69M3E11 1-12123456789Technical tips 1TCI systemThe TCI system operates as follows.Before ignitionAs the flywheel rotates, the primary coil generates a voltage and an electric current A. This electriccurrent opens transistor Q1 and, as a result, an electric current B flows to the primary coil.IgnitionAs the flywheel continues to rotate, the voltage generated by the primary coil increases.When the voltage reaches the operation voltage of transistor Q2, an electric current C flows to tran-sistor Q2 and opens it. As a result, electric current D flows.Ignition timing occurs in this instant.At ignition timing, the electric current B flowing to the primary coil through transistor Q1 is cut off,the secondary coil generates a high voltage by electric induction and an ignition spark is fired by thespark plug.S69M1200A BQ 1Q 2S69M1210CDQ 2BQ 1Features and benefits / Technical tips
