Question about Sharp R-202EW Microwave Oven
I had the same problem with my Sharp R-330F. Everything worked fine except the display was very dim. I figured out that the backlight LEDs weren't receiving any power from the microprocessor board. (Three surface-mount LEDs on the circuit board behind the display). I couldn't trace the problem past the microprocessor board, so in the end I manually connected the LEDs to the +15V supply on the board via a 4k7 resistor - cut the track to the microprocessor board, soldered a 4k7 resistor to it, and soldered the other end to the ground of the bridge rectifier on the board. 4k7 was a guess but the brightness is about right.
The display works fine now, but this repair isn't for the inexperienced. Actually this is the same repair suggested by the "guest" above, but when I first read that solution I thought it was a joke. It isn't, and it works!!
Posted on Dec 16, 2008
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Posted on Jan 02, 2017
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