02-J-47K R 2,3,5,6

Open it up and be sure to check the board for burnt components especially near the transformer and on the mini board to the right of the transformer. Most of my components were burnt on that board. I literally have replaced about 30 different components because they were burnt or looked burnt. All of the components were replaced with higher rated components. Diodes that can handle more current, bigger wattage resistors that were fireproof etc.... I had something similar but mine was more of muffled sound then hiss. I replaced all 3 tall caps to the left of the transformer. I think they were 1000uf. Then I replaced all 4 transistors next to it. D510, etc... Problem went away. Unfortunately a few years ago klipsch went thru and started deleting all the threads with fixes so I don't have any part numbers I can give you for parts. It sucks and yes this is a known failure with these speakers, but they truly are the best sounding speakers I have ever owned. I can try and see if I still have any info on part numbers in a word document somewhere if you need it.

Open it up and check the board with the transformer on it. It's very common for the components near the transformer to heat up or burn. I replaced over 30 components on mine and it's still working beautifully.

It's should be fixable. Inspect the main board with the big transformer on it for any signs of stuff that is burnt. It's very common for the the components near the big transformer to heat up and burn. I have replaced atleast 30 components on my board and it's working great still.

I had something similar but mine was more of muffled sound then hiss. I replaced all 3 tall caps to the left of the transformer. I think they were 1000uf. Then I replaced all 4 transistors next to it. D510, etc... Problem went away. Also be sure to check the board for burnt components especially near the transformer and on the mini board to the right of the transformer. Most of my components were burnt on that board. I literally have replaced about 30 different components because they were burnt or looked burnt.

Hopefully this helps someone out there that experienced this same thing. I have had this thing broken sitting in the closed for 5 years and just now got around to replacing more parts. It would play fine for about 2 or 3 minutes then the audio would get real muffled and cut in and out. Before today I had replaced a lot of parts. Basically anything that looked burnt or semiburnt I replaced. Today I replaced the 3 larger caps by the transformer as well as all 4 transistors on that side. U510, etc.... I also soldered all the traces on the transformer. I thought for sure I would be putting this thing back into the closet again. Fired it up and it plays just as beautiful as when I bought it. Going on 2 hours of audio with no muffled sounds. I hope this helps someone. These really are great sounding speakers.

Check this post http://forums.klipsch.com/forums/p/76749/757010.aspx#757010 and also this one http://forums.klipsch.com/forums/p/91000/920651.aspx#920651 Here are a few places to try. www.digikey.com http://www.partsexpress.com Radioshack Shipping can be over 5 dollars which is too much in my book. You may want to checkout your local radio shack or frys to see if they have what you need.

remove the 12 screws on the back of the sub. Unplug the black and red wires from the board. Take a look at the board and see if the fuse looks blown or if the MOV looks burnt(yellow or blue disk). Also look at each board to see if anything is burnt. Check all resistors, transistors, etc. R527 4.7 ohm resistor seems to be a common one to burn and the 2 diodes next to it. Replacing the 4.7 ohm with maybe a 2 or 3 watt resistor then replacing the 2 diodes with FR304 could solve your problem. I don't know much of anything about repairing it other then what I have read on the forums here. Unfortunately I contacted Klipsch to get mine repaired and they wanted 125 dollars. I haven't got around to fixing mine yet.

I don't believe you can buy just the amp. However there is a working subwoofer for the 5.1 setup for sale on ebay. Item #130256981968. Its at 20 bucks now. I imagine it will be much higher before it ends considering you can't buy the 5.1 promedias hardly anywhere now.