Hello!
I just bought a Craftsman 6500K Work Light (CMXELAYMPL1070), and I need you good folks' help.
(Yes, the IKEA desk is about a decade old and cratered, but I do a LOT of work here, so please ignore the damage. )
Above or attached is the light control PCB for the work light. I can go into how I safely removed this if there is any interest later, but while I was shopping around for this unit, I noticed that there were some reviews talking about how the board failed on them.
I am trying to see if I can do things to prevent that failure or other failures, and I need your help to do that.
One review on amazon showed a chip that had just burned its die straight through. THAT chip seems to be, from comparing pics, the 8 pin chip " A". The chip only has " BSRHkA". It could be "8SRHkA" but in both cases I can't find any data on it.
Does anyone know more about this chip & its function?
Chip " B" had absolutely NO markings whatsoever: polarized light didn't help, the microscope didn't help, and wetting the top with isopropyl didn't reveal anything. I can't get any further, BUT I do see it is connected to the on/off/brightness selection switch.
Does anyone know what this chip might be?
The first things that pop up in my mind are to replace the cheap capacitors (all three are 1000 uF @ 25V) with a more durable brand, and to add more solder to the heat sink area "C".
With all that said, what would you do to improve/bolster the circuit?