I'll take some more detailed photos of the board. Part or whole? That is the question.
I had a fright earlier and am concerned I am wasting my time and everyone else's.
The wiring from the PCB to the display had broken through. I repaired this temporarily and bought a replacement.
I need to check chronology of when that cable arrived. I'll explain why.
I ordered the wrong cable and it didn't fit. It's s bit difficult to order the correct parts when you don't have a parts diagram. As of yesterday, I now have a parts diagram.
I therefore needed to do a more permanent repair in the PCB to display cable.
I plugged in the cable today and realised it was the wrong way around.
The worry now is did I actually blow the display when the PCB exploded.
I've got it plugged in now and the fans aren't working. Did I perhaps not Okug it in correctly before?
When I say plugged in wrong I mean the colours at intermediate connector is wrong. Perhaps it makes no difference.
If the triacs power the fans, and the fans aren't working, why?
At what point do I throw the towel in and give up?
I am just checked over all the lead type resistors in the board and they are all fine.
Just noticed that the reed switch appears closed. Reading back through the topic stj states it should be open. This may be why the fans and lights are now not coming on perhaps?
EDIT: reed switch fine continuity when magnet near and loses continuity when magnet removed.
I would concentrate on when you blew out the land on the board. Where does the run go to on the top side of the board. Instead of reading through all this post . Can you state the first problem you had before you blew you the land? When you blew out the land any component attached to that land could of been taken out. It would be dependent on what is the weakest point of the design.
i would use ground on the chip its self says in the pdf just be really carefull probes dont slip just wait for someone else to confirm though.
Indeed. I was thinking I could use GND on the chip but I don't want to blow this chip up. I've no idea if I can use that ground.
Also looking at the data sheet this chip doesn't appear to match. The PDIP chip has a semi-circular indent in one edge but my chip has a semi-circular indent AND a circle indent too!
Check ST website and found an M93C86W ( that's a 33 page manual so not sure if this matters. Same voltage range though).
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