The type of machine by the IC1 microprocessor 14021 WFCS (CPU) control the machine work, within the normal time to control the power supply circuit output 6 V, 3.2 V, 4 V respectively three dc voltage to the IC1 26} {{25}, and {19} feet (see local circuit shown in the appended drawings). Any of them can cause abnormal voltage all the way the washing machine can't normal. Multimeter is measured 26} {, {25}, {} 19 feet voltage is normal; {27}, {} 28 feet (crystals) voltage of 4.5 V is normal; {3} feet normal voltage of 3.95 V, which indicates that microprocessors working properly. {3} feet voltage by the resistor R1 to triode V4 b, V4 conduction, thus VS4 trigger conduction, solenoid valve and the water, open the inlet valve automatically sheung shui, when the water to set the water level and the water level detection signal detection device to IC1, IC1 to instruction makes washing machines 53Cservice manual download site
 53Cservice manual download site
Motor rotation into washing. Measuring triode V4 conduction and fill valve, which have not been action, doubt bidirectional thyristor pipe VS4 damage. Trial wire short answer the bidirectional thyristor tube after electrify, solenoid valve and the water showed bidirectional thyristor tube VS4 is damaged. Replace same bidirectional silicon controlled rectifier tube, the washing back to normal.53Cservice manual download site