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Schematic needed I have a Philips Subwoofer SW 990/17, that is dead. It has blown both 4 amp fuses inside the woofer. It is probably the rectifier diodes that shorted, but I would still like to see a scematic

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  • davidnc1972 May 21, 2009

    Schematic needet too. I have same problem, it is dead, but both fuses are OK. David

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5 Suggested Answers

night71
  • 327 Answers

SOURCE: dis-assembling subwoofer

Unless you are good with wiring and can accept having the front cover broken, then you can do it yourself. The speaker protector can be gently pried off but will probably break if not done perfectly. If you get the front cover off, there should be 4 screws holding the speaker. Remove them and then you can see inside. Take note of how the resisters are attached. You may need to solder if they are separated. If you are confident handling this job, go for it, if not, take it to your local repair shop.

Posted on Oct 29, 2007

Ecollier2012
  • 3459 Answers

SOURCE: dptv335 Philips 55PW9363


Did you ever get this set fixed? If so what was the solution?

Posted on Oct 24, 2008

  • 1 Answer

SOURCE: Sub woofer amp blown

looking for a replacement amp for mackie srm 450 woofer

Posted on Nov 14, 2008

easyq
  • 144 Answers

SOURCE: Fuse keeps blowing in the subwoofer on my Philips hts-3450

Replace the capacitors with ones of the correct v. Download latest manual from Philips website to verify if the capacity value is not a typing error.

Posted on Jan 29, 2009

srinivasb81
  • 51 Answers

SOURCE: Need to replace home theater subwoofer-Tivoli TDHT1 is the system

Hi,
You please check the ohms with the woofer watts so that the same frequency of the woofer you can fix of different company, otherwise there will be damage of the circuit board so please use the appropriate frequency of woofer speakers.

Posted on Apr 12, 2009

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1 Answer

I just bought a subwoofer and I cannot get it to work. I changed the receiver setting to SW = YES. Where is the correct place to plug it in the receiver, there are two subwoofer outlets.


Here's your manual. Check Pg. 9 for correct Sub Woofer connection. Leave the SW=YES setting as is if you any small speakers in the system. It can be set to SW=PLUS if you want all bass signals sent to the Sub Woofer. It should only be set to SW=NO if no Sub Woofer is connected. Experiment between the YES and PLUS settings and leave it where it sounds best to you.

If this was helpful, please rate it "4 thumbs up" - thanks & good luck!

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Hi i have problems with my subwoofer it wont play it's an alpine 12'' type e with alpine mrp m350 amp. there is light on the amp. how do I find out my subwoofer is blown or what else can be...


ok, your amp is in protect mode. either the speaker wires are crossed and shorting out, your woofer's vioce coils are melted and the speaker is blown or the amp is dead.

to determine if the speakers voice coils are melted, and thus the speaker being blown is the reason for the "protect" light, simply push in the cone of the woofer in gently with your hand. the woofer should move a little more than an inch, without any resistance, before bottoming out. if there feels to be any resistance, like a rubbing or scratching, before the woofer bottoms out, then your voice coils are fried, and you need a new woofer.

Nov 25, 2010 | Car Audio & Video

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Have Acoustimass 15 system. Subwoofer stopped working and I don't think the fuse is blown. Anyway it does not look blown.


OK - well "look" blown may not be a solid, engineering approved, check. You could take the fuse down to a local Radio Shack and have them test it. Good news is that they will probably have a replacement if you need it. OTHERWISE... Keeping the volume WAY down - you can try another speaker on that output. It doesn't really have to be a woofer, just something to verify the circuit is working. That should tell you if the pathway is good which then tells you if its the woofer or the amp/receiver.

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Brookstone Wafer-thin CD with MP3 player circuit failure...why?


sure, ur power amp section is completely shorted. meaning it is totally fried. get it repaired. it was a stupid idea to jump the fuse. u cud fry the whole thing!!! i sincerely hope it is only the power amp. if it is more than that u have only urself to blame. remember looks can be deceptive.

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1 Answer

Powered subwoofer doesnt work .stopped a couple of months ago.it reads SW on the amp display.sw is turned on -green light on-wiring is all healthy and snug.home theater hasn't suffered any abuse.always...


I sounds like you have blown the woofer. open the unit and check. first disconnect the leads on the woffer, then use an ohm meeter. If you don't have an ohm meeter use a 9v battery across the speaker terminals. If you hear a thunk when the battery touches the terminals the speaker is okay. If tyou don't it's gone. If the ohm meeter reads some number like 4 to 9 the speaker would be okay. If it reads nothing or 000 then it's gone. If you need a speaker you can order it from Pro Line Music 215-736-8055

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1 Answer

Philips TV 27PT6441/37 won't turn on - I know I need a 4 amp slow blow fuse. Will it be obvious where the fuse is located once I have the back cover off or will I need to find a schematic?


Yes it will be obvious and you don't need a schematic to find it. What you actually may need is an ohmmeter to find exactly what fuse is blown in case there are more than one fuse present. You can also find this symbol on the board that indicates the fuse. Sometimes this symbol is drawn inside a box.
c936f2c.jpeg

Nov 06, 2009 | Philips 27PT6441 27" TV

1 Answer

Need to replace home theater subwoofer-Tivoli TDHT1 is the system


Hi,
You please check the ohms with the woofer watts so that the same frequency of the woofer you can fix of different company, otherwise there will be damage of the circuit board so please use the appropriate frequency of woofer speakers.

Mar 28, 2009 | Audio Players & Recorders

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Sub woofer amp blown


The output of the transformer goes to a RS404L bridge Rectifier. the 4700uF cap are leaking. Did you work in this area?

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Power Light off & speaker not working


I had the same problem. The screws around the perimeter of the back plate must be unscrewed and the plate must be pried off as it is glued to the box. When replacing my fuse, 2A 5x20 GMA, it blew the fuse again. Disconnecting the second circuit board prevented the next fuse from blowing, but now the question is what is wrong with the circuit board? I cannot see any damage or shorts.

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