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TS440S.37
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1992-09-15
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865b
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ts440s.37
TS-440 Fan Temperature Mod
R:900624/1650z @:AG0N.#WNE.NE.USA Z:69334 #:6729 $:6729_AG0N
I don't know about you, but I don't think solid state equipment needs
to run hot enough to fry an egg on. The fan on the 440 is set to come
on at 50 deg C. That makes the heatsink hot enough that you can only
put your hand on it for about 3 seconds without being in pain.
Looking at the schematic and pondering the situation, I decided that it
would be quite easy to change the "trigger" point for fan operation.
This mod will do just that and not effect the "high-temp-shutdown" mode
that is provided in case the fan dies. Actually, it wouldn't be a bad
idea to make the same sort of mod to that circuit too, but let's just
do this one for now. I'll put out another bulletin on this if I go into
the failsafe circuit.
continued in ts440s.38