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07-13-2009, 02:31 PM
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#1 |
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Super Moderator
Join Date: Nov 2008
City & State: New Albany, IN
My Country: USA
Line Voltage: 120VAC 60Hz
I'm a: Student Tech
Posts: 10,745
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power brick dead
i got a power brick in the mail today
ran for an hour, unplugged it, replugged it, ran for a sec and died will not work popped it open to find no failed caps some tiny ones jwco everything with vents nichicon big one vz (m) series small ones pj (m) series bought from ebay store "monster power" need help since it will not shot wothout some glue its a ac 12v 4.0a used on a sharp flatscreen tv no power/led i have no dmm at this time
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07-13-2009, 02:42 PM
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#2 | |
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Super Moderator
Join Date: Jan 2007
City & State: New Jersey, USA
Posts: 2,292
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Re: power brick dead
Quote:
 .Not an expensive one a cheap 20 dollar one from Ratshack will do. A DMM is a bare basic for troubleshooting anything especially PSUs.
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07-13-2009, 02:47 PM
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#3 |
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Super Moderator
Join Date: Nov 2008
City & State: New Albany, IN
My Country: USA
Line Voltage: 120VAC 60Hz
I'm a: Student Tech
Posts: 10,745
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Re: power brick dead
fixed it
broken trace next to power plug made a thick solder bridge to fix it works fine now |
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07-13-2009, 02:50 PM
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#4 |
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Super Moderator
Join Date: Nov 2008
City & State: New Albany, IN
My Country: USA
Line Voltage: 120VAC 60Hz
I'm a: Student Tech
Posts: 10,745
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Re: power brick dead
oh and ivdo have one but it needs new batteries and doesnt do much
ill get one at the electonis store where i buy my equipment. they sell stuff at radarshaq prices but with primo quality. i bought my iron and sucker there and they sponsor the robotics team im on. the stuff they donated gets used and abused for 6 weeks of the year and the rest of the time it has to work on demand. never had a tool break, and they do the job well |
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07-13-2009, 06:39 PM
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#5 |
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Badcaps Veteran
Join Date: Mar 2008
Posts: 2,297
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Re: power brick dead
ratdude747 that good diagnosis, but you need to lay down short length of bare braid or wick across break and solder it. Solder alone is not strong enough and will crack again in short time.
Cheers, Wizard |
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07-13-2009, 06:45 PM
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#6 |
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Badcaps Veteran
Join Date: Mar 2008
Posts: 2,297
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Re: power brick dead
ratdude747 that good diagnosis, but you need to lay down short length of bare braid or wick across break and solder it. Solder alone is not strong enough and will crack again in short time.
Cheers, Wizard |
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07-13-2009, 09:00 PM
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#7 |
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Super Moderator
Join Date: Nov 2008
City & State: New Albany, IN
My Country: USA
Line Voltage: 120VAC 60Hz
I'm a: Student Tech
Posts: 10,745
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Re: power brick dead
actually, it broke because the cable they gave me fit too tight. if it breaks again ill just hardwire it and be done
what happened was i was fixing a cold joint i found when i noticed the mickey-mouse jack felt really loose. ant i saw the dead trace. the tight cable required so much wiggling that any jack would go like that. thank god i had another cable from an old dell laptop that fit much better what makes it all funny is if i returned it, i would pay shipping to and back, costing a total of over 2o bucks. i paid 30 for the cable. for 10m bucks id rater void a warranty and fix it in 10 min rather than wait 3 weeks for new cord and i paid 11 bucks at a goodwill for the tv. display model. small 13'' one, EDTV (in between SDTV and HDTV (1080p). great picture. |
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07-13-2009, 09:01 PM
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#8 |
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Super Moderator
Join Date: Nov 2008
City & State: New Albany, IN
My Country: USA
Line Voltage: 120VAC 60Hz
I'm a: Student Tech
Posts: 10,745
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Re: power brick dead
and is it so odd to find all major caps in brick to be nichicons in an el cheapo brick? and good, non hm/hn ones too.
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07-14-2009, 08:31 PM
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#9 |
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Super Moderator
Join Date: Nov 2008
City & State: New Albany, IN
My Country: USA
Line Voltage: 120VAC 60Hz
I'm a: Student Tech
Posts: 10,745
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Re: power brick dead
and still working...
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07-14-2009, 10:27 PM
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#10 |
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Super Moderator
Join Date: Nov 2008
City & State: New Albany, IN
My Country: USA
Line Voltage: 120VAC 60Hz
I'm a: Student Tech
Posts: 10,745
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Re: power brick dead
damn it, tv died. screen cracked. something fell on it or something. ill use the cable for a torpedo projector that needed a brick with same specs.
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07-16-2009, 05:54 AM
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#11 |
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Fuhjyyu Killer
Join Date: Oct 2007
City & State: Behind a soldering iron
My Country: New Zealand
Line Voltage: 230V AC 50Hz
Posts: 1,614
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Re: power brick dead
Damn, that sucks.
I had similar problem with the power supply for a wireless AP. Turned out to be an open startup resistor |
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07-16-2009, 04:00 PM
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#12 |
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Super Moderator
Join Date: Nov 2008
City & State: New Albany, IN
My Country: USA
Line Voltage: 120VAC 60Hz
I'm a: Student Tech
Posts: 10,745
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Re: power brick dead
oh s***. the damn projector needs a 5A, not a 4A. no wonder it wasn't very bright. ill modify the cord's connector to work with my eee pc.
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07-16-2009, 06:45 PM
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#13 | |
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Large Marge
Join Date: Aug 2008
City & State: Kalamazoo, MI
My Country: United States
Line Voltage: 0-120VAC 60Hz
I'm a: Hobbyist Tech
Posts: 2,811
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Re: power brick dead
This is why I use my astec 425W psu for powering things.
It has 12v, 5v, and 3.3v sense. (proprietary astec housecleaning chip for that) Not to mention 2 12v rails at 15A each, it makes a excellent lab/rc car charger/window fan power/well, you get the picture. Plus I will die before this thing does, and it was only $10.
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