cfcubed
1000+ Head-Fier
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You need not worry about components that are <= 75C. Only your ICP reading is cause for concern.
BTW my bet is many CTH's ICPs are running up to 80C & have been doing so for years.
Please let us know the input voltage to ICP (pins 1 & 2), perhaps your A/C adapter is supplying > 27 VAC under load.
You can also search my posts about ICP's heatsinking, e.g. you don't want to snug it all the way down on the PCB. You want ICP & its heatsink up off the PCB.
If you still have temp problems consider doubling up its heatsink, since its tab = ground you need not worry about its contact w/case or lid.
BTW my bet is many CTH's ICPs are running up to 80C & have been doing so for years.
Please let us know the input voltage to ICP (pins 1 & 2), perhaps your A/C adapter is supplying > 27 VAC under load.
You can also search my posts about ICP's heatsinking, e.g. you don't want to snug it all the way down on the PCB. You want ICP & its heatsink up off the PCB.
If you still have temp problems consider doubling up its heatsink, since its tab = ground you need not worry about its contact w/case or lid.