tc3sean

I have replaced the bigger 5 caps all at once.

Does anyone have an idea if a certian bank of Caps are for just the subwoofer channel?!

Would anyone know what component or part could have gone out that is causing my sub to not work at all? Thanks. Im glad this thread is gaining interest again, and people are fixing their IFI's for once! Nice little schematic there Dbert. (ive replaced 5 large caps already)

damn..what a waste of my ******* money, after replacing all the caps this is how I feel about my speakers

Dbert-I used a heat gun on low and held it over the IC for a few seonds loosening the solder, and then just pulled off the IC. It was pretty easy. Todd-Thank for for some tips of using an ESR meter, I don't have access to one of those meters but that sounds like a good idea before changing out the caps.

yo dbert, alright let me start over a little I was pretty excited posting that earlier and maybe didn't think it out all the way. First thing I noticed was that the subwoofer would only work after about 1/2 volume iratically and then my left channel went completely out. Then I proceded to replace the LM1973 with this http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=LM1973M-ND But after i replaced it, the left channel still didn't work at all, neither did subwoofer. So I replaced both of those Caps and now the Left channel works great, but no subwoofer at all. (my volume dial is working great too this entire time, its the original one) Then I decided to change the LM1973 back to the original one and this didn't change the subwoofer issue. So now I am waiting on an order of (4) 35v 4700uf to replace the bank of 4 capacitors as well as the odd sized one so they will be all new matching cap's. Replacing the lm1973 wasn't a hard task at all, not to come off sounding cocky but you just have to have some fine solder, a steady hand and patience. I used my Hakko's 936L's stock tip(a soldering iron) which isn't a micro tip by any standards. So you can pull it off with a normal soldering iron but have to only use a small portion of the tip, or just invest in a small pinpoint type tip, and or soldering iron if you want to DIY and it will be cake walk if you have experience with soldering. Ill keep everyone updated once I get the new caps in next week. Im crossing my fingers that this will make my sub come alive once more. And also will point people in the right tracks of repairing their IFI's on the cheap. (radioshack only had the axial type, and I wanted to try to fix it bad so I bought the cap. Later in the day I found a local eletronic supply shop that has the correct ones and they're 1/2 the price as radioshack, 3.25$ vs. 6$)

I wouldn't say bad things at all about the new Zune HD. They're really badass. Ive had different ipods for over years, but I played with a zune for 10 minuets and wish I had one. Check em out http://www.zune.net/zuneHD http://reviews.cnet.com/mp3-players/zune-hd-32gb-platinum/4505-6490_7-33665869.html

Yeah of course, what's the issue with your set?

If anyone has any insight about my issue please respond. My Ifi's have been broken for some time now, but when they wern't my sub was cutting in and out depending on volume level, and I believe my left channel went out also. I replaced the LM1973 IC chip, and nothing changed. So today I was checking out the bigger capacitors and I noticed two of them were kinda puffed up a little on the top and have heard from someone that they were blown so I replaced the ones outlined in red, and now both channels work great, volume dial works fine. BUT I get nothing from the sub. Only a faint hum sound. So my question is what would make this hum sound, and should I go ahead and replace the other cap's? In red I outlined the caps I have already replaced.Thank you for any input on my issue. Don't worry about the size of the bigger one, its the same specs as the one that I replaced and radioshack didn't carry it in radial form.

FREE DOCKS FOR EVERYONE!!

If this makes sense 6$>100$ Then that's simply the answer!

I just fixed my Ifi's! Kinda sorta minus my subwoofer but both channels work properly. I just replaced one of the 4 capacitors, and the one I replaced looked a little convexed on the top. Boom now both my channels work! I bought the capacitor 35v 4700uf cap at radioshack for 6 bucks. Where do you reside Pedruin? Ill be glad to lend you a hand in soldering in a new capacitor If your local to me. []

If you have any experience with desoldering/soldering, then you should totally try and attempt to replace them. It's very simple if you know what you're doing.

Im going to try to replace that microcontroller inside the sub when I get around to it. Im not having any trouble with the 2 channels operating on their own, but Im having my subwoofer cut out at lower volumes. Ive checked the wires once, and their fully seated. Heres a place to buy it at http://parts.digikey.com/1/parts/467232-ic-audio-attenuatr-w-mute-20soic-lm1973m-nopb.html Is there a trick to desolder multi surface mounted point's at once?

I am as well having this problem. Except, My rsx's are working fine and sound great, But It's my subwoofer that is acting up. It works on and off, but rarely. It will work if I turn the volume up atleast 1/2 way on the pod, it doesn't matter either 3.5mm jack or Ipod dock. Subwoofer setting doesn't make a difference of it turning on, the volume just has to be atleast 1/2 way and it will turn on and off inttermitently, It;s very annoying! Is it that IC chip going out?! [:@][:S]