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Smitty Two Smitty Two is offline
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Default 12v dc DVD player wired incorrectly ie. polarity reversed to a 12v dc battery pack

In article . com,
terry wrote:

On Aug 30, 3:39 am, Tony Hwang wrote:
Michael B wrote:
There may have been an intervening diode.
If not, which is more likely, it's probably time to go shopping.
After trying it with the wires properly placed.


On Aug 30, 12:08 am, cmply wrote:


I had a working portable DVD player made by toshiba. That is until my
wife yanked out the wires to its battery pack,
And Just like a woman, she can't tell the difference between red wires
and black wires and which goes to what.
Im certain my 2 year old daughter wouldn't have had a problem wiring
red to red and black to black. Yep leave it to the one
I picked to spend the rest of my life with. oh dang!!


Anyways, I am curious to know if my DVD player is completely trashed or
whether it can be fixed easily enough or not.


DVD player was wired backwards, and it died, There is no sign of life.
What does wiring 12v backwards do to electronics
and is this repairable?


Id greatly appreciate any advice on what I might be able to do, besides
replacement of course, or giving it to the wife for
her christmas present.. hehehe
Thanks


Hi,
After checking the diode whether it is burnt open.- Hide quoted text -

- Show quoted text -


I kinda doubt if it is a diode!
The purpose of a diode if fitted as part of the circuit is to prevent
the 12 volt electricity going through backwards!
Therefore a diode shouldn't (although it's not impossible) burn up.
Some equipment omits items like that although a diode cost only a few
cents, for economy.
You could open it up just to see if their is something obviously burnt
up (maybe an internal solidly soldered in fuse?) that could be cheap
to fix. Could be the on/off switch if fitted has burnt up?
Otherwise prob. not, (unfortunately) worth spending time or money on
it.


Uh, fuses and on/off switches don't give a rat's ass which way the
electrons flow. I'd look for the diode as others have said, or other
problems near the power input, like a blown electrolytic or a cracked
solder joint from the strain of jerking on the wires. You can easily
trace the power with a voltmeter. This is definitely repairable, cheap
or free if you do it yourself, probably not worth it if you have to take
it somewhere unless it's an expensive piece of equipment.