Derp.Īlso, the WORKING board has 2SC2235 and 2SA965. I couldn't find a replacement with identical specs so I went with the closest thing I could find that was in stock. Why? It seemed like a good idea at the time and I was desperate to get the thing fixed. I couldn't find these in production anymore and I was in a big hurry so I substituted Q7 for KSC1845FTA Appears to be normal now after the most recent damage.Īs listed in the schematic, Q7 is listed as 2SC2235 and Q8 as 2SA965. Q10 - Has continuity across all pins, same as before.Ĭ3 - Had a slightly puffy top so I replaced it. It was the same color-code as R15 on the working HF board which read 8200ohm. That didn't match up with the original on the board. R15 - Listed in the schematic as 6200ohm. R17 - It was visibly burnt last time, but not as badly as this time. Since I can't add anymore, here's a link to everything I've tested on the board now, in schematic form: I can add more later, but I'm limited to six attachments. I'm only mostly embarrassed to show this.Īttached are some pictures of other places around the boards. I see no visible damage and everything seems to test as expected. Now that I'm not all stressed out about time, I realize I may have gotten something mixed up.Īs it stands now, one of the HF boards seems to be fine. I see now the Low Frequency board is on a different base, which I mistook the other HF board for. They're basically identical only they had different transistors. It wasn't until earlier when I started revisiting this that I realized there are actually *two* high frequency amplifier boards, with only one represented in the schematic. It's been very useful and from everything I've checked so far, has been accurate.
#Klipsch promedia 2.1 thx subwoofer replacement full#
That site has full schematics for the entire speaker system. In my haste, I chose something I thought would be "close enough" and probably chose waaaaay incorrectly.įor reference for anyone willing to give this a go: Part of the big problem with my original repair was that I couldn't find exact matches for replacement parts for two of the transistors. I'd like to now sit down and take the time to attempt a proper repair. With the wedding being 2 days away at that point, I stuffed it to the side and went about finding a different set of speakers. I quickly killed the power to it but clearly some serious damage had been done. I heard a "things aren't going to work out for you" electrical buzz from the board for a few seconds before a loud pop and bad-news smoke started to rise. I left the speakers and sub unplugged from the board and plugged it in. I was trying to get the speakers working for my upcoming wedding (sound system for a small venue on the cheeeeap) so I quickly bought new parts based on a schematic I found online and popped them in. Further poking around with a DMM found most of the transistors on the board had continuity across pins and a cap had a slightly puffy top. I popped open the subwoofer and poked around until I found a toasted resistor on the High-Frequency amplifier board. I swapped the speakers around and got the same thing, ruling out a speaker issue. No sound on the left channel, and very weak/distorted sound in the right channel.
![klipsch promedia 2.1 thx subwoofer replacement klipsch promedia 2.1 thx subwoofer replacement](https://i.ebayimg.com/images/g/o1kAAOSwK7tfSH1i/s-l640.jpg)
Moved them back to my computer a few days later and found really weird sound coming from them. Used them for the sound system at a gathering (mostly people hooking their phones up to play music from them) and everything was fine.
![klipsch promedia 2.1 thx subwoofer replacement klipsch promedia 2.1 thx subwoofer replacement](https://d2um2qdswy1tb0.cloudfront.net/product-images/ProMedia-2.1-Bluetooth-13.jpg)
Hello everyone! I've browsed around a bit looking for some help on repairing some speakers that have gone kaput and this place looked really helpful! I've tried to repair this on my own almost a year back but was in a rush and found myself out of my depth in short order.