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Old 10-31-2020, 09:40 AM   #67
beetle1303
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Join Date: Jul 2019
City & State: Singapore
My Country: Singapore
Line Voltage: 230VAC 60Hz
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Posts: 169
Default Re: Tefal GV8962 Pro Express steam iron - no power

Quote:
Originally Posted by budm View Post
So pin1 of U2 is the Output pin for feeding VCC for the IC's.
You can try removing C7 first to see if the resistance will go up or not, there are also other filter caps connected to this VCC line that have to be checked, worst case will be that the IC's are damaged.
I have already removed C7 and the resistance remains unchanged at 20.8Vdc. I have also attempted to trace and measure all the caps an resistors leading to the Vcc of the 2 ICs. Not surprisingly, I do not know what I was doing... But I feel the resistance pretty much measured 20.8Vdc in most places along the trace.

I reckon that this would not go very far to determining what else is faulty beside the now apparent U2 being blown opened. But suffice to say replacing the R1 with a 5W 100 ohm was a MAJOR MISTAKE!! Nonetheless, it has been very educational, and I want to thank you (and CapLeaker) once again for patiently guiding me alone this learning journey.

Thank you.
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