02-24-2009, 07:15 PM
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#1
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Master of my Domain
Join Date: Nov 2006
Location: Toledo, Ohio
Posts: 4,072
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Yes, Caps DO blow up!
I bought an amp that had a blown cap. Should be an easy and cheap fix.
Just to illustrate that caps DO blow up. SO be VERY careful with them. I bet this small one (smaller round than a pencil, under .75" long) probably sounded like a fire cracker!
Imagine a 1 Farad blowing up. It would take your HAND off.
__________________
-Ryan
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02-24-2009, 07:19 PM
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#2
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on vacation
Join Date: Aug 2006
Location: that way
Posts: 2,169
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capacitors are hairy? 
on a more serious note.. wonder what caused that one to explode?
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WILL NEVER FORGET
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02-24-2009, 07:23 PM
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#3
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GLS member
Join Date: Apr 2008
Location: Roma, TX
Posts: 1,543
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I had a friend who had a 1 farad cap blow. He was connecting the battery terminal in the front, and boom, the cap blew in the back.
__________________
http://www.cardomain.com/id/nothingbutolds
Cleared corners-RF P1 Subs- RF 201S Amp- Memphis Audio 4x6's and 6x9's-JVC Arsenal KD-APD89 Head Unit-front and rear z-spec strut tower brace- KYB GR2 struts- Intrax Springs- Magnaflow Muffler
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02-24-2009, 07:25 PM
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#4
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on vacation
Join Date: Aug 2006
Location: that way
Posts: 2,169
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^ what kinda damage did that cause.. ?
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WILL NEVER FORGET
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02-24-2009, 07:34 PM
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#5
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Master of my Domain
Join Date: Nov 2006
Location: Toledo, Ohio
Posts: 4,072
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Thats the cardboard insulator in there... Not hair... lol
I bet that cap made him poop his pants!
__________________
-Ryan
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02-24-2009, 08:10 PM
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#6
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The Aleromod PITA
Join Date: Feb 2009
Location: East Carolina University, GVegas, NC
Posts: 1,852
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hey im new on capicitors, old system didnt need one, how can you prevent them from blowing
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02-24-2009, 08:16 PM
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#7
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GLS member
Join Date: Nov 2003
Location: Dayton
Posts: 1,485
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^^^ hook them up right
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02-24-2009, 08:19 PM
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#8
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Master of my Domain
Join Date: Nov 2006
Location: Toledo, Ohio
Posts: 4,072
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And charge them properly!
When charging a capacitor on first hookup you must use a resistor!
__________________
-Ryan
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02-24-2009, 08:30 PM
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#9
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A-mod Pirate
Join Date: Jul 2008
Location: Big Bad Cali
Posts: 3,016
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how i would i know whether or not i need a cap?
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02-24-2009, 08:37 PM
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#10
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GL Member
Join Date: Jun 2008
Location: Aleromod
Posts: 300
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Nobody seems to agree on whether they even do their intended function. I doubt it would solve my dimming, though since I did the (not so) big 3 w/ scrap 8 gauge I can only detect dimming at idle or at ear damaging volumes.
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02-24-2009, 08:42 PM
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#11
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A-mod Pirate
Join Date: Jul 2008
Location: Big Bad Cali
Posts: 3,016
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hmm im not pushin too much power just the stocks and then 2 12s in parallel on a 600 watt kenwood
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02-24-2009, 08:58 PM
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#12
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GL Member
Join Date: Jun 2008
Location: Aleromod
Posts: 300
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I was doing the same for a while. Until I upgraded I didn't really realise how crappy my mid base was. Now it blends beautifully; worth twice what it cost.
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02-24-2009, 11:33 PM
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#13
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GLS member
Join Date: Apr 2008
Location: Roma, TX
Posts: 1,543
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Quote:
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Midgear: ^ what kinda damage did that cause.. ?
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It was pretty bad. There was some liquid all over the trunk, and the rest of the car audio got effed up.
Sorry about this thread jack Ryan, but when connecting the cap, what is the trick to getting the display to light up? With me, sometimes I connect it and it lights up and stays working, then if I disconnect it for any reason, it wont work at all or maybe it will. A friend once told me there was a trick to getting the display, but I dont really know it.
__________________
http://www.cardomain.com/id/nothingbutolds
Cleared corners-RF P1 Subs- RF 201S Amp- Memphis Audio 4x6's and 6x9's-JVC Arsenal KD-APD89 Head Unit-front and rear z-spec strut tower brace- KYB GR2 struts- Intrax Springs- Magnaflow Muffler
Last edited by Valley olds : 02-24-2009 at 11:38 PM.
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02-25-2009, 12:02 AM
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#14
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AutoCross Alero
Join Date: Nov 2003
Location: South Texas
Posts: 2,759
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Quote:
Originally Posted by Valley olds
It was pretty bad. There was some liquid all over the trunk, and the rest of the car audio got effed up.
Sorry about this thread jack Ryan, but when connecting the cap, what is the trick to getting the display to light up? With me, sometimes I connect it and it lights up and stays working, then if I disconnect it for any reason, it wont work at all or maybe it will. A friend once told me there was a trick to getting the display, but I dont really know it.
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what cap are you running? |
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02-25-2009, 06:30 AM
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#15
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Gone
Join Date: Mar 2004
Location: Lockport Ny
Posts: 19,244
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Quote:
Originally Posted by Valley olds
It was pretty bad. There was some liquid all over the trunk, and the rest of the car audio got effed up.
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that liquid is oil, to separate the plates that hold the current w/in the cap.
and yes.. wiring it backwards is like putting a pipe bomb in your trunk. Thats why most big caps have that little "turkey tester" thing that pops up when its going to blow. You see that... you run. |
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02-25-2009, 07:51 PM
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#16
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Master of my Domain
Join Date: Nov 2006
Location: Toledo, Ohio
Posts: 4,072
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JBL is good people.
They got back with me already on the cap that blew. Now I need to just order the $0.25 part and replace it... lol
Im going to try Radioshack first. I doubt they have it though.
On the other hand I ordered $16 worth of parts from digi-key the other day and its here already!
I hope to have my frist repair job done by weekend!
__________________
-Ryan
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02-25-2009, 08:40 PM
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#17
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Gone
Join Date: Mar 2004
Location: Lockport Ny
Posts: 19,244
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ryan, whats the cap's numbers? i'll look right now
Edit: nvm, if you get this later then 9pm
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02-25-2009, 09:00 PM
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#18
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GLS member
Join Date: Nov 2003
Location: Dayton
Posts: 1,485
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Make sure you get a good quality cap. If you use a cheap brand they tend to dry out quicker and fail shortly there afterwards. You also might want to think about changing the other caps close to that one. When 1 cap goes they like to take others with them. Check the other ones around that one. If any of the tops of them are distorted replace it before applying power to it.
Although it looks like that one went fairly quickly so your probably alright just replacing that one. You should also try and figure out why that one blew violently like that. you may have the symptom and not the cause.
I replace caps almost daily on television power supplies.
Last edited by jamcllw : 02-25-2009 at 09:02 PM.
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02-26-2009, 12:00 AM
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#19
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GLS member
Join Date: Apr 2008
Location: Roma, TX
Posts: 1,543
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Quote:
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jabartram: what cap are you running?
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Oops, sorry I forgot about this thread. I am running a 1.6 farad lanzar cap.
__________________
http://www.cardomain.com/id/nothingbutolds
Cleared corners-RF P1 Subs- RF 201S Amp- Memphis Audio 4x6's and 6x9's-JVC Arsenal KD-APD89 Head Unit-front and rear z-spec strut tower brace- KYB GR2 struts- Intrax Springs- Magnaflow Muffler
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02-26-2009, 08:42 AM
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#20
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Master of my Domain
Join Date: Nov 2006
Location: Toledo, Ohio
Posts: 4,072
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Given the caps proximity to the RCA input, its likely somebody had a line driver on this amp and applied to much voltage to the RCA input.
Thats my guess. These are only rated for 5v input. Ive seen line drivers to 13 volts.
__________________
-Ryan
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