Radio Schematics

[Jerther]

Hi!

 

I pluggeg a connector into the wrong socket on the radio receiver of my truck (GMC K1500 1988) and a saw some fire well I got the radio open and found a blown resistor.

 

I'd like to know the resistor's value. Here is a picture:

 

 

thanks in advance ;)

[Krambo]

That's an easy one boss! ...however I can't make out the colors in your picture. Resistors values are determined by the color bands. Use this on-line calculator to determine!

 

Resistor Impedance Calculator

 

Good luck!

[Jerther]

Hahaha! not that easy ;) I know the color codes by heart, I actually work in electronics... the problem is... the resistor is really blown up... Gone to ashes... And I have no schematics.

[Krambo]

Nice ,...Take some alcohol to it with a Q-tip and see if it comes clean enough for it to be read. I am willing to bet that if you cut it out, the underside will be be visible.

[Jerther]

Sounds like a fairy tale to me... haha! but it's worth a try, at least... I'll give it a try when I come back home tonight.

[Jerther]

Nope! Nothing. The resistor is really blown up. Even the PCB is carbonized a bit

 

I've got some infos and I could get another receiver for 40$... but hey, a resistor is like 5¢!

[Jerther]

Come on please! I need to replace the module in my truck before it gets -40 out there

[Jerther]

Knowing that the module was good for scrap, I decided to try some values...

 

While trying, I noticed there was a burnt path under the big heatsink. I jump wired it.

 

I put a 10K pot where the burnt resistor was and I plugged the module back in the truck.

 

It's aliiiiiIiIIiiIiIveeee!!!! woohoo!

 

And I tried to move the pot but nothing seems to change. So I'll put a 10k resistor and it'll be good as new ;)

 

D*mn I HATE those insulation coated dual layered PCB...