Recently I measured the current absorbed (5V line) by my plus4, it was near 1A
It means around 5W of dissipation, so my PLUS4 has to rise its inner temperature to reach the thermal balance for dissipate 5W.
This over-temperature is the ambient where TED and CPU are immersed, making their surface temperature more high.
how it's possible to lower the TED and CPU temperature? simply: putting them in a fresher ambient!
It can be done replacing old chips with chips that use more recent technology: they use a lot less power, and heat the ambient a lot less....
The first "oven" is the original PLA, but also the ROMset don't are joking....
Replacing PLA and 4 ROMset the current of my PLUS4 fall down of 30%!!!!!
There is a "direct relationship" between W used and over-heating inside the PLUS4, so now my PLUS4 have 30% less over-heating inside: my TED and CPU are immersed in fresher place, so they will be fresher (their temperature will be lowered by the same degrees as the internal temperature will be lowered)
I was thinking only to replace chips that are cheap to be bought, but if you replace the CPU with a "C-MOS substitute " the thermal gain increase: 80mA of less current!
https://www.amibay.com/showthread.php?106203-8501-replacement-for-C16-Plus4-work-in-progress
Originally 1A now 0,6A: overheat is limited at 60% of nominal,
with benefit for all old chips, for the TED, and to Power Supply Unit too!
NOTE: all without modify the motherboard (and preserving in a drawer the expensive and rare original chips...).
The same idea can be applied to C16....
It means around 5W of dissipation, so my PLUS4 has to rise its inner temperature to reach the thermal balance for dissipate 5W.
This over-temperature is the ambient where TED and CPU are immersed, making their surface temperature more high.
how it's possible to lower the TED and CPU temperature? simply: putting them in a fresher ambient!
It can be done replacing old chips with chips that use more recent technology: they use a lot less power, and heat the ambient a lot less....
The first "oven" is the original PLA, but also the ROMset don't are joking....
Replacing PLA and 4 ROMset the current of my PLUS4 fall down of 30%!!!!!
There is a "direct relationship" between W used and over-heating inside the PLUS4, so now my PLUS4 have 30% less over-heating inside: my TED and CPU are immersed in fresher place, so they will be fresher (their temperature will be lowered by the same degrees as the internal temperature will be lowered)
I was thinking only to replace chips that are cheap to be bought, but if you replace the CPU with a "C-MOS substitute " the thermal gain increase: 80mA of less current!
https://www.amibay.com/showthread.php?106203-8501-replacement-for-C16-Plus4-work-in-progress
Originally 1A now 0,6A: overheat is limited at 60% of nominal,
with benefit for all old chips, for the TED, and to Power Supply Unit too!
NOTE: all without modify the motherboard (and preserving in a drawer the expensive and rare original chips...).
The same idea can be applied to C16....
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