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AEG 74850 Control panel fault
  Posted by Attila Tóth on Wednesday, August 22 2012

Hi!

I have an AEG Lavamat 74850 washing machine. On the control panel, in the power supply circuit the LNK305 off-line switcher IC and the fusible resistor has gone. I've replaced them, but the resistor's value was not recogniseble and I did not have a circuit diagram and the hungarian service centre could not (or did'nt want to) help me. I built an 8.2 ohm/2W resistor in (which is recommended in the LNK305 application example).
The washing machine was working for about two weeks, and the reistor has gone again (only the resistor the IC is working). I've replaced it again and the machine works again. The question is the resistor value (8.2 ohm good or not) and what could be the root cause. I looking forward your ideas. If it is possible please send me a circuit diagram. Thanks in advance.


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