KEF PSW 2150 Need Schematic

skeoch · 10th July 2009, 10:26 PM

I need to repair my PSW 2150 Sub-woofer and the only schematic that I have is for the PSW 2000. It is close in many areas but of course my problem is not common to both models. Any help is greatly appreciated.

Regards,

John

john_skeoch_1964@q.com

feke67 · 2nd August 2009, 01:46 AM

Hi,

What issue are you having with your KEF 2150 ?

I will turn mine on and after ~ 20 seconds or so, I get a hum type noise with volume turned down. With volume up, bass is popping and distorted.

Any help ?

Thanks !!

feke67

skeoch · 2nd August 2009, 10:19 AM

Good evening,
I started out with a bad filter capacitor for the 'muting' relay then after a few hours of normal operation one of the power transistors shorted. In the process of making that repair I found that the heat sink to the out side of the case only had about 1/3 of the area covered with thermal compound. I did move the +- 15 volt regulators on to the same heat sink as the power transistors hoping to reduce some of the internal heat build up. If possible I would like to add a small fan to help lower the internal temperature. I'm about ready to put the amp back into service when i have a few spare minutes.

If you do not have a schematic for your amp I do have one available and would post one to you if you need it. I tried to ansewer you directly but I guess I haven't posted enough times to do that.

If I can off any more assistance please let me know. Sometimes I can be a little slow in answering as I am medically retired and some times I'm not up to checking my mail but I do get to eventually.

Regards,

John

Brad1 · 24th February 2010, 02:15 AM

Good evening,

I have had a coupe problems with my sw. The transformer went bad. then two filter caps were swelled up. I replaced them a few years ago but now I have no sound what so ever coming out. does anyone have any ideas on what could be wrong or does anyone have a schematic for the amp? I want thak you ahead of time or what you can do to help me. THANK YOU.

From Brad

rishard123 · 11th April 2010, 09:02 AM

Quote:

Originally Posted by skeoch

I need to repair my PSW 2150 Sub-woofer and the only schematic that I have is for the PSW 2000. It is close in many areas but of course my problem is not common to both models. Any help is greatly appreciated.

Regards,

John

john_skeoch_1964@q.com

bob10752000 · 7th June 2010, 08:51 PM

I have been after the info for the PSW2500 so thanks for posting the file :-)

Audio Ambiance · 27th January 2011, 11:28 PM

I know this is a bit of an old thread, but maybe you can help. I have this sub and it seems to work fine, then after a bit of playing...anywhere from 30min to an hour, I'll get a strange hum, buzz, distortion noise through it. It appears to be regardless of source, and it will continue even if the receiver is turned off. My best guess is something in the power supply, but I don't know for sure. It will last anywhere from 1 second to however long it takes me to jump up and unplug it. When it goes away or when I plug it back it, it plays just fine. Any suggestions on where to start? I have a service manual for it and I don't mind replacing PCB components. Thanks for any help you can offer.

kwaskow · 17th November 2011, 03:36 PM

Quote:

Originally Posted by skeoch

Good evening,
I started out with a bad filter capacitor for the 'muting' relay then after a few hours of normal operation one of the power transistors shorted. In the process of making that repair I found that the heat sink to the out side of the case only had about 1/3 of the area covered with thermal compound. I did move the +- 15 volt regulators on to the same heat sink as the power transistors hoping to reduce some of the internal heat build up. If possible I would like to add a small fan to help lower the internal temperature. I'm about ready to put the amp back into service when i have a few spare minutes.

If you do not have a schematic for your amp I do have one available and would post one to you if you need it. I tried to ansewer you directly but I guess I haven't posted enough times to do that.

If I can off any more assistance please let me know. Sometimes I can be a little slow in answering as I am medically retired and some times I'm not up to checking my mail but I do get to eventually.

Regards,

John

Hi - I am attempting to resurrect this old thread to see if I can get some help for my 2150 PSW. It lights up and seems to sense the input, but I get nothing for output....any help is appreciated!!

garrison777 · 22nd November 2011, 05:56 PM

Hi Kwaskow,

I have the KEF PSW 2150 as well. It worked fine for about 4 years and recently, when you first send a signal by turning on the receiver, all you hear is a buzzing sound. When sound signals are actually sent from a movie / game, etc there is cracking and popping.

It would be nice to see a schematic and or advice from someone who know's what parts could be bad. Possibly how to diagnose?

Thanks,
Garrison777

kwaskow · 23rd November 2011, 06:56 PM

bump - anyone?

10th July 2009, 10:26 PM	#1
skeoch diyAudio Member Join Date: Jul 2009	KEF PSW 2150 Need Schematic I need to repair my PSW 2150 Sub-woofer and the only schematic that I have is for the PSW 2000. It is close in many areas but of course my problem is not common to both models. Any help is greatly appreciated. Regards, John john_skeoch_1964@q.com

2nd August 2009, 01:46 AM	#2
feke67 diyAudio Member Join Date: May 2002	PSW-2150 - hum/noise Hi, What issue are you having with your KEF 2150 ? I will turn mine on and after ~ 20 seconds or so, I get a hum type noise with volume turned down. With volume up, bass is popping and distorted. Any help ? Thanks !! feke67

24th February 2010, 02:15 AM	#4
Brad1 diyAudio Member Join Date: Feb 2010	Kef psw2150 Good evening, I have had a coupe problems with my sw. The transformer went bad. then two filter caps were swelled up. I replaced them a few years ago but now I have no sound what so ever coming out. does anyone have any ideas on what could be wrong or does anyone have a schematic for the amp? I want thak you ahead of time or what you can do to help me. THANK YOU. From Brad

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
NAD 2150/3150 Schematic + advice	steve_aus	Solid State	1	22nd November 2011 06:15 PM
Help with Orion 2150 Gx	v-dub-guy	Car Audio	7	20th January 2008 02:25 AM
xtr 2150 shorting out.	1armed1	Car Audio	9	20th April 2007 06:56 PM
orion xtr 2150	mike49504	Car Audio	11	1st October 2006 12:19 AM


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

2nd August 2009, 10:19 AM	#3
skeoch diyAudio Member Join Date: Jul 2009	Good evening, I started out with a bad filter capacitor for the 'muting' relay then after a few hours of normal operation one of the power transistors shorted. In the process of making that repair I found that the heat sink to the out side of the case only had about 1/3 of the area covered with thermal compound. I did move the +- 15 volt regulators on to the same heat sink as the power transistors hoping to reduce some of the internal heat build up. If possible I would like to add a small fan to help lower the internal temperature. I'm about ready to put the amp back into service when i have a few spare minutes. If you do not have a schematic for your amp I do have one available and would post one to you if you need it. I tried to ansewer you directly but I guess I haven't posted enough times to do that. If I can off any more assistance please let me know. Sometimes I can be a little slow in answering as I am medically retired and some times I'm not up to checking my mail but I do get to eventually. Regards, John

7th June 2010, 08:51 PM	#6
bob10752000 diyAudio Member Join Date: Jun 2010	I have been after the info for the PSW2500 so thanks for posting the file :-)

27th January 2011, 11:28 PM	#7
Audio Ambiance diyAudio Member Join Date: Jan 2011	I know this is a bit of an old thread, but maybe you can help. I have this sub and it seems to work fine, then after a bit of playing...anywhere from 30min to an hour, I'll get a strange hum, buzz, distortion noise through it. It appears to be regardless of source, and it will continue even if the receiver is turned off. My best guess is something in the power supply, but I don't know for sure. It will last anywhere from 1 second to however long it takes me to jump up and unplug it. When it goes away or when I plug it back it, it plays just fine. Any suggestions on where to start? I have a service manual for it and I don't mind replacing PCB components. Thanks for any help you can offer.

22nd November 2011, 05:56 PM	#9
garrison777 diyAudio Member Join Date: Nov 2011	Hi Kwaskow, I have the KEF PSW 2150 as well. It worked fine for about 4 years and recently, when you first send a signal by turning on the receiver, all you hear is a buzzing sound. When sound signals are actually sent from a movie / game, etc there is cracking and popping. It would be nice to see a schematic and or advice from someone who know's what parts could be bad. Possibly how to diagnose? Thanks, Garrison777

23rd November 2011, 06:56 PM	#10
kwaskow diyAudio Member Join Date: Nov 2011	bump - anyone?

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read