Because there is hardly any info regarding the TZR125 4DL CDI thought it would be nice to investigate this part further.
Always good to know how thinks work
Because the CDI is completely sealed, need to cut the plastic box
Started to submerged the unit into petrol
Slowly components came visible, her the IC
The capacitor came free
After three days it was clean
Because it is clearly visible that we talk about a Fujitsu MB885003H IC So the layout is known and it is easy to power it up with a 5V power supply.
A quick measurement showed the incoming pickup signal and the outgoing ignition signal
Pin19 is the incoming pickup signal
Pin29 is the outgoing ignition signal
Will be needing my eight channel oscilloscope as there is a lot off thinks happening.
First measurements show that it behaves similar to the TZR250 3MA CDI
-Below 33HZ the outgoing ignition signal is gone.
-The thyristor gate is getting a signal from the circuitbord from 5Hz till 58,5HZ
-After 58,5HZ the IC is taking over and control's the thyristor gate
Measurements to follow