Big problems. HELP

Virumflame · 5th June 2012, 10:05 PM

I have just managed to destroy my two Ta2020 Lepai.
I can't find out why!
My setup is shown in the pictures! The amplifier just started smoking when I turned it on...

Virumflame · 5th June 2012, 10:13 PM

hook to a standard 12V car battery

johnr66 · 5th June 2012, 10:23 PM

Are you sure the red wire on the power cord connects to the inside of the barrel on the jack? Some of these are reversed (+ on the outside). Check polarity with meter. Bet it is reversed.

Virumflame · 5th June 2012, 10:45 PM

in the third photo in the upper right corner of the amplifier there is a little sign. That means that the outside of the power wire is minus and the inside is plus right??

Virumflame · 6th June 2012, 12:21 AM

Sorry it is the 4th picture

kevinkr · 6th June 2012, 12:24 AM

Check whether the red wire in your cable actually goes to the center conductor of that plug.

You probably know this already but you should always have a fuse in the line to the battery, not that this would have saved your amps - it might prevent some other mischief however. Your set up is not safe.

It is also a really a good idea to check the polarity with a meter before plugging in.. (Check twice, plug once.)

Virumflame · 6th June 2012, 12:51 AM

I had a fuse on 15 a on the plus wire. It is still intact... To many A perhaps or what???

I measured how many volts my battery had. When I measured with the minus wire to minus and the plus wire to plus nothing happend. Then when I switched it so plus were on minus and minus on plus. This does not have anything to do with my amps now being broke right???

jordheis · 6th June 2012, 01:02 AM

Show us the connections at the speaker. Shorted?

What test are you performing?

Also - your big red cable clamp is mighty close to the amp's case. I suggest better isolation of your power source.

djmeverett · 6th June 2012, 02:51 AM

Seriously
Yeah car battery with 60A potential with a 15A fuse?!!
The whole thing would catch on fire before that 15A popped.
How come you don't use a 12VDC/2A wall wart?
Just asking for smoke there....LOL

Virumflame · 7th June 2012, 04:28 PM

I am new to this world, and this is apparently a rookie mistake. What should I change in the setup so this won't happen again??? What size fuse? other things?

6th June 2012, 12:24 AM	#6
kevinkr diyAudio Moderator Join Date: Sep 2004 Location: Boston, Massachusetts Blog Entries: 6	Check whether the red wire in your cable actually goes to the center conductor of that plug. You probably know this already but you should always have a fuse in the line to the battery, not that this would have saved your amps - it might prevent some other mischief however. Your set up is not safe. It is also a really a good idea to check the polarity with a meter before plugging in.. (Check twice, plug once.) __________________ "Extraordinary claims require extraordinary evidence." - Carl Sagan

6th June 2012, 01:02 AM	#8
jordheis diyAudio Member Join Date: Jan 2011 Location: Minnesota, USA	Show us the connections at the speaker. Shorted? What test are you performing? Also - your big red cable clamp is mighty close to the amp's case. I suggest better isolation of your power source. __________________ I'm a Groove Puppy Striving to remove some ignorance every day (always starting with my own)

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5th June 2012, 10:13 PM	#2
Virumflame diyAudio Member Join Date: Jun 2012	hook to a standard 12V car battery

5th June 2012, 10:23 PM	#3
johnr66 diyAudio Member Join Date: Mar 2009	Are you sure the red wire on the power cord connects to the inside of the barrel on the jack? Some of these are reversed (+ on the outside). Check polarity with meter. Bet it is reversed.

5th June 2012, 10:45 PM	#4
Virumflame diyAudio Member Join Date: Jun 2012	in the third photo in the upper right corner of the amplifier there is a little sign. That means that the outside of the power wire is minus and the inside is plus right??

6th June 2012, 12:21 AM	#5
Virumflame diyAudio Member Join Date: Jun 2012	Sorry it is the 4th picture

6th June 2012, 12:51 AM	#7
Virumflame diyAudio Member Join Date: Jun 2012	I had a fuse on 15 a on the plus wire. It is still intact... To many A perhaps or what??? I measured how many volts my battery had. When I measured with the minus wire to minus and the plus wire to plus nothing happend. Then when I switched it so plus were on minus and minus on plus. This does not have anything to do with my amps now being broke right???

6th June 2012, 02:51 AM	#9
djmeverett diyAudio Member Join Date: Dec 2011 Location: Washington	Seriously Yeah car battery with 60A potential with a 15A fuse?!! The whole thing would catch on fire before that 15A popped. How come you don't use a 12VDC/2A wall wart? Just asking for smoke there....LOL

7th June 2012, 04:28 PM	#10
Virumflame diyAudio Member Join Date: Jun 2012	I am new to this world, and this is apparently a rookie mistake. What should I change in the setup so this won't happen again??? What size fuse? other things?