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S2 (1972-1973)
Инструкция по эксплуатации Страница: 114

Kawasaki S2 (1972-1973) [114/129] Rectifier

Kawasaki KH400 (1974-1976) [114/129] Rectifier

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112 This puts the ammeter in series with the rec tifier and battery so that battery charging current can be measured m Using the highest resistance scale of the ohm meter measure the resistance between each dynamo wire and chassis ground the engine or frame etc No reading is normal any meter reading indicates a short and the stator assembly must be replaced n If the windings have normal resistance but voltage and current checks showed the dynamo to be defective then the rotor magnets have probably weakened and the flywheel magneto must be replaced 2 RECTIFIER 1 Construction and Operation i Turn on tire ignition switch and start the engine j Holding engine speed at 4 000 r p m note the meter reading A reading of 4 0 6 5 amperes is normal if the current is much lower the dynamo is defective k To determine whether the trouble is with the windings or with the flywheel magneto first turn off the engine and disconnect the white 3 pin plug 1 Using the R x 1 scale of the ohmmeter measure resistance between the two yellow leads which comes from the generator Resistance between the two leads should be 0 45 0 7 ohms Less than this resistance means the coils arc shorted a higher resistance or no reading at all means the coils are open If the coils arc found to be open or shorted replace the stator assembly The rectifier is used to change die alternating current AC from the generator to direct current DC for the battery charging lighting and other circuits If contains four diodes connected in a bridge circuit arrangement for efficient full wave rectification The new rectifier for K1J400 is molded into an aluminum housing with many fins for better heat dissipation The reason that the diodes can change alternating current to direct current is dial they only conduct in one direction from the to side The figure shows die alternating current from the generator is rectified by the four diodes connected in a bridge The A arrows indicate current flow during the first half of the cycle when the top generator lead is and the bottom lead is the B arrows show current flow for the other half cycle CAUTION Excessive heat or current in a semi conductor will cause it to break down and current will then flow through it in either direction Once a simiconductor has broken down it will not return to its former semiconductor state and must be replaced 2 Inspection Unlock the seat and swing it open With the engine off disconnect the yellow 4 pin plug coming from the rectifier Using die R x 10 or RxlOO ohmmeter range check the resistance between die red each yellow each yellow red black each yellow each yellow black wires a total of 8 measurements Resistance should be low in one direction and infinite in the reverse direction Rectifier Circuit

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