1975 Datsun 610 Transistor Ignition Unit Circuit Diagram. The transistor ignition unit provides the following functions: It makes and breaks the electric current in the primary circuit of the ignition coil. The duty control circuits sets the rate of make and break within one cycle, i.e., this maintains good ignition characteristics of engine from low speed to high speed and is equal to the dwell angle in the conventional breaker type distributor. A preventive circuit against locking is Read more […]