At the time of the launch of the heil frequency-wave washing machine, the start-up button was pressed gently, and only one click was heard, which indicated the fc failure code. All functionality keys can be used properly before you press the start key. As you know, the fc represents a communication failure。
First, all the links were scrutinized and no signs of being bitten by rats were detected. Wire packs were then opened to see the connectors and no corrosive or poor exposure was detected. The transformer panel was then unloaded and it was found that the light was on and that the voltages of 300v, 15v and 5v were measured in normal range. However, when measuring communication lines, their voltage remained at 13v, with no sign of beating。
No anomalies were observed in the extraction of waterproof glues, the extraction of trans-frequency plates, and the detection of the optical and peripheral parts of the receiving circuit. Communications signals are sent by computer boards, as can be seen from the receiving circuits on the transformer panel. After disconnection of the signal lines, no jump voltage was observed, which resulted in the determination of a computer plate communication failure。
The waterproof tape of the computer plate was removed and the communications section was inspected, and it was found that there were short circuits on the two feet of the nr2 filamented n6. A great deal of information was consulted and no information was found on the components represented by this n6 print. It is strange to note that the nr1 is the same model and to take down the measurements, which resemble two diodes and a field effect tube。
It took a lot of effort to get a piece of heil's fm board from the wasteboard. After being dismantled, it was found to have approximately the same lines of communication, with the same markings as nr1, nr2, but the silk print was m1 and the same information was not available. It looks like a combination of two diodes。
Again, two m1s were replaced and the machine was working properly and the fc failure code was not present. Measuring the voltage of the communication line, which is between 4. 5 and 6. 5 v。
Lessons learned are drawn from the experience that, when activated, communication voltage can be measured and, if the voltage is not beating, the computer plate can be replaced directly; if the voltage is beating, the transformer panel can be replaced so as to avoid many circuits。
