how to work on pcbs that are thick

A

amateur_24

Member
I am using aoyue 2702A+ rework station. I think the ps5 otherboard is difficult to bring up to temp so I desolder stuff off it.

I have my hot air set at 480 degrees celcius (max) then airflow at 80. I was sat there for several mins butI still couldn't get the mosfet off.
What am I doing wrong?
 
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My power boards have very thick coper. Many layers. Most layers are 90% copper.
I sometime put a board in my wife's oven and heat the entire board. I now have a toaster oven I got used for $5.00. Heat everything up. If you only want to remove one part you can heat the entire board to below the milting point, then use the hot air gun to heat the one part you want off.
 
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How long do you preheat the board for 1 min
 
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