Inside of TZM150 Original CDI

Capacitor discharge ignition (CDI) or thyristor ignition is a type of automotive electronic ignition system which is widely used in outboard motors, motorcycles, lawn mowers, chainsaws, small engines, turbine-powered aircraft, and some cars. It was originally developed to overcome the long charging times associated with high inductance coils used in inductive discharge ignition (IDI) systems, making the ignition system more suitable for high engine speeds (for small engines, racing engines and rotary engines). The capacitive-discharge ignition uses capacitor discharge current output to fire the spark plugs. -> Wikipedia

So you are wandering the content of TZM150 CDI? Here is the picture

8051 UController (top) -> used for the YCLS I assume..some caps..some transistors..and at the back, some surface mount(transistor,caps and resistor)...

^^v