Step 1: What and Why
In the radio, the voltage supply, is composed by :
This system is called "Output Smoothing" : principle : http://en.wikipedia.org/wiki/Image:Diode_bridge_smoothing.svg
The transformer supply 9 or 12 volts in AC, and the diode bridge transform it into DC, but there is always "variations" of current, then there is a capacitator to avoid this problem and have a stable DC.
A generator like this cost, approximately 20 â¬ -16 $ in an electronic store.
Step 2: Tools
-A brain (very cheap)
-An Iron Solder
-Multimeter : The most important thing
-Solder wire (I used Sn:99.3 and Cu:0.7%)
Step 3: Disassemble the radio
Found the screws, and remove them, in order to open the radio. Here in my radio there's only 4 screws.
Then, open it and look for the transformer and the first 4 Cables. There is 2 output for 1 input.
Red - Yellow, and Blue-Yellow . But they aren't interesting right now. What is interesting right now is the diode brigde : next step