help! no power, im lost

jdbrocious · 19th February 2008, 08:58 PM

I am buiding a monoblock kit and i have checked all the connections, but I still have no power going through the unit. I can't even blow a fuse or anything. How/where do I start to trouble shoot. Here are some pics, most everything is soldered except where I had to extend some wires. The power switch and a few other things are just hanging out until I figure out what is going on. I do have a multimeter, but I'll i could figure out was that it was operating at 60 volts. Im new to this electrical stuff.

SY · 19th February 2008, 10:07 PM

Start with the line plug (unplugged!). Using an ohmmeter or a continuity checker, connect between each power cord prong and the transformer primary (switch "on"). If you have continuity, you've got a transformer issue. If you don't, then leave the ohmmeter lead connected to the power cord prong and with the other lead, start working back to the power plug until you find where the connection is lost.

dsavitsk · 19th February 2008, 10:12 PM

I don't know what the issues is, but you need to put some rubber grommets in those holes as you have high voltage wires passing through holes in metal with sharp edges. Also, the fuse should be before the switch -- connected directly to the power inlet.

jdbrocious · 20th February 2008, 01:06 AM

guys at audiokarma said the same thing about rubber grommets, and I will put those in. right now there are NO nicks/cuts or anything on the wires coming through the holes.

im not sure I follow about the fuse, should it be in line coming from the EIC plug to the switch?

jdbrocious · 20th February 2008, 01:09 AM

maybe im explaining my problem wrong

i have 60 volts moving through the EIC plug. so there is power to the unit, but i don't know if its going anywhere from there.

I touched both ends of the fuse, and there is an ohm rating. does that mean anything?

duderduderini · 20th February 2008, 01:31 AM

Hi
So you have mains going into the transformer?
And voltage coming out?
I second dsavitsk in recommending grommets. I am sure i can see one of the black wires been stripped as its scraped along the hole...a disaster waiting to happen.
I am not perfect but I dont like those dreadful crimp connectors.. i prefer solder and heat shrink for all and often use 2 or 3 layers of heat shrink.
Again I do not mean to criticise but some of your solder joints may be dry by the look of them
Good luck
Take it easy play it safe and methodical (read the safety directions)
Nick

jdbrocious · 20th February 2008, 01:42 AM

Quote:

Originally posted by duderduderini
Hi
So you have mains going into the transformer?
And voltage coming out?
I second dsavitsk in recommending grommets. I am sure i can see one of the black wires been stripped as its scraped along the hole...a disaster waiting to happen.
I am not perfect but I dont like those dreadful crimp connectors.. i prefer solder and heat shrink for all and often use 2 or 3 layers of heat shrink.
Again I do not mean to criticise but some of your solder joints may be dry by the look of them
Good luck
Take it easy play it safe and methodical (read the safety directions)
Nick

one main from the transformer goes to the EIC, and the other to the fuse.

it must be completing a circuit because i show 60volts at all points along this path.

the wires are NOT scraped.... i will wrap them to be on the safe side until i find the grommets.

this is my first soldering job and i think my iron is way to weak, it takes forever to melt. Is there such thing as too much solder?? what does dry mean?

duderduderini · 20th February 2008, 03:17 AM

Go to here it seems a decent site
http://www.instructables.com/id/How-to-solder/
When you say 60 volts.. whats the volts at the power point? what are the ratings of the transformer?
As i found out a good soldering iron is essential if you are going to do this more. 700 to 800 degrees tip temp with enough mass to sink heat into things you are soldering. Most irons are for solid state. For tubes think binford.
Good luck
Nick

duderduderini · 20th February 2008, 03:27 AM

Hi Again
Look at this post
http://www.diyaudio.com/forums/showthread/t-65709.html
post number 15
Hope this helps
Nick

jdbrocious · 20th February 2008, 03:29 AM

thanks for the link.......i think im using way to heavy solder for one thing.

as for the 60 volts... thats what is coming through the EIC, from my power cable.

i dont know how to tell what is coming out of the transformer

19th February 2008, 08:58 PM	#1
jdbrocious diyAudio Member Join Date: Mar 2005 Location: PA	help! no power, im lost I am buiding a monoblock kit and i have checked all the connections, but I still have no power going through the unit. I can't even blow a fuse or anything. How/where do I start to trouble shoot. Here are some pics, most everything is soldered except where I had to extend some wires. The power switch and a few other things are just hanging out until I figure out what is going on. I do have a multimeter, but I'll i could figure out was that it was operating at 60 volts. Im new to this electrical stuff.

19th February 2008, 10:07 PM	#2
SY diyAudio Moderator Join Date: Oct 2002 Location: Austin, TX Blog Entries: 1	Start with the line plug (unplugged!). Using an ohmmeter or a continuity checker, connect between each power cord prong and the transformer primary (switch "on"). If you have continuity, you've got a transformer issue. If you don't, then leave the ohmmeter lead connected to the power cord prong and with the other lead, start working back to the power plug until you find where the connection is lost. __________________ “Listening to records is like ****ing a picture of Brigitte Bardot.” - Sergiu Celibidache

19th February 2008, 10:12 PM	#3
dsavitsk diyAudio Member Join Date: Jan 2005 Location: Chicago	I don't know what the issues is, but you need to put some rubber grommets in those holes as you have high voltage wires passing through holes in metal with sharp edges. Also, the fuse should be before the switch -- connected directly to the power inlet. __________________ http://www.ecpaudio.com

20th February 2008, 01:31 AM	#6
duderduderini diyAudio Member Join Date: Mar 2004 Location: Albury NSW Australia	Check your connectors Hi So you have mains going into the transformer? And voltage coming out? I second dsavitsk in recommending grommets. I am sure i can see one of the black wires been stripped as its scraped along the hole...a disaster waiting to happen. I am not perfect but I dont like those dreadful crimp connectors.. i prefer solder and heat shrink for all and often use 2 or 3 layers of heat shrink. Again I do not mean to criticise but some of your solder joints may be dry by the look of them Good luck Take it easy play it safe and methodical (read the safety directions) Nick __________________ "Better to say nothing and keep them guessing than to speak and remove all doubt."

20th February 2008, 03:17 AM	#8
duderduderini diyAudio Member Join Date: Mar 2004 Location: Albury NSW Australia	Try this Go to here it seems a decent site http://www.instructables.com/id/How-to-solder/ When you say 60 volts.. whats the volts at the power point? what are the ratings of the transformer? As i found out a good soldering iron is essential if you are going to do this more. 700 to 800 degrees tip temp with enough mass to sink heat into things you are soldering. Most irons are for solid state. For tubes think binford. Good luck Nick __________________ "Better to say nothing and keep them guessing than to speak and remove all doubt."

20th February 2008, 01:06 AM	#4
jdbrocious diyAudio Member Join Date: Mar 2005 Location: PA	guys at audiokarma said the same thing about rubber grommets, and I will put those in. right now there are NO nicks/cuts or anything on the wires coming through the holes. im not sure I follow about the fuse, should it be in line coming from the EIC plug to the switch?

20th February 2008, 01:09 AM	#5
jdbrocious diyAudio Member Join Date: Mar 2005 Location: PA	maybe im explaining my problem wrong i have 60 volts moving through the EIC plug. so there is power to the unit, but i don't know if its going anywhere from there. I touched both ends of the fuse, and there is an ohm rating. does that mean anything?

20th February 2008, 03:27 AM	#9
duderduderini diyAudio Member Join Date: Mar 2004 Location: Albury NSW Australia	wiring in the fuse Hi Again Look at this post http://www.diyaudio.com/forums/showthread/t-65709.html post number 15 Hope this helps Nick __________________ "Better to say nothing and keep them guessing than to speak and remove all doubt."

20th February 2008, 03:29 AM	#10
jdbrocious diyAudio Member Join Date: Mar 2005 Location: PA	thanks for the link.......i think im using way to heavy solder for one thing. as for the 60 volts... thats what is coming through the EIC, from my power cable. i dont know how to tell what is coming out of the transformer

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