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I just got hold of a non-working LC2. I have tested it with a old fashioned 60W bulb and it’s not responding to touch or IR.
Internally, I checked the 5V supply in a number of locations and it’s reading about 0.5V.
I removed the main PCB from the casing and noticed scorch marks – you can see them just above the coil mounting in the picture below:
I first thought that the scorching had come from the mains supply terminals but there is no sign on the terminals or around the other side of the casing.
I therefore checked the PCB and found that Resistor 1 (bottom right, next to the Zener diode) has failed open circuit. (I checked it in-situ because one terminal is not connected to anything other than the non-connected N terminals). According to the manual it’s 5.6 ohm, 10%, 0.4W.
My plan is to simply replace the resistor and see if that cures the fault. Clearly I am hoping that this is the fault and not a symptom!
Any comments/observations? Anyone seen this fault before?
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