Re: I screwed up
- From: default <default@xxxxxxxxxxxxx>
- Date: Sun, 13 May 2007 08:19:35 -0400
On 12 May 2007 10:33:17 -0700, pruitt4@xxxxxxxxxxx wrote:
Hello,
I bought a Profile AP740 Car Audio Amplifier and could not get it to
turn on. I had 12.7VDC reading between the power and ground wires (8
G), and I had 0.1 ohms of resistance between the ground point and any
bare chassis around it.
I could not get it to turn on, even after trying to bypass the remote
turn-on lead by putting a little 16G wire between the B+ terminal and
REM terminal to bypass the head unit's turn-on thing. It still would
not turn on.
Well, I screwed up bad. After all of this and a lot of frustration, I
disconnected the amp and inspected it and all that stuff. I started to
put the wires back into it and I put the ground in the B+ terminal and
without realizing this, I put the Power cable in the Ground terminal.
It made a spark and I pulled the power/ground cables out realizing
what I had just done.
Is the amp fried now? Any hope of it working again? What exactly did I
do to it? I wonder if the amp was even working in the first place
because it wouldn't freaking turn on!!
Thanks for your time
Reversing power leads on a consumer 12 volt car operated device ain't
necessarily the end of the world (but it could be).
They frequently incorporate a reverse biased diode inside the unit for
just that protection since there are idiots out there who will reverse
connect battery jumpers, chargers and switching transients may go
below ground in a car.
You may just need to replace a fuse.
The internal diode may be shorted as a result - and is easily replaced
and a power trace on the board or internal fuse may be open. You have
to open it up to check that stuff, and opening it may void a warranty.
Some manufacturers depend on the vehicle fuse or an in line fuse on
the power to the radio.
Your best course of action, after checking the fuse, is probably to
return it and let the retailer send it back as defective, but that is
your call and depends on your circumstances and those under which the
purchase was made.
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