Mind explaining in baby terminology, what you're referring to when saying "element"?
EDIT: At this stage I am not even connecting the actual blanket, the controller should light an LED if it's functioning (I also know cause I have a very similar one that works, LED lights on even with the blanket disconnected).
There are two switch contacts, one on the line side one on the neutral side, They both need to be making contact, There must be a plastic actuator that presses them so they make contact. I would be carefull there will be 240vac across them.
I also just notice a smd resistor that seems to be missing, It is R2, it is part of a series of 4 resistors
There are two switch contacts, one on the line side one on the neutral side, They both need to be making contact, There must be a plastic actuator that presses them so they make contact. I would be carefull there will be 240vac across them.
Yes I am, I also mentioned a missing R2 resistor, it likely fell off at one time and is missng which is likely causing the problem. It seems to be for the low voltage that supplies the ic. Check if it is still in the case or on the surface where you opened the case.
This is why it's not working, R2 is part of the 4 resistors that drops the ac voltage that feeds D1, which is then clamped to around +5v by ZD1 (N8). That feeds D2 and capacitor C1
Yeah I'm extra careful with that 240V thanks for the reminder
To be honest, those contacts seem to be making contact already, and there's no device that pushes them. Not sure what the idea behind it is. Tried to take a photo using a magnifying lens.
Now I see the missing resistor. I'll try to find an equivalent one from a laptop/computer motherboard. Should have done a better visual inspection! You've got a good eye
R2 should be a 1002 (10K) The contacts could be making connection now, but I suspect there is a slide (power on/off) or something in the case that causes them to open.
R2 should be a 1002 (10K) The contacts could be making connection now, but I suspect there is a slide (power on/off) or something in the case that causes them to open.
Good to here it's up and working, I wish I would have noticed the missing resistor earlier, It was'nt untill I was tracing the low voltage circuit that I noticed it.
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