Maytag Neptune PCB R18 value

[Galen]

A friend in Mexico has a couple of burnt resistors on the PCB of his Maytag Neptune MAH3000AWW washing machine. They are R18 and R19, and they're burnt to the extent that they can't be identified. I got a value for R19 of 22K ohm from this forum, but I still need R18. If anybody might have this information, I'd sure appreciate it.

 

[73's de Edd]

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Sir Galen . . . . . . . .


Applying a little NASA procedural, using spot averaged digital enhancement and a bit of pixel dithering and we come up with:

Now, of that cluster of interest . . . . of four . . . R11- R 12- R13- R18, we see them also being 22K @ 5%'s also.
For one of them to fry to your referenced extent, must have been the full fury and WHACK of one or both of those 470 ufd @ 200VDC adjunct
filter capacitors, or they possibly are being wired as voltage doublers.
SINCE with only a 200VDC supply, that value of resistor would only be subjected to 1.8 watt overloading, step up to an ~ 400 V supply and
at 3.6 watts , that degree of overloading, is a completely different story.

But he DOES KNOW, that he will ALSO be tracking down the SS device(s) downstream that is /are completely crashed . . .right ?

Thassit . . . .


73's de Edd


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[Galen]

Thanks a bunch. And to you questions - he and I both both did not know that some solid state stuff would also be wiped out... but now we do!

 

[shrtrnd]

Galen, the solid-state stuff burned out, .... THAT's what fried the resistors (not the other way around).