[exemple １ ]  breakdown phenomenon: The indicator light after electrify is bright, program controller works, electromotor does not turn.
Analysis and overhaul: The locomotive electric machinery of this washing machine is electromotor of single-phase series excitation. Limits of working rotate speed 800 ｒ of 500 ～ ｎ of ／ ｍ ｉ , to adjust rotate speed of series excitation electric machinery, a timing board is installed alone in dominating circuit, cooperate program controller, make electric machinery plays the rotate speed with corresponding generation in the working status such as catharsis, dehydrate.
It is normal that after cutting off the power, the electric machinery armature, stator, block that measures fast winding is measured to be worth with avometer; Also do not have scorch trace. When catharsis program waiting to arrive after switching on the mobile phone, measure end of timing board AC to have report (the timing that occupies objective mapping board circuit is shown like attached drawing place) . Measure timing board N and F end again (namely T1 of two-way silicon controlled rectifier, T2 is carried) have AC220V, demonstrative silicon controlled rectifier is in off-state. Measure timing collect to become the {13} base of a TDA1085 again, control report presses the control to silicon controlled rectifier G pole, break electric welding to issue two-way silicon controlled rectifier to measure, discover control pole and other leg already open circuit. Because cannot find former model (BTB24. 600 B) two-way silicon controlled rectifier, try out is homebred model era changes 3 CTS10 two-way silicon controlled rectifier, after outfit machine, electric machinery movement is normal.
 　 [exemple 2]  breakdown phenomenon: Open Electromechanical source light to shine, overall do not work.
Analysis and overhaul: Power source light is bright, explain advocate switch and filter wave component are normal, report is not had after the switch that measure the door, reckon door switch has trouble. The structural principle of door switch is by PTC electrify is given out heat, make bimetallic reed is out of shape close, make door lock is locked up oneself at the same time, wash clothes in order to make to cannot open the door in the job, the ability after stopping power supply 2 minutes only opens the door, in order to ensure safe.
Cut off the power tear open switch leaving the door, interior is heard to have shiver sound when shaking, lever predestined relationship of model sealing side carefully, see PTC of pottery and porcelain (normal and constant lukewarm block value is 800 Ω ) component has strike a light to scorch rupture to be in more, after changing switch of a congener door, switch on the mobile phone, everything is normal. Go to the lavatory for the overhaul, use now 500 model avometer resistor blocks measure this machine each are laden a normal block value as follows: Program controller electrical micro-machine 6 ｋ Ω ; Catchment pump 150 Ω ; Heater 30 Ω ; A powerful person of the electromagnetism that drink water 4 ｋ Ω ; The excitation winding of electric machinery winding of 4 Ω , armature 2. 5 Ω , measure fast winding 110 Ω .
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