Kawasaki S2 (1972-1973) [110/129] Inspection

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During each cycle of alternating current where the voltage exceeds 15 volts the zener diode starts conducting at 15 volts and stops conducting when the voltage drops below 14 5 volts The thyristors start conducting when they arc gated and stop conducting each time the voltage reaches the negative half of the cycle The result is that the voltage level is held down to a 15 volt maximum 3 Inspection Make the following checks in the order given going on to the next step only if the previous one checks good For testing the white yellow and pink leads from the thyristors can be grouped together as one 1 Check that the resistance brown and the case is more titan resistance of less than this indicates component 2 Check that there is no current high resistance in either direction and Any significant current flow between 1 KS2 A a shorted flow i e between indicates 3 Connect a 12 volt battery between an Qwith the negative lead to and positive to as shown in Fig 387 Use an ohmmeter teste to sec that current will not flow from 1 If current flows the zener diode is de 4 Connect an additional 4 volts or so series with the 12 volt battery to make a to of over 16 volts the breakdown voltage of zener diode Again check for curmet flow fr to If current now flows the regulator operating correctly if no current flows either

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