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Old 5th June 2012, 10:05 PM   #1
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Join Date: Jun 2012
Default Big problems. HELP

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...
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Old 5th June 2012, 10:13 PM   #2
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hook to a standard 12V car battery
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Old 5th June 2012, 10:23 PM   #3
johnr66 is offline johnr66  United States
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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.
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Old 5th June 2012, 10:45 PM   #4
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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??
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Old 6th June 2012, 12:21 AM   #5
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Sorry it is the 4th picture
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Old 6th June 2012, 12:24 AM   #6
kevinkr is offline kevinkr  United States
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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.)
"To argue with a person who has renounced the use of reason is like administering medicine to the dead." - Thomas Paine
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Old 6th June 2012, 12:51 AM   #7
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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???
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Old 6th June 2012, 01:02 AM   #8
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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.
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Old 6th June 2012, 02:51 AM   #9
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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
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Old 7th June 2012, 04:28 PM   #10
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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?
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