Question about Philips HTS3450 System
Our HT began buzzing for about 1 minute after powering on. The buzz begins high then slows down to a crawl and then stops; audio works fine after that. We started switching it to an unused audio source instead of powering it off, which worked for a while. Now it does the buzzing whenever we switch between sources, too. Help!
Building on what WheatService said for any other newbs (like me) who may run across this...
1) Go to Radio Shack, get yourself two of the 272-1030 470uF/35V capacitors mentioned ($1.29/each) and a cheap soldering kit (mine came with solder and extras for $8). just take those numbers to the clerk, once he or she tries to sell you a couple cell phones, they should help you find the parts.
2) go home. disconnect the subwoofer from the wall, speakers, and dvd player
3) remove the 8 screws around the edge of the metal plate on back of subwoofer and carefully remove the metal plate and all the goodies attached to it. make sure to disconnect the two wires leading from the rest of the subwoofer to the circuit boards.
4) what you are looking at is two parallel circuit boards with a bunch of stuff in between them. to tell them apart, notice that one of the boards is home to a fan (amongst other things), and the other has the power cord running into it.
5) we want to remove the board that the power cord runs into, so make sure you've got the right one, and remove all of the screws which are holding it in place. again, be sure to unhook any cords before you yank off the circuit board.
6) once the board is removed, you should see two large heatsinks (pieces of metal). one is just a big rectangle that sticks straight up towards one end of the board and the other is kind of t-shaped (from the end) and a monstrosity. you'll want to look in the area between the two heat sinks but towards the smaller, rectangular one.
7) in that area, there may be some white foamy stuff sprayed around. take a look at the capacitors from radio shack and note their size. you are looking for two identical black, cylindrical capacitors roughly the same size as the ones you purchased (but a bit smaller). if you think you have the right ones, take a look at the side of them. you may have to scrape off some foamy stuff, but they should say 470uF/25V.
8) the basic idea here is that those 25V guys need to be replaced with 35V ones (the ones you bought). i'm no expert, but what worked for me is pulling lightly on the existing capacitors while melting the contact points from the bottom with the soldering tool. once those are removed, put the new ones in (push them almost all the way down so most of the wire is coming out the bottom). now turn the board back over and apply a generous bead of solder to each of the four wire points.
9) clip off the excess wire from the bottom, and marvel at your newfound expertise.
10) put the whole thing back together (steps 2-5 in reverse), remembering to connect the wires as you go.
11) turn it on and enjoy!
Posted on Apr 28, 2009
As I found somewhere on the internet; there are two 470uF/25V capacitors on the power supply board in the sub-woofer that are the cause of buzzing, crackling and then eventually no sound. Go to Radio Shack and buy two Catalog #: 272-1030 470uF/35V capacitors and change them out. They are in the middle of the Power Supply PCB and are close to the long flat aluminum heatsink. Make sure you match the polarity properly when replacing. Your unit will be as good as new and will proibably last forever now.
Posted on Jul 17, 2008
My suggestive solution for this page is to follow the guidelines to solution #5. My home theater had all of the problems mentioned on this page, from the high pitch buzzing, which eventually drones into a low synthesizer sounds, to inevitably not working at all. I was aware that the problem existed within the subwoofer only because the light on the front of the sub would go red when plugged up for the standby, but would not turn green when the receiver was turned on. After trying to get help from the Philips hotline, which was similar to talking to my grandmother about technology, I found this solution page and built the confidence to try solution 5. The fellow is a genius. I bought the things listed in his paragraph and followed his instructions with hardly any experience. The procedure took 15 minutes and the results are exceptional. I appreciate having solid guidelines to work with. Thank you
Posted on Dec 30, 2009
capacitors on the power supply board in the sub-woofer that are the
cause of buzzing, crackling and then eventually no sound. Go to Radio
Shack and buy two Catalog #: 272-1030 470uF/35V capacitors and change
them out. They are in the middle of the Power Supply PCB and are close
to the long flat aluminum heatsink. Make sure you match the polarity
properly when replacing. Your unit will be as good as new and will
proibably last forever now."
I did this and it worked perfect! The capacitors were $1.29 each and I had to get a sottering kit that was about $8 but it works and completely fixes it.
Posted on Jul 20, 2008
You can still use the speakers (not the sub) from this system by un clipping the little plastic harness on the end of the wire.
Posted on Apr 23, 2008
I have the Philips HTS3450 DVD home theater system. I have had it for over a year now, and love it, except.... In the past couple of moths we recently moved. After hooking up the system exactly like it was premove, I get a clicking sound that starts out spaced apart, and progressivly gets closer, and closer, until it becomes one high pitched sound from all my speakers. It reminds me of some kinda of warming up sequance. It started out rather quickly, and over the past few months has gotten longer and slower. There is no sound until it goes through this routine. once its done, all is well, until.... Today, no clicking, no progression to a high pitch union. Nothing. So now I have no sound what so ever. I have double, and tripled checked all connections. Recycled the power several times. Double and tripled checked all settings too. I do not know what could be wrong....
Posted on Apr 06, 2008
Mine died after 14 months. Out of warranty. It's junk. Bought a RCA system. I will NEVER buy Philips again. Period!
Posted on Feb 17, 2008
Hum, crackle, crackle, silence... and on the 14 month. Hmmmm. Sad that the propriatary design means throw the whole thing in the trash. Lesson learned...Phillips = designed obsoleteness.
Posted on Jan 14, 2008
Buzzing is the beginning of death for this system
Posted on Dec 13, 2007
Try to call Philips and check your warranty date. It is good for one year so hopefully call the tech support and return the units like I did for exchange.
Posted on Dec 19, 2007
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Posted on Jan 02, 2017
i had same thing happening until it finally died all together. no sound at all.....everything else works.....and sub lights up in standby. i took sub apart today....and found that 2 capacitors had swelled. you can see where i guess they got hot...because of the glue type stuff surrounding them went from yellow to browish -burnt color. so i'm looking for 2 capacitors before i can tell you if its the problem.
Posted on Jul 07, 2008
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