Yea, that protection diode blew for sure. That's its job. That's why I like an inline fuse on both the positive and negative power wire. If you have an inline fuse make sure to replace it first. Then you need to go to radio shack and pick up a replacement diode. 1N4001 will be the diode you need. It allows current to travel one way but not the other. So when you hooked the radio up backward it blew, like a fuse. Here is the diode at Radio Shack. http://www.radioshack.com/product/index.jsp?productId=2036268
When you pull the bottom cover off you will see this diode in the board right by the power cord connector for the radio. Most of the time they will be chipped or even split after blowing from reverse polarity. Pay attention to the little "arrow" on the diode because there is a negative and a passive to diode. Anode and Cathode as it were. The Anode flows to the Cathode. The "tip" of the arrow is the negative side.
Look with a flashlight to insure you did not blow a tracer too.
Hi looks like youve blown what we call the dummy diode at rear of radio this will have to be replaced although you can remove this yourself if you need it working pronto so firstly remove both covers of rig ,look closely at circuit board at the rear on the right hand side as you look you will see a black diode with silver stripe remove this ,your radio should operate fine now ,but please make sure you have it replaced as soon as possible as this protects your rig from damage goodluck
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- Hope this helps.
Regards,TonyHi looks like youve blown what we call the dummy diode at rear of radio this will have to be replaced although you can remove this yourself if you need it working pronto so firstly remove both covers of rig ,look closely at circuit board at the rear on the right hand side as you look you will see a black diode with silver stripe remove this ,your radio should operate fine now ,but please make sure you have it replaced as soon as possible as this protects your rig from damage goodluck