shannell said:
Hi, I am trying to quieten the 80mm 12v fans on a CRT projector.
Any reccommendations? Dick smith only had the 1 watters...
Reduction of the airflow into the projector could shorten the lifetime
of some components due to elevated heating of these components. These
could be lamps, the crts, which would probably depend on circulation
of cooling fluids on the screen of the tube via convection anyway,
electrolytic capacitors, most semiconductors, etc.
If you can try to find out the manufacturer of the fans, and the model
of the fan, then you can identify the amount of airflow the fan pushes
into the projector. You could then attempt to select a low noise fan
that has an airflow (typically measured in litres/minute|hour) that
is equivalent or greater than the existing fans. Low noise fans typically
have lower flow rates than equivalent size fans.
RS Components and Farnell have a selection of 80mm fans, both 240 volt ac,
and 12 volt dc. Others in this ng could recommend other suppliers.
Then again, if you modify the projector in any way, you could void the
warranty, if it's still valid. If it's out of the warranty period, then
I'd recommend you employ a qualified tv technician/repairman to carry
out the required modifications. Also, there may be a modification
sheet from the projector manufacturer that details how to fix a noisy
fan problem.
--
Regards
David
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