HELP Trio L07M11

Moondog55 · 9th June 2009, 05:08 AM

Help sorrow!

My Kenwood/ Trio mono block just died.

I never smelled anything or heard any untoward noise but when I noticed my subwoofer wasn't working.

I just pulled the covers off the amp and I have found a big ( 1cm ) hole in the circuit board, but no apparent exploded components, does look overheated tho

Is there any-one here with experience in the old classic trios??

Is it worth trying to find a replacement board or is it possible to have a new one made??

Any Aussies living in Geelong or close by able to help??

Moondog55 · 9th June 2009, 08:00 AM

It's big, 1.5cm across, must have got very hot.

http://farm3.static.flickr.com/2443/...4d02fb.jpg?v=0

analog_sa · 9th June 2009, 09:11 AM

Quote:

Originally posted by Moondog55

Is it worth trying to find a replacement board or is it possible to have a new one made??

Finding a new board is extremely unlikely. The damage in any case seems easily repairable. But is this the reason the amp is not working? I find it very strange that anything can burn through the board without leaving smell, fireworks or pieces of dead components behind. Can you do basic troubleshooting? Is the damage in the PS area? Maybe a power surge caused the loss of incoming AC power. It may turn out to be trivial to repair.

Moondog55 · 9th June 2009, 09:32 AM

While able to work cross-overs and build speakers I find myself totally out of my depth with electronics.
I'm without even those basic troubleshooting skills.

Learning electronics and how to build and repair amplifiers was going to be my next 10 year plan.

I made the mistake of leaving the system switched on overnite, but the smell of burnt Bakelite lingers in the casing but no, I found nothing inside but a greasy residue, soot I suppose, inside the case

analog_sa · 9th June 2009, 09:43 AM

Although the damage may be quite minor, this amp is complex and not worth using as a test bed. Your best option would be finding someone from your neighbourhood to have a look. Best of luck.

Moondog55 · 9th June 2009, 10:16 AM

Thanx, that is what you get for buying old amps.

Must say when it was working it was superb and I have been using it now for 4 years, that works out at $80 per year

aparatusonitus · 9th June 2009, 11:03 AM

If you need schematic for Kenwood L-07MII and Kenwood L-07M service manual, drop me an email via PM.

Moondog55 · 9th June 2009, 11:33 AM

Thank you

'YGM

Stuey · 9th June 2009, 12:09 PM

Hi Ted,

You might also try Audiokarma, which is good for this sort of 'classic' gear.

I think Echowars has some experience with this unit, from having a quick look at AK.

Good luck

Stuey

Moondog55 · 10th June 2009, 05:22 AM

Thanks Stuey;
i'll try there as well

9th June 2009, 05:08 AM	#1
Moondog55 diyAudio Member Join Date: Jun 2007 Location: Norlane; Geelong: Victoria: Australia	HELP Trio L07M11 Help sorrow! My Kenwood/ Trio mono block just died. I never smelled anything or heard any untoward noise but when I noticed my subwoofer wasn't working. I just pulled the covers off the amp and I have found a big ( 1cm ) hole in the circuit board, but no apparent exploded components, does look overheated tho Is there any-one here with experience in the old classic trios?? Is it worth trying to find a replacement board or is it possible to have a new one made?? Any Aussies living in Geelong or close by able to help?? __________________ QUOTE" The more I know, the more I know, I know (insert maniacal laugh >here<) NOTHING"

9th June 2009, 08:00 AM	#2
Moondog55 diyAudio Member Join Date: Jun 2007 Location: Norlane; Geelong: Victoria: Australia	Picture of hole It's big, 1.5cm across, must have got very hot. http://farm3.static.flickr.com/2443/...4d02fb.jpg?v=0 __________________ QUOTE" The more I know, the more I know, I know (insert maniacal laugh >here<) NOTHING"

9th June 2009, 09:32 AM	#4
Moondog55 diyAudio Member Join Date: Jun 2007 Location: Norlane; Geelong: Victoria: Australia	While able to work cross-overs and build speakers I find myself totally out of my depth with electronics. I'm without even those basic troubleshooting skills. Learning electronics and how to build and repair amplifiers was going to be my next 10 year plan. I made the mistake of leaving the system switched on overnite, but the smell of burnt Bakelite lingers in the casing but no, I found nothing inside but a greasy residue, soot I suppose, inside the case __________________ QUOTE" The more I know, the more I know, I know (insert maniacal laugh >here<) NOTHING"

9th June 2009, 10:16 AM	#6
Moondog55 diyAudio Member Join Date: Jun 2007 Location: Norlane; Geelong: Victoria: Australia	Thanx, that is what you get for buying old amps. Must say when it was working it was superb and I have been using it now for 4 years, that works out at $80 per year __________________ QUOTE" The more I know, the more I know, I know (insert maniacal laugh >here<) NOTHING"

9th June 2009, 11:03 AM	#7
aparatusonitus diyAudio Member Join Date: Jan 2004 Location: Split, Croatia	If you need schematic for Kenwood L-07MII and Kenwood L-07M service manual, drop me an email via PM. __________________ Non é mai abbastanza...


	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

9th June 2009, 09:43 AM	#5
analog_sa diyAudio Member Join Date: Aug 2002 Location: Sofia	Although the damage may be quite minor, this amp is complex and not worth using as a test bed. Your best option would be finding someone from your neighbourhood to have a look. Best of luck.

9th June 2009, 11:33 AM	#8
Moondog55 diyAudio Member Join Date: Jun 2007 Location: Norlane; Geelong: Victoria: Australia	Thank you 'YGM __________________ QUOTE" The more I know, the more I know, I know (insert maniacal laugh >here<) NOTHING"

9th June 2009, 12:09 PM	#9
Stuey diyAudio Member Join Date: Mar 2006 Location: Perth, Western Australia	Hi Ted, You might also try Audiokarma, which is good for this sort of 'classic' gear. I think Echowars has some experience with this unit, from having a quick look at AK. Good luck Stuey

10th June 2009, 05:22 AM	#10
Moondog55 diyAudio Member Join Date: Jun 2007 Location: Norlane; Geelong: Victoria: Australia	Thanks Stuey; i'll try there as well __________________ QUOTE" The more I know, the more I know, I know (insert maniacal laugh >here<) NOTHING"

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

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
trio W-38 problems	damianl	Tubes / Valves	11	11th December 2010 09:59 PM
Trio TA-80W	radioeng	Chip Amps	2	3rd May 2009 11:11 PM
Trio W-45a Amp-	namatjira	Tubes / Valves	1	12th April 2008 04:14 AM
Trio (kenwood) LS-77	PTSOUNDLAB	Multi-Way	5	7th April 2006 09:04 PM
trio amp	latala	Solid State	1	24th February 2006 08:09 PM

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