Submitted by Terry
I have been concerned about
the temperature of the heatsink (and associated IC voltage regulators)
that are behind the internal speaker, on the upper (PLL) board. I
tried to use a very small +12V laptop cooling fan, but abandoned that
when I found out how much RFI the little fan produced. I decided
to add some additional heatsinking by adding four heatsinks designed to
be used on TO-220 devices.
I used the original mounting
bolt and nut to hold an additional two heatskinks per IC—one between
IC and the stock heaksink, and another one on the other side of the
I used heatsink compound to improve the thermal coupling between the
surfaces. This resulted in a dramatic decrease in the heatsink
IC operating temperature.
I have worked in electronics
for the last 30 years, 23 years of which was as a TV Engineer, and I
found that excess heat is the main cause of component failure.
the rough life my R2000 has experienced, I want to reduce the risks as
far as practical. The heatsinks cost me nothing as I salvaged
from several defunct PC power supplies. It took about 20 minutes
from start to finish to complete this modification.
The standard disclaimer applies:
only attempt to do modifications that are within your skill
It would be a shame to ruin a working device.
corrections or additions may be emailed here.
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