On the basis of analyzing circuit of SN388 cross-station, the paper introduced the solution of failure in input circuit, protected circuit and switching circuit of cross-station.
When the automobile is incircuit trouble and taken to the service station, circuit trouble simulation tests should be carried through to recur to the trouble phenomenon and eliminate the troubles.
It should satisfy dynamic stability, thermal stability, switched-current and switch up-down selectivity in a short circuit while selecting the pumping station using electricity system equipments.